JPS609323A - Digital protecting relaying device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a digital protective relay device, a multi-purpose device for the purpose of protecting people's lives, protecting their lives, and saving their lives.
, Mamoru (nori r tonki J-) Digicle protection '4'i
: 45% in what I say directly to iLY magazine.

[February 6 Ming's electrical connection IW 9J',,] Protection using a microcomputer, f:ri ilj llj
In other words, digital relay devices, which are based on digital relays, have begun to be put into practical use by taking advantage of the unique features of digital relays. One of the features of digital relays is the large number of relays! , y, tree f
There are some points that I17 can do. Take advantage of this feature7. Collar 1 174: ',,,,'J? ! - also possible digital type maintenance relay electrical system ji1. Conventional + i' + Naruhisa l'tx
is shown in the figure. In the following explanation, a single phase will be explained for the sake of brevity. The first example is a drawing device that inputs a large amount of electricity, which is disclosed in [1988 National Conference of the Institute of Electrical Engineers of Japan, Ml') Proceedings 4979, "English translation of a digital fault continuation detection device". The configuration shown is as follows.

The Dinotal type protective relay device shown in FIG. 1 consists of a first device 1 for life insurance and a second device L for safety protection. 1 long and n lines of power transmission! Width of 21+22...2n: Current is input into current transformer 3 and cable 4, and voltage is input from voltage transformer 6 and cable 7 connected to mother, -5.

In the second device 19 the cables 4 and 7 are each laid up to the cable terminal 8, and then the internal cable 9 is laid up to the auxiliary transformation 1710. And <iU support metamorphosis? r
'610 is an output 811 18 which converts the 'rJL current and voltage input from the thickened cable 9 to an appropriate No. 18 level.
12 y...Sin is output to the analog 7-diphthalmic converter circuit (hereinafter referred to as A/D) 11. This A/Dll
is the sampling signal s9 output from the mountain U leg circuit 12
and switching signal 810, and when sampling signal S9 is input, all inputs are sampled simultaneously, and then switching signal 1 is input.
By inputting No. 6 810, the sampled total human power is converted into an llffl-order digital signal, and the data 1
No. 6 S11 is output to the arithmetic processing unit 15 (hereinafter referred to as CPU). The CPU l5 receives the switching signal 810 and the data (i
N seconds 811 is input, the type of input of the data 1iV number 811 is determined based on the switching signal 810, and the CPU 1.5
Write the data signal 811 at the fixed location 141r in 1. I will. Then, this memorized power transmission line 21122...2n
Transmit power using γ・ICll1″r and the 71 yuan source pressure of bus 5.
, will be carried out.

As a protection method in this Hoshohama↓L, Q, Ifll
The distance relay method is used for short circuit protection (1, 1μ), and the earth fault direction relay method is used for ground fault protection (1μ). C
I'U15 transmits power: dJl 21+ 2 * +...
When a failure of 2n is detected, a trip command 821°S22, . . . S2n is output to each breaker.

On the other hand, the first device 11t12w...lnt has transmission lines 21, 2a*2g, and 24. ...2n-! and 2n
The 41-inch configuration of the device is the same as the second device arrangement, with the only difference being the amount of input.

As a protection method, for example, '&' is used for glB selection.
The +4 method is used, and the letter is sent in units of two lines.

[Problems with background technology]

In the above book 4 configuration, 2g2 installation fd 1 CPU 1
5 can protect n lines with one device, so the circuit for determining failure can be significantly downsized, but on the other hand, it has the following problems.

First, it is necessary to input the current for n lines of the transmission &1t191, so at least n current cables must be routed to take in the current. This multi-way cable routing still poses a problem in terms of space for cable pits, etc., despite the fact that the space required is reduced due to miniaturization of the board.

Second, there is the problem of the complexity of Banenkai II Soot.

That is, since a large number of cables are connected to the cable terminal by rising from the cable bit, and one false inner cable is connected to this terminal, the distribution section on the event side is extremely difficult to handle. This results in a big problem in wiring work.

, 153, there is a problem with the number of input circuits. Tap, fit circuit b'1'' in auxiliary transformer 10 and A/Dll
1 and a zangle hold circuit (not shown) t, 11;
'II, i>ifl When looking at the input, it is equal to the number of lines x the number of phases, and it is necessary to provide this number of circuits due to the shift. As a result, these circuits will be proportionally increased due to the input, and the digital relay will be used to perform the 111 operation many times.
It's a big hindrance for someone a little higher than that.

[Purpose of the invention]

The present invention was made with the aim of solving the above-mentioned problems.
As the number decreases, the number of self-propagating fathers (1 in L9i) increases.
(ii) It is an object of the present invention to provide a digital protection device fj=+° in which the input circuit of a protection device that inputs Ao is miniaturized.

[Invention of (1?['ll Yagi Shimei from each round sending line to brown 1 device 1 1.-\take 1 1゛ and shi, uno, k'yama, ki (i, analog /Digital Ku1) 'L1., Jin's converted digital data is transmitted to 42 devices by dinotal transmission, thereby attempting to downsize the input circuit and omit wiring.

[Embodiments of the invention]

Examples will be described below with reference to the drawings. FIG. 2 is a block diagram of one embodiment of the digital protective relay device according to the present invention, and the system configuration is four circuits.

In FIG. 2, L is a device 2 corresponding to 1J in FIG. 1, which performs maintenance after power transmission lines 21 to 240. 2
Reference numerals 11 and 212 are first devices corresponding to the top in FIG. 1, and the CPU 15B performs life insurance calculations for the power transmission lines 21 and 22, and 23 and 24. Note that the projection methods of the first device 211+21* and the second device are the same as in the first picture.

First device 21. In the configuration of the first device 1 of FIG.
The difference from 1 to 1n is that the first parallel/serial conversion circuit (hereinafter referred to as P/8 circuit) 22A2-1<1 NoP
/S circuit 22A is = gi + lJ 1141 circuit 10
(7 cutout signal S12 output from 1, clock signal 5
131 and switching 1d No. 810 as input, writing No. 1 d No. 8
The switching signal SIO at the time of input of 12 is kept as a clock signal,
Convert to serial number 18 in synchronization with 3□, J 2 (7
)...25 [output 514A+ for character 7 -9.・1 le 2 I'/S times 1it+ir 22 B is
lII Komi No. 812, Clock No. 111 S13. and the data signal 811 are input, the data signal s11 at the time of the input of the -1 input signal 812 is inputted, and the clock signal 5 is input.
The data [F] in parallel 1st issue in synchronization with 131 is>
j 811 to serial No. 1R and 42 y ÷ 1 (
t'', a C output 814Bl is output.

The configuration of the first device 212 is exactly the same as the first device (21+), and the P/S circuits 22A and 42 of the 5141
The P/S circuit 2213 is turned on, and after reciting once, outputs 514A and 514Bp are sent to the second device 6.
'-Output for each person. Therefore, the first device Jt
21 + and 212 to the second device d or J,
Clock signal 5131, output 514AI and output 51, respectively
4B1+, a clock signal 5132, an output 514A2, and an output 814B2.

Furthermore, the configuration of the second device -4"- is different from the second device -L"- shown in FIG.
, A/Dll and control circuit 12 are not provided, and the circuit described below is added.

That is, the first serial/nocrarel conversion circuit (hereinafter referred to as S/
23 A is the clock signal 5131
Output 515t and output 5 which are inverted by the inverting circuit 241
14A, and input the same Jυ to the clock signal 5151.
j and the output S 14 A1 f: ij outputs an output 516A converted into a parallel signal. Same as 4'>'A, 2nd
The S/P circuit 23Bl outputs the output S15! and output S
l 4 Bl as an input and outputs an output 816 B. Further, the counter 251 inputs the output 8151 and counts its pulses, and when this reaches a predetermined value, r=
An i.include signal 5171 is output to the CPU 15C. The CPU 15C simultaneously samples the 1st pressure and electromagnetic data of the senders 21 and 22 and the Chinzo 5 and inputs it as a multi-output 816 Bl.
The type of electrical quantity input serially as B1 is identified from the output S 16 At-1 and taken in. Furthermore, the glutton signal 817. By inputting the output S L G B1
Then, it is determined whether the output 516A1 is the input 6-pin function as the A-rare Louis No. 8.

ji'43 +2) S/P circuit 23A2 and fourth S/P circuit Pi't 23+120, each output 5
14A2 and output S14Bs and clock signal 513
2 is inverted by the inverting circuit 242, and the resulting output 5152 and -
It outputs human power t/, an output of 516Az, and an output of 516rh. In addition, the counter circuit 259); is output 5152
is input and a calculation signal 5172 is output. From the CPU
15 C is power transmission #23 and 24 and P) approaching 5-15
, pressure, 'fl:j: Quantity of flow data For the data pulled, output S 16 A2 816
It can be obtained by inputting R2 and output 5172.

Figure 21 is a time chart for explaining the operation.

In addition, "tL 31%l" indicates the response p+# regarding the data transferred from the first device fu 211 to lap, 2 (7) device 6. In Fig. 3, at a constant period To The older Sambring 1d S9 is at time t.
At the same time, a switching signal 810 for selecting the quantity of electricity of 8:'; 1 Kuraguchi is output. and time M t .

Analog/digital conversion is performed on the first electric quantity, and when there is a conversion delay in A/Dll,
The data signal 811 is established at time tl of jTlffl. Here, the minus signal 812 is output as No. 16 with a pulse width T2 from time t2 delayed by time 11, taking into account the delay time TI due to the analog/digital conversion described above. Then, write (g+j312 causes the first
The P/8 circuit 22A and the second p/s circuit 22B hold a switching signal 810 and a data 1d number 811, respectively.

Furthermore, the control circuit], OO receives the clock signal 813. from time t3. Start outputting. This clock signal $131
is output at 1'3 T 4, and the number of pulses is at least as quiet as or more than the larger of data 13-bow Sll and switching 18 810 (pi)M.

Then, the first P/S circuit 22A and the second P/S circuit 22B receive the above-mentioned clock signal 5131, and in response to the rising edge of this clock signal 5131, the data signal S11 and the cut p% signal are input. All bits of S10 are converted from parallel signals to serial signals. Therefore, between time 3 and t4, the output 814A1 and the output 814Bl have the same number of signals as the 14 times signal 810 and the data signal 811, respectively. The 111fth bit (generally the least significant bit) is output as data.Then, between the next time t4 and t5, the a!2nd bit (2 Tl\th bit from the most bit) is output.In addition, the relay conversion 'IM' M S I O and data signal Sll
, the clock signal 5131 is longer than or equal to the data bit length.
The output S l 4 At and the output 814 Bl are meaningless, but l, TI(,, 1・e) are distinguished. Note that the first and second P/8 llJ circuits 22A
.

A in 22B? Larel/7 real conversion t, time t
The process is completed until the pull-in signal 812 to the other electrician is output at step 9.

One input, the converted serial data output 514Al and the output 514Hxt, the clock signal S 131 'a'
It is inverted and latched at the rising edge of IC output 8151, and output 5
At each rising edge of 151, each bit is 11v (then output 516
Al/l'4 and output 816 are output as B1. Then, due to the rise 9 of the output 8151 at time t8,
An output S 16 At equal to the switching signal S10 and an output 816 B equal to the data signal 811 are applied. The output 5151 is then input to the counter circuit 251 and counted up to the required number of pulses, and at time t7 when this reaches a predetermined number.
In this case, the CPU 15 C outputs an output 817 which becomes "O".
1, it is known that the output 516A1 and the output S 16 B have been established. CPU 15 C has output 516A1
Since it is possible to know in advance the number of bits required for the iW information among the inputs of the output 816 and the output 816 Bl, unnecessary bits are ignored. Also, output 8171 is time 1
? becomes "0", and the output 81 for the next drowsiness aim
5. This state continues until the first rise of (time tlO').

Then, for the next quantity of electricity, the operation J) is performed in exactly the same manner as described above. That is, from time t6 to time T
S? At time t6 after ia has elapsed, the switching number 1d 810 is switched back to select the next amount of electricity. Then time 1. The data signal Sll, which is the output of the A/Dll, is established at a time t9, and the 11-inclusive signal 812 is output at a subsequent time t9. Below, regarding the P/S conversion and S/P conversion, 14=le is the same as in the case of the first electrician. In this way, the l lean pulling data for all the relays are transferred to the output 2 device 20, and the next sampling No. 16 S9 is output at time 111 (time 111), and these steps are repeated after -C1.

In addition, output 814A1 and output 8 which are serial data
14 The time width (transmission speed) of 1 bit of Bl is a sampling period of 1.66 ms (50 Hz thread system 60
If the bit length of the data is 12 bits, the time occupied by the analog/digital conversion (holding time 'ra of the switching signal S10) can take more than 100 μ8. Ru. Since 12 bits of serial data are transferred within the transfer time T6, it is recommended that the 1 bit time T4 be 5ftn or more.
This results in a sufficiently practical transmission speed. In addition, in the device 211 of Ii 1, the CPU 15B is activated at time t! In contrast to inputting data with the device in Output 2, input is made into the CPU 15C store port at time t7, but this delay is only due to the time 1iliJT5 ( In the above example, it is 100 μ8), which poses no practical problem.

FIG. 4 is a flowchart illustrating the arithmetic processing of the CPU 15C. Note that FIG. 4 shows data processing for one sampling.

First, in step 41, the temperature of the output 5171 is determined to determine whether the outputs 516A□ and 816B1 can be read from the output device 211. If the result of this determination is "Yes", the process moves to step 42, and if the IQ is "absent", the process moves to step 43. In Stella 7'42'
The type of the output 816B, which is low voltage or current data, is determined from the content of the switching signal 516Al and stored in a predetermined location. Steps 43 and 44 are the first device or unit.
The process for inputting the data from 2 is exactly the same as the process in steps 41 and 42 described above. That is, in step 43, the presence or absence of the output 5172 is determined, and if it is present, the process moves to Stella f44, and if it is "absent", the process moves to step 45. In addition, Ste, No. 44 has an output of 316 B11
is stored in accordance with the output 516A2, and step 45 determines whether the data of the total amount of electricity from the first device G, 211, and L has been completely taken in. If not, step 41 and step 4 are performed. If the process has ended, the process moves to the next step 46. For example, this determination method is based on the output 516A,
Since the output 5I6A2 undergoes a known change, it is possible to use a method of determining whether each side has reached the final level or not.

Step 46 is a protection calculation process using the current sampling block that has been inserted, and when this step is completed, data for l/f rings: XσL 1-1
1 iJ completed.

LI'y Figure 5 is a 18 ft.
't, mountain, and t are also the same, and are shown only for the first device in the latter part of Figure 2. Note that -1 and 1121g are completely turned 4tV'. Because +
g+ Not shown. Also, r('; device ^: main of 2) has exactly the same separation as in Figure 2.

In this embodiment, the input circuit shared by the first device and the second device 2) is duplicated to prevent the main protection and backup protection from failing together due to data signal failure.

In FIG. 5, in the first device 26, the auxiliary transformer 10 and the A/D circuit 11 are duplicated, and data signals 5IIAI and 5IIB output from each A/D 11 are sent to the CPU 1.
5 A and is also input to a selection circuit (hereinafter referred to as MUX) 27. Then, the CPU 5A inputs each data signal 5IIA and 5IIB, and checks whether these are output correctly, that is, whether the auxiliary liquid generator 10 and the A/DI
1 is normal.

Several methods are known for this determination, for example 3
A method of calculating the zero phase' electrical quantity from the sliding electrical quantity of each phase, and monitoring that since this value is always small, it exceeds a certain value (at the time of an accident) and is within +iJ at a predetermined time, and A method of comparing this value and the zero-phase 'ia air volume of the system and monitoring that they are the same, by checking this value by applying a predetermined voltage 111 to analog/digital &-1'A, There is a method for monitoring A/D conversion, and a method for monitoring the magnitude of outputs 5IIA and 5IIB with respect to known inputs during automatic inspection.

As a result of this judgment, is Deke I always in use? f-5II
When A is determined to be defective, CPU 15 A is MLJX
At the same time, the switching command 818 is output to the CP 27.
IT15A uses another data signal 811B to send 71.
1 star 1.・I Hama G! 2: Do. Immediately, MUX 27
is data In Tri:; ] J, A and S 1
113 and switching 4-hour order 818 by human power 172 and lido, respectively.
1 command 81 B': As long as there is no large input, output 5IIA is output as output Siq, and when switching command S, 1.8 is input, other outputs S] and IB are output. I’m tired”
Then, the output S19 &:], fIL 2 r/s times 1i'
:i 22 Input in B "Oli 14's +1° Y configuration is the first production 16-rei of Funeral 2 figure"" 2 and turn J).

In the above example l'coh)a, after replacing the data number 11 that goes up to MUX 27, it is input to the P/S circuit 22B, but first, two sets of P/S circuits are created, and + ? Data output 511A + 511B for iJ Kiriya p/s circuit respectively
It is also possible to input the P/S circuit directly and switch the output of the P/S circuit to the MUX using a switching signal.

If this is the case, the P/s circuit can be changed to 2 months, and the reliability can be further improved. If control is performed independently, it is possible to achieve a more reliable F+'.

Figure 6 shows a digital protective relay device according to the present invention.
This is another example.

In this embodiment, data input from the duplicated input circuit, 4
By transmitting the data signal through each transmission means to a second device for storing cylinders, and increasing the quality of the transmitted data signal by the arithmetic means in the second device, This is intended to prevent the first device for life insurance and the second device a for 1t5'Ina insurance from collapsing together.

In Figure 6, the first device charge and "Y" is I11 + assistant drum formation? ,′,! Both F10 and A/Dll are captured and A
/D11 output data signal S 11 A s S
11 B is input to the CPU 15D, and the porridge 2
The P/S circuit 22B and the third P/S circuit 22C are manually operated.

Nao, CPU 15 D is the CPU 15 in Figure 5 above.
Along with A, the quality of data i' 5IIA and 5IIB is determined and used for life insurance calculations. In addition, P of nitrate t3
/'S circuit 22C converts the input data signal into serial data and outputs an output S14c, and this l
The lj 4:ii'4 method is exactly the same as the second P/S circuit 22B. The other configurations regarding the device fi in hll and the device in J are the same as in the first device shown in 2M, (↓, and the device in r(shi, J).
Exactly the same as 81, 10. And in order to transfer the data signal, the output 814 B2 and the output S
], 4C2, Output S l for transmitting cutoff signal loss
4 A2, clock signals 513a+, jl, both of which are configured to output to the second device b: four '4'
72';<4J' (f, in 9, 4-d 5
(Z) The S/P circuit 23c2 of the s/P circuit 2, U C1 and Naki 6 has an output S l 4 c and an output 81, respectively.
4C2, output 515I and output 5152 are input to serial/para l,/le j wedge J, l(1,, output S 16
The conversion that outputs Cl and the output 516C2 to the CPU l 5 and +v with X.] is l; B 1-21%
4 of 3/P l” circuit 23AI +23Bt?2
Exactly the same as 3A2 v23B2.

-CPU 15Eμ When processing data transferred from the first device rL unit 1, output 516A4 +516J +5lf
Input iCt and 8171, output 5171, output 816 B, and output 816C1, output 5IGC
The type of electricity amount is determined from the contents of 1 and stored. And 15E is always this stored one output 816B
.

is used, and when it is determined that the data is good by 15E, the other output 816C1'f: is used to perform back-up protection calculation. In addition, the processing related to the data transferred from the first device 282 is exactly the same. When the output is 816 B, one of the outputs is used. , perform backup protection calculation using the other output 816C2.

According to the embodiment described above, the number of signal transmissions increases compared to the embodiment of FIG. 2, so the number of circuits and transmission cables increases, but the input circuit and transmission Since the system is duplicated, it is possible to prevent the first and second devices from collapsing due to data signal failure. Furthermore, 2
Since this is a 4i4J method in which the first and second devices individually check the quality of the converted data signals, the risk of simultaneous failure described above can be eliminated.

Side 7 shows the digital protection fJ iW >(1
This is yet another embodiment of the device vinegar.

In this embodiment, 41 devices for life insurance and public use are system rl'':
(7) 111, respond only to inflow input, and then fa 1
4 Jinki 2.7) 81i; Voltage, ``[Based on each input of the IL flow, the 1 Di7 method is used and the percentage ratio is shown. In other words, the percentage ratio is shown. .・Yoshiyoshi, ``Flow differential joint'' ``Living method and phase comparison joint + [i, , 15
A method that responds only to the 141 of the formula, g, and system is used in IL, and this is an attempt to deal with these storage methods.

(:A 71>chil, i(1 device 3Q1t3
The data signal from (12 to 11 Mi2 device l) is 'f(
4. Flow・1i't y14 only, i+t JE
If report is 61 to 2 MLt 31 #C) Lord 1471
No configuration is shown for inputting data after no log/digital conversion.

And l, I are also 1's device α3()l is sending tl, i is 21
Input only the current input from 22 and 22, CPU], 5F
ni'l? If the life insurance system responds only to the rtII record or t input, the sampling signal 891 is output from the device μt, 34 ”-output of the sampling signal 891. The device is the same as Shishi b,
Sampling signal S for 1F of sampling signal 891
Same as 9. First device N.

Similarly, for j301, only the current input from the sending 7tn responses 23 and 24 is input, and the sampling signal S
92 to the second device l''.

In the second device, each auxiliary transformer 10A.

10B inputs the voltage output from the instrument transformer 6, converts it to an appropriate signal level, and outputs it to the A/D IIA and I.
Output to IB. The synchronous circuit 32A receives the sampling signal 8
9. is input, and when the sampling signal S9° is input, in synchronization with this, the switching signal 5IOA for sequential A/D conversion of the multiphase pressure input is sent to the A/D 11A and CPU 1.
Output to 5G. In exactly the same way, synchronous times 1lII't
32B inputs the sampling signal 892 and outputs the switching signal 5IOB to the A/DI IB and CPU 15G. A/Di I A is the output of the auxiliary transformer 10A,
Sampling signal 89. and switching signal 5IOA, and the first device 30. It outputs the data signal 5ill to the CPUI 5G in the same response as the A/Dll. Similarly, the A/DI IB inputs the output of the auxiliary transformer 10B, the sampling number 48 892, and the Gino conversion number 5IOB, and outputs a data signal 5112 to the CPU 15G.

-Other configurations are the same as in FIG.

In short, CPU 15G is 15G? System 'I' of l 2 l and 2z: Inputs flow information from all information S 16 Bl and output 516 At, and switches system pressure information to A 5IOA and data signal S11. Enter from . Since each of the Ichikawa and current information is sampled in synchronization with each other, it can also be applied to protection calculations such as IFIJ edge distance relays where the phase of voltage and current is between Cq.

In the same way, the power transmission lines 23 and 24 have grid lines υ1rr・C
As for Tsurugi, the voltage information synchronized with Ichikawa input from output 816 B2 and output 516 A2 is cut off.
M number S], OB and data signal 5112 are input.

Okay, on the person's side, the first device 1'\--"
.

30g and the second device A' have the same clock signal 89
1 and 89g are used to sample the sub-devices at the same time;
At Q68°, where the transmission delay of 90 degrees becomes a problem,
-l51 device [rib and tan! The configuration may be such that the sampling time of A/DI 1 that falls on -A of the transmission is compensated for by the amount of -A of the transmission.

In each of the above embodiments, a method has been described in which a total of three signals, a data signal, a switching signal, and a clock signal, are transmitted in data transmission from the first device to the second device, but the method is not limited to this. For example, Special Publication No. 56-35039
It is also possible to adopt the cyclic digital information transmission method disclosed in the publication.

Regarding the application of the cyclic digital information transmission method to the Dinotal type protection relay device, for example,
2nd Year i4 Ki Society Tokyo Conference, Tokyo Branch Conference - Collection A95.
The automatic synchronization type PCM transfer equipment is disclosed in ``1'', but in this disclosed technology, it is defined from the transmission means (PCM transmission) for mutually transmitting the d flow information at both ends of the sending flj +l'A. Depending on the conditions, the above-mentioned ridge feeding method is adopted.

FIG. 8 shows still another embodiment of the digital storage/retrieval device according to the present invention, in which a cyclic digital information transmission method is applied.

In FIG. 8, from the first device 33M to the second device 11
Transfer of data to is performed using a serial/serial rUIJ control circuit (hereinafter referred to as psc) 35'f.

The PSC 35 manually transmits the data No. 46 811 from the A/Dll and the ramp ring (including the Fi No. S9) from the allocated 11 circuit 100, and converts the C1 into the transmission format of the frame structure shown in FIG. 9 for each sampling. A serial data output 5201 is output.This output 82 (1, is an arene, n bits of synchronization bits indicating 11, m bits of information bits indicating P ton-depressions, and n bits of verification) The system consists of a code bit, and the order of the system 'IQ' in one blueprint bit is constant, and a test code (P)1, for example, a CRC test code is used.

Since this frame can be output every time a snack is sampled, the transmission rate is determined in consideration of this point, but the overall bit length of the frame is almost the same as the serial bit length explained in Figure 143. Yes, it is possible to achieve a practical speed. First device i! '7.33 Another Jli'l j戊 of H is the first device i'i shown in FIG.
, 21 is the same, and the first device 332 is also the same.
and outputs an output 5202.

In the second device 34, the first serial/meso 2-rel control circuit (hereinafter referred to as spc) receives the output 8201, detects the synchronization bit, detects the beginning of the frame,
The quality of the transmitted signal is determined from the verification code bit and information bit. When this judgment result is good, the output 816 B, which is the data of the amount of grid electricity of Bitno Clarel, and the output S
16n, an output of 516A indicating the extreme quantity of electricity, and
``Output 8171 to the CPU 15H.

Moreover, when the determination result is defective, an alarm signal 5211 is output to the CPU 15H. 2nd SPo 362
inputs the output 5202 in exactly the same way, and outputs it to the output 16A2, the output 16B2, the input signal 6 5172, and the alarm signal 5212f, CPIJ l5I (.

And in CPU 15 I(, alarm signal -@5
The processing when 21x and 8212 are not input, that is, when the transmitted data is normal, is the same as the processing by the CPU 15C of the second device 2 in FIG. When the alarm signal 5211, S21+ is input, the calculation process is stopped and the alarm signal S22 is output. In this way, PSC
Although the use of SPC and SPC requires somewhat complicated control, the number of transmission cables can be reduced to one.

In each of the embodiments described above, the device for audience 1 is the main protection 5! Place, 2nd
Although we have explained the case where the device is used as a back-up protection device, it is not limited to this; for example, it can be used as a backup protection device (local backup It is clear that the device N) may be used as a 42 device, and the backup protection device for life insurance may be a device Kf of h'r 1. Bye.

In addition, two lines for the Hankei Expressway i'i Yu line can be combined into one line.
I explained it as aghast / Stem I 11, but Line-1
Of course, a protection system configuration of about 5 degrees may be used.

[Effect of investigation]

As explained above, according to the present invention, a large amount of electricity in the air is inputted as serial data in digital code, so that the digital insurance relay device a,
It is possible to provide a digital protective relay device that can reduce the size of the input circuit and reduce the space for laying cables in a sleeping area.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional dinotal protection device 511, FIG. 2 is a block diagram of an example of a dinotal protection relay device according to the present invention, and FIG. 3 is a time chart for explaining the operation. FIG. 4 is a flowchart for explaining the operation, FIG. 5 is a borrowed diagram of another actual flow side of the first device, and FIG. 6 is another embodiment of the digital protective relay device according to the present invention +<5. ,I? FIG. 7 is a diagram showing still another embodiment, FIG. Yu・L huge・−Reiyu 2+−46. Observe, see, maeee, 3
02, ``Yu'''', and b...first device for life insurance, 19.20,29. 21-2n...Power transmission line, 3...Current transformer, 4.7...
・Cable, 5...Bus bar, 6...Transformer, 8.
... Cable terminal, 9... Masuuchi cable, 10.1OA, IOB... Auxiliary transformer, 11... Analog/digital conversion circuit, 12, 1 no...
・Hi1j control circuit, ], 5, l 5 A t 15
B + 150.3.5 D + 1.51 Shi. 15 F g 1.5 G + l 5 II...
MJ\djoj'jlj 4"-+t'X, 22 A v
22 B + 22 C...p/s change 1/abuse 11''
h123A4 t23J 123c1123A2 +2
31'h 123c2...S/P change ia circuit, 241.24. ...Inverting circuit, 251 t25t...Counter, 27...C-3 selection circuit, 32A, 32B...Synchronization circuit, 35...S? parallel/serial control circuit, 360, 36
2...Serial/ノ2Rarel;1rll f") timeslIL+';. Patent applicant: Tokyo Shibaura Electric Co., Ltd. Representative Patent Attorney Nori Ishii Figure 1 of the male bird

Claims (3)

[Claims] (1) A digital protection relay that includes a first device that introduces multiple amounts of electricity from multiple power systems and performs main protection calculations for each power system, and a second device that performs back-up protection calculations. In the device I, the first device includes a conversion means for converting a plurality of input electric quantities into digital codes, and a calculation means 81 for inputting the converted digital data and performing a main protection calculation for the power system; The second device is equipped with a number of transmission means for transmitting the converted digital data for back-up protection calculations, and a control circuit for giving a control signal to each means, and the second device receives the data. The quality of the received digital data is determined by counting the number of pulses by remembering the control code from the quadrature receiver 1a means for receiving digital data and the I control circuit. A counter and a second riveting means for inputting the received digital data and performing backup maintenance of the power system!r!f
Signature digital 1 dumb-jJ! d + i, equipment. (2) Multiple electricity from the electric power system of i east number -M...V
Is there a main role for each power system? A digital protection mystery JR that Nao and Toshio attach to the lacquer of Output 2, which calculates 1 device for each L and 1 + #t f 11 ζ.
The device 61 of the device 1 is a double-layer device for converting the σL defeat person's support to the digital number 13.
The converted switching means and the replaced digital data are respectively inputted to perform life insurance calculations on the power system, and at the same time, the quality of the digital data is judged and the switch 11 is activated in the event of a failure.
2) 7 hands 1 for outputting the 1st front 2) 7th hand 1, a selection means for inputting each of the converted digital data and outputting one of the y゛inital data by a switching signal, and t+iJ notation *U (jd i,!j:l11...1 transmission means for transmitting the output for subsequent IAff protection calculation;
For each means 1 lilj diagonal 1,1 bow season ~ eru 11fl
l (+t11 circuit), and the pressure 2 is equipped with a circuit for receiving the transmitted digital data.
y; a counter for determining the acceptability of the received digital data by receiving the control 'll lsi 'j from the flilJ control circuit and counting the number of pulses; 1. A digital protection relay device comprising: a calculation means shown in stripe 2 for inputting digital data and performing back-up protection calculations for an electric power system. (3) A first device that introduces a plurality of ゛1■ airs J-1 from a plurality of power systems and performs life protection calculations for each power system, and a second device that performs backup protection calculations, respectively. In a digital protective relay device, the device includes a duplex converting means for converting a plurality of input electric quantities into digital codes, and a converting means for converting a plurality of input electric quantities into digital codes, and inputting each of the transformed digital data and converting it into a power system. A Jl calculation means for performing life insurance d calculations, a plurality of transmission means for transmitting digital data converted for backup protection calculations, and a control circuit for providing control (ill signal) to each means. In addition, the 1/2 device includes a plurality of receiving means for receiving the transmitted digital data, and a receiving means for receiving the 1IIIJ control signal from the control circuit and counting the Noculus number to receive the received digital data. A digital protection device characterized by comprising: a counter for determining the quality of data; and a second calculation means for performing back-up protection calculations for the power system by switching and inputting digital data received according to the judgment results. Relay device・□'11゜(4) + Akatsuki number of >a from the power system, air-h (all,...!? At most each '11 (dl to perform the main protection poem about the power system) In the digital protection relay device, which has a device 1 and a second device 1' that performs backup protection calculations, respectively, -c, yg.
The device No. 1 includes a converting means for converting only a plurality of input currents into digital data, and inputs the converted digital data and converts it into a life insurance class diagram of the -C power system R: 'r: (r now the first It comprises a calculation means, a means for transmitting the converted digital data for back-up protection calculation, and an open-side circuit for giving control signals to each means, and
The device includes a plurality of receiving means for receiving transmitted digital data, and receiving +l1lJ control signals from a control circuit. A counter that determines the quality of received digital data by counting the number of pulses, a synchronization circuit that receives the sampling signal from the il/ll 1uI11 circuit described above, and a synchronization signal that introduces voltage from the power system. a converting means for converting the input voltage into a digital code in synchronization with the above, and a second operation for inputting each of the digital data and performing the power system back-up maintenance operation X↓
Digicuru Hou 1〆', which is characterized by having 7 means! 1α device 1t0 (ri) From multiple power systems? In a digital protective relay device that introduces the amount of electricity due to iE failure and performs life insurance &m "ri"C for each power system, and a second device that performs back-up protection calculations, 1shi1
The Pig (Oka) includes a converting means for converting a plurality of inputs into digital data, and inputs the converted digital data to perform life insurance calculations for the electric power system. means, and the converted digital data is temporarily transmitted using a cyclic digital a't GM transmission method.
It is equipped with a transmission means for transmitting the J control signal and a +BIJ7+Q1 circuit for each means, and the second setup is for transmitting frames 41 and I. The transmission data network is equipped with a receiving means for receiving the transmission data of the configuration and determining the quality of the received data, and a calculating means for inputting the transmission boolean and performing back-up protection calculations for the power system. ``fN'' A device for digital homing that is used as a signal to stop feeding and send out an alarm signal.