JPH01202121A - Power system monitoring 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] [Object of the Invention] (Industrial Application Field) The present invention is a power system monitoring device, in particular, a power system monitoring device that monitors the power system status while constantly inputting information, and detects when an accident occurs in the power system. The present invention relates to a power system monitoring device that outputs that information as an alarm when the event occurs.

(Prior Art) A power system monitoring device has the role of presenting a wide variety of alarm information occurring in a power system to an operator as accurately and completely as possible.

FIG. 8 is a diagram showing an example of a conventional power system monitoring device, and the conventional system will be explained using this diagram. In Fig. 8, 1 is the power system, 2 is a transmitting station for transmitting alarm information of the power system, 3 is a receiving station that receives information from the transmitting station, and 4 is a receiving station that receives information from the receiving station. , an electronic computer that outputs this to a CRT or a printer (hereinafter referred to as ■).

5.6.7 is a device constituting an electronic computer; 5 is a database for storing information received from the receiving station 3;
6 is a power system diagram display mechanism that displays a power system diagram on a CRT based on the information stored in the database, and displays there the on/off status of the switch and the start/stop status of the generator;
Reference numeral 7 indicates an alarm information printing mechanism that prints a predetermined message on the TWG with the time of a clock built into the computer based on information stored in the database.

FIG. 9 is a flowchart illustrating the operating principle of the electronic computer 4, and has four steps consisting of steps 891 to S94.

In step S91, power system information is constantly input from the receiving station. In step 892, the new and old information is compared, and if there is a change, step S93 is executed. In step 893, the time at which the occurrence of the change was detected is read from the computer's built-in clock, and a message prepared in advance for the information on which the change occurred is retrieved from the database, and both are output as a pair to TlJ4. do.

In step S94, the power system diagram is displayed, and the on/off states of the switches and the running/stopping states of the generators displayed there are distinguished by symbol shapes and colors and displayed on the CRT.

Figure 10 is an example of a power system diagram displayed on a CRT.
S/S, CS/S, OS/S, HS/S are Odai A substation, C substation, C substation, H substation, B P/
S.

D P/S, E P/S, and F P/S indicate Odai B Power Plant, D Power Plant, E Power Plant, and F Power Plant.

S, AF- and AF-2L, Ftl- and FH-2L,
CE-L indicates a power transmission line, CB1 to CB22 indicate a circuit breaker, and ■ to indicates a generator, and the states of the circuit breaker and generator are distinguished and displayed as shown below.

Circuit breaker ON status Red 0 Circuit breaker OFF status White X Generator operating status Red 0 Generator stopped status White 0 Figure 11 is an example of the message printed on T14, and these are as follows. It has the meaning shown.

Numbers shown in the first column 15:35:11,...15
:43:44 indicates the time when each alarm information reached the computer system and was saved in the F P/S shown in the next column.
, G S/S,...B P/S is the power plant name or substation base, and the OVG, C60,...
...No. 2 G is the equipment name of each electrical station shown in Figure 10,
TR1P, disconnection, . . . stop shown in the last column indicate the status of the above-mentioned equipment.

Note that HREC and 14REc mean that high-speed reclosing success and medium-speed reclosing success were carried out on-site using local equipment, respectively.

In other words, 15:35:11 F P/S OVG shown on line 0 means that the overvoltage relay was activated at power plant F at 15:35:11, and 15: shown on line ■ 35: 13B P/S C60TR
1P means that breaker 3 was turned off at power plant B at 15:35:13.

The 15:35:13 B P/S No. 1 G sequence shown in row 0 is
15:35:13 F P/S CB12 H Line 0 indicates that the No. 1 generator was disconnected from the power grid at Power Plant B at 15:35:13.
REC indicated on line 0 that breaker 12 was recirculated at high speed at F power plant at 15:35:13.15:35:17 CS/S C60TR1P
Line 0 indicates that circuit breaker 7 was disconnected at 15:35:17 at substation C at 15:36:13. 15: 36: 13 C, S/S C60 on line 0 indicates that at power plant B at 15:36:13 C, S/S C60
IN HREC reported that at 15:36:13 at C substation, breaker 7 was disconnected due to medium speed reclosing. means that the No. 3 generator stopped at power plant D at 15:43:40.

The examples shown in Figures 10 and 11 are examples of power transmission, lA [
-■ and 8F-2[ were struck by lightning, A S/S,
Fp/S successfully rerouted at high altitude, B P/S, CS
/S shows that the generator is disconnected due to the lack of a high-speed reclosing device and the generator is stopped.

(Problem M to be solved by the invention) Even in the case of the above-mentioned small-scale system: When a failure occurs, a large number of messages are output at once, and it can be seen that it is difficult to select important information from among them.

Furthermore, the time of the lightning strike was 15:35:11, the time when OVG was operating, but A S/S, B P
/S.

The times when the respective circuit breakers for c S/S and F P/S operated were 15:35:17.15:35:13.15:
35:13, which is slightly different.

There are two reasons for this.

First of all, since each piece of information is sent to the computer system via different transmission paths, the times at which the information reaches the computer system are different.

Second, computer systems process arriving information serially, so when a large amount of information arrives at the same time, the first and last processing times are different, and ■- occurs at different times. This is due to the fact that the information is output as if it were the actual information.

Therefore, in Fig. 11, for example, the message that should originally be printed on the 6th line ■ 15:35:14 HS/5Ov
A phenomenon occurs in which G is printed in 10 rows 10.

The system shown in Figure 10 is a small-scale system shown as an example, but when it becomes a large-scale system, the system shown in Figure 11
00 times as many messages are output, and it is extremely difficult to pick out important messages from among them.

The present invention has been made to solve the above problems, and prevents the printing order from being disturbed due to the transmission time difference of the transmission line.
It is an object of the present invention to provide a power system monitoring device that allows an operator to intuitively feel the physical meaning of alarm information.

[Structure of the Invention] (Means for Solving the Problems) The present invention will be explained using FIG. 1 corresponding to an embodiment.
In a power system monitoring device, there is a database 105 into which information indicating the operation of protective relays and on/off of switches is input and stored together with equipment information that constitutes the power system, and when the information in the database changes state, the change means 107 for detecting the time and state after the change and associating alarm information with the relevant equipment; and means for adjusting so that each of the associated alarm information is displayed near the relevant equipment in the power system diagram. 106, and means 8 for displaying the adjusted power system diagram.

(Function) Operation of protective relays, status information of switches, and information on equipment configuring the power system from the power system are stored in the database 105.
is entered and saved.

Alarm information generated in the power system due to the occurrence of an accident is processed and distributed to related equipment by means 107 for associating alarm information with related equipment, and each distributed alarm information is processed by means 106 for associating alarm information with related equipment. Accordingly, the information is arranged in chronological order near the related equipment on the power system diagram and displayed on the display means 8.

(Example) ' Examples will be described below with reference to the drawings.

FIG. 1 is a functional block diagram of an embodiment of a power system monitoring device according to the present invention, and the reference numerals in the figure correspond to those in FIG. 8.

In FIG. 1, a computer 104 has a database 105 that stores power system equipment data including state information of the power system 1, detects changes in the state information of the power system 1, prompts for this as alarm information, and detects changes in the state information of the power system 1. A mechanism 107 for associating alarm information with related equipment, which detects the time and state after the change, and further associates the alarm information with related equipment in the power system equipment, symbols of equipment constituting the power system, and each of the equipment. A power system diagram that displays the connection status between the equipment, the on/off status of the equipment, and the alarm information associated with the equipment by the above-mentioned 107 as a power system diagram.
□Display mechanism 106.

The other configuration is the same as that shown in FIG. 8 as a conventional example.

FIG. 2 is a flowchart showing specific processing contents of the computer. In FIG. 2, step S91.89
2 and 894 are similar to those shown in FIG.

First, in step 392, if there is no difference between the input new and old information, the process returns to step 891 and waits for a difference to occur. If a change is recognized in step S92, the processes from step S94 onwards are performed.

Next, a case where a change in the newness of the information is recognized in step S92 will be described using two specific examples.

Note that FIG. 3 shows the alarm information shown in FIG.
The results displayed on T are shown.

As can be seen from the display example in Figure 3, if an accident occurs in the power system, each electric station belonging to the power system will
The name of the equipment that operated and the details of the operation are displayed over time.

The description inside the frame in FIG. 3 is the display content, and these are clearly displayed near each electric station.

Each side will be explained below with reference to FIG.

■B 15:35:13C near P/S
Example where B3 TR1P is displayed: As described above, this example is a case in which the CB3 was turned off at 15:35:13 and the information was input to the computer 104.

In this case, in step 894, the equipment symbol CB3 on the power system diagram is changed to a shape that means off, for example, as described above.
Change it to an X and display it.

In step 321, the time 15:35:13 was read from the clock device installed inside the computer and saved, and in step S22, the rCB3 given from receiving station 3 was turned off by the local device. This information is stored in correspondence with the B P/S.

Next, in step S23, the above-mentioned step S21.8
The data saved in step 22 is displayed near the relevant electric station on the power system diagram.

An example of this display is shown in Figure 3.
"15235:13CB3" displayed near the
The alarm information is "TR1P".

In addition, in step S22, there is a facility called CB3 in the information given from the receiving station 3, and that facility is BP/
I am aware that it is installed in S.

For this recognition, in the database 105,
CB3 has information that it is installed in BP/S.

FIG. 4 shows the configuration of the database 105.

In FIG. 4, for example (A S/S CBI C
B2) indicates that CBI and CB2 are installed in A S/S, (B P/S CB3 CB4 CB5 CB
6 No. 1 No. 02 G), B P/S has CB3, CB4, CB5, CB□,
This shows that No. 1 No. 012 G is installed.

@15 near F P/S, GS/S, HS/S
:35:110VG, 15:35:ii OV
G, 15:35:140VG This example shows three power generation/substations (F P/S, G S/
S.

The ground fault overvoltage relay OVG installed in
This is a case where information indicating that the actuation occurred at different times, 5:35:11 and 15:35:14, is input to the computer 104. As mentioned above, this phenomenon occurs due to differences in transmission path delays even if the actual OVGs operate simultaneously.

Therefore, when this type of input is received, in step S94, since the corresponding power system diagram symbol does not exist, nothing is done, and the process of the next step 821 is executed.

In step S21, the F P/S is 15:35:1.
1, save 15:35:11 for GS/S and 15:35:14 for HS/S, respectively.

Step S22 The OVG information for P/S is F.
The OVG information for G S/S is in P/S,
0■G information for XH8/S is stored in association with HS/S.

In step S23, the F P/S displayed on the power system diagram
, GS/S, HS/S as shown in Figure 3, 15: 35: 11 0VG, 15: 35
: 11 0VG.

15: 35: 14 Displays alarm information of 0VG.

Next, a description will be given of how alarm information is displayed near each facility in the power system diagram.

FIG. 5 shows a CRT screen, and this case will be described as an example of a BP/S display. The frame in the figure is the outer frame of the CRT screen, and when displaying the BP/S inside this frame, the coordinates are determined with point a as the origin. As shown in FIG. 6, the coordinates of B P/S are shown in advance.

In the figure, (B P/S (X 80) (Y
25)) indicates that the X coordinate of B P/S is 80 with respect to the origin, and the Ya mark is also <25.

Therefore, as shown in FIG. 5, the position at distance IX, Y from the origin (a) is determined as the position of B P/S.

Next, the coordinates of the window for displaying the message are shown in the second column of FIG. This is based on the two points in Figure 5, and these seven points are B P/S.
It can be determined based on the coordinates of

(BP/S window (χ1-30> (V120
)(χ2 50) (V2 5xn)), of which (χ1-30) indicates the X-axis relative value from the BP/S coordinates of the two points, and (V, 20) indicates the relative value of the X-axis from the BP/S coordinates of the 7 points.
The Y-axis relative value from the S coordinate is shown.

(χ250) indicates the horizontal length of the window, (V
2 5 x n) indicates the vertical length of the window. however,
n is a value corresponding to the number of messages.

FIG. 7 is a flowchart showing the process of creating a frame for message display, which is performed by the power system diagram display mechanism.

In step S71, the information on the occurrence of a change saved in step S22 in FIG.・Enter the coordinates on the CRT of the substation).

In the case of B P/S, enter that the origin is the upper left of CIIT, and the X axis is 80 and the Y axis is 25.

In step 873, the coordinates of the upper left corner of the window displaying alarm information are input.

In the case of B P/S, calculate the coordinates of the two upper left points of the window as shown below and input them.

2 points X-axis = 80-30 = 50 2 points Y-axis = 25 + 20 = 45 In the status 874, the vertical and horizontal sizes of the window are determined. In the case of B P/S, if the number of pieces of information input in step S71 is 10, then the above (V2 5xn
) to find the vertical size using 5X10=50.

For the horizontal and vertical sizes, enter the value 50 from the above-mentioned (χ250). In step S75, the saved correspondence information is displayed.

As described above, power system information can be displayed chronologically in the vicinity of the relevant equipment.

According to the above embodiment, the alarm information is organized and displayed near each piece of equipment, and is displayed in a form that is easy for the operator to intuitively understand.

Furthermore, even though alarm information that occurs simultaneously at different points may be input to the computer at different times depending on the degree of delay in the transmission path, this information is organized in chronological order for each piece of equipment, making it easy to view the information side-by-side. That's ideal, for example GfF P
/8 15:35:11 0VG and 15 of HS/S:
35: 14 0VG will not be understood by the operator as a different time, and the problem can be virtually eliminated.

[Effects of the Invention] As explained above, according to the present invention, power system information is displayed in chronological order (.502) in the vicinity of each piece of equipment constituting the power system. 7. Messages are organized and displayed in a format that is easy for operators to intuitively understand, making monitoring operations easier.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of an embodiment of the power system monitoring device according to the present invention, FIG. 2 is a flowchart showing the processing contents of the power system, and FIG. 3 is a power system diagram displayed on a CRT together with an alarm message. FIG. 4 is a side view of the database configuration, and FIG. 5 is a diagram explaining how to form a frame for displaying alarm messages on a CRT.
Figure 6 is a side view of the configuration of the coordinates of the frame of each electric station for displaying alarm messages, Figure 7 is a flowchart showing the processing content when creating the frame, and Figure 8 is a conventional power system monitoring device. 9 is a flowchart showing the processing contents of a conventional computer, and FIG. 10 is a diagram showing the configuration of C.
The power system diagram displayed on the RT, FIG. 11, is an example of outputting a message to the printer. ■... Power system 2... Transmitting station 3...
・Receiving station 104...electronic computer 10
5...Database 106...Power system diagram display mechanism 107...Mechanism for associating alarm information with related equipment 8...CRT Fig. 1 Fig. 2 ■ (4% C3I CB, 2) ■ ( DF/s
No. 3 G) ■ (EP15 Ca1l No. 4 G) ■ (FP/
) calz CE313 CaI2 CB+5 Cf
316CBI7CI31B Fig. 5 (BP/s (X 80 ) (Y25 ) ) BP1
5 window (Eng, -30) (II+zo) (Eng 2
50) (LJ25X) Fig. 6 Fig. 7■ +5:35:II FF/s, 'OVG■ +
5:35:+! GS/S ○VG■ 15:35
:13 8F/S C83TR1P ■ 15:35
:+3 8 +15 C84TR1P■ +5:36
:+3 BI No. 151 G disassembly ■ 15:35
:13 88', 2ug M row ■ 15:
35:+3 FI/, C812HRE
C■ 15:35°13 F P/s CB13
HREC ■ 15:35: +3 EP/s No. 4 GM column ■ 15:35:14 ) (S/s OVG
@15:3517 AS/5C81HREC@
)5:35:17 AS/; CB2
H-shaku EC @ 15:35:+7 DP15 3
% Separation @ 15:35: 17 Cs/s
C8'7 TR1P■ 15°35:17 CS/
5CB8 TRiρ■ 15:36:+3
B F/s C83IN local @ 15:36:+
3 BP/s Akira 4 1NXIM ■ 75:36
°13 C3/s C8'7 IN M
REC■ 16:43:40 0P'5 3
No. G I-tei-stop ■ 15:43:40 EP/s
No. 4 Q I Yodome @ 15:43:44
8P/S I-Q I-tei stop @ +5:43
:44 8P/S 2'YG I-stop Figure 11

Claims (1)

[Claims] Information indicating the operation of protective relays and the on/off state of switches is used in power system monitoring equipment that constantly collects power system information through transmission lines and uses that information to determine and display faulty equipment in the power system. When the state of the information in the database changes, the time of the change and the state after the change are detected and the alarm information is associated with the equipment. a means for adjusting the associated alarm information to be displayed near the corresponding equipment on a power system diagram; and a means for displaying the adjusted power system diagram. Grid monitoring device.