JPH0421320A - Power system supervisory system - Google Patents

Abstract

PURPOSE:To improve reliability by comparing connection discriminating process based on ON/OFF information of a switch with a connection discriminating process based on numerical value information, and warning a malfunction position if there is an inconsistent position. CONSTITUTION:ON/OFF information of a switch, etc., sent from a power station measuring device 1 through an information transmitter 9 is fetched to an ON/OFF information receiving processor 31, a connecting state of a transmission line, a transformer, etc., is discriminated by a connection discriminating processor 51, and the result is stored in a system information storage unit 61. On the other hand, numerical value information sent from the device 1 through the transmitter 9 is fetched to a numerical value information receiving processor 32. A connection discriminating processor 52 decides the connecting state of the line, the transformer, etc., in which its power flow is not zero as ON, decides them in which its power flow is zero as OFF, and stores it in a system information storage unit 62. The two system informations are checked for matching by a power system information malfunction detecting processor 53 to detect the malfunction of the power system information, to judge the power state measuring device in which a malfunction occurs, and to inform the malfunction to an operator.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a power system monitoring system.

(Prior Art) A computer system that monitors and controls a power system (hereinafter referred to as a power system computer system) calculates the system state using a power state measuring device (for example, a transformer, etc.).
System monitoring is performed using power system information transmitted by an information transmission device, but error processing is performed only on information transmitted as an information error among this power system information.

However, not all abnormality information is necessarily transmitted as an information error, such as when the power state measuring device itself is abnormal.

(Problems to be Solved by the Invention) With the expansion and complexity of today's power systems, there is a demand for improved reliability of the entire power system computer system. Improving the reliability of the computer system's hardware and programs is not enough to improve the reliability of the computer system; the reliability of the information used in the computer system also needs to be improved.
We need to improve at the same time.

With recent improvements in information transmission technology, it has become possible to transmit large amounts of information, and as a result, the amount of information that can be used in power system computer systems has increased.

The present invention detects an abnormality in the power system information by performing a consistency check on the power system information that has been sent as normal, and if there is abnormality information, the power status measurement system measures the information. The purpose is to provide a reliable power system monitoring method by notifying the operator of the occurrence of equipment failure and removing the abnormality information.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the present invention provides a power system computer system that includes a processing unit that receives power system information from a power status measuring device, and a switch. A processing unit that determines connection to the power grid based on on/off information and a processing unit that determines connection to the power grid based on numerical information, and the results of these two connection determinations are compared to detect discrepancies. A processing unit that detects the location and detects #regularity in power system information by checking the consistency of the detected location and complements or removes #lightning information, and a power status needle i11 in which the failure occurred based on the abnormality information. It consists of a processing unit that determines the equipment and notifies the operator.

(Function) When comparing the connection determination process based on switch on/off information sent from power system measuring equipment with the connection determination process based on numerical information, there are some discrepancies. This system is designed to provide an alarm when an abnormality occurs, and to improve the reliability of functions such as an operation control function and a power supply recording function that use power system information from a power status measuring device.

(solid line example) Examples will be described below with reference to the drawings.

FIG. 1 is a functional block configuration diagram of an embodiment for explaining a power system computer system using the present invention.

In FIG. 1, 1 is a power status measuring device, 2 is a power system computer system, 3 is a power system information receiving function, 4 is a power system reception information storage unit, 5 is a system monitoring function, 6 is a system information storage unit, 7 is an operation control function, 8 is a power supply recording function, and 9 is an information transmission device.

Power system information required in the power system computer system 2 is collected by the power status measuring device 1 and transmitted to the power system computer system 2 via the information transmission device 9. In the power system computer system 2, after the power system information receiving function 3 performs reception processing, the information is stored in the power system received information storage section 4. In grid monitoring function 5,
Grid information is created based on the information in the power grid reception information storage section 4 and stored in the grid information storage section 6. Functions such as the operation control function 7 and the power supply recording function 8 perform their respective processes based on the information in the system information storage section 6.

In FIG. 2, the power system information receiving function 3 and
Details of the power system reception information storage section 4, system monitoring function 5, and system information storage section 6 are described.

In the power system computer system 2, the power system information sent from each power state measuring device 1 via the information transmission device 9 is processed by dividing it into on/off information and numerical information.

First, the on/off information of the switch, etc. sent from the power status measuring device 1 via the information transmission device 9 is taken in by the on/off information receiving process 31, and then sent to the connection determination process 51 based on the on/off information. Then, the connection status of power transmission lines, transformers, etc. is determined, and the result is stored in the system information storage unit 61 based on on/off information.

Connection determination processing 51 based on on/off information will be explained using the power transmission line B1 shown in FIG. 3 as an example. One end of the power transmission [81] is connected to the double bus line N1. The other end of the bus bar N2 is connected to a breaker CB2 and a disconnector [S3. By the disconnector 134, the bus bar 83 of the double bus bar
．． Connected to bus line N4. When at least one of the circuit breakers CB1 and CB2 is off, the connection state of the power transmission line 81 is determined to be off regardless of the state of the disconnector. When both circuit breaker CB1 and circuit breaker CB2 are on, the circuit breaker LSI and circuit breaker LS2 are both on.
is off or both disconnector LS3 and disconnector LS4 are off, regardless of the state of the disconnector at the other end, the power transmission I
I1. The connection state of B1 is determined to be off. When the circuit breaker or disconnector is in a state other than these, the connection state of the power transmission line B1 is determined to be on.

On the other hand, the numerical information sent from each power status measuring device 1 via the information transmission device 9 is taken in by the numerical information receiving process 32, and the connection determination process 52 based on the numerical information is performed to determine whether the power flow is not zero on the power transmission line. The connected status of a power transmission line or transformer with zero current is determined to be on, and the connected status of a power transmission line or transformer with zero current is determined to be off. The result of connection determination based on this numerical information is stored in the system information storage section 62 based on numerical information.

These two pieces of system information are checked in the power system information abnormality detection process 53 to detect an abnormality in the power system information, and stored in the abnormal power system information storage section 64. Based on the information in the information storage section 64, the power state measuring device in which the abnormality has occurred is determined, and the occurrence of the abnormality is notified to the operator.

At the same time, in the power system information abnormality detection process 53, abnormality information is supplemented if possible, and stored in the system information complementary data storage section 63. In functions such as the operation control function 7 and the power supply recording function 8, in addition to the information in the grid information storage unit 61 based on on/off information and the grid information storage unit 62 based on numerical information, the abnormal power system information storage unit 64 and grid information supplementary data are stored. Each process is performed using the information in the storage unit 63.

Details of the power system information abnormality detection process 53 will be described in FIG.

In the power system information abnormality detection process 53, the on/off connection status of power transmission lines and transformers is determined using the information in the power system information storage unit 61 based on on/off information and the information in the grid information storage unit 62 based on numerical information. Compare the off state (step si>).

As a result of the comparison, if there are power transmission lines or transformers whose connection states do not match, proceed to the next step S4, and if the connection states of all power transmission lines or transformers match, this process ends (step S2> .

If there are transmission lines or transformers whose connection status does not match, check whether Kirchhoff's law can be applied to the bus to which the transmission line or transformer connects by adding information about the connection information that does not match or , a check is made to see if there is any power system information that has already become abnormal when it is transmitted from the power state measuring device 1 (step 33).

In step S3, the power transmission lines whose connection states do not match
If it is determined that Kirchhoff's law can be applied to the busbar to which the transformer is connected, it is assumed that the numerical information is true and it is checked whether the law holds true (step 84).

When Kirchhoff's law is established when the numerical information is true (step S5), it can be determined that the on/off information is abnormal, so the information on the on/off information abnormality is stored in the abnormal power system information storage unit 64. At the same time, the on/off information is complemented, and the complemented value is stored in the system information complemented data storage section 63.

If the power transmission line or transformer is determined to be on based on the numerical information, the switch connected to the power transmission line or transformer that is off is determined to be abnormal, and the complementary value is set to on. In addition, if numerical information determines that a power transmission line or transformer is on, the switch connected to that power line or transformer that is on is considered to be abnormal, and these switches are supplemented. The value is set to OFF (step S6).

In step S5, if Kirchhoff's law does not hold when the numerical information is true, the numerical information is determined to be abnormal, and a complementary value for the numerical information is determined. When the connection state of a transmission line or transformer is on based on the system information based on on/off information, the power transmission line or transformer is assumed to be on, and by using Kirchhoff's law, the complementary value of the numerical information is obtained, and , when the connection state of the power transmission line or transformer is off according to the system information based on the on/off information, the complementary value of the numerical information is set to zero (step S7).

Using the complementary value of the numerical information obtained in step S7, it is determined again whether Kirchhoff's law holds. When Kirchhoff's law is established, the numerical information abnormality information is stored in the abnormal power system information storage unit 64, and the complementary value is stored in the system information complementary data storage unit 63 (step 88).

If it is determined in step S3 that Kirchhoff's law cannot be applied, or if it is determined that Kirchhoff's law cannot be established in step s8, both the on/off information and the numerical information are treated as abnormal. The determination is made and the information is stored in the abnormal power system information storage unit 64. At this time, the abnormality information is not supplemented (step 510).

From step S3 to step S10, the on/off
If the off information or numerical information is determined to be abnormal,
Abnormal power system information storage unit 6 via abnormality notification means 54
The occurrence of an abnormality in the power status measuring device 1 that has measured the abnormal power system information is notified based on the information of No. 4 (step 511).

From step S3 to step S11, processing is performed for each power transmission line or transformer whose connection state does not match.

A specific example will be shown using FIG.

The power transmission line B2 has a breaker CB3 and a disconnector [S5. Disconnector 1
86, the power transmission line 83 is connected to the breaker CB4 and the disconnector [S
7. Power transmission line B4 is connected to breaker CB6 by disconnector LS8.
and disconnector LS11. Disconnector [S12 causes the transformer Tr
1 is the breaker CBS and the disconnector [S9. The disconnector [S10 connects to the double bus f line N5 and the bus N6.

Information sent from the power status measuring device 1 via the information transmission device 9 indicates whether the breaker CBS is off or the breaker C is off.
B4 is on, breaker CB6 is on 2. breaker CBS
is on, disconnector LS5 is on, disconnector [86 is on, disconnector 137 is on, disconnector 188 is off, disconnector 131
1 is off, disconnector [S12 is on, disconnector LS9 is on, disconnector [S10 is on, power flow value of power transmission line B2 (P
l) is non-zero, the power flow value (P3) of power transmission @93 is non-zero, the power flow value (P4) of power transmission line B4 is non-zero, and the power flow value (Pl) of transformer Tr1 is non-zero.

In this system state, as a result of the connection determination processing 51 based on on/off information, the connection state of power transmission line B2 is OFF, the connection state of power transmission line B3 is ON, the connection state of power transmission line B4 is ON, and the connection state of transformer Tr1 is Information indicating that the connection state is on is stored in the system information storage g67 based on on/off information. As a result of the connection determination process 52 based on numerical information, the information that the connection state of the power transmission line B2 is on, the connection state of the power transmission line 83 is on, the connection state of the power transmission line B4 is on, and the connection state of the transformer 1r1 is on, The numerical information is stored in the system information storage unit 62.

In the power system information abnormality detection process 53, step S
1 and step S2! f: 1 if there is a transmission line B2 as a transmission line or transformer whose connection status does not match! I! Then, the process from step S3 onwards is performed. In step S3, all the power flow values of the power transmission lines and transformers connected to the bus N5 and bus N6 are measured, and
Since there is no power transmission line/transformer whose connection state does not match in the transformer other than power transmission line B2, it is determined that Kill Hoff's law can be applied, and the process proceeds to step S4.

In steps S4 and S5, assuming that the power flow value P2 is true and the on/off information is false as the connection state of the power transmission line B2, the sum of the power flow values flowing into the bus N5 and the bus N6,
That is, when the sum of the power flow value P2 of the power transmission line B2, the power flow value P3 of the power transmission line B3, the power flow value P4 of the power transmission line 84, and the power flow value P1 of the transformer Tri is zero, it is determined that there is a kill and Hoff's law is established. , it is judged that Kirchhoff's law does not hold when the sum or non-zero.

If it is determined that Kirchho-Soff's law holds, the process of step S6 is executed, the on/off information of breaker CB3 is set as an error, and the value of breaker CB3 is turned on and complemented, and then in step S11, breaker CB3 is turned on. Notify the operator that an error has occurred in the on/off information.

If it is determined that Kirchhoff's law does not hold, then in step S7, it is assumed that the TIfr device C83 is in an OFF state, and the complementary value of the power flow value P2 of the power transmission line B2 is set to zero.

In step S8, using this complementary value, it is determined whether Kirchhoff's law is satisfied based on the sum of the tidal current values flowing into the bus line N5 and the bus line N6, as in step S2.

If it is determined that Kirchhoff's law holds true, the power flow value P2 of the power transmission line B2 is set as an error, the value of the power flow value P2 is zeroed and complemented, and then in step S10, an error occurs in the power flow value P2 of the power transmission line B2. Notify the operator of this. or,
If it is determined in step S8 that Kirchhoff's law does not hold, the power flow value P2 of the power transmission line B2 and the breaker CB
Both ON/OFF information of S are determined to be errors.

Power flow value P2 of breaker CB3 or power transmission line B2 determined in step S6, step S9, and step S10
The error is stored in the abnormal power system information storage section 64, and the supplemented value is stored in the system information supplementary data storage section 63. However, if it is determined in step S8 that Kirchhoff's law does not hold, the data of the power flow value P2 of the circuit breaker CB3 or the power transmission line B2 is not supplemented.

The operation control function 7 and the power supply recording function 8 are provided by the circuit breaker CB3.
Alternatively, the information that the power flow value P2 of the power transmission line B2 is in error is retrieved from the abnormal power system information storage unit 64, and complementary data for the error information is stored in the system information complementary data storage unit 63, using the information stored in the system information complementary data storage unit 63. Perform each process.

[Effects of the Invention] As explained above, according to the present invention, since a consistency check is also performed on information transmitted as normal information from the power status measuring device 1, abnormalities in the power status needle IAJis device itself, etc. This makes it possible to detect abnormality information that has been transmitted as normal information to the power system computer system. Along with this, the following effects are achieved.

■ Since the reliability of the power grid information from the power status measuring equipment used in the power grid computer system will improve, the reliability of the system's operation control function and power supply recording function will also improve at the same time.

■ By promptly detecting anomalies in power system information that could not be detected conventionally, such as abnormalities in the power status measuring equipment itself, and notifying operators and responding, systems other than power system computer systems incorporating the present invention can When using information from a power status measuring device where an abnormality has occurred,
By notifying the system of abnormalities in power status measuring equipment automatically or via the operator,
The reliability of the system can also be improved at the same time.

[Brief explanation of drawings]

Fig. 1 is a functional block diagram of an embodiment for explaining a power grid computer system using the present invention, Fig. 2 is a detailed diagram of the power grid information receiving function and grid monitoring function in the embodiment, and Fig. 3 4 is a processing flow diagram of power system information abnormality detection processing, and FIG. 5 is an example of a power system. ■...Power status measuring equipment 2...Power grid computer system 3...Power grid information receiving function 4...Power grid reception information storage section 5...System monitoring function 6...Grid information storage Part 7
...Operation control function 8...Power supply recording function 9...
- Information transmission device 31...On/off information reception processing 32...-Numeric information reception processing 51...Connection determination processing based on on/off information 52...
・Connection determination processing 53 based on numerical information...Power grid information abnormality detection processing 54...Abnormality notification means 61...System information storage unit 62 based on on/off information
... Numerical information grid information storage unit 63... Grid information supplementary data storage unit 64... Abnormal power system information storage unit

Claims (1)

[Claims] In a computer system that monitors on/off information and numerical information from the power system online and performs operation control using this information, it is possible to monitor the power system using the on/off information of power system switches. A connection determination process and a power system connection determination process using numerical information are performed.
A power system monitoring method characterized by determining whether or not there is an abnormality in a power system state measuring device based on the results of two connection determination processes, notifying an operator when there is an abnormality, and supplementing abnormality information.