JP3357720B2 - Instantaneous Voltage Drop Relay-like Change Detection Method for Power System Computer System - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instantaneous voltage drop relay (hereinafter referred to as .DELTA.UVR) state change detection system for a power system computer system.

[0002]

2. Description of the Related Art In a general power system, when an accident occurs, an instantaneous voltage drop occurs over an extremely wide area from the accident point. When the ΔUVR installed on the bus operates for the purpose of accurately detecting this change and preventing the spread of an accident, the ΔUVR is input to the power system computer system as state change information. In addition, the ΔUVR state change at this time generally does not occur alone, but occurs in a plurality.

The power system computer system analyzes the input ΔUVR state change and records the range affected by the instantaneous voltage drop. The recording of the instantaneous voltage drop is performed each time the ΔUVR operation is performed. The operation of the ΔUVR includes the operation due to the instantaneous voltage drop and the malfunction (ΔUVR operation test, ΔUVR body failure, ΔUVR operation).
ΔU to the power system computer system when information transmission is abnormal
(Eg, data error at the time of VR state change input), and the ΔUVR state change due to the latter malfunction is unnecessary in the operation of the power system. If a ΔUVR erroneous change due to a malfunction occurs, the internal processing of the power system computer system for recording the instantaneous voltage drop is useless. During or after the process, there is a problem that the labor is wasted when it is found to be a ΔUVR erroneous change, and the response at the time of an actual accident is delayed because confirmation was made as to whether it was a ΔUVR erroneous change. there were.

[0004]

In the event of a power system accident, an instantaneous voltage drop occurs over a wide area within the equipment group to which the equipment in which the accident occurred belongs.
The purpose of the UVR is to provide an instantaneous voltage drop relay state change detection method for a computer system for a power system that uses a plurality of operations to eliminate the detection of a ΔUVR error state change.

[0005]

According to a first aspect of the present invention, an instantaneous voltage drop relay-like change detection system for a power system computer system operates according to an instantaneous voltage drop when an accident occurs in a power system. Based on the state change of the instantaneous voltage drop relay, in the power system computer system to determine whether the voltage drop is due to an actual accident in the power system,
Power system information input means for taking in instantaneous voltage drop relay information from the power system, and power system information input processing means for taking out information from the power system information input means and transferring the information to the instantaneous voltage drop relay operation number determination processing means for activation, And the number of detected instantaneous voltage drop relays that stores the number of operating instantaneous voltage drop detection relays, which serves as a reference for determining whether the voltage drop is due to an actual accident in the power system when an instantaneous voltage drop occurs. Setting data storage means, power system definition data storage means defining the connection relationship of each equipment group in the power system, instantaneous voltage drop relay information from the power system information input processing unit, and the number of detected voltage drop relays The set number information from the setting data storage means and the connection information from the power system definition data storage means are taken out, and each equipment group is extracted. And a momentary voltage drop relay operation number determination processing means for performing an instantaneous voltage drop process for.

According to a second aspect of the present invention, there is provided an instantaneous voltage drop relay-like change detection method for a power system computer system, wherein the instantaneous voltage drop detection relay operated in response to an instantaneous voltage drop when an accident occurs in a power system. In the power system computer system, which determines whether or not the voltage drop is due to an actual accident in the power system based on the state change of the power system, power system information that captures instantaneous voltage drop relay information and bus voltage values from the power system Input means, power system information input processing means for taking out information from the power system information input means, transferring the information to the bus voltage presence / absence determination processing means, and starting, and power system bus from the power system information input processing means A voltage data storage unit for storing a voltage value, and a power system definition data storage unit for storing data defining a connection relationship of each equipment group in the power system. Instantaneous voltage drop relay information from the power system information input processing unit, bus voltage information from the voltage data storage means, and connection information from the power system definition data storage means, and extract the instantaneous voltage drop for each equipment group. And a bus voltage presence / absence determination processing means for performing processing.

[0007]

In the power system computer system according to the first aspect of the present invention, the ΔUVR operation number determination processing determines the ΔUVR state variable number in the equipment group, and sets a predetermined ΔUVR state.
If the number is equal to or greater than the number of UVR detection determinations, the instantaneous voltage drop is recorded. In the computer system for a power system according to [Claim 2], the bus voltage presence / absence determination processing is performed by Δ
The bus voltage at the time of the instantaneous voltage drop taken together with the state change result of the UVR is determined, and the instantaneous voltage drop is recorded if it exceeds the operating voltage value of ΔUVR. The ΔUVR state change at this time is discarded. As a result, the records stored in the ΔUVR state change processing are accurate, and the load due to the execution of the ΔUVR state change processing when the computer is heavily loaded is not added, so that the power system computer system can be operated smoothly. In addition, there is no need for the power system computer system operator to determine the ΔUVR error.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the power system computer system according to [claim 1] of the present invention, means for judging from the number of ΔUVR-like variables in a facility group will be described below. FIG. 1 is a functional block diagram illustrating a ΔUVR state change detection method of a power system computer system according to the present invention, in which ΔUVR data from a power system 1 is transmitted to a power system information input device 3 via a transmission line 2, The state of input to the power system computer 4 is shown. In this case, the power system information input device 3 functions to extract the ΔUVR data of the power system 1 and activate the power system information input processing unit 41 in the power system computer 4. The power system information input processing section 41 converts the ΔUVR data of the power system 1 from the power system information input device 3 into ΔUV
A process of starting the delivery to the R operation number determination processing unit 42 is performed. The ΔUVR operation number determination processing unit 42 compares the ΔUVR data passed from the power system information input processing unit 41 with ΔUR data.
VR detection number setting data 43 and power system definition data 44
Each data is extracted from the data, an instantaneous voltage drop process as an internal process of the ΔUVR operation number determination processing unit 42 is executed as necessary, and a process of outputting a process result to the operator console 5 is performed. The operator console 5 also performs means for setting the ΔUVR detection number setting data 43. Here, the means for determining based on the number of ΔUVR operations in the equipment group will be described below.

[0009] As an initial value, information for judging from the number of ΔUVR operations when the electric power system is changed in the electric power system computer system is previously transmitted from the operator console 5 to the ΔUVR.
The detection number setting data 43 is set. The specific numerical value set in the ΔUVR detection number setting data 43 from the operator console 5 depends on the power system configuration.
Is set.

First, as an example of a ΔUVR erroneous change, the substation 1, the ΔUVR1, the ΔUVR4, the bus 1, the power plant 1, and the transmission line 1 of the substation 1, the substation 2, and the substation 3 shown in FIG. ΔUVR2, ΔUVR3, ΔUVR5, and ΔUV
R6, bus 2, bus 3, power plant 2, transmission line 2, transmission line 3
In a power system having a facility group 2 composed of
An embodiment in which ΔUVR2 is erroneously changed will be described with reference to the flowchart of FIG. However, ΔUVR incorrectly changed Δ
Since the equipment group 2 belongs to the UVR2, the equipment group 1 is out of scope.

At step S1 in the flowchart of FIG. 3, the process waits for a change in the state of ΔUVR, and if there is a change in the state of ΔUVR, the operation proceeds to step S2. Here, ΔUVR of FIG.
2 is the target. In step S2, the data input on the operator console 5 of FIG.
Is extracted from the ΔUVR detection number setting data 43 of FIG. In step S3, the power system definition data 44 in FIG. 1 is searched to determine which equipment group ΔUVR2 in FIG. 2 belongs to. Here, ΔUVR2 in FIG. 2 belongs to the equipment group 2. In step S4, loop control is performed to determine whether to detect instantaneous voltage drop for each equipment group obtained in step S3. Here, the loop processing is executed once for the equipment group in FIG. In step S5, ΔUVRs that have operated in each equipment group are searched and counted. Here, equipment group 2 in FIG.
ΔUVR operation is one. In step S6, the ΔUVR detection number setting data extracted in step S2 and the operation ΔUV in the equipment group obtained in step S5.
The number of R is compared, and if (the former ≦ the latter), step S7
Performs the instantaneous voltage drop processing, and does not perform the processing if (the former> the latter). Here, the former is 2 and the latter is 1, so that the instantaneous voltage drop processing in step S7 is not executed. In step S7, an instantaneous voltage lowering process is performed.

Next, as an example of an actual accident condition change, the substation 1, the ΔUVR1, the ΔUVR4, the bus 1, the power plant 1, and the transmission line 1 of the substation 1, the substation 2, and the substation 3 shown in FIG. ΔUVR2, ΔUVR3, ΔUVR5, and ΔUVR6
FIG. 4 shows a power system having a facility group 2 including a power line 2, a power line 2, a power line 2, a power line 2, and a power line 3.
A ground fault has occurred in the transmission line 3 connecting the substation 2 and the substation 3, and ΔUVR2, ΔUVR3, ΔUVR5, and ΔUVR6 belonging to the equipment groups 3 and 4 change state, and the circuit breaker 2 and the circuit breaker 3 Is open, the transmission line 3 is disconnected from the power system, and the substation 1 and ΔUVR
1, ΔUVR 4, bus 1, power plant 1, transmission line 1, substation 2, ΔUVR 2, ΔUV
Equipment group 3 consisting of R5, bus 2 and transmission line 2
An example of a case where the power system has an equipment group 4 including a substation 3, ΔUVR3, ΔUVR6, a bus 3, and a power plant 2 will be described with reference to the flowchart of FIG.
The equipment groups to which the above-mentioned ΔUVR changed in the ΔUVR state belongs are the equipment group 3 and the equipment group 4, and therefore the equipment group 1 is excluded.

At step S1 in the flowchart of FIG. 3, the process waits for a ΔUVR state change input, and if there is a ΔUVR state change input, the flow proceeds to step S2. Here, ΔUVR in FIG.
2, ΔUVR3, ΔUVR5, and ΔUVR6. In step S2, the data input on the operator console 5 in FIG. 1, that is, 2 is temporarily extracted from the ΔUVR detection number setting data in FIG. In step S3, the above 4
The power system definition data shown in FIG. 1 is searched for which equipment group each ΔUVR belongs to. At this time, ΔU in FIG.
VR2 and ΔUVR5 belong to equipment group 3, and ΔUVR
3 and ΔUVR6 belong to the equipment group 4. In step S4, a loop control is performed for each equipment group obtained in step S3 to determine whether to detect an instantaneous voltage drop. Here, the loop processing is executed twice for the equipment group 3 and the equipment group 4 in FIG.
In step S5, ΔU operated in each equipment group
VR is detected and counted. Here, the ΔUVR operation for the equipment group 3 in FIG. 4 is two, and the ΔUVR operation for the equipment group 4 is two. In step S6, the ΔUVR detection number setting data extracted in step S2 is compared with the number of operation ΔUVRs in the equipment group obtained in step S5, and if (the former ≦ the latter), step S7 instantaneous voltage drop processing is performed, and (the former) If the latter, do not perform. Here, for the equipment group 3 in FIG. 4, the former is 2 and the latter is 2, so the step S7 instantaneous voltage drop processing is executed. Execute the process. In step S7, an instantaneous voltage lowering process is performed.

In the power system computer system according to claim 2 of the present invention, the means for making a judgment based on the presence or absence of the bus voltage provided with ΔUVR will be described below.
FIG. 5 shows ΔUV of the power system computer system according to the present invention.
It is a functional block diagram explaining an R-shaped change detection system. FIG.
, 2 is a transmission line, ΔU from the power system 1
This is a means for transmitting the VR or bus voltage value to the power system information input device 3. In the power system information input device 3, the power system 1
Is a device that extracts the ΔUVR or bus voltage value of the above and starts the power system information input processing unit 41 in the power system computer. The power system information input processing unit 41 receives the ΔUVR or the bus voltage value of the power system 1 from the power system information input device 3 and stores it in the voltage data 46 of the bus voltage value data,
The ΔUVR data is a process of transferring the data to the bus voltage presence / absence determination process 45 and starting it. Reference numeral 46 denotes voltage data, which stores the bus voltage value taken into the power system computer 4 together with the state change result of ΔUVR when the instantaneous voltage drops. In the bus voltage presence or absence determination processing 45, the power system information input processing unit 41
From the ΔUVR data, the voltage data 46, and the power system definition data 44, and performs an instantaneous voltage drop process which is an internal process of the bus voltage presence / absence determination process 45 as necessary. This is a process for outputting the result of the process. Here, the operated ΔU
The means for determining based on the presence or absence of the bus voltage to which VR belongs will be described below.

First, as an example of ΔUVR erroneous change, an embodiment in which ΔUVR3 is erroneously changed in the power system of FIG. 2 will be described with reference to the flowchart of FIG. In step S11 of the flowchart of FIG. 6, the process waits for a change in the state of ΔUVR, and if there is a change in the state of ΔUVR, the flow proceeds to step S12. Here, the state change of ΔUVR3 in FIG. 2 is targeted. In step S12, the bus on which the erroneously changed ΔUVR3 is installed is searched for and extracted from the power system definition data 44 in FIG. Here, it is the bus 3 in FIG. In step S13, the voltage at the instantaneous voltage drop of the bus obtained in step S12 is extracted from the voltage data 46 in FIG. Here, assuming that no system fault has occurred, no instantaneous voltage drop has occurred, and the voltage at the instantaneous voltage drop is supposed to be 66 KV as a specified voltage value. The operating voltage of ΔUVR3 installed on the bus 3 in FIG. 2 is assumed to be 60 KV. In step S14, the voltage at the time of the instantaneous voltage drop extracted in step S13 is compared with the ΔUVR operating voltage. If (the former <the latter), the instantaneous voltage lowering process is performed in step S15, and if (the former ≧ the latter), it is not performed. Here, the former is 66 KV and the latter is 60 KV, so step S
15 Do not execute the instantaneous voltage drop process. In step S15, an instantaneous voltage lowering process is performed.

Next, as an example of an actual accident condition change, a substation 1 shown in FIG. 2, ΔUVR1, ΔUVR4, a bus 1, a power plant 1, and a transmission line 1, an equipment group 1, a substation 2 and a substation 3, ΔUVR2, ΔUVR3, ΔUVR5, and ΔUVR
In a power system having a facility group 2 composed of a power line 6, a bus 2, a bus 3, a power plant 2, a transmission line 2 and a transmission line 3, a power line 3 connecting the substation 2 and the substation 3 in FIG. Because of the occurrence of a power failure accident, ΔUVR2, ΔUVR3, ΔUVR5, and ΔUVR6 belonging to equipment group 3 and equipment group 4
And the circuit breaker 2 and the circuit breaker 3 are opened and the transmission line 3
Is disconnected from the power system. In this case, the substation 1, the ΔUVR1, the ΔUVR4, the bus 1, the power plant 1, and the equipment group 1 including the transmission line 1, the substation 2, and the ΔUV
An example of a power system having an equipment group 3 including R2, ΔUVR5, bus 2, and transmission line 2, and an equipment group 4 including substation 3, ΔUVR3, ΔUVR6, bus 3, and power plant 2. Will be described with reference to the flowchart of FIG.

In the flowchart of FIG. 6, ΔUVR2 and ΔUVR2
UVR3, ΔUVR5, and ΔUVR6 are operated. Hereinafter, the state change of ΔUVR2 will be described.
In step S11, a state change input of ΔUVR is waited for.
If there is a ΔUVR state change input, the process proceeds to step S12. Here, the state change of ΔUVR2 in FIG. 4 is targeted. In step S12, the bus on which ΔUVR2 is installed is searched for and extracted from the power system definition data 44 of FIG. here,
This is the bus 2 in FIG. In step S13, step S1
The voltage at the time of the instantaneous voltage drop of the bus obtained in 2 is taken out from the voltage data 46 in FIG. Here, assuming that a system fault has occurred, the instantaneous voltage drop occurs in the equipment group 2 of FIG. 2 in the entire system, and the voltage at the instantaneous voltage drop of the bus 2 in FIG. And The operating voltage of ΔUVR2 installed on the bus 2 in FIG. 4 is assumed to be 60 KV. In step S14, the voltage at the instantaneous voltage drop extracted in step S13 is compared with the operating voltage of ΔUVR,
If (the former <the latter), step S15 instantaneous voltage drop processing is performed, and if (the former ≧ the latter), it is not performed. Here, as for the bus 2 in FIG. 4, the former is 59 KV and the latter is 60 KV, so that the step S15 instantaneous voltage drop processing is executed. In step S15, an instantaneous voltage lowering process is performed.

[0018]

[Claim 1] and [Claim 2] of the present invention
According to the power system computer system according to the above, the following effects can be obtained. In the past, power system operators were conscious of the occurrence of ΔUVR erroneous changes, so it was necessary to determine whether or not ΔUVR erroneous occurrences were erroneous, and to perform post-processing after an instantaneous voltage drop caused by ＵＶUVR erroneous changes. Although it has been implemented, it is possible to save labor such as the first time a ΔUVR erroneous change is detected during or after the operation. Even if a ΔUVR erroneous change occurs, it is not recorded as a record, so that an accurate record of the instantaneous voltage drop can be recorded.

[Brief description of the drawings]

FIG. 1 is a functional block diagram illustrating a ΔUVR state change detection method of a power system computer system according to [Claim 1] of the present invention.

FIG. 2 is a power system diagram for explaining an embodiment according to [claim 1] of the present invention.

FIG. 3 is a flowchart illustrating a ΔUVR operation number determination process according to claim 1 of the present invention.

FIG. 4 is a power system diagram for explaining an embodiment according to [claim 2] of the present invention.

FIG. 5 is a functional block diagram illustrating a ΔUVR state change detection method of the power system computer system according to [claim 2] of the present invention.

FIG. 6 is a flowchart illustrating a bus voltage presence / absence determination process according to [claim 2] of the present invention.

[Explanation of symbols]

 Reference Signs List 1 power system 2 transmission circuit 3 power system information input device 4 power system computer 41 power system information input processing unit 42 ΔUVR operation number judgment processing unit 43 ΔUVR detection number setting data 44 power system definition data 45 bus line voltage presence / absence judgment processing 46 Voltage data 5 Operator console

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02J 13/00 H02H 7/22

Claims (2)

(57) [Claims] 1. A voltage drop caused by an actual fault in a power system based on a change in the state of an instantaneous voltage drop relay operated in response to an instantaneous voltage drop when an accident occurs in the power system.
In the power system computer system to determine whether or not
Power to capture instantaneous voltage drop relay information from power system
System information input means, and
Takes out information and judges the instantaneous voltage drop relay operation number
Power system information input processing means to be delivered and started to processing means
When the instantaneous voltage drop occurs, the voltage drop
To determine whether the accident was due to an actual accident
Stores the number of activated instantaneous voltage drop detection relays
The instantaneous voltage drop relay detection number setting data storage means
A power connection that defines the connection relationship of each equipment group in the power system
Power system definition data storage means;
Voltage drop relay information from the
-Set number information from the detected number setting data storage
The connection information from the power system definition data storage
And perform instantaneous voltage drop processing for each equipment group
A method for detecting an instantaneous voltage drop relay state change of a power system computer system, comprising: an instantaneous voltage drop relay operation number determination processing means . 2. Based on a change in the state of an instantaneous voltage drop relay operated in response to an instantaneous voltage drop when an accident occurs in the power system, the voltage drop is due to an actual accident in the power system.
In the power system computer system to determine whether or not
Instantaneous voltage drop relay information from the power system and bus voltage value
Means for inputting power system information,
Takes out information from force means and uses it for bus voltage
Power system information input processing means to be delivered to the disconnection processing means and activated
And a power system mother from the power system information input processing means.
Voltage data storage means for storing the line voltage value;
The data that defines the connection relationships for each equipment group
Means for storing power system definition data to be stored;
The instantaneous voltage drop relay information from the
Bus voltage information from data storage means and the power system definition
Extract the connection information from the data storage and
Bus voltage with instantaneous voltage drop processing for loop
An instantaneous voltage drop relay-like change detection method for a power system computer system, comprising a non-judgment processing means .