KR102531071B1 - Blocking misoperation prevention method and device using interlock - Google Patents

Abstract

A method for preventing erroneous operation of blocking using an interlock of the present invention is a method for preventing erroneous operation of blocking of a blocking means for a power facility having a target load, comprising the steps of monitoring the target load and writing a state; receiving an operation instruction for the blocking means from a manager; checking an interlock condition including a state description of the target load; and executing an instruction from the manager when the interlock condition is not met.

Description

Blocking misoperation prevention method and device using interlock {BLOCKING MISOPERATION PREVENTION METHOD AND DEVICE USING INTERLOCK}

The present invention relates to a method for preventing erroneous operation of a circuit breaker or switch in the power field using an interlock, and more particularly, to a method for preventing erroneous operation of a shutdown using an IED logic and/or a goose interlock.

Although substation facilities are becoming digitalized, power failures due to operator misoperation continue to occur in remote offices, such as dispatcher substations.

1A to 1C are conceptual diagrams showing cases of erroneous operation of circuit breakers in normal operating facilities.

1A is a case of opening a D/L breaker due to a worker's mistake, FIG. 1B is a case of opening an M.Tr breaker, and FIG. 1C is a case of opening a customer line breaker.

Currently, GIS circuit breakers, disconnectors, and ground switches are interlocked to prevent malfunctions due to misoperation, but there is no interlock means using automated devices for opening operation of circuit breakers in normal operating facilities.

Therefore, it is necessary to improve by applying automation means to prevent misoperation of the circuit breaker opening of normal operating facilities due to the misunderstanding of the dispatcher, but it is impractical to build separate additional equipment or monitoring system only for interlock due to high cost. .

Republic of Korea Patent Registration No. 10-1803880 : Automatic load switching switch

An object of the present invention is to provide a method for preventing erroneous operation of shutoff using an interlock capable of preventing erroneous operation of a shutoff means of a normal operating facility due to a worker's misunderstanding.

According to one aspect of the present invention, a method for preventing erroneous operation of blocking using an interlock is a method for preventing erroneous operation of blocking of a power facility having a target load, comprising the steps of monitoring the target load and writing a state; receiving an operation instruction for the blocking means from a manager; checking an interlock condition including a state description of the target load; and executing an instruction from the manager when the interlock condition is not met.

Here, in the step of describing the state, whether the load is loaded or not may be indicated on the load toggle bit, and in the case of a transformer, whether or not the loop state may be indicated on the loop toggle bit.

Here, the operation of the blocking unit may be an opening operation of a circuit breaker for a distribution line, a transformer, or a customer line.

Here, in the step of checking the interlock condition, in the case of a circuit breaker with load loading displayed, the interlock is reflected, but in the case of a transformer, if a loop state is displayed even when the load loading is displayed, the interlock may be released and an open operation may be allowed.

Here, after the step of executing the instruction from the manager according to the loop state, the step of notifying the loop state release to the transformer and other transformers that have been in the loop state may be further included.

Here, if the interlock condition is satisfied, the step of suspending the execution of the instruction from the manager; and notifying the manager of information on suspension of the instruction.

An apparatus for preventing erroneous operation of blocking using an interlock according to another aspect of the present invention is a device for preventing erroneous operation of blocking means for a power facility having a target load, comprising: a load monitoring unit for monitoring the target load; an interlock setting unit that pre-specifies various interlock conditions; an instruction accepting unit receiving an operation instruction for the blocking means from a manager; and an interlock performing unit that checks an interlock condition including a description of the state of the target load, and executes an instruction from the manager if the interlock condition is not met.

Here, the interlock performing unit may suspend execution of an instruction from the manager and notify the manager of information about the suspension of the instruction when the interlock condition is met.

Here, the operation of the blocking unit may be an opening operation of a circuit breaker for a distribution line, a transformer, or a customer line.

Here, the interlock setting unit may include a load toggle bit indicating whether a load is loaded and a loop toggle bit indicating whether a loop state is present in the case of a transformer.

Here, the interlock performer may reflect the interlock in the case of a circuit breaker in which load loading is displayed, but release the interlock and permit an opening operation in the case of a transformer if a loop state is displayed even in the case of a load loading display.

If the method and / or device for preventing erroneous operation of blocking using an interlock according to the spirit of the present invention having the above configuration is implemented, there is an advantage in preventing erroneous operation of the blocking means of normal operating equipment due to the worker's misunderstanding. .

A method and/or apparatus for preventing erroneous operation of a blocking device using an interlock according to the spirit of the present invention has an advantage of fundamentally preventing erroneous operation of workers at a dispatching branch office that constantly occurs.

A method and/or device for preventing erroneous operation of a shutoff using an interlock according to the spirit of the present invention has the advantage of low construction cost because it does not require circuit supplementation or addition of facilities at a substation site only by improving the IED logic and improving the Goose communication interlock. .

1A to 1C are conceptual diagrams showing cases of erroneous operation of circuit breakers in normal operating facilities.
2 is a flowchart illustrating an embodiment of a blocking erroneous manipulation prevention method using an interlock according to the spirit of the present invention.
3 is a block diagram illustrating an embodiment of an apparatus for preventing erroneous operation of blocking using an interlock according to the spirit of the present invention.
4A is a conceptual diagram illustrating a circuit breaker interlock structure according to the prior art.
4B is a conceptual diagram illustrating an improved circuit breaker interlock structure according to the spirit of the present invention.
5A is an IED-related logic diagram illustrating a case in which the spirit of the present invention is applied to a distribution line breaker.
5B is an IED-related logic diagram illustrating a case in which the concept of the present invention is applied to a circuit breaker of a transformer.
5C is an IED-related logic diagram illustrating a case in which the idea of the present invention is applied to a circuit breaker of a customer line.

In describing the present invention, terms such as first and second may be used to describe various components, but the components may not be limited by the terms. Terms are only for the purpose of distinguishing one element from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention.

When a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it may be understood that another component may exist in the middle. .

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions may include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms include or include are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features or numbers, It can be understood that the presence or addition of steps, operations, components, parts, or combinations thereof is not precluded.

In addition, shapes and sizes of elements in the drawings may be exaggerated for clearer description.

2 is a flowchart illustrating an embodiment of a blocking erroneous manipulation prevention method using an interlock according to the spirit of the present invention.

The illustrated method for preventing erroneous operation of blocking using the interlock is a method for preventing erroneous operation of blocking of a blocking means for a power facility having a target load, comprising the steps of monitoring the target load and writing a state (S120); Receiving an operation instruction for the blocking unit from a manager (S110); Checking interlock conditions including the state description of the target load (S140); and performing an instruction from the manager if the interlock condition is not met (S170).

In addition, if the result of performing the step S140 corresponds to the interlock condition (Y in S150), the step of suspending the execution of the instruction from the manager (S160); and notifying the manager of information about the suspension of the instruction (S180).

According to the method for preventing erroneous manipulation of blocking using the illustrated interlock, a circuit for preventing erroneous manipulation of blocking can be simply and economically implemented using a logic circuit and a toggle bit. In the step of describing the state (S120), whether or not the load is loaded may be indicated in the load toggle bit, and in the case of a transformer, whether or not the loop state may be indicated in the loop toggle bit.

In general, an operation of a cut-off means by a worker (manager) of a remote power supply branch office is often an open operation of a circuit breaker for a distribution line, a transformer, or a customer line.

Among the three fields described above, distribution lines and customer lines must be prohibited from opening when a load is loaded. Even if it is loaded, it is okay to open the circuit breaker in case of emergency.

In view of the above circumstances, in the step of checking the interlock condition, in the case of a circuit breaker with load loading displayed, the interlock is reflected, but in the case of a transformer, if the loop state is displayed even when the load loading is displayed, the interlock is released and an open operation is allowed can do. Additionally, in this case, the interlock is not performed and the operation according to the instruction is performed (S170), but after the step S170 is performed, the loop state is released for the other transformer that was in the loop state with the transformer (ie, the loop toggles as an interlock condition for the other transformer). bit) can be performed.

3 is a block diagram illustrating an embodiment of an apparatus for preventing erroneous operation of blocking using an interlock according to the spirit of the present invention.

The illustrated device for preventing erroneous operation of blocking using an interlock is a device for preventing erroneous operation of blocking of a blocking unit for a power facility having a target load, comprising: a load monitoring unit 120 that monitors the target load; an interlock setting unit 140 that pre-specifies various interlock conditions; an instruction accepting unit 170 receiving an operation instruction for the blocking means from a manager; and an interlock performing unit 160 that checks an interlock condition including the description of the state of the target load, and executes an instruction from the manager if the interlock condition is not met.

As described above, in most cases, the operation of the blocking means is an opening operation of a circuit breaker for a distribution line, a transformer, or a customer line. In particular, in order to apply an interlock to opening/closing of a circuit breaker of a transformer, the interlock setting unit 140 includes a load toggle bit 142 indicating whether a load is loaded or not and a loop toggle indicating whether a loop state is present in the case of a transformer. bit 144.

In this case, the interlock performing unit 160 may reflect the interlock in the case of a circuit breaker with load loading displayed, but release the interlock and permit an opening operation if a loop state is displayed even in the case of a transformer with load loading displayed.

The device for preventing erroneous operation of blocking using the illustrated interlock can be implemented with a SW/HW module provided in the IED, but it is advantageous to implement it in a circuit breaker control circuit in the form of a PCB added to the circuit breaker to reduce construction costs. do. For example, in this case, the load toggle bit 142 and the loop toggle bit 144 may be implemented as toggle bits capable of influencing a logic circuit generating a circuit breaker open signal, and the interlock setting unit 140 may toggle each of the toggle bits. You can have jumper switches to enable/disable the bits.

Depending on the implementation, the load monitoring unit 120 may be a circuit or receiving unit that receives an instruction to change the toggle bit of the logic circuit or a signal for direct change from the IED.

On the other hand, in the recently constructed 154kV substation, the IED and the upper system are connected with optical cables rather than control cables, and the circuit implementation of the IED installed in the GIS and protection switchboard is configured from electrical circuits to logic circuits, making it easy to modify. In particular, GIS As the interlock configuration between hard wires (control cables) has been changed to goose communication interlocks, interlock implementation has become easier. Accordingly, the blocking erroneous manipulation prevention device using the illustrated interlock may be implemented as a goose communication interlock module.

Circuit breakers installed in substations are installed in the field by reflecting opening and closing operations according to the current standard interlock conditions (mainly gas status check), but additional circuit supplementation or interlock implementation is required to prevent malfunction of circuit breakers in normal operation. Facility needs improvement. In the present invention, as a technical implementation of preventing erroneous operation of a circuit breaker during normal operation by utilizing the IED logic and Goose communication interlock function of a digital substation, an apparatus and method for preventing erroneous operation of the circuit breaker using the above-described interlock are proposed.

4A is a conceptual diagram illustrating a circuit breaker interlock structure according to the prior art.

4B is a conceptual diagram illustrating an improved circuit breaker interlock structure according to the spirit of the present invention.

Since the circuit breaker interlock of the related art shown in FIG. 4a considers only gas locking, there is a considerable possibility that the remote operator may erroneously operate the circuit breaker of the operation facility. On the other hand, the interlock structure according to the spirit of the present invention shown in FIG. 4B performs interlock in consideration of not only gas locking but also load loading and the state of the circuit breaker, thereby preventing erroneous operation of the circuit breaker of operating equipment due to a remote operator's mistake. can

That is, the improvement by the blocking erroneous operation prevention device/method using the interlock according to the spirit of the present invention can effectively prevent erroneous operation of the dispatcher's operation by utilizing the IED logic and the Goose communication interlock function.

5A is an IED-related logic diagram illustrating a case in which the spirit of the present invention is applied to a distribution line breaker.

IED logic improvement method according to the spirit of the present invention in distribution line breakers An interlock can be applied, and accordingly, when a load is loaded on the distribution line (D/L), the circuit breaker is interlocked in an unopenable state, thereby preventing power outages to the loaded load.

5B is an IED-related logic diagram illustrating a case in which the concept of the present invention is applied to a circuit breaker of a transformer.

IED logic and Goose communication improvement method according to the spirit of the present invention to the circuit breaker placed in the transformer Interlock can be applied, and accordingly, when the load supplied by the transformer is loaded, the transformer is interlocked so that the circuit breaker cannot be opened, but in the case of a multi-level, loop between other transformers and transformers, the interlock is partially released so that the circuit breaker can be opened. .

5C is an IED-related logic diagram illustrating a case in which the idea of the present invention is applied to a circuit breaker of a customer line.

An interlock can be applied to a customer line circuit breaker in an IED logic improvement method according to the spirit of the present invention, and accordingly, when a load is loaded on a customer line, the circuit breaker is interlocked in a non-openable state to prevent power failure for the loaded customer load. can

Those skilled in the art to which the present invention pertains should understand that the embodiments described above are illustrative in all respects and not limiting, since the present invention can be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. only do The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. .

120: load monitoring unit
140: interlock setting unit
142: load toggle bit
144: loop toggle bit
160: interlock performing unit
170: instruction reception department

Claims (11)

As a method for preventing erroneous manipulation of blocking means for a power facility having a target load,
monitoring the target load and writing a state;
receiving an operation instruction for the blocking means from a manager;
checking an interlock condition including a state description of the target load; and
If the interlock condition is not met, performing an instruction from the manager,
The operation of the blocking means is an opening operation of a circuit breaker for a distribution line, a transformer, or a customer line,
In the step of checking the interlock condition, in the case of a circuit breaker with load loading displayed, the interlock is reflected, but in the case of a transformer, if the loop state is displayed even when the load loading is displayed, the interlock is released and an open operation is allowed, depending on the loop state. After the step of performing the instruction from the manager, the step of notifying the loop state release to the other transformer to indicate the loop toggle bit as an interlock condition of the transformer and the other transformer that was in the loop state is utilized. How to avoid blocking erroneous operation.
According to claim 1,
In the step of describing the state,
Indicate whether the load is loaded in the load toggle bit,
In the case of a transformer, a method for preventing erroneous manipulation of the cut-off using an interlock that indicates whether the loop is in the loop state or not on the loop toggle bit.
delete delete delete According to claim 1,
suspending execution of instructions from the manager if the interlock condition is met; and
Notifying the manager of information about the suspension of the instruction
Blocking erroneous operation prevention method using an interlock further comprising a.
As a blocking erroneous operation prevention device of a blocking means for a power facility having a target load,
a load monitoring unit that monitors the target load;
an interlock setting unit that pre-specifies various interlock conditions;
an instruction accepting unit receiving an operation instruction for the blocking means from a manager; and
An interlock performing unit that checks an interlock condition including the description of the state of the target load, and executes an instruction from the manager if the interlock condition is not met
Including,
The operation of the blocking means is an opening operation of a circuit breaker for a distribution line, a transformer, or a customer line,
The interlock setting unit,
A load toggle bit indicating whether or not the load is loaded (another looped transformer notifies the release of the loop) and
In the case of a transformer, a loop toggle bit indicating whether or not the loop is in a loop state.
Including,
The interlock performing unit,
In the case of a circuit breaker with load loading, the interlock is reflected, but in the case of a transformer, if the loop status is displayed even if the load loading is displayed, the interlock is released and the opening operation is allowed.
According to claim 7,
The interlock performing unit,
If the interlock condition is met, the blocking erroneous operation prevention device using an interlock that suspends the execution of an instruction from the manager and notifies the manager of information about the suspension of the instruction.
delete delete delete

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