KR20170007564A - Reclosing test apparatus, reclosing test system and reclosing test method - Google Patents

Abstract

A reclosing verification apparatus according to an embodiment of the present invention includes: a contact control unit which switches off a contact state of a circuit breaker by receiving an open signal and switches on the contact state of the circuit breaker by receiving an injection signal after a line connected to the circuit breaker is reclosed; and a reclosing verification unit which verifies the reclosing of the line when the contact sate of the circuit breaker is off, thereby simplifying a reclosing verification operation.

Description

[0001] The present invention relates to a reclosing test apparatus, a reclosing test system, and a reclosing test method,

The present invention relates to a reclosing verification apparatus, a reclosing verification system, and a reclosing verification method.

The 345kV transmission line protection module can detect the failure of the protection zone and send an open signal to the breaker to shut down the fault current. In addition, the transmission line protection unit can perform a reclosing command function by providing a reclosing system for quickly recovering an instantaneous failure that occupies most of the line failures.

The reclosing command function can be performed through line protection relay correction. Here, the line protection relay correction is not common to all the lines, and may have different correction values depending on the system configuration and the armistice. Therefore, after the correction of the transmission line protection system reclosing system is completed, it is necessary to carry out a separate test to verify whether the correction is correct.

In the existing transmission line protection system, the reclosing system verification method has been used to confirm a series of operation items while issuing an opening and closing command to the actual site breaker. That is, there has been used a method of directly operating the circuit breaker while maintaining the connection related to the opening and closing of the breaking period with the protective switchgear.

According to this, it is necessary to arrange a person in the protective switchboard and the field to check the operation of each operation individually. That is, it is a method to operate the circuit breaker directly.

Recloser system verification has at least 80 confirmation tests per track, which can take as long as one day for the entire test. In addition, since the circuit breaker must be operated directly during the test, there are many variables such as maintenance of the circuit breaker and shortening the service life, and waiting time when the hydraulic pressure or air pressure decreases during the test.

That is, since the circuit breaker is repeatedly operated in order to verify the reclosing system instead of the circuit breaker self test, it is repeated unnecessary operation in view of the circuit breaker. Therefore, there is a need for a means for verifying reclosing without the operation of a field breaker for reclosing verification.

In order to solve the above-mentioned problems, an embodiment of the present invention provides a reclosing verification apparatus, a reclosing verification system, and a reclosing verification method.

In the reclosing verification apparatus according to an embodiment of the present invention, an open signal is applied to turn off the contact state of the breaker, and after the line connected to the breaker is closed again, a closing signal is applied to turn on the contact state of the breaker. ; And a reclosing verification unit for verifying the reclosing of the line when the contact state of the circuit breaker is off; . ≪ / RTI >

For example, the contact point control unit can control the contact state of the circuit breaker using a keep relay, and can control the contact states of the plurality of circuit breakers using a plurality of key relays. Here, the plurality of key relays may change the contact state of the plurality of breakers from the ON state to the OFF state at the same time, and change the contact state of the plurality of breakers sequentially from the OFF state to the ON state.

For example, the reclosing verification device may include: a counting unit counting the number of times that the plurality of key relays change the contact state of one of the plurality of breakers to an on state; A display unit for displaying a contact state of the breaker through illumination; A communication unit for receiving the open signal and the closing signal and transmitting the change information of the contact state of the breaker; And a power supply unit for receiving the open signal and activating the contact control unit by receiving a preset DC power.

A reclosing verification system according to an embodiment of the present invention includes: a plurality of circuit breakers connected to a line; A protective distribution unit for detecting an abnormal state of the line and sending an open signal to at least one of the plurality of circuit breakers, reclosing the line, and sending an input signal to at least one of the plurality of circuit breakers; And a reclosing verification module for controlling the contact state of at least one of the plurality of breakers based on the open signal and the closing signal and for verifying the reclosing of the at least one of the plurality of breakers when the contact state is off, ; . ≪ / RTI >

For example, the plurality of circuit breakers may be connected to the line by a 1.5CB (Circuit Breaker) method.

For example, the reclosing module controls a contact state of each of a plurality of breakers to which an open signal is transmitted by using a plurality of key relays, and the plurality of key relays include a plurality of The contact state of the breaker can be simultaneously changed from the on state to the off state and the contact state of the plurality of breakers to which the open signal is transmitted can be sequentially changed from the off state to the on state.

For example, the reclosing verification module counts the number of times that the plurality of key relays change the contact state of one of the plurality of breakers to which the open signal is transmitted from the off state to the on state, Closing verification system.

For example, when the reclosing module detects an abnormal state of the line at the protection power distribution unit, the contact control module may be activated by receiving a predetermined DC power.

In the reclosing verification method according to an embodiment of the present invention, when the line is in an abnormal state, an open signal is sent to a keep relay connected to the line to turn off the contact state of the key relay. Reclosing the line through correction of the line protection relay; Verifying the reclosing of the line; And transmitting an input signal to the key relay to turn on the contact state of the key relay. . ≪ / RTI >

For example, when the failure is detected in one phase in the line, the contact state of the key relay connected to the line is turned off, and when a failure is detected in the plurality of phases in the line , The contact state of the key relay connected to the line of all phases can be turned off.

For example, the reclosing method may further include outputting change information of the contact state of the key relay, and the step of outputting the change information may include changing the contact state of the key relay to an on state Can be counted and output.

According to the present invention, the recloser itself can be verified without any operation of the breaker, and the time can be reduced to 1/10 or less, which can shorten the interruption time.

1 is a block diagram illustrating a reclosing apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a reclosing apparatus of FIG. 1 in detail.
FIG. 3 is a diagram illustrating the contact control unit of FIG. 1 in detail.
4 is a diagram illustrating a reclosing verification system according to an embodiment of the present invention.
5 is a flowchart illustrating a reclosing verification method according to an embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order that those skilled in the art can easily carry out the present invention.

1 is a block diagram illustrating a reclosing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the reclosing apparatus 1 may include a contact control unit 10 and a reclosing unit 20.

The contact control unit 10 turns off the contact state of the breakers CB1 and CB2 by applying an open signal and applies a closing signal to the circuit breakers CB1 and CB2 after the line connected to the breakers CB1 and CB2 is closed again, It is possible to turn on the contact state of the switch. That is, during the operation of the line, the breakers CB1 and CB2 are opened or closed depending on the signal. However, during verification of the reclosing, the contact state may be turned on or off according to a signal instead of the open- have.

For example, the contact point control unit 10 may control the contact point state of the circuit breaker using a keep relay. Here, the key relay operates the contact when the electromotive electromagnet is excited by two electromagnets for operation and return, and the state means a relay which is maintained regardless of whether or not there is an operation exciter until the return electromagnet is excited. The final contact state can be maintained even if the corresponding signal is lost. Accordingly, the contact control unit 10 can cut off the connection of the line more quickly than the open-close of the circuit breakers CB1 and CB2.

For example, the contact point control unit 10 can control the contact state of each of the plurality of circuit breakers using a plurality of key relays. That is, the contact point control section 10 can control the contact states of the a-phase line b-phase line and the c-phase line, respectively, and can control the contact states of the first breaker CB1 and the second breaker CB2 Each contact state can be controlled.

Here, the plurality of key relays may change the contact state of the plurality of breakers from the ON state to the OFF state at the same time, and change the contact state of the plurality of breakers sequentially from the OFF state to the ON state. By simultaneously changing the contact states of the plurality of breakers, the control of the contact state can be simplified. By sequentially changing the contact states of the plurality of breakers, it is possible to stably control the plurality of circuit breakers having different correction values according to necessity, such as the system configuration and the interruption.

The reclosing verification unit 20 can verify the reclosing of the line when the contact state of the circuit breakers CB1 and CB2 is off. The reclosing of the line can be carried out by correcting the line protection relay. Here, the line protection relay correction is not common to all the lines, and may have different correction values depending on the system configuration and the armistice. Therefore, after the correction of the transmission line protection system reclosing system is completed, it is necessary to carry out a separate test to verify whether the correction is correct.

For example, the reclosing verification unit 20 can perform at least 80 verification tests per line in a state in which the protection of the protective switchboard and the connection of the specific conditions relating to the opening and closing of the blocking period are maintained.

When the contact point is controlled by the contact point control unit 10 compared to when the circuit breakers CB1 and CB2 are directly opened and closed, the time required for several confirmation tests can be reduced to 1/10 or less, Or the waiting time and the rest period according to the air pressure decrease can be shortened.

FIG. 2 is a diagram illustrating a reclosing apparatus of FIG. 1 in detail.

2, the reclosing apparatus 1 includes a counting unit 30, a display unit 40, a communication unit 50, and a power supply unit 50, as well as the contact control unit 10 and the reclosing unit 20, And may further include a supply unit 60.

The contact control unit 10 can receive eight open signals and two closing signals through the transmission line protection switchboard. For example, the contact point control unit 10 can receive an open signal through TRIP1 and TRIP2, and receive an input signal through CLOSE1 and CLOSE2.

The reclosing verification unit 20 can output a total of eight confirmation test signals through the respective circuit breakers CB1 and CB2.

The counting unit 30 can count the number of times the contact control unit 10 changes the contact state of one of the circuit breakers from the off state to the on state. For example, if a sequence is set for dozens of confirmation tests of the reclosing unit 20, a confirmation test can be identified by the counting operation of the counting unit 30. [ Thereby, the reclosing verification operation of the reclosing verification unit 20 can be stably controlled.

The display unit 40 can display the contact state of the breaker through illumination. For example, the display unit 40 may include a lamp that can be displayed for a total of six breakers.

For example, the lamp may be illuminated in red when the circuit breaker is closed and green when it is open. The colors displayed on the display unit 40 may be set in consideration of safety. That is, the display unit 40 displays in green the lines that are in a safe state to be verified by the reclosing unit verifying unit 20, and the lines that are in a dangerous state to be verified by the reclosing unit verifying unit 20 are red Can be displayed.

If an open signal is received for a circuit breaker on a, the corresponding lamp on a may change from red to green. If an input signal is input to the b phase breaker, the lamp may turn from green to red. On the other hand, the display unit 40 can display all red in the initial state.

The communication unit 50 receives the open signal and the closing signal, and can transmit the change information of the contact state of the breaker. For example, when the open signal or the closing signal is input, the communication unit 50 can transmit the on-off change of the contact point to the protection unit at the key relay contact point.

The confirmation test of the reclosing verification unit 20 from the protection unit can be controlled by the communication unit 50. [ For example, when the number of counts of the counting unit 30 is transmitted by the communication unit 50, the guard can confirm the type of the confirmation test to be performed and set the verification test conditions according to the progress confirmation test, Can be operated intensively.

When the open signal is received by the communication unit 50, the power supply unit 60 can receive the predetermined DC power and activate the contact point control unit 10. [ For example, the power supply unit 60 may receive a DC power of 125V through a power source.

The reclosing apparatus 1 may be in an inactive state or an off state at a normal time, and may be in an activated state or an on state in a reclosing test. Receiving the open signal by the communication unit 50 means that the reclosing test is started, so that the power supply unit 60 can use the open signal as the ignition signal. Thus, power consumption of the reclosing apparatus 1 can be reduced.

On the other hand, the recloser verification apparatus 1 may be an additional structure embedded in the protection switchboard, or may be made as a single unit. When the reclosing apparatus 1 is embedded in a protective switchboard, it is possible to configure the TRIP, CLOSE, and OUTPUT terminal blocks using the existing terminal block, and to arrange the lamp in a specific position. Accordingly, the reclosing test can be performed without carrying the reclosing apparatus 1.

Hereinafter, a reclosing verification system in which the reclosing verification apparatus 1 is built in a protection switchboard will be described with reference to FIG.

FIG. 3 is a diagram illustrating the contact control unit of FIG. 1 in detail.

Referring to FIG. 3, the contact control unit 10 may include key relays 11, 12, and 13 corresponding to respective phases.

For example, the key relays 11, 12 and 13 may include a reset sub-relay R for performing a reset (OFF) operation and a set sub-relay S for performing a set-on operation. Here, signals can be inputted individually for each phase through the reset sub-relay R, and a batch signal for three phases can be inputted through the set sub-relay S.

If an open signal is input through TRIP1 when the contact of a phase is on, the reset auxiliary relay (R) for phase a can be turned off by applying a voltage. Here, the reset auxiliary relay R with respect to the phase a can convey the change of the contact state through OUTPUT.

If a shutdown signal is input through CLOSE1, the set auxiliary relay S can be turned on by applying a voltage. Here, the two sub-auxiliary relays S can communicate that the contact state is changed through OUTPUT.

4 is a diagram illustrating a reclosing verification system according to an embodiment of the present invention.

Referring to FIG. 4, the reclosing verification system may include a plurality of circuit breakers CB1 and CB2, a protection power distribution unit 100, and a reclosing verification module 200. Referring to FIG.

The plurality of circuit breakers CB1 and CB2 may be connected to the line by a 1.5CB (Circuit Breaker) method. Generally, it is advantageous that the 345 kV transmission line is configured in the 1.5CB system in consideration of the system stability. Here, the 1.5CB scheme means a structure in which the first busbar and the second busbar are composed of three breakers or a structure in which transmission lines are connected through two breakers.

The number of confirmation tests for the reclosing verification when the plurality of circuit breakers CB1 and CB2 are connected to the line in the 1.5CB manner is the same as the number of verification tests when the plurality of circuit breakers CB1 and CB2 are connected to the line in a general manner May be greater than the number of verification tests for. Accordingly, when the plurality of circuit breakers CB1 and CB2 are connected to the line by the 1.5CB method, the reclosing verification system according to the embodiment of the present invention can further shorten the time required for the confirmation test, have.

The protective power distributing unit 100 detects an abnormal state of the line and sends an open signal to at least one of the plurality of circuit breakers CB1 and CB2 to reclose the line and at least one of the plurality of circuit breakers CB1 and CB2 The input signal can be transmitted to one. For example, the protective power distributing unit 100 may block a fault only for a fault and issue a reclosing command, block three phases for failures of two or more phases, and issue a reclosing command.

The reclosing verification module 200 controls the contact state of at least one of the plurality of circuit breakers CB1 and CB2 based on the open signal and the closing signal and notifies the contact state of at least one of the plurality of circuit breakers CB1 and CB2 When it is off, it can verify the reclosing of the line. For example, the reclosing verification module 200 may include the components included in the reclosing verification device 100 described above with reference to FIGS.

For example, the reclosing verification module 200 can control the contact states of the plurality of circuit breakers CB1 and CB2 to which an open signal is transmitted using a plurality of key relays. Here, the plurality of key relays change the contact state of the plurality of breakers CB1 and CB2 from which the open signal is sent from the ON state to the OFF state at the same time, and the contact states CB1 and CB2 ) Can be sequentially changed from the OFF state to the ON state.

For example, the reclosing verification module 200 counts the number of times the contact state of one of the plurality of circuit breakers CB1 and CB2, from which the plurality of key relays send open signals, is changed from the off state to the on state And can be sent to the protective distribution unit 100.

For example, when the abnormal state of the line is detected in the protection power distribution unit 100, the reclosing verification module 200 can be activated by receiving the predetermined DC power.

Hereinafter, an example of the operation process of the reclosing verification module 200 will be described.

First, a case where a single-phase failure is detected through the protective power distributing unit 100 will be described.

In the initial state, the A, B, and C phases of the CB1 and CB2 lamps are all red, and the OUTPUT CB1 and CB2 contacts are ON. INPUT TRIP1 When a signal is input to "a", the CB1 "A" lamp changes from red to green, and the OUTPUT CB1 "a" contact changes from the ON state to the OFF state. When the CLOSE1 signal is input, the CB1 "A" lamp changes from green to red, and the CB1 "a" contact can change from OFF to ON. At this point, the counter goes up by one. This operation can be performed simultaneously. Also, when a signal is input to INPUT TRIP2 "a", the CB2 "A" lamp changes from red to green, and the OUTPUT CB2 "a" contact can change from the ON state to the OFF state. When the CLOSE2 signal is received, the CB2 "A" lamp changes from green to red, and the CB2 "a" contact can change from OFF to ON. At this point, the counter goes up by one. This operation can be performed simultaneously. In general, the TRIP1 and TRIP2 signals come in at the same time, and the CLOSE1 and CLOSE2 signals can come in with a time difference depending on the correction. Therefore, OUTPUT also generates an output signal with a time difference.

Second, a case where a three-phase failure is detected through the protective power distributing unit 100 will be described.

In the initial state, CB1 and CB2 lamps are all red, and OUTPUT CB1 and CB2 contacts are ON. When a signal is input to TRIP1 "a, b, c" at INPUT, CB1 "A, B, C" lamp changes from red to green and OUTPUT CB1 "a, b, c" . When the CLOSE1 signal is received, the CB1 "A, B, C" lamp changes from green to red, and CB1 "a, b, c" contacts can change from OFF to ON. At this point, each counter is incremented by one. This operation can be performed simultaneously. Also, when a signal is input to TRIP2 "a, b, c" simultaneously from INPUT, CB2 "A, B, C" lamp changes from red to green and OUTPUT CB2 "a, b, c" . When the CLOSE2 signal is input, the CB2 "A, B, C" lamp changes from green to red, and CB2 "a, b, c" contacts can change from OFF to ON. At this point, the counter goes up by one. This operation can be performed simultaneously. In general, the TRIP1 and TRIP2 signals come in at the same time, and the CLOSE1 and CLOSE2 signals can come in with a time difference depending on the correction. Therefore, the OUTPUT signal may also have an output signal with a time difference.

Hereinafter, a reclosing verification method according to an embodiment of the present invention will be described. The reclosing verification method can be performed in the reclosing verification device 100 and / or the reclosing verification system described above with reference to Figs. 1 to 4, so that the same or equivalent contents as the above description are redundant .

5 is a flowchart illustrating a reclosing verification method according to an embodiment of the present invention.

5, when the line is in an abnormal state, the reclosing method sends an open signal to a keep relay connected to the line (S10) to turn off the contact state of the key relay (S20) step; Closing the line through the correction of the line protection relay (S30) and verifying the reclosing (S40); Sending an input signal to the key relay (S50) and turning on the contact state of the key relay (S60); And outputting change information of the contact state of the key relay (S70); . ≪ / RTI >

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Anyone can make various variations.

1: reclosing verification device 10: contact control part
20: reclosing verification unit 30: counting unit
40: display unit 50: communication unit
60: Power supply unit 100: Protection distribution unit
200: Recloser verification module CB: Circuit breaker

Claims (15)

A contact control unit for turning off the contact state of the breaker by applying an open signal and turning on the contact state of the breaker by applying a closing signal after the line connected to the breaker is closed again; And
A re-closure verification unit for verifying the reclosing of the line when the contact state of the circuit breaker is off; Wherein the recloser verification device comprises:
The method according to claim 1,
Wherein the contact point control unit controls the contact point state of the circuit breaker using a keep relay.
3. The method of claim 2,
The contact control unit controls the contact state of each of the plurality of circuit breakers using a plurality of key relays,
Wherein the plurality of key relays change the contact state of the plurality of breakers simultaneously from the on state to the off state and sequentially change the contact state of the plurality of breakers from the off state to the on state.
The method of claim 3,
Further comprising a counting unit for counting the number of times the plurality of key relays change the contact state of one of the plurality of breakers to an on state.
The method according to claim 1,
And a display unit for displaying the contact state of the breaker through illumination.
The method according to claim 1,
Further comprising a communication unit that receives the open signal and the closing signal and transmits change information of the contact state of the breaker.
The method according to claim 6,
And a power supply unit for receiving the open signal and activating the contact control unit by receiving a preset DC power.
A plurality of circuit breakers connected to the line;
A protective distribution unit for detecting an abnormal state of the line and sending an open signal to at least one of the plurality of circuit breakers, reclosing the line, and sending an input signal to at least one of the plurality of circuit breakers; And
A reclosing verification module for controlling at least one contact state of the plurality of circuit breakers based on the open signal and the closing signal and verifying reclosing of the at least one circuit breaker when the contact state of at least one of the plurality of circuit breakers is off; And a re-closure verification system.
9. The method of claim 8,
Wherein the plurality of circuit breakers are connected to the line by a circuit breaker (1.5CB) method.
9. The method of claim 8,
The reclosing verification module controls a contact state of each of a plurality of breakers to which an open signal is transmitted by using a plurality of key relays,
The plurality of key relays change the contact state of the plurality of breakers to which the open signal is sent from the ON state to the OFF state at the same time and sequentially change the contact state of the plurality of breakers to which the open signal is sent from the OFF state to the ON state Recloser verification system.
11. The method of claim 10,
Wherein the reclosing verification module counts the number of times the contact state of one of the plurality of breakers to which the plurality of the key relays is transmitted from the off state to the on state is counted and sends the count to the protection distribution unit.
9. The method of claim 8,
And the reclosing verification module is activated by being supplied with a predetermined DC power when the abnormal state of the line is detected in the protection power distribution portion.
Transmitting an open signal to a keep relay connected to the line to turn off the contact state of the key relay when the line is in an abnormal state;
Reclosing the line through correction of the line protection relay;
Verifying the reclosing of the line; And
Turning on a contact state of the key relay by sending a closing signal to the key relay; The method comprising the steps of:
14. The method of claim 13,
When a failure is detected in one phase of the line, the contact state of the key relay connected to the line of the phase is turned off,
And turning off the contact state of the key relay connected to the lines of all phases when a failure is detected in the plurality of phases in the line.
14. The method of claim 13,
Further comprising outputting change information of the contact state of the key relay,
Wherein the outputting of the change information comprises counting and outputting the number of times the contact state of the key relay is changed from the off state to the on state.

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