KR101771809B1 - Distance relay using partial trip blocking and method for operating thereof - Google Patents

Distance relay using partial trip blocking and method for operating thereof Download PDF

Info

Publication number
KR101771809B1
KR101771809B1 KR1020150144210A KR20150144210A KR101771809B1 KR 101771809 B1 KR101771809 B1 KR 101771809B1 KR 1020150144210 A KR1020150144210 A KR 1020150144210A KR 20150144210 A KR20150144210 A KR 20150144210A KR 101771809 B1 KR101771809 B1 KR 101771809B1
Authority
KR
South Korea
Prior art keywords
distance relay
protection
zone
transmission line
current
Prior art date
Application number
KR1020150144210A
Other languages
Korean (ko)
Other versions
KR20170044465A (en
Inventor
임성훈
김진석
김재철
노신의
Original Assignee
숭실대학교산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 숭실대학교산학협력단 filed Critical 숭실대학교산학협력단
Priority to KR1020150144210A priority Critical patent/KR101771809B1/en
Publication of KR20170044465A publication Critical patent/KR20170044465A/en
Application granted granted Critical
Publication of KR101771809B1 publication Critical patent/KR101771809B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08—Measuring resistance by measuring both voltage and current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements

Abstract

A distance relay using a partial trip inhibitor and an operation method thereof are disclosed. The distance relay includes a communication unit that communicates with other distance relays, a measurement unit that measures voltage and current of the transmission line, an impedance calculation unit that calculates an impedance value of the transmission line using the measured voltage value and current value of the transmission line, And a signal generator for generating a trip signal and transmitting the trip signal to the breaker when the fault current is sensed by using the calculated impedance value of the transmission line, In accordance with the protection area of the distance relay in which the impedance value of the relay relay is inputted.

Description

[0001] The present invention relates to a distance relay using partial trip prevention and a method of operating the same,

The present invention relates to a power transmission system, and more particularly, to a distance relay in a power transmission system to which a current limiter is applied and a method of operation thereof.

Application of the superconducting current limiter has been proposed and proposed as a method to stabilize and protect the power system as the short circuit current increased due to the extension of the electric power facility exceeds the breaking capacity of the existing protection device. However, the application of the superconducting current limiter to the fault current affects the impedance of the power system in a situation where the distance relay is applied to the protection system from the power system, so it is necessary to examine the malfunction and the negative operation of the distance relay.

Meanwhile, as a method to compensate for the malfunction and the negative action of the distance relay due to the impedance change caused by the operation of the superconducting current limiter, the operation of the distance relay is improved by introducing the trip prevention method. However, when the trip relay system is applied to the power relay system, the relay relay operates in the same manner as the main relay relay system, which causes a problem that the protection coordination can not be achieved.

Therefore, a method of operation of a distance relay capable of protection, which is the original role of the distance relay, is needed.

The present invention proposes a distance relay and a method of operating the same in which a trip prevention method is partially applied in order to enable post-protection of a power system in a power transmission system to which a current limiter is applied.

According to an aspect of the present invention, a distance relay in a power transmission system to which a current limiter is applied is disclosed.

A distance relay according to an embodiment of the present invention includes a communication unit that communicates with another distance relay, a measurement unit that measures a voltage and a current of the transmission line, a measurement unit that measures the impedance of the transmission line And a signal generator for generating a trip signal and transmitting the fault signal to the circuit breaker when the fault current is sensed by using an impedance value of the calculated transmission line, Wherein the signal generator operates in a partial trip prevention mode using the communication unit according to the protection area of the distance relay in which the impedance value of the calculated transmission line is inputted.

Wherein the signal generator operates in a trip-blocking manner using the communication unit when the protection area in which the impedance value is set is the first protection zone (Zone 1), and the protection zone in which the impedance value is included is in the second protection zone ) Or the third protection zone (Zone 3), it does not operate in the trip prevention mode and operates according to the operation time corresponding to the second protection zone or the third protection zone.

When the fault generator generates a fault current, the signal generator transmits a cutoff command signal to the other distance relay through the communication unit or receives the cutoff command signal from the other distance relay, And performs a blocking operation.

When the distance relay is located in a section adjacent to the fault zone and the distance relay located in the fault zone is not operated, the distance relay operates according to the operation time corresponding to the second protection zone or the third protection zone, do.

The protection area is an area of the impedance value at which the distance relay operates, and the operation time and the size of the protection area are set in the order of the first protection area, the second protection area, and the third protection area.

According to another aspect of the present invention, a method of operating a distance relay in a power transmission system employing a current limiter is disclosed.

A method of operating a distance relay according to an embodiment of the present invention includes measuring a voltage and a current of a transmission line and calculating an impedance value of the transmission line using the measured voltage and current values of the transmission line Determining whether a fault current is generated by using the calculated impedance value of the transmission line; confirming a protection area of the distance relay in which an impedance value of the calculated transmission line enters when the fault current occurs; And a step of operating in a partial trip prevention mode according to the protection area in which the impedance value is included.

Wherein the step of operating in the partial trip prevention mode includes the steps of operating in a trip blocking mode using the communication unit when the protection area in which the impedance value is included is the first protection zone (Zone 1) When the zone is the second protection zone (Zone 2) or the third protection zone (Zone 3), the operation does not operate in the trip protection mode, but operates according to the operation time corresponding to the second protection zone or the third protection zone .

The step of operating in the trip prevention mode may include transmitting a cutoff command signal to another distance relay when a fault current occurs or performing a cutoff operation of the fault current when receiving the cutoff command signal from the other distance relay.

The distance relay according to the embodiment of the present invention can be partially coordinated with the trip prevention method in a power transmission system to which a current limiter is applied, thereby improving operation and enabling post-protection of the power system so that protection cooperation can be achieved.

1 and 2 schematically illustrate a configuration of a power transmission system according to an embodiment of the present invention.
3 is a diagram illustrating a protection area of a distance relay.
4 is a view illustrating an operation time according to a protection area of a distance relay.
5 is a circuit diagram of a power transmission system model according to an embodiment of the present invention.
6 is a graph showing the impedance trajectory in the power transmission system model of FIG. 5;
FIG. 7 is a graph showing a failure current of each of the distance relays in the power transmission system model of FIG. 5; FIG.
FIG. 8 is a graph showing a failure current for each of the distance relays when the trip prevention system is applied in the power transmission system model of FIG. 5;
9 is a circuit diagram of a power transmission system model to which a partial trip prevention system according to an embodiment of the present invention is applied.
10 is a graph showing an impedance trajectory in the power transmission system model of Fig.
Fig. 11 is a graph showing the fault currents according to distance relays in the power transmission system model of Fig. 9; Fig.
12 is a flowchart illustrating a method of operating a distance relay according to an embodiment of the present invention.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In this specification, the terms "comprising ", or" comprising "and the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a view illustrating a protection area of a distance relay, FIG. 4 is a view illustrating an example of a structure of a power relay system according to a protection area of a distance relay, FIG. 5 is a diagram illustrating a circuit diagram of a power transmission system model according to an embodiment of the present invention. FIG. 6 is a graph showing an impedance trajectory in the power transmission system model of FIG. 5, and FIG. FIG. 8 is a graph showing a failure current of each of the distance relays when the trip prevention system is applied in the power transmission system model of FIG. 5, and FIG. 9 is a circuit diagram of a power transmission system model to which a partial trip prevention system according to an embodiment of the present invention is applied, Is a graph showing the impedance locus in the Dell, Figure 11 is a graph showing the fault current by the distance relay in a power transmission system model of FIG. Hereinafter, a power transmission system according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2, with reference to FIGS. 3 to 11. FIG.

Referring to FIGS. 1 and 2, a power transmission system according to an embodiment of the present invention includes a distance relay 100, a current limiter 10, and a circuit breaker 20. The distance relay 100 includes a measuring unit 110, an impedance calculating unit 120, a signal generating unit 130, and a communication unit 140.

The current limiter 10 functions to limit a fault current generated in the transmission line.

For example, the current limiter 10 may be a superconducting fault current limiter (SFCL). The superconducting current limiter normally has zero resistance and does not cause a loss of the power system. When a fault current occurs, the fault current is limited by a quench phenomenon with a resistance out of the superconducting state.

The superconducting current limiter has a resistive superconducting current limiter and a triggered superconducting current limiter. Because resistive superconducting current limiters are responsible for both fault current sensing and fault current limiting, the superconducting device is very burdened by fault currents in power transmission systems. In order to solve the problem of such a resistance type superconducting current limiter, a trigger type superconducting current limiter is configured in parallel with a current limiting device in a superconducting device and a switch device. That is, the superconducting element plays the role of detecting the fault current, and after the operation of the switch, the power limiting element plays a role of limiting the fault current. Thus, a triggered superconducting current limiter can overcome the problem of breakdown of a superconducting element due to a high fault current in a power transmission system.

The distance relay 100 determines the fault using the impedance value calculated from the relay installation point in the transmission line and blocks the fault current using the circuit breaker 20. [

For example, the distance relay 100 may be an mho-type distance relay, and the mho-type relay operates when the reciprocal number of the impedance (OHM), that is, the admittance unit (MHO) The current can be cut off.

For example, FIG. 3 shows the protection area of the distance relay 100 by R (Resistance) -X (Reactance) coordinates. Referring to FIG. 3, when a ground fault occurs in the power system, 75% of the first protection zone (Zone 1), 150% of the protection zone transmission line, the second protection zone (Zone 2) The zone (Zone 3) can be set up to 225% of the guard interval transmission line. Then, as shown in Fig. 4, the operation time for each protection area can be set. That is, the operation time of each protection zone can be set in the order of the first protection zone (Zone 1), the second protection zone (Zone 2), and then the third protection zone (Zone 3) . In the event of a short circuit fault in the power system, the protection area for the operation of the distance relay shall be in accordance with the installation regulations.

Hereinafter, an operation method of the distance relay 100 will be described with reference to FIGS. 5 to 8. FIG.

5, a power transmission system model according to an embodiment of the present invention is configured such that a current flows from left to right as shown in FIG. 5, and a superconducting current limiter (SFCL 13 , SFCL 23 ) It is assumed that each bus line is installed at the line withdrawal point, and that each distance relay is installed in one direction in the transmission line. When the fault occurrence position is within the first line protection interval l 1 , the internal fault F in and the fault occurrence position is within the second line protection interval l 2 on the basis of the distance relay provided on the bus 1 , It is assumed that it is an external fault (F out ).

5, when an internal fault F in occurs near the bus 3 and the superconducting current limiter operates, the circuit breaker CB 31 indicated by pink closest to the internal fault is connected to the corresponding distance relay DR 31 The circuit breaker CB 13 indicated by red is operated by the corresponding distance relay DR 13 and then the circuit breaker CB 23 indicated by the light blue is operated by the corresponding distance relay DR 23 , at which time the circuit breaker CB 32 , shown in dark blue, is not operated since the fault current flows in the reverse direction.

6, the impedance Z 31 (indicated by pink) of the distance relay DR 31 located in the internal fault section enters the first protection zone (Zone 1), and the internal fault section distance impedance of the relay (DR 13) located on the Z 13 (shown in red) is put in a second protection zone (zone 2) by operation of the superconducting current limiter, and the impedance of the distance relay (DR 23) located outside the zone Z 23 (indicated by light blue) enters the third protection zone (Zone 3). The impedance Z 32 (indicated by dark blue) of the distance relay DR 32 located in the outer section does not enter the protection area.

7, it can be seen that i 13 flowing in the internal fault section is shut off within about 20 Hz, and i 31 flowing in the internal fault section is blocked within about 5 Hz. 6, the impedance Z 13 of the distance relay DR 13 located in the internal fault zone enters the second protection zone Zone 2, and the distance relay DR the impedance Z 31 of 31), means for entering a first protection zone (zone 1). And i 32 flowing in the outer section seems to be blocked after about 5 Hz due to the fault current flowing in the reverse direction. This is because the fault current flowing in the distance relay DR 32 in the external section flows in the reverse direction and the distance relay DR 32 does not operate. However, the distance relay DR 31 located in the internal fault section first blocks the fault current within about 5 Hz , It appears that the fault current is blocked. Similarly, i 23 flowing through the outer region is, As described the impedance locus 6, the distance relay (DR 23), one must operate at the third protection zone (Zone 3), in the distance to the internal fault section Relay (DR 31 ) First intercepts the fault current within about 5 Hz, so that the fault current appears to be interrupted.

5 to 7, a description has been given of a method of operating the distance relay 100 in a case where the trip prevention mode is not applied in the power transmission system model of FIG. Hereinafter, an operation method of the distance relay 100 will be described in the case where the trip prevention method is applied in the power transmission system model of FIG.

In the case where the trip protection mode is applied to the power transmission system, the distance relay 100 performs a fault current shutoff operation for transmitting a trip signal to the breaker 20 when a fault current occurs, 100 and transmits a cutoff command signal to the other distance relays 100. [ Then, the other relay 100 performs tripping prevention by performing a tripping operation of the fault current according to the reception of the shutoff command signal. That is, when the trip relay 100 operates in a trip-blocking mode, when a fault current is sensed by using the impedance value of the transmission line, the distance relay 100 disconnects the fault current generating the trip signal according to the operation time of the protection region corresponding to the impedance value The shutdown operation of the fault current can be performed according to the shutoff command signal received from the other relay 100 regardless of the determined operation time of the protection area.

For example, if the fault current of each of the distance relays in the case of applying the trip protection method of FIG. 8 is examined, i 31 and i 13 flowing in the internal fault section and i 23 and i 32 flowing in the external section are both blocked within about 5 Hz Can be confirmed. This is because the distance relay DR 31 closest to the internal fault period first interrupts the fault current within about 5 Hz and at the same time sends a shutdown command signal to the other distance relays DR 13 , DR 23 , DR 32 , (DR 13 , DR 23 , DR 32 ) operate to interrupt the fault current. Of course, as described in the case where the trip prevention method is not used, the distance relay DR 31 located in the internal fault section first interrupts the fault current so that the fault current flowing in the distance relays DR 32 and DR 23 located in the external section Lt; / RTI > may appear to be blocked.

Referring again to FIG. 1, the configuration of a distance relay 100 according to an embodiment of the present invention will be described.

The measuring unit 110 measures the voltage and current of the power transmission line and the current limiter 10. [ For example, the measuring unit 110 may include a power transformer (PT) and a current transformer (CT). The current limiter 10 measures the current of the transmission line using the CT installed on the transmission line, The voltage of the current limiter 10 can be measured using the PT connected to the current limiter 10.

The impedance calculating unit 120 calculates the impedance values of the transmission line and the current limiter 10 using the voltage value and the current value of the transmission line and the current limiter 10 measured by the measuring unit 110. [

For example, the impedance calculating unit 120 may calculate the impedance of the transmission line and the impedance value of the current limiter 10 using the following equation from the measured voltage value and current value of the transmission line.

[Equation 1]

Figure 112015099850887-pat00001

Here, Z DR denotes an impedance calculated by the distance relay (DR) 100, v denotes a voltage, i denotes a current, R denotes a resistance component, and X denotes a reactance component.

The signal generator 130 determines whether a fault current is generated by using the calculated impedance value of the transmission line. If a fault current is detected, the signal generator 130 transmits a trip signal to the circuit breaker 20 in order to cut off the fault current . At this time, the signal generating unit 130 may determine the operation time using the calculated impedance value of the transmission line, and may generate the trip signal according to the determined operation time and transmit the trip signal to the circuit breaker 20. For example, when the calculated impedance value of the transmission line decreases and enters the protection area (the first protection area to the third protection area), the signal generator 130 determines that a failure has occurred, and the impedance of the transmission line A trip signal can be generated according to the operation time corresponding to the protection area in which the value is stored and transmitted to the circuit breaker 20.

In particular, when a fault current is sensed, the signal generator 130 according to an embodiment of the present invention operates in a partial trip prevention mode according to a protection area in which the calculated impedance value is included. That is, the signal generator 130 according to the embodiment of the present invention operates in a trip-blocking manner using a communication unit 140, which will be described later, only when the protection area in which the calculated impedance value is included is the first protection area, In the case where the protection area in which the impedance value to be inputted is the second protection area or the third protection area operates according to the operation time corresponding to the second protection area or the third protection area instead of the trip protection mode.

Hereinafter, an operation method of the distance relay 100 in the power transmission system to which the partial trip prevention system according to the embodiment of the present invention is applied will be described with reference to FIGS. 9 to 11.

9, in the power transmission system model shown in FIG. 9, when a distance relay (DR 23 , DR 32 ) located in an external fault section in a state where an external fault (F out ) occurs, And the positional distance relays DR 13 and DR 31 operate.

When this situation occurs in the power transmission system with trip protection system, the distance relays (DR 23 , DR 32 ) located in the external fault section are not operated and the distance relays (DR 13 , DR 31 ) Since the cutoff command signal is not transmitted, the distance relays DR 13 and DR 31 located in the internal section are also not operated and the shutdown operation of the fault current is not performed. That is, even if the fault current is not blocked due to the non-operation of the distance relay in the fault occurrence period, the distance relay of the neighboring section in the fault occurrence section should block the fault current, It may not be done when the method is applied.

However, if the partial trip prevention method according to the embodiment of the present invention is applied to the power transmission system model shown in FIG.

Referring to FIG. 9, the distance relays DR 23 and DR 32 located in the external fault zone are not operated, but the distance relay DR 13 located in the internal region has the impedance value of the second protection region or the third The fault current can be cut off by operating according to the operation time corresponding to the second protection area or the third protection area instead of the trip protection mode. At this time, the distance relay DR 31 located in the inner section does not operate because the fault current flows in the reverse direction.

10, the impedance Z 13 of the distance relay DR 13 located in the inner section enters the boundary region between the second protection area and the third protection area, and the impedance Z 13 of the distance relay The impedance Z 31 of the relay DR 31 does not enter the protection area.

11, it can be seen that i 13 and i 31 flowing in the inner section are blocked within about 20 Hz. This means that the impedance Z 13 of the distance relay DR 13 located in the inner region enters the second protection region as shown in FIG. 10, and the impedance Z 13 of the distance relay DR 31 , The distance relay DR 31 does not operate, but the distance relay DR 31 located in the inner section blocks the fault current within about 20 Hz, so that the fault current appears to be blocked.

The communication unit 140 performs communication with the other distance relays 100. For example, the communication unit 140 may transmit a blocking command signal transmitted from the signal generating unit 130 to another distance relay 100.

The circuit breaker 20 operates according to the trip signal of the signal generating unit 130, thereby shutting off the power transmission line.

12 is a flowchart illustrating an operation method of a distance relay according to an embodiment of the present invention.

In step S1210, the distance relay 100 calculates the impedance value of the transmission line.

In step S1220, the distance relay 100 determines whether a fault current is generated by using the calculated impedance value of the transmission line.

In step S1230, the distance relay 100 determines the operation time using the calculated impedance value of the transmission line.

In step S1240, the distance relay 100 determines whether the determined operation time is the operation time corresponding to the first protection area.

In step S1250, the distance relay 100 operates in a trip prevention mode when the determined operation time is the operation time corresponding to the first protection area.

In step S1260, the distance relay 100 operates according to the determined operation time when the determined operation time is not the operation time corresponding to the first protection area.

On the other hand, the components of the above-described embodiment can be easily grasped from a process viewpoint. That is, each component can be identified as a respective process. Further, the process of the above-described embodiment can be easily grasped from the viewpoint of the components of the apparatus.

In addition, the above-described technical features may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. Should be regarded as belonging to the following claims.

10: Current limiter
20: Breaker
100: Distance relay
110:
120: Impedance calculation unit
130: Signal generator
140:

Claims (8)

In a distance relay in a power transmission system with a current limiter applied,
A communication unit for communicating with other distance relays;
A measuring unit for measuring a voltage and a current of the transmission line;
An impedance calculating unit for calculating an impedance value of the transmission line using the measured voltage value and current value of the transmission line; And
And a signal generator for generating a trip signal and transmitting the trip signal to the breaker when the fault current is sensed,
Wherein the signal generator is operated in a partial trip prevention mode using the communication unit according to the protection area of the distance relay in which the impedance value of the calculated transmission line is inputted, 1), when the protection zone in which the impedance value is included is the second protection zone (Zone 2) or the third protection zone (Zone 3), the trip protection method is operated using the communication unit, And operates in accordance with an operation time corresponding to the second protection area or the third protection area.
delete The method according to claim 1,
When the fault generator generates a fault current, the signal generator transmits a cutoff command signal to the other distance relay through the communication unit or receives the cutoff command signal from the other distance relay, To perform a blocking operation.
The method according to claim 1,
When the distance relay is located in a section adjacent to the fault zone and the distance relay located in the fault zone is not operated, the distance relay operates according to the operation time corresponding to the second protection zone or the third protection zone, The distance relay comprising:
The method according to claim 1,
Wherein the protection area is an area of the impedance value at which the distance relay operates and the operation time and the size of the protection area are set in the order of the first protection area, the second protection area, and the third protection area. Distance relay.
A method of operating a distance relay in a power transmission system with a current limiter applied,
Measuring the voltage and current of the power transmission line and calculating an impedance value of the power transmission line using the measured voltage and current values of the power transmission line;
Determining whether a fault current is generated using the calculated impedance value of the transmission line;
Confirming a protection area of the distance relay in which the impedance value of the calculated transmission line is included when the fault current occurs; And
And operating in a partial trip prevention mode according to a protection area in which the impedance value is included,
Wherein the step of operating in the partial trip-
Operating in a trip prevention mode using a communication unit that communicates with another distance relay when the protection area in which the impedance value is included is the first protection zone (Zone 1); And
The first protection zone does not operate in the trip protection mode and the second protection zone corresponds to the third protection zone if the protection zone in which the impedance value is included is the second protection zone Zone 2 or the third protection zone Zone 3 And operating in accordance with an operation time of the distance relay.
delete The method according to claim 6,
The step of operating in the trip-
Wherein when a fault current is generated, a shutoff command signal is transmitted to another distance relay, or when the shutoff command signal is received from the other distance relay, the shutoff operation of the fault current is performed.


KR1020150144210A 2015-10-15 2015-10-15 Distance relay using partial trip blocking and method for operating thereof KR101771809B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150144210A KR101771809B1 (en) 2015-10-15 2015-10-15 Distance relay using partial trip blocking and method for operating thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150144210A KR101771809B1 (en) 2015-10-15 2015-10-15 Distance relay using partial trip blocking and method for operating thereof

Publications (2)

Publication Number Publication Date
KR20170044465A KR20170044465A (en) 2017-04-25
KR101771809B1 true KR101771809B1 (en) 2017-08-28

Family

ID=58703615

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150144210A KR101771809B1 (en) 2015-10-15 2015-10-15 Distance relay using partial trip blocking and method for operating thereof

Country Status (1)

Country Link
KR (1) KR101771809B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7085910B2 (en) * 2018-06-14 2022-06-17 三菱電機株式会社 Protection relay device and failure detection device

Also Published As

Publication number Publication date
KR20170044465A (en) 2017-04-25

Similar Documents

Publication Publication Date Title
CN104779594B (en) Small current neutral grounding power system phase fault and single-phase grounding comprehensive protecting method
EP3266086B1 (en) Method for protection in a mixed power transmission line
US20140192458A1 (en) Power distribution systems and methods of operating a power distribution system including arc flash detection
US9837812B2 (en) Power distribution systems and methods of operating power distribution systems with partial differential protection
CN106374445B (en) The small current grounding fault processing method of line selection apparatus and protection reclosing cooperation
WO2014005635A1 (en) A power bay protection device and a method for protecting power bays
KR101316544B1 (en) Method for judging electric power system failure
EP2497175B1 (en) Method of monitoring the grading margin between time-current characteristics of intelligent electronic devices
KR101771809B1 (en) Distance relay using partial trip blocking and method for operating thereof
CN106602527B (en) Line selection apparatus and the small current grounding fault processing method for protecting anti-jump cooperation
KR101618627B1 (en) Method for cooperating operation of distance relay in power system, recording medium and system for performing the method
KR101673819B1 (en) Distance relay with correction function and method for operating thereof
JP2016220265A (en) Power distribution board
JP2011078303A (en) Distance relay apparatus, distance relay processing system, distance relay processing method
JP2017192179A (en) DC protection relay system
CN205595755U (en) High -voltage circuit relaying protection system
KR101503314B1 (en) Protective relay
CN106684840B (en) Method is exported when direct current protecting is unavailable in a kind of direct current polar control system
JP2007221930A (en) Protection relay having directionality and protective relay system having directionality
KR100985919B1 (en) Method for operating relays in a protective control system based on communication
CN117439023A (en) Underground cable fault protection method based on coordination of current relay and time sequence
Moustafa et al. Cascading failure prevention in electrical power protection system of nuclear power plant using IEC61850
Marroquin Evaluating the Hazards of Low-Voltage Arcs
KR102270713B1 (en) Protective relay for applying FACTS to real power system and method for protecting real power system thereof
KR200347633Y1 (en) Hardware structure of intelligent electronic device for fault detection and selective auto-reclosure

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant