KR100537217B1 - Distribution control system of separating failure of sections from distribution line and method for operating the system - Google Patents

Abstract

The present invention relates to a distribution control system consisting of a remote monitoring control device and a circuit breaker for controlling the flow of current in a distribution line, and more particularly, when a fault current occurs in the distribution line, the breaker, recloser located in the distribution line ( The remote monitoring controller maintains a system shape table in which information about each device that must transmit and receive the detection information for the fault current is recorded by the remote control and the switch, and the breaker and the recloser are maintained. ), And the switchgear receives the system configuration table from the remote monitoring and control device and transmits fault current detection information to each device by referring to the system shape table, thereby more efficiently coping with occurrence of fault current in the distribution line. It is about.

Description

DISTRIBUTION CONTROL SYSTEM OF SEPARATING FAILURE OF SECTIONS FROM DISTRIBUTION LINE AND METHOD FOR OPERATING THE SYSTEM}

The present invention relates to a distribution control system consisting of a remote monitoring control device and a circuit breaker for controlling the flow of current in a distribution line, and more particularly, when a fault current occurs in the distribution line, the breaker, recloser located in the distribution line ( The remote monitoring controller maintains a system shape table in which information about each device that must transmit and receive the detection information for the fault current is recorded by the remote control and the switch, and the breaker and the recloser are maintained. ), And the switchgear receives the system configuration table from the remote monitoring and control device and transmits fault current detection information to each device by referring to the system shape table, thereby more efficiently coping with occurrence of fault current in the distribution line. It is about.

Unlike power transmission lines, power distribution lines that supply power from substations are composed of complex trunks and branch lines, because each has to supply power to numerous customers. Therefore, when a fault current occurs due to a ground fault (when the wire is broken and grounded) or a short circuit (when the wires of different phases are stuck) on the power distribution line, a fault current is generated. It is very difficult to pinpoint the location of the fault that caused the accident.

Conventionally, when a fault current occurs in a distribution line, a substation breaker operates to find a fault point where a fault current has occurred, and the operator and the substation manager in the field mainly exchange information about the accident point using communication means. Finding faults has been a common practice. However, in the above case, a lot of time and manpower is consumed, and as the recovery time is long, the power failure time is long, which causes a lot of inconveniences to consumers.

Accordingly, when a breaker, a recloser, and a switchgear are installed in a distribution line and a fault current is detected from the distribution line, the recloser performs a line reclose operation so that the recloser is located closest to the point of failure. If it is determined that it is a recloser, the distribution line itself is opened to cope with the occurrence of the fault current.

1 is a diagram illustrating a network configuration in which a circuit breaker, a recloser, and a switch according to the prior art are installed in a distribution line.

As shown in FIG. 1, a circuit breaker 120, a recloser 130, and a switch 140 may be installed in a distribution line for supplying power from the substation 110 to the customer 150. The breaker controller 121 controls the operation of the breaker 120, the recloser controller 131 controls the operation of the recloser 130, and the switch controller 141 controls the operation of the switch 140.

In FIG. 1, a breaker 120 may be located at an initial portion of a distribution line flowing from a substation 110. When the breaker 120 opens the distribution line, the power supply may be stopped in all distribution line sections connected to the customer 150 from the substation 110 shown in FIG. 1.

The recloser 130 may be generally located in the trunk line after the breaker 120 in the distribution line. Switchgear 140 may be installed in the branch line section of the distribution line connecting the trunk line section and the customer 150. The switch controller 141, which controls the operation of the switch 140, is not equipped with a mechanism capable of performing a line reclosing operation by itself like the reclose controller 131, and receives a command from a predetermined host accordingly. Opening or closing of tracks can be performed.

In FIG. 1, when an accident occurs in a section close to the customer 150 of the distribution line and a fault current occurs, the breaker 120, the recloser 130, and the switch 140 may detect the fault current, respectively. do. In this case, when the breaker 120 and the recloser 130 are sensed, the breaker 120 and the recloser 130 are programmed to block the distribution line by themselves, so that the breaker 120 and the recloser 130 may perform an appropriate operation on the fault current.

At this time, since the breaker 120 does not perform the re-closing operation of the line unlike the recloser 130, when the fault current is sensed, the breaker 120 permanently opens the line at once. Therefore, the fault current is generated in a position close to the customer 150, but due to the opening of the line of the breaker 120, a power failure occurs in the entire section of the distribution line shown in FIG.

As such, when the breaker 120, the recloser 130, and the switch 140 located in the power distribution line generate a fault current, only the respective operation is performed to open the line. This problem is steadily occurring.

In accordance with the problems of the prior art as described above, the circuit breaker, recloser, and switchgear located in the distribution line to communicate with each other in response to the occurrence of the fault current to minimize the power failure section of the line, the breaker, the recloser, and the switch There is a demand for development of a distribution control system capable of comprehensively managing and designating a system system for operation and configuration.

The present invention has been made to improve the prior art as described above, each equipped with a communication module in the circuit breaker, recloser, and switchgear located in the distribution line, to transmit and receive the detection information on the fault current with each other when a fault current occurs By doing so, it is an object of the present invention to provide a distribution control system that minimizes an outage section of a distribution line and ensures a healthy section.

In addition, the present invention provides information on the object (breaker, recloser, or switchgear) to maintain a close cooperative relationship by transmitting and receiving the detection information on the fault current when each of the breaker, recloser, and switchgear occurs a fault current By maintaining the system shape table recorded with the system and providing it to each device, comprehensively managing breakers, reclosers, and switchgear that are complicated in a wide range of distribution lines through a remote monitoring control device, It is an object of the present invention to provide a power distribution control system that can cope with promptly and efficiently.

In order to achieve the above object and solve the problems of the prior art, the distribution control system according to the present invention, the communication with the breaker, at least one recloser (recloser) and the switch located in the distribution line section, Remote monitoring control including memory means in which a system shape table including recloser information for transmitting and receiving fault current detection information to and from the breaker and each switch information for transmitting and receiving fault current detection information to and from each breaker is recorded. Device; And communicating with the remote supervisory control device and the one or more reclosers, receiving the system shape table from the remote supervisory control device, recording the system shape table in a predetermined memory means, and detecting a fault current from the distribution line. Requesting transmission of detection information on whether the fault current is detected to at least one recloser with reference to a system shape table, and closing the distribution line when receiving the fault current detection information from the at least one recloser. And a circuit breaker to maintain the system, wherein the remote supervisory control device transmits the system shape table to the circuit breaker, the one or more reclosers, and the one or more switches.

Hereinafter, the basic operation of each component of the device that can be installed in the distribution line mainly mentioned herein will be described.

The circuit breaker (CB) may open or close the distribution line when a very large fault current is detected from the distribution line. In addition, the distribution line may be opened or closed as needed, even in the case where the normal current flows normally. Breaker referred to herein means a configuration including a breaker controller for controlling the operation of the breaker.

Unlike breakers, Load Break Switch (LBS) means a device that can open and close a line only when no current flows or a normal current flows, and cannot open and close a line by itself when a fault current occurs. The switch may be provided with a kind of control unit called a switch controller which performs the operation control. That is, the switch controller is a device that is connected to the mechanical unit of the switch to control the opening and closing of the line of the switch. However, the switch controller does not control the mechanism by judging the opening and closing of the line through the switch, and can control the mechanism by receiving a command from the host (main control device) through the communication function. The switch referred to herein means a configuration including the switch controller.

Recloser is a special type of breaker that recloses the track. If a fault current is detected from the power distribution line and continues for a certain range, the recloser opens the line and closes the line again after a predetermined time. If the fault current is still detected after the line is closed, the recloser repeats the above line reclose process by a preset number of times, and after that, if the fault current continues, the line is completely opened and no further reclose operation is performed. . Recloser referred to herein refers to a configuration including a recloser controller that controls the operation of the recloser.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

2 is a diagram illustrating an entire network configuration of a distribution control system for controlling current flow in a distribution line according to an embodiment of the present invention.

As shown in FIG. 2, according to one embodiment of the present invention, a circuit breaker 230, a recloser 240, and a switch 250 are installed in a distribution line section from the substation 210 to the customer 270. Can be. The recloser 240 and the switch 250 may be installed on the electric pole of the distribution line, respectively.

The breaker 230 may be configured to include the breaker controller 231, the recloser 240 may be configured to include the recloser controller 241, and the switch 250 may include the switch controller 251. Can be configured respectively.

The breaker controller 231, the recloser controller 241, and the switch controller 251 may each include a predetermined communication module. Through the communication module, the breaker 230, the recloser 240, and the switch 250 may communicate with each other to transmit and receive fault current detection information, and the remote monitoring controller 220 through the communication network 260. And network connection.

The communication module may include a predetermined wired communication interface for connecting a wired telephone or an optical communication network, and may include an interface for wireless communication such as Trunked Radio System (TRS), CDMA, and Air Media. In addition, the communication module may include at least one of a serial, a universal serial bus (USB), an infrared (IR) communication unit, a Bluetooth communication unit, and a mobile communication interface unit. The mobile communication interface may support PSTN connection, as well as one or more of code division multiple access (CDMA), WCDMA, ALL IP, GSM, GPRS, and all existing mobile communication-related access methods. It may be implemented to support one or more protocols of a call control protocol for VoIP call connection such as H.323, Message Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), or Megaco.

The communication network 260 may include both wired and wireless communication networks. For example, a telephone line and an optical communication network may be used as the wired communication network, and a trunked radio system (TRS), CDMA, or Air Media may be used as the wireless communication network. In the present invention, an optical communication network may be applied to the communication network 260.

In the communication between the remote monitoring controller 220, the breaker 230, the recloser 240, and the switch 250 through the communication module, a communication protocol capable of multicasting may be used. As the communication protocol, an international standard protocol may be used, or a dedicated distribution automation protocol may be used.

As the international standard protocol, a communication network protocol applied to a substation and a distribution system related to IEC 61850 (Communication Network and System in Substation) may be used.

In addition, DNP (Distribution Network Protocol) 3.0 may be used as a distribution automation dedicated protocol. The DNP 3.0 protocol is a standardized communication protocol developed to ensure compatibility between RTU-central controllers in the SCADA system, which is a centralized remote monitoring device used in the fields of power company, oil, gas and water resources. In particular, this protocol is excellent in stability and shows excellent performance in low-level communication environment, so it can be applied to SCADA environment better than the existing method, and because it is open standard, it is not a proprietary protocol belonging to a specific company. As a protocol, all privileges can be owned by user groups. IEEE recommends it as a standard for message exchange between RTU and IED, and it is introduced or prepared by related companies such as KEPCO and Gas Corporation in Korea, and it is becoming an industry standard of many vendors around the world. Can be used as

The remote monitoring controller 220 may be connected to a network through one or more breakers 230, the reclosers 240, and the switch 250 and the communication network 220 positioned on the distribution line. The remote monitoring controller 220 may be a predetermined main control device (for example, a server of the KEPCO comprehensive situation room) located at a distance from the distribution line, and is located at the substation 210 to monitor and control the distribution line. (Supervisory Control And Data Acquisition) system.

When the fault current of the distribution line occurs, the remote monitoring controller 220 is information on which recloser the breaker 230 should communicate with, and the breaker and switchgear to which the recloser 240 should communicate. Is a memory means in which a system shape table is written, each of which contains information about which breaker and switchgear and which recloser the switchgear 250 should communicate with.

In FIG. 2, one breaker 230, two reclosers 240, and two switchgear 250 are installed in a distribution line section connecting one substation 210 and one customer 270. have. However, this is only an extreme example for convenience of description, and in actual distribution line sections, many breakers, reclosers, and switchgear are installed in a tangled form like a net.

Therefore, when a fault current occurs in an actual distribution line, the breaker, the recloser, and the switchgear can easily identify themselves as a device to which the fault current detection information is transmitted / received to control or open the line or close the line. Can be.

The system shape table is data as a kind of guideline that defines a reporting system of power distribution related devices, which are complicatedly configured as a network on a power distribution line as described above. The system shape table may be connected to any circuit breaker, recloser, and switchgear located in each distribution line section to communicate with any device in response to occurrence of a fault current, according to prior investigation and research by a person skilled in the art. It may include a variety of information about whether.

In addition, the system configuration table may include information on parameters or various control mode settings for the remote monitoring controller 220 to remotely control the breaker 230, the recloser 240, and the switch 250. have. As such, the system configuration table may be prepared similarly to an organization management chart that defines a reporting system for each distribution line section.

The remote monitoring controller 220 transmits the system configuration table to all the breakers 230, the reclosers 240, and the switches 250 located in the distribution line through the communication network 260. All breakers 230, reclosers 240, and switches 250 located in the distribution line receive the system shape table from the remote monitoring controller 220 and store them in the respective memory means.

When a fault current is detected from the distribution line, the breaker 230 may request transmission of sensing information regarding whether the fault current is detected among one or more reclosers 240 located in the distribution line with reference to the system shape table. Read the closure. The breaker 230 may request transmission of the fault current detection information to at least one recloser read from the system shape table, and receive fault current detection information corresponding to the request from the at least one recloser.

The recloser 240 and the switch 250 also refer to the system shape table received from the remote monitoring and control device 220 as in the above-described operation of the breaker 230. The device may be identified and the fault current detection information may be transmitted and received with the identified device to open the line or maintain the closure.

Hereinafter, with reference to FIGS. 3 to 5, the line opening / closing operation of the circuit breaker, the recloser, and the switch for separating the fault point at which the fault current occurs when the fault current occurs in the distribution line will be described in detail.

3 is a graph showing a current value measured according to the line reclose operation of the recloser according to an embodiment of the present invention.

In general, when a fault current is detected from the distribution line, the recloser may perform a reclose operation of repeating the opening and closing of the line.

In FIG. 3, when a normal current flows in the distribution line and a fault current that exceeds the fault current threshold value is detected as in section 1, the recloser opens the line after the time allotted in section 1 has elapsed.

When the recloser opens the track, no current flows in that section of the track, so current values are not measured as in section 2. After two hours have passed, the recloser closes the track again. If the fault current is still detected as in section 3 after the track is closed again, the recloser opens the track again after three sections have passed.

The recloser repeats this re-closing process a certain number of times (7 times in Fig. 1) .If the fault current is detected continuously, the reclosing operation is no longer performed while the line is opened after 7 sections of time. Do not perform. The state after these eight sections is called a lockout state.

The fault current threshold may be variously set to an appropriate value according to the judgment of those skilled in the art. In addition, the time for the track closing section of the 1 section, 3 sections, 5 sections, and 7 sections may be variously set according to a predetermined time-current curve graph widely used by those skilled in the art. . The time for the line opening section of the second section, the fourth section, and the six section can be appropriately set by those skilled in the art in correspondence with the times of the first section, the third section, the five sections, and the seven sections.

The recloser can detect the occurrence of the fault current more accurately by repeating the opening and closing of the line as many times as described above. For example, when a branch or the like touches a distribution line, a fault current may be generated temporarily and then may be restored to a normal current. In this case, a typical breaker senses a fault current and immediately opens the line, resulting in a permanent power outage. However, the recloser can detect the fault current more accurately by detecting the normal current through the reclose operation after a certain number of times, that is, the opening of the line as described above.

FIG. 4 is a time-current curve graph illustrating a closed state holding time according to an input current of a recloser according to an embodiment of the present invention.

Referring to FIG. 3, time elapsed in a closed state such as sections 1, 3, 5, and 7 may be set by the time-current curve graph (hereinafter, T-C curve) of FIG. 4. The T-C curve is a graph showing the closing state time according to the magnitude of the current input current.

The time periods for maintaining the decommissioning sections of 1, 3, 5, and 7 may be determined according to the T-C curve, and the decommissioning retention time of each section may be determined according to different T-C curves.

In FIG. 4, graphs for four types of T-C curves are specified. In each graph, the X axis represents the measured current value against the fault current threshold value, and the Y axis represents the closing time accordingly.

Looking at the four T-C curves shown in FIG. 4, all of the time values derived for the fault current of the same magnitude may be different. That is, when a current of 200% is detected compared to the fault current threshold value, a time of 80 ms may be applied in the case of the A curve, and a time of 3 s may be applied in the case of the C curve.

That is, the recloser may operate faster than when the fault current is detected in the section where the A curve is applied, and may operate slower when the C curve is applied. Therefore, the T-C curves can be largely divided into fast curves and delayed curves. For example, in the A, B, C, D curve, the A curve is a fast curve, B, C, D curve may be a delayed curve.

In FIG. 3, different T-C curves may be applied to four sections 1, 3, 5, and 7, respectively. For example, it can be set in the form of 2F2D (2fast curve 2delayed curve), in this case, a fast curve such as curve A of FIG. 4 is applied to section 1 and section 3, and section 5 and section 7 You can apply a delayed curve, such as the C curve.

In the case described above, if a fault current is detected by applying a fast curve to sections 1 and 3, fast reclosing may be performed to determine whether the fault current is caused by a temporary cause such as tree branch rubbing. However, if the fault current is still detected after the interval, the delayed curve is applied in the 5th and 7th sections to determine whether the faulty current is caused by a permanent cause. Can be.

The recloser can initiate communication with the switch through 5 sections where a delayed curve is applied. That is, in section 5, the recloser communicates with the peripheral switches managed by the system shape table to determine which switch is the switch closest to the failure point, and section 6 (the section in which the user opens the track again). The switch closest to the failure point is controlled to open the distribution line. Thereafter, the recloser closes the distribution line again and detects a normal current instead of a fault current in the seven sections.

In other words, when the reclosing ends in the section to which the fast curve is applied and enters the section to which the delayed curve is applied, the communication process is performed with the switch that recognizes the switch closest to the point of failure. After the end of the section, the open command is sent to the switchgear that detects a fault current in the open state, and after confirming that the switchgear has opened the line, he may close the line again.

For example, when the TC curve is applied in the form of 2F2D or 1F3D, communication can be performed with the switch in 5 sections in 2F2D and 3 sections in 1F3D, and in 6 sections in 2F2D and 1F3D. In this case, the switch open command can be transmitted in four sections, and the result can be confirmed.

5 is a diagram illustrating the entire network configuration of a distribution line according to a case where a fault current occurs according to an embodiment of the present invention.

According to FIG. 5, a first current source (substation) 510 for supplying power to a plurality of consumers is located at one end of a distribution line, and the first current source 510 is connected to the distribution line through a breaker 530. Can supply current.

The remote monitoring controller 520 may be located between the first current source 510 and the circuit breaker 530. The remote monitoring controller 520 may be implemented as a SCADA system located in the substation 510. A type located far from the distribution line may be implemented as a power management main control device (for example, Korea Electric Power main control server). In FIG. 5, each device located in the distribution line is networked through a predetermined communication network.

Three reclosers 541 to 543 and nine switches 551 to 559 are positioned on the distribution line, and a second current source 440 may be positioned at the other end of the distribution line. In the recloser shown in FIG. 4, the notation is R / C, and the switch is a case in which a switch operating in a gas (Gas) switch method is used, and the notation is G / S.

When an accident occurs in the distribution line section between the switch 3 (553) and the switch 4 (554), the breaker 530, the recloser located between the failure point 560 where the accident occurred and the first current source 510 1 541 and recloser 2 542 detect a fault current. That is, the breaker and the recloser between the fault point 560 and the first current source 510 can detect the fault current. However, recloser 3543, which is not located between fault point 560 and first current source 510, is unable to detect the fault current, which means that recloser 3543 is the pick of the fault point (the load side). Is located at).

After the detection of the fault current, the recloser 1 541 and the recloser 2 542 transmit the detection information of the fault current to the breaker 530 with reference to system shape information. The circuit breaker 530 that receives fault current detection information from the recloser 1 541 and the recloser 2 542 determines that the fault point at which the fault current occurs has occurred at least after the recloser 1 541. The line opening for fault current generation is assigned to each recloser and he keeps closing the power distribution line.

In this case, if the breaker 530 does not receive the fault current detection information from any recloser, the breaker 530 is located in the interval between the breaker 530 and the recloser 1 (541). It is judged that it is possible to open the distribution line by yourself.

When the breaker 530 receives the fault current detection information from the recloser, the breaker 530 may be in a state in which the distribution line is already open, or may be in a state of maintaining the closed line, and the fault current from the recloser as described above. The distribution line may be reopened or closed depending on whether the sensing information is received.

In FIG. 5, the recloser 1 541 and the recloser 2 542 which sense the fault current perform a reclosing operation of a line, which is located farthest from the first current source 510 according to a preset program. Recloser 2 542 operates to open the track before recloser 1 541. Thereafter, the recloser 1 541 maintains the closing of the track without performing the line opening and closing operation since the normal current will be sensed again as the recloser 2 542 opens the track.

The recloser 2 542 closes the track again after a predetermined time after opening the track. Since the failure point 560 is not recovered even after the closing of the line, the recloser 2 542 detects a failure current again, and thus, may recognize that the recloser is located closest to the failure point 540. have.

As described above, the recloser 2 542 may recognize that the recloser needs to perform the line failure section separation by performing the reclosing operation of the minimum number of times. Accordingly, the recloser according to the present invention can separate the failure section more quickly.

After the recognition, the recloser 2 (542) is a fault current from the switch 3 (553), switch 4 (554), switch 7 (557), and switch 8 (558) managed by the self according to the system shape table. Receive sensing information respectively. In FIG. 5, since the fault point 560 is located between the switch 3 553 and the switch 4 557, the recloser 2 542 receives the fault current detection information indicating that the fault current is detected from the switch 3 553. do.

In addition, the switch 4 554 may receive fault current detection information indicating that the fault current has not been detected. This is the same reason why recloser 3543 does not sense a fault current as described above. As a result of reading the received fault current detection information, the recloser 2 542 determines that the fault point 560 is located in a line section between the switch 3 553 and the switch 4 554.

After determining the location of the fault point 560 as described above, the recloser 2 (542) communicates with the switch 3 (553) and the switch 4 (554), so that the switch 3 (553) and the switch 4 (554) Control to open the track. In addition, after recloser 2 542 confirms that the separation of the failure section is successful through the opening of the switches 3 553 and 4 554, the recloser 2 542 minimizes the blackout section by maintaining the closing of the track again. The health section can be secured as much as possible.

In addition, the distribution line sections of the recloser 3543 and the switch 9 559 where power supply from the first current source 510 is interrupted in accordance with the opening of the lines of the switch 353 and the switch 4 554 2 may be powered again from the current source (570).

At this time, when the switch 9 559 closes the line, the section in which the power supply is stopped through the second current source 570 may be supplied with power again. In this case, since switch 4 554 has already opened the track, no fault current flows into recloser 354 3 even if switch 9 559 closes the track.

As described above, the line opening and closing device of the present invention can minimize the power failure section and quickly recover when a fault current of the distribution line occurs. That is, by performing the line opening operation of the recloser 1 541 later than the line opening operation of the recloser 2 542, unnecessary closing of the line of the recloser 1 541 is prevented, thereby preventing the recloser 1 (regardless of the failure). The occurrence of a power failure in the section between 541 and the recloser 2 542 can be prevented.

Further, by performing communication with the switch and controlling the line opening of the switch, by separating the section between the switch narrower than the section between the recloser, it is possible to minimize the blackout section. That is, in FIG. 5, the recloser 2 542 does not open the track, but the switch 3543 opens the track so that the sections of the switch 7 547 and the switch 8 548 irrelevant to the failure section are not included. This prevents the power supply from being lost.

While specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

According to the power distribution control system of the present invention, a communication module is mounted in a circuit breaker, a recloser, and a switch located in a power distribution line, so that when a fault current occurs, transmission and reception of detection information on the fault current are performed. It is possible to obtain the effect of minimizing the number of points and ensuring the maximum health section.

In addition, according to the power distribution control system of the present invention, when a fault current occurs in each of the breaker, the recloser, and the switchgear, the object to which the self-transmits and receives the sensed information on the fault current to maintain a close cooperative relationship (breaker, recloser, Or breakers, reclosers, and switchgears, which are complex in a wide range of distribution lines, by maintaining a system shape table in which information on the switchgear is recorded and providing them to each device. It is possible to obtain an effect that can cope with current generation more quickly and efficiently.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

1 is a diagram illustrating a network configuration in which a circuit breaker, a recloser, and a switch according to the related art are installed in a distribution line.

2 is a diagram illustrating an entire network configuration of a distribution control system for controlling current flow in a distribution line according to an embodiment of the present invention.

Figure 3 is a graph showing the current value measured in accordance with the operation of the line reclose of the recloser according to an embodiment of the present invention.

4 is a Time-Current Curve graph showing a closed state holding time according to an input current of a recloser according to an embodiment of the present invention.

5 is a diagram illustrating the entire network configuration of a distribution line according to a case where a fault current occurs in accordance with one embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

210: substation (current source) 220: remote monitoring control device

230: breaker 231: breaker controller

240: recloser 241: recloser controller

250: switch 251: switch controller

260: communication network 270: customer

Claims (6)

In the distribution control system for controlling the current flow in a predetermined distribution line section, And a recloser information and each recloser for communicating with a breaker, at least one recloser and a switch located in the distribution line section, and transmitting and receiving the breaker and fault current detection information when a fault current of the distribution line occurs. A remote monitoring control device including a memory means in which a system shape table including each switch information for transmitting and receiving fault current detection information is recorded; And The system performs communication with the remote monitoring control device and the at least one recloser, receives the system shape table from the remote monitoring control device, records the system shape table in a predetermined memory means, and detects a fault current from the distribution line. By referring to the shape table, requesting transmission of detection information on whether the fault current is detected to at least one recloser, and closing the distribution line when receiving the fault current detection information from the at least one recloser. Maintaining circuit breaker Including, And said remote monitoring control device transmits said system shape table to said breaker, said at least one recloser, and said at least one switch. The method of claim 1, The one or more reclosers and the one or more switchgear receive the system shape table from the remote monitoring and control device and record the system shape table in a predetermined memory means, and when a fault current occurs in the distribution line, the system shape table is referred to itself and the And a breaker, a recloser, and a switch to which fault current detection information should be transmitted and received. The method of claim 1, And the circuit breaker opens the distribution line when the fault current detection information is not received from the at least one recloser for a predetermined time. The method of claim 1, The at least one recloser which has transmitted the fault current detection information to the breaker performs a reclose operation of the distribution line, so that the recloser is located closest to the point of failure of the distribution line at which the fault current occurs. Whether it's a closure, The first recloser determined to be located closest to the failure point requests transmission of detection information on whether the failure current is detected by using at least one switch with reference to the system shape table, and responds to the request. The failure point is determined to be located in a section between the first switch transmitting the sensed information and the second switch close to the first switch, so that the first switch and the second switch to open the distribution line. Distribution control system, characterized in that. The method of claim 1, The remote monitoring controller, the breaker, the one or more reclosers, and the one or more switches each comprise a predetermined communication module, Wherein each communication module network-connects the remote monitoring controller, the circuit breaker, one or more reclosers, and one or more switches via a predetermined communication network. The method of claim 5, The communication module is a power distribution control system, characterized in that for supporting the IEC 61850 communication protocol.