KR101398147B1 - An Automatic Fault Processing System and Method of a Power Distribution System by using Inter-communications among Multifunction Terminals - Google Patents

Abstract

The present invention relates to a system and a method for automatic failure handling of a power distribution system using mutual communication of a multifunctional terminal apparatus and, in the event of a failure in a power distribution system, a fault current is supplied from a main transformer of a power distribution substation, At this time, the multifunctional terminal device cooperates with the protection device which cuts off the fault, calculates the voltage / current to the distribution line obtained from the switch, detects the fault occurring from the point of failure to the point of time when the protection device blocks the fault, (FI / Fault Indicate) data, automatically send and receive data to and from each other to automatically isolate the fault section, automatically switch on the switch of the normally open point, and automatically restore power to the unhealthy section To the automatic handling of faults in the distribution system.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fault processing system and method for a power distribution system using mutual communication between a multi-

The present invention relates to a system and a method for automatic failure handling of a power distribution system using mutual communication of a multifunctional terminal apparatus and, in the event of a failure in a power distribution system, a fault current is supplied from a main transformer of a power distribution substation, At this time, the multifunctional terminal device cooperates with the protection device which cuts off the fault, calculates the voltage / current to the distribution line obtained from the switch, detects the fault occurring from the point of failure to the point of time when the protection device blocks the fault, (FI / Fault Indicate) data, automatically send and receive data to and from each other to automatically isolate the fault section, automatically switch on the switch of the normally open point, and automatically restore power to the unhealthy section To the automatic handling of faults in the distribution system.

If a fault occurs in the current distribution system, the fault current supplied from the main power source of the distribution substation is cut off by protective devices (multi-circuit breaker, leak roger, etc.) and the fault shutdown event is transmitted to the central control device of the distribution automation system. At this time, if the protection device blocks the fault, the terminal device for the switching device installed between the protection device and the fault point calculates the voltage / current data supplied from the switch to recognize the fault, Moment, and date), and transmits it to the central control unit. The operator of the distribution automation system analyzes this data to determine the fault zone, disconnects the fault zone from the power distribution system by opening the shutters at both ends of the fault zone, and inserts the normally open point switch connected to the other power source, The power is supplied to the section experiencing the power failure.

At this time, the operator of the distribution automation system takes a considerable amount of time to process the power distribution system. Firstly, it is a communication medium for transmitting a failure display event to a central control device by a terminal device of a protective apparatus or a terminal device of a switchgear. Currently, the communication network of distribution automation system mostly uses optical communication, but there are still sites using KT dedicated line or even wireless communication (TRS, CDMA), so in order to transmit the event of each terminal device to the central control device, It takes a few minutes. Also, if the system operator issues a command to each terminal device, it takes a long time for this data to reach the terminal device. Second, due to the influence of such a communication medium, each terminal device does not transmit immediately when an event occurs but adopts a method of collecting and transmitting events after several seconds. Third, when these events are transmitted to the central control device, the system operator checks the time required to determine the fault section, the time to operate the relevant switch to isolate the fault section, whether the switch disconnects the fault section, It is necessary to operate the protective device operation time and the open / close operation time of the normally open point in order to transmit the electric power to the section experiencing the open time. Also, when there are many open points at all times (most of them have more than three links), it is also time consuming for the system operator to select appropriate open points. For this reason, it takes a lot of time for the system operator to deal with the failure of the power distribution system. As a result, the electric power company (KEPCO) is damaged by the power supply (electric power that can not be supplied), and since the electric power is not supplied for a long period of time, the power quality is detrimental to the electric power quality.

Korean Registration No. 10-0683246 is related to a distribution automation system and a fixed wireless bridge communication device for the system, and includes a system for transmitting and receiving a distribution automation control signal through a wireless communication device having a fixed wireless bridge function, To a configuration of the apparatus.

Korean Registration No. 10-0683246 has a similarity with the present invention in that it forms a network of distribution automation system based on optical communication network and expands distribution automation area using wireless bridge communication.

However, the present invention provides a technique for rapidly communicating communication between multi-function terminals by using existing optical communication facilities as they are, thereby enabling failure detection and failure processing to proceed quickly. On the other hand, Korean Registration No. 10-0683246, There is a difference in that the network of the distribution automation system is constituted by using the fixed network bridge communication in place of the optical network in order to use the optical communication network only as the backbone and the other network configuration. That is, unlike Korean Registration No. 10-0683246, which uses fixed wireless bridge communication instead of optical communication network in order to reduce cost, the present invention can not only reduce costs but also waste equipment by using installed optical communication facilities, There is an additional function in that it enables fast and accurate identification of the fault section through the data communication of each of the / underground use algorithms and processing of the fault section.

Korean Patent Registration No. 10-0920945 is directed to a system and method for determining a failure occurrence position of a distribution line, and more particularly, to a system and method for determining a failure occurrence position of a distribution line, using a failure detection received from at least one failure detector located on a distribution line, And to an apparatus and method for determining an accurate position. Korean Registration No. 10-0920945 is similar to the present invention in that a fault occurrence location is detected based on a current direction and a fault region is automatically separated when a fault is detected.

However, according to the present invention, a failure section is automatically identified through a check on a fault current, the corresponding section is automatically separated, an automatic open / close is performed automatically at an open point, and optical communication between the multi- While Korean Register No. 10-0920945 can simply use the position of the detector with respect to the direction of the current to detect the fault and to detect the fault without recognizing the fault The difference is that the fault location is identified through the position difference of the period. That is, according to the present invention, communication between multifunctional terminal devices can be performed quickly by applying an optical communication network, and fault information can be automatically detected by grasping data transmitted and received, It has additional functions compared to Korean Registration No. 10-0920945 in that it is possible.

In order to solve these problems, various methods have been explored and applied by using the distribution automation system.

First, system operators to remotely operate protective devices and switchgear in order to deal with faults occur when a temporary accident occurs in the power distribution system. In order to shorten the time, in the case of switchgear terminal devices, The fault display data is transmitted to the central control device after determining the fault type as the date and time FI. However, the function of the fault display data is improved so that the terminal device for the breaker transmits a fault display event at the time of fault, After giving the time to prepare for the fault handling so that it can be recognized, if it is judged as the temporary FI, the fault type is transmitted at that time. For example, the temporary FI judgment condition can be judged as a temporary FI if the voltage without voltage exceeds the set value of the fault judgment setting value (Default: 20 seconds) or more.

The second section nulliser function is modified to implement the function in the terminal device for the switchgear so that the terminal device which experiences the failure in cooperation with the protective device and the voltage-free terminal device is automatically opened at the time of the protection device reclosing, .

Third, the subway distribution system is closed loop, all the monitoring and distribution devices of all lines are composed of multi circuit breakers, and the CCD (closed loop system control terminal) can be used to block only the fault section without power failure System.

Fourth, by implementing an automatic fault-handling algorithm in the central control unit, the fault-related data sent from each terminal unit is collected and the program can automatically handle the fault without judgment or command of the operator separately.

Fifth, the system operator transmits the direction information of the fault current to prevent the human error so that it can easily determine the fault region.

The power supply of the healthy section using the fault section separation (reduction) and the normally open point for the switchgear during the failure of the power distribution system is performed by the system operator in a passive concept although the power distribution automation system is used. The unnecessary long power failure time is experienced due to the failure. In order to solve this problem, we propose a much more economical and stable method that can automatically deal with faults by mutual communication between on-site terminals by using and modifying existing commercialized products without resorting to system operator.

In order to accomplish the above object, there is provided a method for processing an automatic failure of a power distribution system using mutual communication of a multifunctional terminal device of the present invention, comprising: recognizing a fault section using inter- Automatically separating the fault section in cooperation with the protective device of the rear side (power source side); And automatically turning on the normally open point to supply power to a section that experiences unnecessary power failure due to a fault; And a control unit.

Here, the step of automatically separating the fault section and automatically supplying the power to the section where unnecessary power failure is experienced due to the failure by automatically inputting the normally open point does not depend on the system operator, It is able to deal with the fault automatically by communication,

The multifunctional terminal device transmits a fault display event at the time of fault and allows the system operator to quickly recognize the fault in the power distribution system so that it can prepare for the fault handling. However,

The condition for determining the date and time FI is a date and time FI if the no-voltage is maintained for more than the set value (Default: 20 seconds)

The multifunctional terminal device experiences a failure by cooperating with the protection device, and the multifunctional terminal device in which no voltage is generated is automatically opened at the protection device reclosing time so as to reduce the failure interval without a command of the system operator,

The multifunctional terminal device experiences a failure by cooperating with the protection device, and the multifunctional terminal device in which no voltage is generated is automatically opened at the protection device reclosing time so as to reduce the failure interval without a command of the system operator,

The power distribution system is closed loop, all the monitoring and distribution devices of the line are composed of multi circuit breakers, and only the fault region can be blocked without power failure by using CCD (control terminal for closed loop system)

The fault-related data sent from the multifunctional terminal device can be collected and can be automatically processed without judgment or instruction of the operator separately,

The system operator transmits the direction information of the fault current so as to facilitate the determination of the fault section to prevent human errors,

The power distribution system may be a distribution system for the processing line or a distribution system for the underground line.

In order to achieve the above-mentioned object, an automatic failure handling system for a power distribution system using mutual communication of a multifunctional terminal device according to the present invention comprises: a multifunctional terminal device having a plurality of serial ports; A WSCU (Wavelength Division Multiplexing / Wavelength Division Multiplexing) based Serial Converter Unit (WSCU) for performing mutual communication between multifunctional terminal devices by using an optical cable provided for communicating with a host device; And a DWB (DAS Wireless Bridge) wireless communication device for communicating with the multi-function terminal device on the branch line,

The multifunctional terminal device recognizes a fault section by using inter-device communication with its inherent function and automatically separates the fault section by cooperating with the protective device at the power source side (power source side) and automatically inserts the normally open point, Power can be supplied to a section experiencing a power failure.

Here, the WSCU converts the serial data into an optical signal so as to enable communication between the terminal devices for implementing the algorithm using the optical line provided for communication between the host device and the host device, ≪ / RTI &

The DWB is a wireless communication device that receives serial data of a terminal device and wirelessly transmits the serial data, and it is possible to perform processing or communication between terminal devices in the underground distribution line using the DWB.

The present invention relates to a method for processing an automatic failure of a power distribution system using mutual communication between multifunctional terminal apparatuses, and more particularly, The fault can be processed automatically, which is much more economical and stable.

1 is a configuration diagram of a multifunctional terminal device and a WSCU interface according to the present invention.
2 is a configuration diagram of a multifunctional terminal device and a DWB interface according to the present invention.
3 is a configuration diagram of a multifunctional terminal device according to the present invention applied to a machining line.
4 is a configuration diagram of a multifunctional terminal device according to the present invention applied to an underground line.
5 is an explanatory diagram of an operation of a multi-function terminal device according to the present invention with respect to a processing line algorithm.
6 is an explanatory diagram of an operation of an underground line algorithm according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a method for processing an automatic failure of a distribution system using mutual communication of a multifunctional terminal device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a configuration diagram of a multifunctional terminal device and a WSCU interface according to the present invention, and FIG. 2 is a configuration diagram of a multifunctional terminal device and a DWB interface according to the present invention.

The configuration for the communication between the terminal devices in the field is performed by a multifunctional terminal device having a multi (three or more) serial port and a mutual communication between the multifunctional terminal devices using the optical cable provided for communicating with the host device (Wavelength Division Multiplexing) -based Serial Converter Unit (WSCU) and DWB (DAS Wireless Bridge) wireless communication equipment for communication with multi-function terminal devices on the branch line.

The multifunctional terminal device recognizes the fault section by using the inter-device communication with the inherent function and automatically separates the fault section by cooperation with the protection device on the power side (power source side), automatically inserts the open point, An algorithm capable of supplying power to a section experiencing the power consumption can be additionally implemented.

The WSCU converts serial data to optical signals so that it can communicate between terminals for implementing algorithms by using the optical line provided for the communication between the master device and the terminal device, and transmits the optical signal at a wavelength different from that of the host communication (1510 nm) So that data can be transmitted.

The DWB is a wireless communication device that receives serial data of a terminal device and wirelessly transmits it, and can utilize the DWB to enable communication between terminal devices of a branch line to a processing distribution line.

FIG. 3 is a configuration diagram of a multifunctional terminal device according to the present invention applied to a processing line, and FIG. 4 is a configuration diagram of a multifunctional terminal device according to the present invention applied to an underground line.

Hereinafter, the operation of the algorithm according to the present invention will be described.

First, the bit allocation of the data frame for 1: 1 communication is as shown in [Table 1].

7 6 5 4 3 2 One 0 52B DTT IT PT PC Echo PT
Echo PC Address Address

SET / RESET condition of each bit data will be described as follows.

1) The PT is set at the time of occurrence of FI (no voltage) after judgment of forward direction, and it is activated when it is live or it generates an open signal to its switch or BT reception. When using a logical port, if any port receives BT, both PTs are reset.

2) Echo PT is set when PT is above EDT (Echo PT / PC Delay Time) with 00 (input), 80 (open), and PT set. Echo PT is reset when any port receives BT before EDT.

3) BT is set at the time of FI occurrence (no-voltage) after the reverse judgment, and if PT is received in BT state, BT is set again after EDT. It can also be a live wire, generate an open signal at its switch, or be reset at PT reset.

4) DTT is set to Echo PT receiving port after maintaining Echo PT reception more than ODT. In case of Trip Fail, it is set to both ports after TFT and RESET is done after 1 second in port receiving 52B.

5) The PC is set to ON after the CWT has elapsed while the PC is open. It is set to the opposite port from which the PC was received. However, if the port that receives PT or DTT does not set the PC when the PC Set condition, the terminal device with FI Logic in operation does not deliver PC, When the PC does not transfer. Also, do not set the PC when the port to be set in the PC is a communication failure (including the logical port). When a live signal or a PC is not received, when a closing signal is generated on its own switch, it is reset when PCHT is completed.

6) Echo PC is opened by DTT reception. When EDT or more PC is received, Echo PC is received. If the received port is PC, then PC is set after CWT is completed. If not, the opposite port will be set to SET (except the terminal device in which FI Logic is in operation). It is RESET when it is live or not receiving PC.

7) 52B is SET when released, and RESET is turned on.

The following table shows the addressing for each port for the processing algorithm shown in FIG.

11 10 01 00 L S2 S1 R

Here, R and L represent physical ports, and S1 and S2 represent logical ports. Below is a description of the START & RESET condition for the internal timer of the processing terminal device algorithm.

1) BDT (Backup Delay Time) starts when the communication is in the normal state, and when the communication is active, it is activated, when it is live, when the PT is reset, when the echo PT is received, and when the BDT is completed. When the BDT is completed, its switch is tripped, DTT is set to the port where the PT is set, and when the TFT starts and the logic logic is used, the switch is tripped based on the point at which the BDT is completed before the BDT is completed. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 3.0s (ODT + EDT).

2) ODT (Open Delay Time) starts when Echo PT is received in the PT state, and is reset when the Echo PT is not received, when the ODT is completed, when the PT is not generated, or when the Echo PT is not received. At the completion of ODT, it trips its own switch, DTT set to Echo PT receiving side, and TFT starts. When logic logic is used, the switch is tripped based on the point at which ODT is completed first. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 1.0s.

3) CWT (Close Wait Time) is in the open state & START in one diagonal line, it is one diagonal line, it is RESET when CWT is completed, PT reception, DTT reception. At the completion of CWT, PC Set is set as follows and PCHT Start is performed. 3-1) When Reference Port is set to R, PC SET is set to L Port if it is on the power line side, and PC SET is set on R Port when it is on the load side. 3-2) When the reference port is set to L, PC SET is set to R port if it is on the power supply side, and PC SET is set on L port if it is on the load side. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 10.0s.

4) CDT (Close Delay Time) starts when Echo PC is received while PC is set after the completion of CWT, and is reset when PC is reset, Echo PC is not received when CDT is completed. At the completion of the CDT, his / her switch is closed. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 1.0s.

5) TFT (Trip Fail Time) generates an open signal at its own switch, starts at the time of DTT reception, and is reset at the time of TFT completion when receiving its switch open signal. DTT is set on both sides at the completion of the TFT. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 3.0s (more than the internally processed open failure time).

6) CFT (Communication Fail Time) is started at communication failure & PT SET, RESET at live and CFT completion. At the completion of the CFT, it trips its switch and starts TFT. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 7.0s.

7) EDT (Echo PT / PC Delay Time) starts when receiving PT / PC. When the port receiving PT is the reference port, when the load side is active, when the port receiving PT is not the reference port, , And is reset when EDT is completed. When the logical port is used, EDT Reset (Echo PT not transmitted) is received when receiving PT and BT respectively. Echo PT / PC set at EDT completion time. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 0.1s. However, the terminal device that bypasses does not count EDT Time.

8) PCHT (PC Hold Time) starts at PC SET (Time Start only when CWT started terminal), RESET at live, PC RESET and PCHT completion. PC reset at the completion of PCHT. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 2.0s (CDT + EDT).

The setting values are as follows.

Functions are divided into enable and disable, and reference ports are R and L. Logical Sub Port (S1, S2 Port data determination, not used when set to None) is divided into S1: R, L, None and S2: R, L, None. For example, if S1 is set to R , S1 Port data is transmitted together with the R port data.

The receive processing port is R: R, L, S1, S2; L: R, L, S1, S2; S1: R, L, S1, S2; S2: It is divided into R, L, S1, and S2. In case of communication failure, it is open select (Comm Fail Open Select). Open is opened after CFT. When the logical port is used, all of the logical ports are applied when the communication fails.

Referring to FIG. 3, the transmission / reception port setting is as shown in [Table 3] and [Table 4].

1) Data transmission port setting Setting value #One #2 # 5 Refer Port R R R S1 Port R None L S2 Port None L None

2) Data reception port setting Setting value #One #2 # 5 L Port - L (03) L (03) R Port S2 (10) L (03) L (03) S1 Port S1 (01) - S1 (01) S2 Port - R (00) -

[Table 5] summarizes the processing and conditions of other opening and closing failures.

1) Opening and closing failure process: It is treated the same as input and opening of multi-function terminal device. If the opening signal of opening / closing signal is not received within 2 ~ 3 seconds (internally fixed time) To the master.

2) Opening and closing conditions

- Open condition

Condition Contents Remarks

Communication normal When communication is normal PT SET
Echo PT reception after EDT completion
ODT completed







DTT reception When communication is normal PT SET
Not receiving Echo PT
BDT completed Communication failure If communication fails, PT SET
CFT completed
Blocking failure Open signal generation
The open state signal is not received during OFT completion
DTT transmission to both nearby switches

- Input conditions: ① Open & both sides, ② PC set after one slant & CWT completion, ③ Echo PC reception after EDT completion, ④ CDT completion

The BIT SET & RESET condition of the data frame for the underground line is shown in [Table 6].

7 6 5 4 3 2 One 0 52B DTT IT PT PC Echo PT
Echo PC Address Address

1) PT is set at the time of occurrence of FI (no voltage) after judgment of forward direction, and when BT signal is open, it is RESET when receiving open signal.

2) Echo PT is set at 00 (input), 80 (open), and when PT is more than EDT (Echo PT / PC Delay Time).

3) BT is set at the time of occurrence of FI (no voltage) after judgment of reverse direction. If PT is set even if one of the remaining 3 circuits is set at the time of live wire, do.

4) DTT is set when the Echo PT reception is maintained over ODT, by Trip Fail, when all circuits are tripped, DTT is sent to the link circuit (all trips when trip fail). When live, 52B is received, it is RESET after 1 second.

5) PC is set to Port (circuit) which becomes a line after CWT has elapsed when one circuit is diagonal in the state of live line & one circuit is open in all two circuits set as a link circuit. SET (transfer) to the opposite (physical) port (circuit) receiving the PC. If the port (circuit) receiving the PT or DTT is in the PC Set condition, it does not set the PC and does not transmit it. Circuits in which FI Logic is active should not be transmitted to the PC. PC does not transmit when PC is set, or when the port (circuit) to be transmitted to the PC is failed to communicate to receive the PC (if both circuits are assigned to one port and the receiving processing port is not set to No, Set or deliver PC only when both circuits are communicating). When live signal is not received from PC, when input signal is generated to its own switch, it is reset when PCHT is completed.

6) When there is a circuit opened by DTT reception, Echo PC is set to Port (circuit) received when receiving EDT over PC in addition to open port (circuit). When Echo PC is received, the received port is set to the opposite port (circuit) if the PC is set and the received circuit has not set the PC after completing the CWT. Circuits with FI Logic active are not Echo PC. Echo PC is not used for terminals of circuits that have received DTT but are not open. When live, it is reset when PC is not received.

7) 52B is SET when released, and RESET is turned on.

In the communication port setting for the in-process algorithm, the functions are divided into enable and disable, and the addressing for each circuit (when used in conjunction with the processing) is shown in Table 7.

11 10 01 00 4 circuits (L) 3 circuit (S2) 2 circuit (S1) 1 circuit (R)

The transmission physical ports for each circuit are as follows. 1 circuit: R, L (Default: L); 2 circuits: R, L (Default: L); 3 Circuit: R, L (Default: R); 4 Circuit: R, L (Default: R); If more than two circuits are selected in one port, the error message is not stored after being processed (Error: Port Over Selected).

The reception processing port is as follows. 1 circuit: No, 1 circuit, 2 circuits, 3 circuits, 4 circuits (Default: 4 circuits); 2 circuits: No, 1 circuit, 2 circuits, 3 circuits, 4 circuits (Default: No); 3 circuits: No, 1 circuit, 2 circuits, 3 circuits, 4 circuits (Default: No); 4 circuits: No, 1 circuit, 2 circuits, 3 circuits, 4 circuits (Default: 1 circuit); The circuit set to No should not handle communication failure.

The connection circuit selection (for PC transmission) is as follows. 1 circuit, 2 circuits, 3 circuits, 4 circuits (Default: 1 circuit, 4 circuits); However, you can not set the circuit for which the 'Receive Port' is set to 'No'.

Referring to FIG. 4, the setting values of the transmission physical port and the reception processing port for each circuit are as shown in [Table 8] and [Table 9].

1) Physical port for each circuit Setting value #One #2 # 3 #4 1 circuit L L L L 2 circuits - - - - 3 circuits - - - - 4 circuits R R R R

2) Receive processing Port Setting value #One #2 # 3 #4 1 circuit R R R R 2 circuits - - - - 3 circuits - - - - 4 circuits L L L L

When communication failure occurs, the open selection (ComFail Open Select) is as follows. Not Open: If communication fails, PT will not open after CFT (Default). Open: Open after CFT. When the logical port is used, all of the logical ports are applied when the communication fails.

The following is a description of the START & RESET condition for the in-service terminal device algorithm internal timer of FIG.

1) BDT (Backup Delay Time) is started when communication is in normal state and when PTT is active, when it is active, when PT is reset, when Echo PT is received, and when BDT is completed. At the completion of the BDT, the magnetic circuit breaker is tripped, DTT is set to the circuit where PT is set, and the TFT starts. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 3.0s (ODT + EDT).

2) ODT (Open Delay Time) is the time when the magnetic circuit starts to receive Echo PT in PT state, does not set as a link circuit, does not receive Echo PT in the circuit where reception processing port is set to No If there is no count, DTT is not set. At live, when ODT is completed, when PT does not exist, when Echo PT is not received, it is RESET. At the completion of the ODT, the magnetic circuit switch is tripped, DTT is set on the Echo PT circuit, and the TFT starts. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 1.0s.

3) CWT (Close Wait Time) is started when the two circuits set in the link circuit are open in the live state & 1 open, and when the one circuit is oblique, the diagonally connected port (circuit) is started. When the circuit is live, CWT is completed, PT is received, and DTT is received. At the completion of CWT, set the PC to the shaded port (circuit) and start PCHT. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 10.0s.

4) CDT (Close Delay Time) is started when Echo PC is received while PC is set after CWT is completed, and is reset when PC is reset, when Echo PC is not received. At the completion of the CDT, the circuit selected as the link circuit is put into the open circuit switch. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 1.0s.

5) TFT (Trip Fail Time) starts when DTT is received when open signal is generated in magnetic circuit switch, and is reset when TFT open signal is received. All circuits are tripped at the completion of the TFT, and DTT is transmitted to the interconnection circuit when the entire circuit is tripped. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 3.0s (more than the internally processed open failure time).

6) CFT (Communication Fail Time) is started at communication failure & PT SET, RESET at live and CFT completion. When the CFT is completed, the magnetic circuit breaker is tripped and the TFT is started. If the receive processing port is set to No, it is not processed by the CFT. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 7.0s.

7) EDT (Echo PT / PC Delay Time) is used to start PT / PC reception (only Echo PT or Echo PC should be counted) do. Echo PT / PC set at EDT completion time. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 0.1s.

8) PCHT (PC Hold Time) is started when PC SET (Time start of CWT only), RESET upon live, PC RESET, and PCHT completion. PC reset at the completion of PCHT. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 2.0s (CDT + EDT).

9) IFDT (Inner Fault Delay Time) is the state in which the magnetic circuit is in the BT state and all the other circuits start when the PT is not generated, and when the live phase is completed, when the IFDT is completed IFDT Reset). At the completion of IFDT, all circuit switches are tripped, TFT starts, and when the entire circuit trips, the link circuit transmits DTT. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 1.0s.

10) Branching Circuit Fault Time (BCFT) is the time when a circuit (or both circuits) selected as a link circuit is in the BT state and the branch circuit itself is in the PT state (if one circuit of the link circuit is PT, After PT is reset, it is started. When it is active, it is RESET when BCFT is completed. At the completion of BCFT, the magnetic circuit breaker is tripped and the TFT starts. The time range is from 0.0s to 180.0s, the step is 0.1s, and the default is 3.0s.

11) In case of addition (always open point input), the connected circuit becomes a diagonal line, and when it is opened by DTT, the open circuit which is opened is inputted after CWT.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be resorted to without departing from the scope of the appended claims.

10: Multifunctional terminal device
20: WSCU (Wavelength Division Multiplexing (WDM) -based Serial Converter Unit)
30: DWS (DAS Wireless Bridge) wireless communication equipment

Claims (11)

A method for automatic failure handling of a power distribution system using mutual communication between multifunctional terminal apparatuses,
Transmitting and receiving data on a fault current direction between terminal devices to recognize a fault section;
And automatically disconnecting the fault section in cooperation with the protection device of the fault side (power source side) if the faultless voltage is maintained for a predetermined time or more after the fault section is recognized, And
Automatically turning on the always-open point so that power can be supplied to a healthy section experiencing unnecessary power failure due to a failure
And an automatic failure handling method of the power distribution system.
delete The method according to claim 1,
Wherein said separating comprises:
And opening the switch and the adjacent switch in response to the reclosing time of the protective device to separate the fault section.
delete The method according to claim 1,
Wherein the failure section can be reduced by using the switch even when the power distribution system is a closed loop.
The method according to claim 1,
Transmitting a fault event to the central control unit when a fault is recognized; And
Further comprising the step of determining a fault type after transmitting the fault event.
The method according to claim 1,
Automatic failure handling method of distribution system applicable to processing distribution system
The method according to claim 1,
Automatic fault handling method of distribution system applicable to underground distribution system
1. An automatic fault handling system for a distribution system using mutual communication of a multifunctional terminal apparatus,
The terminal device recognizes a fault section by transmitting / receiving data on the fault current direction between the terminal devices, and if the voltage section is maintained for a predetermined time or more after experiencing the overcurrent and recognizes the fault section, A multifunctional terminal device which automatically separates a fault section and automatically inputs an always-open point so as to supply power to a healthy section that experiences unnecessary power failure due to a fault;
WSCU (Wavelength Division Multiplexing (WDM) -based Serial Converter Unit) for transmitting and receiving data between multifunctional terminal devices using optical cables provided for communicating with a host device; And
DWB (DAS Wireless Bridge) wireless communication equipment that transmits / receives data to / from a multi-function terminal device of a branch line
And an automatic failure handling system of the power distribution system.
10. The method of claim 9,
Wherein the WSCU transmits and receives data between the multifunctional terminal apparatuses using wavelengths different from the wavelengths used for communication with the host apparatus.
10. The method of claim 9,
And the DWB receives the serial data of the multi-function terminal device of the branch line and wirelessly transmits the serial data.

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