KR20180043059A - Fault treating mathod of distribution line - Google Patents

Abstract

Disclosed is a distribution system failure management method. The distribution system failure management method comprises the steps of: allowing a terminal device to receive suppliable capacity from a plurality of normally open points; allowing the terminal device to recognize a failure section through power supply data communication; separating the failure section; allowing the terminal device adjacent to the failure section to compare the suppliable capacity from the plurality of normally open points and select an insert normally open point; and inputting the insert normally open point to the failure section.

Description

{FAULT TREATING MATHOD OF DISTRIBUTION LINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a power distribution system failure handling method, and more particularly , to a power distribution system failure handling method that inputs a normally open point when a failure occurs in the power distribution system.

If a fault occurs in the power distribution system, the fault current supplied from the main power source of the distribution substation is cut off by the protective device (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 switchgear installed between the protection device and the fault point calculates the voltage / current data supplied from the switch to recognize the fault, and when the voltage becomes non-voltage, / Moment, date and time) and transmits it to the central control unit.

The operator of the distribution automation system analyzes the data to determine the fault section, disconnects the fault section from the power distribution system by opening the switch at both ends of the fault section, 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, there is a problem that the operator of the distribution automation system takes a long time to process the failure in the power distribution system. In addition, this causes electric power damages which can not supply electric power to be supplied, and damages in terms of electric power quality because the electric power is not supplied for a long period of time from the customer's point of view.

For example, the present invention provides a fault processing method for detecting a fault location without operator's judgment and then inputting the fault location to the normally open point to shorten the fault time and minimize the power failure period.

A method for processing a power distribution system failure according to an embodiment of the present invention includes: receiving a supplyable capacity from a plurality of normally open points; The terminal device recognizing a fault interval by power supply data communication with each other; Separating the fault section; The terminal apparatus adjacent to the failure section compares the available capacity of the plurality of normally open points to select an inserted normally open point; And injecting the closing normally open point into the fault section.

Wherein the step of injecting comprises:

And comparing the used capacity of the terminal apparatus adjacent to the failure section with the available capacity of the charged normally open point and inputting the charged normally open point.

If the charging normally open point is inserted in the fault section, it can be excluded from the normally open point when another fault section occurs.

When the supply allowable capacity of the input normally open point is larger than the used capacity of the terminal apparatus adjacent to the failure section, the closing normally open point can be input.

The closing normally open point may be a normally open point having a large supplyable capacity out of the plurality of open points.

The disconnecting step may include disconnecting the fault section by opening the switch connected to the terminal apparatus adjacent to the fault section.

According to the power distribution system failure processing method according to the embodiment, when the failure occurs, the input normally open point is selected according to the supplyable capacity of the normally open point, and the used capacity is compared and inputted, A failure process can be performed.

In addition, it is possible to provide a much more economical and stable effect by automatically handling failures by mutual communication among the terminal devices in the field.

FIG. 1 is a diagram illustrating an open / close device, a terminal device, a wireless bridge for distribution automation (DWB), and a WDM-based serial converter unit (WSCU) according to an embodiment of the present invention
2 is a steady-state power distribution system according to an embodiment of the present invention.
FIG. 3A is a power distribution diagram separated from a fault section according to an embodiment of the present invention. FIG.
FIG. 3B is a distribution system diagram after the input open phase time is inserted after the failure.
4 is an explanatory diagram of a failure processing method according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

FIG. 1 is a diagram illustrating a switch, a terminal device, a DAB wireless bridge (DWB), and a WDM base serial converter unit (WSCU) according to an embodiment of the present invention.

The switch G can control whether or not the power source is supplied, and can receive a control signal indicating whether the terminal device 20 is open or closed.

The configuration for communicating between the terminal devices 20 includes a multifunctional terminal device 20 having a plurality of (three or more) serial ports and a multifunctional terminal device 20 using a communication cable provided for communicating with the host device 20 Based serial converter 30 (WDM (Wavelength Division Multiplexing) -based serial converter unit (WSCU)) which enables the parallel communication with the other multifunctional terminal device 20 to be performed in parallel with other multifunctional terminal devices 20 And a wireless bridge 40 (DAS Wireless Bridge, DWB) for automation.

The multifunctional terminal device 20 recognizes the fault section by using the communication between the terminal devices 20 and automatically separates the fault section in cooperation with the protection device on the power source side and inputs the normally open point, Power can be supplied to a section experiencing a power failure.

The WDM-based serializer 30 can communicate between the terminal device 20 using a master line and a communication line provided for communication between the master device 20 and the master device. For example, optical communication using an optical modem can be performed.

The wireless bridge 40 for distribution automation receives serial data of the terminal device 20 and provides wireless communication to perform communication among the other terminal devices 20, for example.

In addition, the terminal device 20 can use an Ethernet-based transmission control protocol / internet protocol (TCP / IP) as a network protocol for communication between the host device 20 and other terminal devices. However, the present invention is not limited thereto, and various communication methods can be applied.

Hereinafter, a failure of the power distribution system according to the embodiment of the present invention will be described.

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

7
6
5
4
3
2
One
0
AI1 Data
AI2 Data
52B
DTT
IT
PT
TSC
Echo PT
address
address
2byte
2byte

The SET / RESET condition of each bit data is as follows.

1) PT is set at the time of occurrence of fault detection (FI) after normal judgment (no voltage), it is live, or it generates an open signal to its switch or is reset when receiving BT. When using a logical port, if any port receives BT, both PTs can be 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 backward determination, and when PT is received in the 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 Echo PT reception is maintained over ODT. In case of Trip Fail, it is set to both ports after TFT, and after 1 second, it is RESET in live port or port receiving 52B.

5) The TSC (Tie Switch Close) is set to ON by the DTT reception, and the input signal is set to the normally open open-close switch. When the TSC signal is received, the closing normally open-circuit switch is RESET after the input.

6) 52B is SET when open and RESET when it is ON.

7) AI1 Data provides the currently measured load to the terminal unit connected to the line or provides the available supply capacity of the normally openable input to the A distribution line.

8) AI2 Data provides the available supply capacity of the normally open point for the B distribution line.

The following describes the start and reset conditions of the terminal apparatus.

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.

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.

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 ReferencePort 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.

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.

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.

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.

 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.

8) PCHT (PC Hold Time) starts at PC SET (Time Start only when CWT started terminal), RESET at live, PC RESET and PCHT completion.

FIG. 2 is a power distribution system diagram in a steady state according to an embodiment of the present invention, FIG. 3 (a) is a power distribution system separated from a fault section during a failure according to an embodiment of the present invention, And FIG. 4 is an explanatory diagram of a power distribution system failure handling method according to an embodiment of the present invention. (Here, the switches are G1 to G17, and the switches are respectively connected to the terminal device)

2 to 4, the load of the first terminal connected to the substations (MTR # 1 to # 4) in each power distribution line can be transmitted to the always-open point. For example, the load capacity of G1 is transmitted to G11, G15 and G7 in the normal communication state, the load capacity of G13 is transmitted to G11, the load capacity of G17 is transmitted to G15, and the load capacity of G9 is transmitted to G7 .

Referring to FIG. 2, for example, it has a connection map as shown in Table 2 below.

division
G1
G2
G3
G4
G5
G6
G7
G8
G9
G10
G11
G12
G13
G14
G15
G16
G17
A wiring line (D / L)
Section
(Section) 1
G10
G1
G2
G3
G4
G5
G1
G7
G8
G1
G1
G11
G12
G4
G1
G15
G16
Section
(Section) 2
G2
G3
G4
G5
G6
G7
G2
G9
G2
G10
G13
G5
G2
G17
Section
(Section) 3
G10
G14
G14
G3
G11
G15
G3
Section
(Section) 4
G4
G4
Section
(Section) 5
G5
G14
B wiring line (D / L)
Section
(Section) 6
G9
G13
G17
Section
(Section) 7
G8
G12
G16
Section
(Interval) 8
Section
(Section) 9
Section
(Interval) 10
Tie (connection) 1
G7
G7
G7
G7
G7
G7
G7
G7
G11
G11
G11
G15
G15
G15
Tie (connection) 2
G11
G15
G15
G15
Tie (connection) 3
G15
Tie (connection) 4

And the terminal device connected to each switch can communicate with the set switch in a coordinated manner so that the fault section can be separated in cooperation with the protective device in the event of a fault.

For example, in the power distribution diagram of FIG. 2, a failure may occur between G3 and G4 as shown in FIGS. 3A and 3B. In the event of a fault, the fault can be separated into the fault section by the protection coordination communication between the fault G3 and the fault G4 as shown in FIG. 3A.

As shown in FIG. 3B, G7 can be selected by selecting G7 as an input normally open point. Thereafter, G7 is in a state other than the normally open point.

Specifically, referring to FIG. 4, in the power system failure processing method of the embodiment, the load of G1 in (1) can be transmitted to G7, G11, and G15, which are always open points. Here, the load amount may be the sum of three phases. However, the present invention is not limited thereto.

And in ②, the load of G9 can be transferred to G7.

In (3), G7 can transmit the available capacity of the substation (MTR # 2) to G1, G2, G3, G4, and G5.

And ④ the load of G13 can be transferred to G11.

In (5), the supplyable capacity of the substation (MTR # 3) can be transferred to G1 and G10 in G11.

And the load of G17 in ⑥ can be transferred to G15.

And in G, the available capacity of the substation (MTR # 4) can be transferred to G1, G2, G3, G4, and G14.

Here, (1) to (7) can occur in real time in a steady-state power distribution system. Also, (1) to (7) can occur at the same time. That is, (1) to (7) can occur regardless of the order.

At this time, G4 receives the supplyable capacities of the interconnection lines (G7 and G9 connected to G8 and G9 and G15 connected to G17 and G17) of the normally open points G7 and G15, G15 is larger than the available supply capacity, and calculates an input normally open point. For example, if G7 is larger than G15, then G7 is calculated as an input normally open point.

In the failure section G4, the used capacity can be calculated by using its own load and voltage / current, and the calculated usable capacity of the G4 can be compared with the available capacity of the charged normally open point G7.

At this time, when the supplyable capacity of the charging normally open point G7 is larger than the used capacity of G4, it is charged to G4.

Specifically, ⑧ is a steady-state power distribution scheme, in which the PT is transmitted from G3 to G4, and the Echo PT is transmitted from G4 to G3. ODT and Echo PT are completed and RESET is performed. Further, after the closing normally open point is calculated in step (9), G4 can input the closing normally open point (G7).

Prior to this fault, G3 is open to trip and G4 can be tripped as well. And, when G7 is put into G4, TSC is transmitted to G7, and G7 can be closed by CDT. That is, G7 can be excluded from the always-open point. Thus, the input normally open point can be excluded from the input normally open point if another fault section occurs.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

10: Actuator
20:
30: WDM-based serializer
40: Wireless bridge for distribution automation (DWB)

Claims (6)

The terminal device receiving the supplyable capacity from the plurality of normally open points;
The terminal device recognizing a fault interval by power supply data communication with each other;
Separating the fault section;
The terminal apparatus adjacent to the failure section compares the available capacity of the plurality of normally open points to select an inserted normally open point; And
And inputting the closing constantly opening point in the fault section.
The method according to claim 1,
Wherein the step of injecting comprises:
And comparing the used capacity of the terminal apparatus adjacent to the failure section with the supplyable capacity of the charged normally open point and inputting the charged normally open point.
3. The method of claim 2,
And when the closing normally open point is inserted into the fault section, the fault is excluded from the normally open point when another fault section occurs.
3. The method of claim 2,
When the supply allowable capacity of the input normally open point is larger than the capacity of the terminal apparatus adjacent to the fault section, the closing normally open point is charged.
The method according to claim 1,
Wherein said closing normally open point is a normally open point having a large supplyable capacity out of said plurality of said open points.
The method according to claim 1,
Wherein said separating comprises:
And disconnecting the fault section by opening the switch connected to the terminal apparatus adjacent to the fault section.

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