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Voltage loss detection method of transformer substation bus and related device

A technology of busbar voltage loss and detection method, applied in the direction of fault location, detection of faults according to conductor type, etc., can solve the problems of increasing the time cost of busbar restoration in substations, reducing power supply reliability, etc., to facilitate rapid restoration of power and reduce the amount of operation. , Improve the effect of the scope of application

Active Publication Date: 2021-11-26
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the previous technology, the dispatcher or substation operator judged that the busbar was out of voltage after analyzing multiple electrical quantities and background signals, and manually disconnected all feeder switches connected to the faulty busbar, which increased the time cost of busbar restoration in the substation , which reduces the reliability of power supply; at the same time, the self-healing of the distribution network cannot be maximized. Whether it is the local self-healing of the distribution network or the self-healing of the main station, it is powerless in terms of bus failure and voltage loss.

Method used

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  • Voltage loss detection method of transformer substation bus and related device
  • Voltage loss detection method of transformer substation bus and related device
  • Voltage loss detection method of transformer substation bus and related device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] figure 1 It is a flow chart of a voltage loss detection method for a substation bus provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation where voltage loss detection is performed according to the topology of the bus. This method can be implemented by a voltage loss detection device for a substation bus. Execution, the voltage loss detection device of the substation bus can be implemented by software and / or hardware, and can be configured in computer equipment, such as computers, servers, workstations, etc., specifically including the following steps:

[0076] Step 101. Obtain the voltage value of the bus bar and the current value of the lowering switch.

[0077] In this example, if Figure 2A and Figure 2B As shown, the busbar 211 is connected to the transformer 200 of the substation through a lowering switch 242, and the busbars 211 are connected through a bus tie switch, and the busbar 211 is also called a lowering busba...

Embodiment 2

[0097] image 3 It is a flow chart of a voltage loss detection method for a substation bus provided by Embodiment 2 of the present invention. This embodiment is based on the foregoing embodiments, and further increases The operation of performing pressure loss detection, the method specifically includes the following steps:

[0098] Step 301. Acquire the voltage value of the bus bar and the current value of the lowering switch.

[0099] Among them, the busbar is connected to the transformer of the substation through a low-voltage switch, and the busbars are connected through a bus tie switch.

[0100] Step 302, if the voltage value of the bus bar is zero and the current value of the lowering switch is zero, then determine the type of the substation based on the transformer.

[0101] Step 303, when the type of the substation is a multi-main substation, identify the state of the bus tie switch.

[0102] Step 304, if the state of the bus tie switch is half position, it is dete...

Embodiment 3

[0128] Figure 4 The structural block diagram of a voltage loss detection device for a substation bus provided in Embodiment 3 of the present invention may specifically include the following modules:

[0129] The electrical quantity acquisition module 401 is used to acquire the voltage value of the busbar and the current value of the lowering switch, the busbar is connected to the transformer of the substation through the lowering switch, and the busbars are connected through a bus tie switch;

[0130] A substation type determining module 402, configured to determine the type of the substation based on the transformer if the voltage value of the bus bar is zero and the current value of the lowering switch is zero;

[0131] The first state identification module 403 is used to identify the state of the bus tie switch when the type of the substation is a multi-main substation;

[0132] The first voltage loss condition determining module 404 is configured to determine that the bu...

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Abstract

The embodiment of the invention provides a voltage loss detection method of a transformer substation bus and a related device. The method comprises the following steps of acquiring a voltage value of the bus and a current value of a low-change switch; if the voltage value of the bus is zero and the current value of the low-change switch is zero, determining the type of a transformer substation based on a transformer; when the type of the transformer substation is a multi-main-transformer transformer substation, identifying the state of a bus tie switch; if the state of the bus tie switch is an open position, determining that the bus loses voltage; when the type of the transformer substation is a single-main-transformer transformer substation, identifying the state of the low-change switch; and if the state of the low-change switch is an open position, determining that the bus loses voltage, and taking the state of a topology as a basis for judging whether the bus loses voltage or not, thereby quickly isolating the voltage-loss bus, reducing the operation amount of a dispatcher and the power transformation personnel, facilitating the quick power restoration, and meanwhile, improving the application range of the self-healing of a distribution network.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power grid detection, and in particular to a voltage loss detection method and a related device for a substation bus. Background technique [0002] The bus on the substation bus is an important component in the power system and an important device for collecting and distributing electric energy. There are usually many electrical components connected to the bus, and the loss of voltage on the bus will cause a power outage for these components, resulting in a large-scale power outage. Therefore, bus voltage loss is one of the most serious failures of substation electrical equipment. [0003] In the previous technology, the dispatcher or substation operator judged that the busbar was out of voltage after analyzing multiple electrical quantities and background signals, and manually disconnected all feeder switches connected to the faulty busbar, which increased the time cost of busbar r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086
Inventor 魏旭佳陈晓彬孙玉彤罗苑萍王锃黄鸿杰
Owner GUANGDONG POWER GRID CO LTD