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A method and system for differential protection of components in a substation

A technology for substations and components, applied to electrical components, emergency protection circuit devices, etc., can solve problems such as large amount of calculation, achieve the effect of small amount of calculation, speed up operation, and reduce complexity

Active Publication Date: 2021-08-10
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the method of using multiple agents to realize the backup protection of components in the substation still adopts the centralized protection mode, and the differential backup of the whole station is carried out based on the topology structure. The information is centralized and the amount of calculation is large. serious consequences

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  • A method and system for differential protection of components in a substation
  • A method and system for differential protection of components in a substation
  • A method and system for differential protection of components in a substation

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0037] Such as figure 1 As shown, the substation component differential protection method provided by the present invention includes the following steps:

[0038] 1) According to the distribution of components in each substation and protection measures, build the Agent system of the substation, including the Agent corresponding to the components in each substation. The Agent system is a distributed parallel architecture, specifically:

[0039] Such as figure 2 As shown, the Agents corresponding to the components in each substation are established respectively, and the Agents communicate with each other through the process bus of the substation to form an Agent system...

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Abstract

The invention relates to a method and system for differential protection of components in a substation, which is characterized in that it includes the following steps: 1) Establishing Agents corresponding to components in each substation to form an Agent system; 2) Each Agent establishes a corresponding main protection area and Backup protection area; 3) Each Agent collects the current signal on the line connected to the components in the corresponding main protection area and backup protection area; 4) Each Agent uses differential algorithm A to determine whether the corresponding backup protection area is faulty ; 5) Each Agent uses the differential algorithm A to judge whether the corresponding main protection area fails; 6) If the backup protection area fails and the main protection area does not fail, the Agent sends a trip decision signal to the main protection area. 7) The agent uses differential algorithm B to judge whether the connected line is disconnected, and completes the differential protection of the components in the substation. The present invention can be widely used in the technical field of power grid protection.

Description

technical field [0001] The invention relates to a method and system for differential protection of substation components, and belongs to the technical field of power grid protection. Background technique [0002] Substation is a key connection point in the power system, which plays a vital role in the safety of power grid operation and the reliability of power supply. Substations are equipped with corresponding protections for different components. Generally, differential protection is used as the main protection for transformers and busbars. The complex voltage overcurrent element on the high voltage side of the transformer acts as a near-backup protection for internal faults in the transformer, and the overcurrent element on the medium and low voltage side acts as a near backup or protection for the busbar. Far backup protection. With the increasingly complex grid structure, changes in power flow and fault characteristics also have a certain impact on component protection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/262
Inventor 王紫琪刘颖肖智宏
Owner STATE GRID CORP OF CHINA