Intelligent substation fault diagnosis method combining topology and relay protection logic

A technology for intelligent substation and fault diagnosis, applied in the direction of reasoning method, information technology support system, etc., can solve problems such as not forming a system theory

Inactive Publication Date: 2013-04-03
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the existing fault diagnosis models for power transmission and transformation equipment in substations only involve the location of faulty ...

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  • Intelligent substation fault diagnosis method combining topology and relay protection logic
  • Intelligent substation fault diagnosis method combining topology and relay protection logic
  • Intelligent substation fault diagnosis method combining topology and relay protection logic

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] Taking the main wiring of the substation shown in Figure 1(a) as an example, which includes typical 3 / 2 circuit breaker wiring, the idea of ​​using the "group" structure to solve the loop is as follows:

[0043]Step 1: Map the primary equipment, secondary equipment, and network equipment into nodes to form an undirected graph reflecting the physical topology connection of the smart substation, as shown in Figure 1(b);

[0044] Step 2: Carry out ring-solving operations on all complex ring structures in the undirected graph. The method is to find all cliques with 3 nodes, and replace them with a clique node equivalently, and form an undirected graph after replacement;

[0045] Find all cliques with 3 nodes, and replace them with a clique node equivalently. The undirected graph after replacement is shown in Figure 1(c);

[0046] Step 3: Perform a ...

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Abstract

The invention discloses an intelligent substation fault diagnosis method combining topology and relay protection logic. The intelligent substation fault diagnosis method combining the topology and the relay protection logic comprises the following steps of: analyzing network topology modeling processes of a primary system and a secondary system of an intelligent substation; equivalently replacing all groups with a node quantity of 3 by a group node; simplifying an undirected graph; providing a logical inference method in fit with a Petri net principle according to an extension coefficient, a transition function and a transition function; searching logical relation of the primary system and the secondary system by using the entire intelligent substation system as a whole body; and carrying out a fault diagnosis reasoning process through the logical relation of the primary system and the secondary system. The intelligent substation fault diagnosis method is applied to the fault diagnosis reasoning of an intelligent substation, has the advantages of simple, efficient and rapid network topology constructing and searching process, practical fault diagnosis process and accurate result, and can be used for laying a good foundation for operations, such as fault diagnosis and the like, of the intelligent substation.

Description

technical field [0001] The invention relates to a substation fault diagnosis and judgment method, in particular to an intelligent substation fault diagnosis method combining topology and relay protection logic. Background technique [0002] As an important hub of power transmission and distribution in the power system, the substation's fault diagnosis and accident handling are of great significance to improve the safety and reliability of the power system and prevent malignant power outages. [0003] After the substation is intelligentized, its secondary system structure and form have undergone revolutionary changes compared with conventional substations. The secondary circuit in conventional substations uses hard wiring. This physical wiring is related to the functional configuration of the substation and the input of information or signals between functions. There is a one-to-one mapping relationship between the output, so the secondary wiring with physical entities is the...

Claims

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Application Information

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IPC IPC(8): G06N5/04
CPCY04S10/50
Inventor 高湛军陈青聂德桢王磊
Owner SHANDONG UNIV
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