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Multi-target optimized rectification method of relay protection

A multi-objective optimization and relay protection technology, applied in data processing applications, prediction, calculation, etc.

Active Publication Date: 2015-09-23
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Description
  • Claims
  • Application Information

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  • Multi-target optimized rectification method of relay protection
  • Multi-target optimized rectification method of relay protection
  • Multi-target optimized rectification method of relay protection

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Embodiment Construction

[0063] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0064] Such as figure 1 As shown, a multi-objective setting method suitable for relay protection includes the following steps:

[0065] Step (1): Establish the objective function of multi-objective optimal setting of relay protection;

[0066] According to the performance requirements of relay protection, select the optimization index of relay protection, establish the multi-objective optimization model of relay protection setting, and obtain the multi-objective optimization setting model of relay protection

[0067] Step (2): Select the setting variables in the relay protection multi-objective optimal setting model: time setting coefficient TDS and starting current I P ;

[0068] Among them, the operating characteristic equation of the conventional inverse time overcurrent protection of the protection device is as follows

[0069] t ...

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Abstract

The invention discloses a multi-target optimized rectification method of relay protection. The rectification method comprises the steps that (1) a target function of multi-target optimized rectification of relay protection is established, and according to performance requirements of relay protection, optimized indexes of relay protection are selected, and a multi-target optimization model of relay protection rectification is established; (2) rectification variables of multi-target optimization of relay protection are selected; (3) constrained conditions of the rectification variables in the multi-target optimization model of relay protection rectification are set; (4) the target function of multi-target optimized rectification of relay protection is solved by a chaos genetic algorithm to obtain a set of Pareto optimal solutions of the target function; and (5) one optimal solution which can satisfy an expected target of relay protection is selected from the set of Pareto optimal solutions in a fuzzy membership degree method. The method can realize integrated optimization of reliability, selective and quick action performance of relay protection.

Description

technical field [0001] The invention relates to the field of relay protection, in particular to a multi-objective optimal setting method for relay protection. Background technique [0002] Relay protection is one of the most important secondary equipment in the power system, which plays a vital role in the safe and stable operation of the power system. Whether the relay protection device can meet the "four characteristics" proposed by the power grid, that is, the requirements of reliability, selectivity, quick action and sensitivity, largely depends on whether the relay protection setting is reasonable. The evaluation of the relay protection setting scheme is based on the overall protection effect of all protections in the whole network rather than the effect of a certain protection. The operation mode of modern distributed power system is extremely complicated, and there are multiple circuits. Incorrect action of relay protection will not only expand the failure of the pow...

Claims

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Application Information

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IPC IPC(8): G06Q10/04
Inventor 王瑞琪刘洪正孙树敏靳占新李笋王昭鑫于芃张用赵鹏李广磊毛庆波程艳吕雯
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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