Method and system for establishing broadband model of damping bus for gas insulated switchgear equipment

A gas-insulated switch and damping technology, which is applied in the field of power transmission and transformation, can solve the problems that standard models and modeling cannot be used
CN106934115AInactive Publication Date: 2017-07-07CHINA ELECTRIC POWER RES INST +6
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA ELECTRIC POWER RES INST
Publication Date
2017-07-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method and a system for establishing a broadband model of a damping bus for gas insulated switchgear (GIS) equipment are provided. The method comprises: measuring a frequency variation parameter of the damping bus for the equipment; plotting an admittance characteristic curve based on the frequency variation parameter of the damping bus for the equipment; based on the parameter of each local peak point of the admittance characteristic curve, obtaining a parameter value of each component of the RLCG (resistor, inductor, capacitance, and conductance) branch, and carrying out superposition on the RLCG branch by using the image method so as to obtain an equivalent circuit model; using the multi-iteration calculation of the crossover and mutation of the genetic algorithm to determine the optimal value of each component of the RLCG branch in the equivalent circuit model, and obtaining an optimal circuit model; and carrying out frequency sweep and simulation on the optimal circuit model, and comparing the frequency sweep result with the actual measurement result to verify the accuracy of the optimal circuit model, and to determine the broadband model of the damping bus for the GIS equipment.
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Description

technical field

[0001] The invention relates to the technical field of power transmission and transformation, and more specifically, relates to a method and a system for establishing a broadband model of a damping busbar for a gas insulated switchgear. Background technique

[0002] In gas insulated switchgear (GIS) equipment, the operation of the isolating switch generates a very fast transient overvoltage (VFTO), which has an important impact on the safe operation of GIS equipment, external connection equipment and secondary equipment , and with the increase of the voltage level, this effect becomes more and more significant, especially in the UHV system.

[0003] At present, the methods of suppressing VFTO mainly include installing parallel resistors in the isolation switch, adopting a slow-moving isolation switch, adding a magnetic ring, and adding a damping busbar. In the method of adding a damping busbar to suppress VFTO, there is a problem that the standard model cann...

Claims

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