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A method for calculating a space electromagnetic field of a gas-insulated substation

A technology of gas insulation and calculation method, applied in calculation, computer-aided design, electrical digital data processing, etc., can solve the problems of large data storage, high complexity, complicated operation, etc., and achieve the effect of low algorithm complexity

Active Publication Date: 2019-08-16
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology

[0004] The measurement of space electromagnetic field in gas-insulated substation requires expensive equipment and complicated operation
Relatively speaking, the method of using simulation software to simulate the space electromagnetic field can predict and evaluate the space electromagnetic environment of the substation more conveniently. At present, there are few simulation calculations involving the space electromagnetic field generated by the substation at home and abroad, and the existing simulations all use the time-domain finite difference method. , the finite difference time domain method has high computational complexity and large data storage capacity for large and complex objects

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[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] Such as figure 1 As shown, the method of this embodiment is as follows.

[0025] The invention provides a method for calculating the space electromagnetic field of a gas-insulated substation, comprising the following steps:

[0026] Step 1: Obtain the equivalent models of circuit breakers, disconnectors, grounding switches, and transformers in the substation, select a line based on the theory of multi-conductor transmission lines, and use EMTP electromagnetic transient simulation software to establish gas insulation under the operation of disconnectors Substation circuit model, calculating the fast transient overvoltage and fast transient overcurrent at the discon...

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Abstract

The invention provides a method for calculating a space electromagnetic field of a gas-insulated substation, and relates to the technical field of electromagnetic compatibility of secondary equipmentof substations. The method comprises the following steps: step 1, obtaining an equivalent model of a transformer substation; establishing a gas-insulated substation circuit model to obtain fast transient overvoltage and current; step 2, establishing a three-dimensional space model of the gas-insulated substation according to the actual size of the substation and a time domain finite integration method, and inputting the fast transient overvoltage and the fast transient overcurrent into the model to obtain a substation space electromagnetic field; and step 3, selecting spatial positions to be measured in the transformer substation, placing electric field probes and magnetic field probes on the spatial positions, and extracting an electric field and magnetic field intensity and a distribution cloud picture of the electric field and the magnetic field intensity in the spatial positions from the three-dimensional space model of the gas-insulated transformer substation. The method is low incomplexity, and does not become complex along with complexity of the appearance structure, the geometric dimension and the material parameters of the target object.

Description

technical field [0001] The invention relates to the technical field of electromagnetic compatibility of substation secondary equipment, in particular to a calculation method for space electromagnetic field of a gas-insulated substation. Background technique [0002] With the rapid development of power systems, gas-insulated substations have been widely used due to their compact structure, small footprint, and easy maintenance. [0003] The operation of the isolating switch in the gas-insulated substation will produce a fast transient overvoltage with a high amplitude, a large steepness, and a fast frequency and a corresponding fast transient overcurrent, which will generate a strong space in the substation Electromagnetic field, and will produce strong electromagnetic interference to the secondary equipment in the substation. Therefore, it is of great significance to study the distribution of space electromagnetic field in gas-insulated substation during the operation of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 林莘赵雪郝莎翟文鹏董沅慧李雁
Owner SHENYANG POLYTECHNIC UNIV
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