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

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...

AI Technical Summary

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

Images