Grounding System Circulation Calculation of Ultra-high Voltage Switching Substation
For the phenomena of UHV system high voltage and large capacity, circulating current in the shell and grounding network is relatively large. Under steadystate operation, shell will product a large loss of circulating current. Combined with the 1100 kV HGIS substations, according to the basic principles of electromagnetic transformers ,GIS /HGIS shell equivalent circuit model is created and model parameters are determined. The it-type equivalent is used to show grounding element and the use of numerical methods for the electrical grounding system parameters. Analysis showed that circulating current of the main mesh is controlled to less than 20A and circulating current of the sub-mesh is controlled to less than 700A by using double level grounding network. However, the short-wire current is large. Further analysis, there is effect that application of deep vertical grounding electrode and short-wire reduce the circulating current of grounding network, and the best design have been given. Finally, the circulating current value and temperature rise of each part will be given.
Lin Xin Wang Fei-ming Xu Jian-yuan
Shenyang University of Technology Liaoning Province Key Laboratory of Safe Operation & Monitoring of Power Grid,Shenyang 110870, Liaoning Province, China
国际会议
西安
英文
31-34
2011-10-23（万方平台首次上网日期，不代表论文的发表时间）