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Live Line Measuring the Parameters of 220 kV Transmission Lines with Mutual Inductance in Hainan Power Grid
Hainan Power Technology Research Institute, Hainan Power Grid Corporation, Haikou, China
School of Electrical Engineering, Wuhan University, Wuhan, China
School of Electrical Engineering, Wuhan University, Wuhan, China
- 1 Hainan Power Technology Research Institute, Hainan Power Grid Corporation, Haikou, China
- 2 School of Electrical Engineering, Wuhan University, Wuhan, China
- 3 School of Electrical Engineering, Wuhan University, Wuhan, China
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Abstract
A live line measurement method for the zero sequence parameters of transmission lines with mutual inductance is introduced. The mathematical models of the measurement method are given. Global Positioning System (GPS) is used as the synchronous signal for the measurement carried out at different substations simultaneously. The measurement system and digital simulation results are given. Finally, the live line measurement results of two 220 kV transmission lines with mutual inductance in Hainangrid are given. Results from both simulation and on-site measurement show that the live line measurement method is feasible, and its measurement accuracy can satisfactorily meet the requirements of engineering measurement.
KeywordsTransmission linesZero sequence parameterMutual inductanceLive line measurementGPS
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