Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof
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The invention relates to a method for testing the electricity of an ultrahigh-voltage transmission line based on electric field measurement, which comprises the following steps: 1, establishing a measurement point; 2, measuring an electric field; 3, establishing a transmission line power frequency inverse problem equivalent model; and 4, computing the voltage of the transmission line according to the electric field at the measurement point to obtain the actual voltage of each phase of transmission line, if the voltage of the transmission line is below 30 V, determining the transmission line is electrically neutral, otherwise, determining the transmission line is electrified. The invention also relates to a system for implementing the method for testing the electricity of the ultrahigh-voltage transmission line based on the electric field measurement, which consists of an electricity testing terminal and a data processing centre. The method and the system realize the non-contact electricity testing of the ultrahigh-voltage transmission line and ensure the safety of workers. Because the voltage level of the ultrahigh-voltage transmission line is high and a safe distance is long, the safe, effective and new method for testing the electricity of the ultrahigh-voltage transmission line is provided.