Harmonic-component-based anti-interference capacitance measurement method for untransposed transmission line
A technology of transmission lines and measurement methods, which is applied in the directions of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., and can solve problems such as line power frequency parameter measurement errors, failure to meet measurement requirements, and interference currents that cannot be measured
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[0037] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.
[0038] 1. Non-transposed transmission line capacitance anti-interference measurement based on harmonic components, the embodiment includes the following steps:
[0039] Step 1. Select the measured power failure line a and the nearby live line b.
[0040] See figure 1 As shown, through the step-up transformer (the transformer can saturate under no load), a three-phase power frequency voltage is applied to the head end of the line a to be measured, and the end of the line a is open (the end current is 0). Use the time service function of GPS to obtain a time reference with an error of less than 1 microsecond. Under GPS time synchronization, the embodiment simultaneously collects the three-phase voltage at the head end of line a Three-phase voltage at the end And the three-phase current at the head end And save the measurement data as a file.
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