Traction substation power supply arm harmonic current detection method
A technology for traction substations and harmonic currents, applied in the direction of measuring current/voltage, measuring devices, measuring electrical variables, etc., to overcome dynamic response speed and steady-state detection accuracy, high steady-state detection accuracy, and improve steady-state detection. The effect of precision
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[0048] A specific embodiment of the present invention is: a harmonic current detection method for a power supply arm of a traction substation, the steps of which are as follows:
[0049] A. Signal sampling
[0050] Sampling the load current on the uplink and downlink power supply arms of the traction substation respectively obtains the discrete value i of the load current of the uplink and downlink power supply arms at the current time n α (n), i β (n); Obtain the reference voltage discrete value u of the upper and lower power supply arms at the current moment n in the same phase as the actual voltage of the upper and lower power supply arms of the traction substation through phase-locked loop processing α (n), u β (n); where the subscripts α and β are the labels of the upper and lower power supply arms respectively;
[0051] B. Calculate the equivalent conductance
[0052] According to the discrete value i of the load current of the uplink and downlink power supply arms at ...
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