Optimization Research and Application of Field Electrical Test of Converter Transformer
The on-site tests of the converter transformer(converter transformer)have the characteristics of short duration and large workload.The on-site personnel usually need to do a lot of preliminary preparation work,and the schemes for related tests have great optimization space.Based on the problem of the difficulty of the on-site open-circuit test of the converter transformer,a 2nd-order high-pass filter is proposed to filter the excitation current to solve the problem of distorted measurement waveform.For the preliminary demagnetization test,an unplugged test connection scheme is introduced.In addition,a brief introduction is given to the special diagnostic tests of the converter transformer,such as the capacitor frequency domain dielectric response test,the valve side capacitor divider accuracy measurement test,and the mechanical characteristic test of the switch.The practical application and simulation analysis show that the on-site open-circuit test optimization scheme proposed for the converter transformer is effective.The introduction and application of the special diagnostic tests of the converter transformer can help the maintenance personnel to detect potential defects in time..
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