35KV power distribution station internal and external over voltage monitoring method based on voltage mutual inductor sample
A voltage transformer, 35KV technology, applied in the field of overvoltage online monitoring, can solve the problems of general performance, affecting the safety of measuring equipment and personnel, and high cost, and achieve the effect of saving equipment investment
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[0021] see figure 2 As shown, the present invention is based on a 35KV distribution station internal and external overvoltage monitoring method based on voltage transformer sampling. The voltage transformer is connected to the incoming busbar of each phase of the distribution station or the busbar of the switch cabinet, and the voltage transformer is used to collect each phase. Voltage signal. In the low-frequency state, such as power frequency, the steady-state amplitude-frequency response and transient amplitude-frequency response of the voltage transformer are linear, and it has a good overvoltage signal transmission capability. The coil of the transformer will generate electrostatic induction between the coils under the action of impulse voltage such as operating impulse voltage and lightning impulse voltage. At this time, the voltage transmission is mainly electrostatic induction. Therefore, in the high frequency range, the voltage transformer can be regarded as a capacitor ...
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