| 摘要 |
PURPOSE: A partial discharge diagnosis system of the electric power equipment is provided to measure the frequency phase of the voltage applied to the electric power equipment accurately without using a voltage transformer(PT) signal and a commercial frequency electric source signal but using a contactless phase measurement sensor. CONSTITUTION: A partial discharge diagnosis system(100) comprises a built-in type partial discharge detection sensor(110), an external type partial discharge detection sensor(120), a contactless phase measurement sensor(130) and a partial discharge signal processing apparatus(140). The built-in type partial discharge detection sensor is attached inside the electric power equipment(10), detects the partial discharge generated in the electric power equipment, and outputs the detection signal. The external type partial discharge detection sensor is attached to an outside of the electric power equipment, detects the partial discharge generated in the electric power equipment, and outputs the detection signal. The contactless phase measurement sensor measures the frequency phase of the high voltage applied to the electric power equipment. The partial discharge signal processing apparatus determines a generation existence of the partial discharge in the electric power equipment and a generating cause by using the partial discharge signal detected from the external type partial discharge detection sensor and a frequency phase of the applied voltage of the electric power equipment measured in the contactless phase measurement sensor.
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