METHOD FOR DIAGNOSING CONDITION OF POWER CAPACITOR AND SERIAL REACTOR

摘要

The present invention relates to a method for diagnosing condition of a power capacitor and a serial reactor. The method comprises: a first step of collecting information on voltage and current of the power capacitor and the serial reactor; a second step of calculating reference voltage (V_n) and variable voltage (V_1) using the information on the voltage and the current and calculating inductance (L_n) at the reference voltage (V_n) and variable inductance (L_1) at the variable voltage (V_1); a third step of calculating a change in the inductance (ΔL_1) using the inductance (L_n) and the variable inductance (L_1); and a fourth step of calculating an inductance change ratio when the variable voltage (V_1) occurs using the inductance (L_n) and the variable inductance (L_1). According to the present invention, a user is capable of calculating the inductance change ratio based on the reference voltage which is constant irrespective of voltage fluctuation because the user is capable of knowing the inductance change ratio irrespective of the voltage fluctuation when a layer short circuit occurs in the serial reactor.;COPYRIGHT KIPO 2016