고장전류 변화율에 따른 직류 급전계통 고장점 표정오차 분석

초록

This paper analysis the effect of fault current breaking time and fault current variation ratio for fault locator in the DC feeding system. For this, we present the fault location estimation technique including fault current variation ratio using Kirchhoff/s voltage law for the effect of the early period's fault current variation ratio. And then, we compare the error of fault location estimation using fault simulation. In conclusion, the conventional technique including simple technique not considering fault current variation ratio output large fault location estimation error using fault data after 20ms. However the proposed technique considering fault current variation ratio estimate fault location accurately using fault data after 20ms.