A Research On The Implement Of Automatic Tuning For Petersen Coil In 35kV Distribution Network

The thesis analyses some kinds of representative grounding devices with automatic resonance Petersen coil and points out their characteristics and applicability separately. Considering the actual condition and development of the 35kV distribution network in ChangZhi district ?a new type of automatic resonance devices with on-line tap-changer is developed for the capacitive current compensation and faulted line selection in case of an earth fault. The paper explains the method of the Petersen coil parameter selection and expatiates the working principle of micro-computer controller. New methods of on-line measuring of the capacitive current and the control of the series resistance are put forward?which lead to the integration of the automatic resonance and the faulted line selection in a compensating network. The result from field test shows that the effect of compensation and the faulted line selection is very good.Zhang Xuehong(Electrical Engineering)Directed by Prof. Xu Yuqin,Senior Engineer Cheng Yinqing...