Research On Ferromagnetic Resonance Control Method Of Changji Distribution Network

Aiming at the frequent ferroresonance events in Changji distribution network of Xinjiang,this paper analyzes the existing harmonic elimination devices,and finds out that the existing harmonic elimination devices generally have the problem of small fusing capacity,so that when the scale of distribution network increases,it is not enough to prevent the overvoltage caused by ferroresonance.The ferromagnetic resonance problem of Changji distribution network is treated.In view of this,this paper presents a research method of ferroresonance control in distribution network based on flow-sensitive elements.The main work is as follows:Firstly,the PT abnormal events in Changji power grid are reviewed,and the mechanism and harm of resonance overvoltage under direct grounding condition of voltage transformer are analyzed.Then,aiming at the demand of DC bias control in power grid,several harmonic elimination devices are analyzed and compared,and the shortcomings are pointed out.A new harmonic elimination measure,namely Liumin resistance harmonic elimination device,is proposed.Finally,the simulation analysis and experimental verification of the proposed flow-sensitive primary harmonic elimination device are carried out,and the most effective method to control the resonance overvoltage of voltage transformer is proposed.