配电网铁磁谐振过电压组合消谐策略研究  

Research on Resonance Elimination Strategy of Ferroresonance Overvoltage Combination in Distribution Network

作　　者：陈慧 陈波 刘宁[1] 郭成 CHEN Hui;CHEN Bo;LIU Ning;GUO Cheng(QuJing Bureau of CSG EHV Power Transmission Company,QuJing 655000,China;.Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]中国南方电网公司超高压输电公司曲靖局,云南曲靖655000 [2]昆明理工大学电力工程学院,云南昆明650500

出　　处：《湖北电力》2023年第4期76-83,共8页Hubei Electric Power

基　　金：云南省联合基金重点项目(项目编号:202201BE07000)。

摘　　要：中性点非有效接地系统中,由于电磁式电压互感器(TV)的非线性特性,在一定的激发条件下易发生铁磁谐振,威胁电气设备的绝缘,进而影响配电网的安全稳定运行。而传统消谐方式,如一次消谐易受到消谐器自身容量限制,常发生烧毁事故,二次消谐消谐效果难以保证;针对上述问题,结合一次消谐和二次消谐方式各自的的优点,提出一次消谐和二次消谐相结合的组合消谐方式;当谐振检测模块检测到谐振发生后,立即投入二次消谐装置进行谐振的抑制;若预设时间后系统恢复正常状态,则消谐过程结束,如果谐振没有消除,则退出二次消谐装置,投入一次消谐消耗谐振能量,从而完全消除谐振。最后,通过仿真分析,验证了所提方法的可行性。Due to the nonlinear characteristics of electromagnetic voltage transformer(TV),ferromagnetic resonance is easy to occur under certain excitation conditions,which threatens the insulation of electrical equipment and further affects the safe and stable operation of distribution network.However,the traditional resonance elimination method,such as the primary resonance elimination is easy to be limited by the capacity of the detuning device,often occurs burning accidents,and the effect of thesecondary resonance elimination is difficult to guarantee;In view of the above problems,this paper combines the advantages of the primary and secondary resonance elimination methods,and puts forward the combination of the primary and secondary resonance elimination methods.When the resonance detection module detects the resonance,it immediately puts in the secondary resonance elimination device to suppress the resonance.If the system returns to the normal state after the preset time,the detuning process ends,if the resonance is not eliminated,the secondary resonance elimination device is withdrawn,and the resonant energy is consumed by the primary resonance elimination to completely eliminatethe resonance.Finally,the feasibility of the proposed method is verified by simulation analysis.

关 键 词：铁磁谐振 电压互感器 消谐策略 组合消谐 中性点接地 谐振检测 

分 类 号：TM726[电气工程—电力系统及自动化]