PT励磁特性对铁磁谐振的影响及检测研究  

Influence of Excitation Characteristics of PT on Ferroresonance and Detection Research

作　　者：兰华[1] 王彬[1] 杨亮[1] 袁天刚[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《电测与仪表》2010年第10期10-14,共5页Electrical Measurement & Instrumentation

摘　　要：在中性点不接地的电力系统中,系统母线装置的电磁式电压互感器(PT),在一定激发条件下极易引起铁磁谐振过电压。电力系统中铁磁谐振过电压受很多因数的影响。一些文献对铁磁谐振电路中的消耗、电压幅值、电容值的大小及合闸初相角对谐振过程的影响研究较多,本文将对非线性电感的励磁特性对铁磁谐振的影响进行深入分析。并利用粒子群优化算法求解非线性铁磁谐振电路方程,从而检测出系统发生铁磁谐振的类型。通过计算与仿真分析得出一些有实际意义的结论,为相关电力部门采取相应地措施消除谐振提供理论依据。In the neutral point ungrounded power system,system bus in the installation of the electromagnetic potential transformer（PT）,the ferroresonance overvoltage is easy to occur under certain excitation conditions.The ferroresonance in power system is impacted by many factors.Some literature is more consumption of ferromagnetic resonance circuit,the voltage amplitude,capacitance size and early closing phase of the process of ferroresonance.This paper is the further analysis of influence of non-linear excitation characteristics of the inductor on ferroresonance.It uses particle swarm optimization algorithm for solving nonlinear ferromagnetic resonance circuit equation.Further detect the type of phylogenetic ferroresonance.Through calculation and simulation analysis,it draws some meaningful conclusions,takes corresponding measures to eliminate resonance provides a theoretical basis for the power sector.

关 键 词：电压互感器 铁磁谐振 励磁特性 铁磁元件 MATLAB/SIMULINK仿真 

分 类 号：TM864[电气工程—高电压与绝缘技术]