基于波形自相关的磁控式并联电抗器合闸防误动方案  

Waveform Auto-correlation Based Anti-maloperation Scheme During Energization of Magnetically Controlled Shunt Reactor

作　　者：郑涛[1] 刘校销 ZHENG Tao;LIU Xiaoxiao(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学)

出　　处：《电力系统自动化》2019年第24期156-164,共9页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目（51677069）;国家重点研发计划智能电网技术与装备重点专项资助项目（2016YFB0900600）~~

摘　　要：磁控式并联电抗器(MCSR)容量大范围平滑可调,是解决超/特高压电力系统无功、电压控制难题的有效措施,MCSR的安全稳定运行关系到系统的无功平衡和电压稳定。针对MCSR预励磁合闸导致基于总控电流基频分量的匝间故障保护误动的问题,提出了基于分相控制绕组电流波形自相关分析的合闸防误动方案。首先分析了MCSR在正常运行、预励磁合闸、匝间故障等工况下分相控制绕组电流的波形特征,利用计及了幅值差异的分相控制绕组电流及其延迟半周期的改进波形自相关系数,构成了合闸防误动方案,基于MATLAB/Simulink的仿真实验验证了方案的有效性。The magnetically controlled shunt reactor(MCSR) has a smooth and adjustable capacity in a wide range, which is an effective measure to solve the problem of reactive power and voltage control in extra-high voltage/ultra-high voltage power systems. The safe and stable operation of the MCSR is of vital importance to the reactive power balance and voltage stability of the system. To solve the problem that the maloperation of the protection by using fundamental component of total control current will be caused by the energization with pre-excitation, an anti-maloperation scheme based on the waveform auto-correlation analysis of the three-phase control currents is proposed. Firstly, the waveform characteristics of the three-phase control currents of MCSR under steady-state, pre-excited energization and turn-to-turn fault conditions are analyzed. The improved auto-correlation coefficients of three-phase control currents and the corresponding delayed waveform of half-cycle considering the difference in amplitude are applied to construct the anti-maloperation scheme. Simulation experiments based on MATLAB/Simulink verify the effectiveness of the scheme.

关 键 词：磁控式并联电抗器 预励磁合闸 匝间故障 相关函数 防误动 保护方案 

分 类 号：TM4[电气工程—电器]