逆变侧控制策略对换相失败的影响及恢复特性优化研究  

Influence of Inverter Control Strategy on Commutation Failure and Recovery Characteristic Optimization

作　　者：李亚男[1] 卢亚军[1] 刘心旸[1] 邹欣[1] 

机构地区：[1]国网北京经济技术研究院,北京市102209

出　　处：《电力建设》2015年第9期112-116,共5页Electric Power Construction

基　　金：国家电网公司科技项目(SGCC[2012]515)

摘　　要：针对直流系统逆变侧不同控制策略下的换相失败恢复特性开展研究,首先从原理上分析了定关断角控制与定电压控制方式下换相失败控制器的工作原理;然后基于实时数字仿真平台以及实际工程的录波数据,全面研究比较了这2种控制策略对换相失败恢复特性的影响,结果表明换相失败与直流运行功率、稳态运行时的关断角以及故障发生时刻均有关系,而与采用何种控制方式相关性不强;最后提出对低压限流功能模块(voltage dependent current order limiter,VDCOL)电流指令参数进行优化的措施,以改善换相失败恢复特性并对其效果进行了仿真验证。The recovery characteristics of DC system after commutation failure with different inverter control strategies were studied. Firstly, the operation principle of controller with commutation failure under constant extinguish angle and constant voltage control mode was analyzed. Then based on real-time digital simulation （ RTDS ） and the record data of actual project, the influences of these two control modes on the recovery characteristics of commutation failure were comprehensively compared. The results indicate that commutation failure is bound up with DC operation power, extinguish angle in steady state and failure moment, but has no relationship with inverter control mode. Finally, a novel optimization method of recovery characteristic was proposed, based on modifying current instruction parameter in VDCOL （ voltage dependent current order lirniter） module, and the simulation was carded out to verify its effect.

关 键 词：直流系统 换相失败 恢复特性 实时数字仿真 定关断角控制 定电压控制 

分 类 号：TM721[电气工程—电力系统及自动化]