一种MMC-MTDC系统新型协调控制策略  

A New Coordinated Control Strategy for MMC-MTDC System and Stability Analysis

作　　者：刘盼盼 荆龙 吴学智 李金科 

机构地区：[1]国家能源主动配电网技术研发中心,北京市海淀区100044 [2]北京电动车辆协同创新中心,北京市海淀区100044

出　　处：《电网技术》2016年第1期64-69,共6页Power System Technology

基　　金：国家能源应用技术研究及工程示范项目(NY20150302)~~

摘　　要：针对模块化多电平变流器多端直流输电系统,提出了一种基于U-I下垂控制的新型协调控制策略。该控制策略将平移下垂曲线和改变下垂曲线斜率相结合,消除静态偏差,避免了直流网络在功率发生较大程度变化时出现过电压。然后,对所提出的新型协调控制策略进行了稳定性分析,采用计算输电系统根轨迹的方法得到了控制器参数的取值范围。最后,在RT-lab实时仿真器中搭建了一个并联型四端直流输电系统,并对所提出的控制策略进行了时域仿真分析,验证了上述控制策略的有效性。For MMC-MTDC transmission system, a new DC voltage coordinated control strategy is proposed. The strategy combines translating droop curve and changing slope of droop curve to eliminate static bias and avoid overvoltage when power changes greatly. Stability analysis is carried out based on the strategy to obtain relationships between controller parameters and stability. Finally, a parallel-type four-terminal MTDC scheme is developed in RT-lab real-time simulator, and time-domain simulation is performed to validate its effectiveness.

关 键 词：模块化多电平变流器 多端直流输电系统 U-I控制 下垂曲线平移 斜率变化 稳定性分析 

分 类 号：TM712[电气工程—电力系统及自动化]