城市多端柔性直流控制保护系统以及仿真研究  

Control and Protection System for Urban Multi-terminal VSC-HVDC and Its Simulation Research

作　　者：胡兆庆[1] 董云龙[1] 李钢[1] 田杰[1] 李海英[1] 杨明[2] 

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102 [2]中南电力设计院,湖北武汉430071

出　　处：《供用电》2016年第8期57-63,44,共8页Distribution & Utilization

基　　金：国家电网公司科技项目(±500kV柔性直流电网多换流站协调控制技术研究)~~

摘　　要：对城市电网应用的多端柔性直流输电控制及保护系统的分层设计、控制功能配置进行了论述,该控制保护系统采用3层控制结构,考虑了多端柔性直流运行多个站之间协调控制能力,即多端柔性直流系统当前直流电压控制站故障退出后,设计了一种适用于柔直电网基于站间通信主从控制策略和直流电压偏差检测的自适应接管策略,这2种策略分别应用于站间通信正常和异常情况下。用实际的控制保护设备和阀控设备、实时仿真设备构成混合实时仿真系统,开发阀控设备和仿真系统的协议并在混合仿真系统中应用,利用该实时仿真系统对一个五端柔性直流输电系统以上提出的主从控制策略进行验证,证明了所提出的控制保护系统框架可行,并且核心的控制策略对系统可靠运行是有效的。The hierarchical design and control function configuration of urban multi-terminal VSC HVDC transmission control and its protection system is discussed. The control and protection system adopt the three-level control configuration,which considers coordinated control among all the converter stations. A kind of coordinated DC voltage control strategy based on master/slave method and DC voltage error detection method are presented,which is used in case of normal and abnormal communication among the stations respectively. The hybrid real-time simulation system is constructed with control and protection devices used in the project,communication protocol between valve base control system and simulation system is developed and used in the hybrid real-time simulation system. The proposed coordinated control strategy is verified in the urban 5-terminal VSC HVDC using the above simulation system,and the simulation results prove that the proposed control and protection configuration is feasible and the key control strategy is valid for the urban multi-terminal VSC HVDC.

关 键 词：城市多端柔性直流输电 协调控制 混合实时仿真 模块化多电平换流器 

分 类 号：TM77[电气工程—电力系统及自动化]