考虑无功功率协调控制的并行直流系统紧急功率支援  

Emergency DC Power Support with Reactive Power Coordinated Control for Multi-circuit HVDC Systems

作　　者：王珂[1] 杨胜春[1] 姚建国[1] 李亚平[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《电力系统自动化》2011年第18期103-107,共5页Automation of Electric Power Systems

基　　金：国家电网公司科技项目(SG11003)~~

摘　　要：直流系统紧急功率支援需要考虑无功功率协调控制以提高系统电压稳定水平。文中分析推导了直流系统有功功率输送和无功功率消耗的比例关系,研究了多直流系统相互间紧急功率支援时导致的换流站近区暂态电压跌落问题,提出了紧急投入备用无功功率、充分利用故障直流无功功率补偿能力和交直流系统间功率分配的协调控制等策略,以实现无功功率的合理分布。基于实际交直流电网的仿真结果验证了所提控制策略的有效性。Coordinated control of reactive power needs to be considered when a DC power system provides emergency DC power support（EDCPS） to improve system voltage stability.The ratio between active power transmission and reactive power consumption of high voltage direct current（HVDC） system is analyzed and derived.Then transient voltage dip near converter station caused by EDCPS among multi-circuit HVDC systems is studied.In order to implement reasonable distribution of reactive power,some strategies such as： emergency inputting spare reactive power,fully using reactive power compensation ability and coordinated control for active power between AC and DC system,etc.are proposed.Simulation results based on practical AC and DC power systems verify the effectiveness of the control strategies proposed.

关 键 词：直流输电 紧急功率支援 电压稳定 无功功率控制 紧急控制 协调控制 

分 类 号：TM721.1[电气工程—电力系统及自动化]