综合FACTS和HVDC协调优化的大规模风电脱网控制方法

随着交直流混联电力系统的快速发展，目前灵活柔性交流输电系统(FACTS)和特高压直流输电系统在我国电力系统中已得到广泛应用，为近年来我国风电大规模脱网问题提供了新的控制技术和有效手段。分析了系统交直流故障后的风电脱网场景，表明抑制故障后系统电压大幅波动是减少风电大规模脱网的关键。在此基础上，阐述了事故前FACTS优化配置和事故后采取HVDC紧急功率支援协调抑制风电大规模脱网的必要性。并基于对风电场汇集母线电压波动的改善灵敏度，以保证系统安全性为前提，通过协调优化事故前FACTS动态无功补偿设备布点、容量配置和事故后直流紧急功率支援，提出一种风电脱网控制代价最小的FACTS和HVDC的协调优化方法，实现风电脱网的抑制和电网的经济运行。最后，以实际规划电网进行了仿真验证，证明了该方法的有效性。

A method of synthesizing coordinated optimization between FACTS and HVDC for curbing large-scale wind turbine tripping

Along with the rapid development of AC-DC hybrid power system, flexible AC transmission system (FACTS) and HVDC transmission system has been widely used in electric power system, which provides a new control technology and effective means for curbing large-scale wind turbine tripping in china in recent years. The wind turbine tripping scene after the AC/DC faults is analyzed, which shows that suppressing large voltage fluctuation after fault is the key of reducing wind turbine tripping, and then the necessity of coordination between the optimal configuration of FACTS equipment before fault and HVDC emergency power support after fault for curbing wind turbine tripping is expounded. On the premise that power system is security and stability, it explores ways of solving the problem of large-scale wind turbine tripping through coordinated optimization between FACTS and HVDC with minimum cost control. Under the sensitivity index of improving the wind farm collection bus bar voltage fluctuation, it realizes curbing large-scale wind turbine tripping and economic operation of power grid through coordination optimization with pre-accident stationing and capacity configuration of FACTS equipment and post-accident HVDC emergency power support. At last, it is validated by a schedule power grid.