摘要
基于交流优化潮流问题中,不等式约束条件的拉格朗日乘子的物理意义,采用灵敏度分析方法,进行FACTS装置的最优配置,以提高任意扰动下目标电网的可靠性;并基于该最优配置方法,针对FACTS设备对目标电网长期可靠性的影响进行了研究。仿真结果表明,在长期时间框架下,FACTS设备的装设,在一定程度上降低了系统发生停电事故的频率,由于FACTS调节能力和容量有限,对大规模停电事故的抑制能力较差;且不同的线路扩建容量,FACTS的容量及不同的系统运行优化目标均会影响电网的长期发展,进而给系统的长期可靠性带来不同影响。
The paper proposes a new method for FACTS＇ optimal location by using of Lagrangian multipliers of inequality constraints to find the most sensitive position, where little changes on the power flow limits or voltages＇ limits could change the value of the objective function in our expected direction the most. Based on the algorithm, the effects of FACTS on the reliability of the power system are studied under the long-term frame. Test results show that under the long-term frame, FACTS can reduce the frequency of outages to some extent, but due to the capacity limit of FACTS, there is no big improvement on the alleviation on the risk of large blackouts. Moreover, differences on line upgrade capacity, FACTS＇ capacity and the object of system optimal operation affect the long-term development of the power system, then affect the reliability of the system in different ways.
出处
《电网与清洁能源》
2013年第4期50-55,共6页
Power System and Clean Energy
