摘要
切除发电机会减小系统的惯性时间常数,进而影响系统的暂态稳定水平。根据惯性时间常数变化对系统暂态稳定水平产生的影响和线性规划理论,提出了一种电力系统暂态稳定紧急控制下最优切机控制的控制变量权值的取值方法。合理地调整切机控制量权值的大小,使经加权后计算得到的控制策略能够提高系统的暂态稳定水平,从而改进控制策略和控制效果,且物理意义明确。通过新英格兰39节点算例验证了所提出的切机控制变量权值取值方法的有效性。
A scheme to value the control variable weights of optimal generator-shedding control for emergency control of power system transient stability is proposed in this paper. Since the inertia of power system would decrease because of generator-shedding, the power system transient stability level is changed. In this paper, the generator-shedding control variable weights are regulated based on the influence of the inertia changing on the transient stability level and linear programming theory. Then the control strategy obtained by calculation can make the power system transient sta- bility level raise after the control variables are weighted. This method improves the result of generator-shedding con- trol, and its physical meaning is definitive. The effectiveness of regulating the control variable weights proposed in this paper is verified by the simulation results of New Egland-39 bus system.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2013年第5期54-59,共6页
Proceedings of the CSU-EPSA
基金
中央高校基本科研业务费专项资金科技创新项目(SWJTU11CX036)
关键词
暂态稳定
紧急控制
最优控制
切机控制量权值
惯性时间常数
transient stability
emergency control
optimal control
generator-shedding control variable weight
inertia time constant
