基于实用动态安全域的电力系统安全性综合控制

A COMPREHENSIVE SECURITY CONTROL METHOD BASED ON PRACTICAL DYNAMIC SECURITY REGIONS OF POWER SYSTEMS

基于实用动态安全域(PDSR)的边界可用超平面表示的事实及扩展实用动态安全域临界面的迁移规律,给出了一种最优安全性综合控制的新方法。该方法以综合控制总成本为目标函数,以超平面形式的不等式为暂态稳定约束,将安全性综合控制问题归结成一个最优化问题。针对该优化问题的特点,提出了一种“积极约束松弛法”的优化策略,它能将预想事故集分解成使控制总成本最小的2个子集,并分别由预防控制和紧急控制保证其中事故的安全性。在新英格兰10机39节点系统上的仿真算例验证了文中所提优化策略的有效性,也表明综合控制方案远比纯预防控制方案和纯紧急控制方案经济。

Based on the fact that the boundaries of the practical dynamic security regions （PDSR） can be approximately expressed as hyper-planes and the experiential laws about the extended PDSR, this paper develops a new comprehensive security control method that takes both preventive and emergency control actions into consideration. Taking the total control cost as the objective function and the inequalities in form of hyper-planes as the transient stability constraints, the comprehensive control is converted into an optimization problem. Aiming at the characteristic of this problem, this paper proposes an optimization strategy called ＂the active restriction relaxation approach＂ which can classify the contingency set into two subsets. Then the preventive control and the emergency control respectively maintain the security of the system for each subset. Simulation results conducted on New England System show that the comprehensive method is much more economical than pure preventive control scheme or pure emergency control scheme.