电力系统静态安全混合控制方法

提出一种将预防控制和校正控制相协调的电力系统静态安全混合控制方法。预防控制模块中,利用风险指标确定进入预防控制模块的预想故障集,该风险指标考虑了预想故障发生的概率及其严重性,采用连续线性规划技术求解考虑多预想故障的静态安全预防控制策略。校正控制模块中,首先判断系统静态安全裕度是否满足要求,并考虑风电/光伏的随机波动特性,针对不安全故障分别制定校正控制策略。所提方法通过系统风险指标协调预防控制和校正控制中考虑的预想故障集,从而将预防控制和校正控制相互协调,以获得安全性和经济性均满足系统需求的静态安全控制策略。以我国某682节点系统的算例验证了所提方法的有效性。

Hybrid control of power system static security

A hybrid control method for the static security of power system is proposed to coordinate the preventive control with the corrective control. In the preventive control module, a system risk index is applied to determine the contingency sets, which considers the occurrence probability and severity of contingencies; the continuous linear programming technique is used to solve the multi-contingency preventive control strategy of static security. In the corrective control module, the unsatisfied static security margins are detected first, and with the consideration of the random fluctuations of wind /photovoltaic power generations, a corresponding corrective control strategy is then developed for each contingency. The proposed method adopts the system risk index to coordinate the contingency sets of both preventive control and corrective control for the coordination between preventive control and corrective control to obtain a static security control strategy, which meets the requirements of power system for both security and economy. Simulative results of a practical 682-bus system verify the effectiveness of the proposed method.