基于功率灵敏度分析的断面潮流安全控制方法

Security Control Method for Interface Power Flow Based on Power Sensitivity Analysis

为提高电网的输电能力和系统稳定性,提出了一种基于支路功率灵敏度分析的断面潮流安全控制的方法。利用灵敏度分析的基本原理,构造了支路功率、系统参数及节点功率注入之间的灵敏度指标,并分析其在支路潮流控制中的作用。基于潮流方程推导了灵敏度指标计算公式,给出基于灵敏度指标的断面潮流关键影响因素的判别流程以及安全性控制思路,在断面潮流控制精度及控制能力上有很大提高。并通过对某地区实际电网的仿真算例验证了该分析方法的有效性和可行性。

To improve the transfer capability and stability of power system,the paper proposes a safe control method for interface power flow based on branch power sensitivity analysis. Based on the principle of the sensitivity analysis, the paper establishes power sensitivity index among the branch power, system parameters and node power injection, and analyzes its effects on the interface power flow control. According to power flow equation, the paper deduces the computing formula of the index, and gives the process to discriminate the key factors influencing the interface power flow based on the index and security control scheme, improving the interface power flow control precision and control ability. Finally, the effectiveness and feasibility of the proposed method is verified by the simulation results of a regional power grid.