基于不动点原理的电压稳定性分析方法

目前的电压稳定性分析方法中,基于戴维南等值的阻抗匹配法受到了广泛关注,但相关研究表明,这种方法应用于多负荷系统时可能产生不正确的结果。为此,提出了一种基于不动点原理的电压稳定性分析方法,介绍了经典的电压稳定性分析模型和不动点原理,并阐述了负荷电压稳定性评估判据。该方法具有计算量少、速度快的优点。将所提出的方法与基于戴维南等值的阻抗匹配法进行分析对比,论证了该方法的合理性。采用5机18节点算例系统进行了仿真测试,结果初步验证了基于不动点原理的电压稳定性分析方法的有效性。

VoltageStability Analysis Method Based on Fixed-point Principle

In current voltage stability analysis methods, the impedance matching method based on Thévenin equivalent is widely concerned. But the correlational research indicates this method may cause inaccurate results as used in multi-load power systems. Therefore, this paper proposes a kind of voltage stability analysis method based on the fixed-point principle, introduces typical voltage stability analysis models and the principles and expounds the evaluation criterion for load voltage stability. This method has advantages of less calculation and fast calculation. The proposed method is compared with the impedance matching method based on Thévenin equivalent which has demonstrated its rationality. The paper tests the method by using the 5-generators and 18-bus example system. The simulation result shows this voltage stability analysis method based on the fixed-point principle is effective.