电力系统扰动后稳态频率预测快速算法

摘要

, The accuracy and complexity of power system frequency stability analysis direct methods based on the WAMS (wide area measurement system) are studied, and a fast predictive algorithm for power system post disturbances steady frequency is proposed.The power system simulation software PSS/E is used to simulate the IEEE's 50-generator modified test system.The impacts of different load models on power system post disturbances steady frequency are compared.The proposed fast algorithm is achieved by using the Monte Carlo method.WAMS data right after disturbances is used to fast predict the steady frequency.System steady frequency by prediction is quite close to the steady frequency by PSS/E simulation.The results prove that the proposed fast algorithm has fast resolving speed and high accuracy.%研究了基于广域量测系统的电力系统频率稳定分析直接法的精度和复杂度,提出了电力系统扰动后稳态频率预测快速算法.利用电力系统仿真软件PSS/E对IEEE50机改进测试系统进行了仿真试验,比较了不同负荷模型方案对系统扰动后稳态频率的影响.通过蒙特卡洛法求解实现了所提出的快速算法,它利用扰动后瞬间的广域量测数据,快速预测出系统扰动后的稳态频率.预测的稳态频率与PSS/E仿真得到稳态频率相比很接近,表明该快速算法求解速度快,精度高.