适用于电力系统暂态稳定分析的网络电压解析算法研究  

Research on network voltage analysis algorithm suitable for power system transient stability analysis

作　　者：康卓然 张谦 陈民权 甘德强[1] KANG Zhuoran;ZHANG Qian;CHEN Minquan;GAN Deqiang(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院电机系,浙江杭州310027

出　　处：《电力系统保护与控制》2021年第3期32-38,共7页Power System Protection and Control

基　　金：国家重点研发计划项目资助(2016YFB0900600)。

摘　　要：工程上大量采用数值仿真方法分析系统运行稳定性,通过交替迭代求解微分-代数方程组来评估系统是否稳定,但解析程度低是其固有的缺点。为了弥补这一不足,利用Dommel-Sato迭代,针对不同的负荷模型,提出了一种求解网络电压封闭解的解析方法。该方法可以将暂态稳定分析数学模型中的微分方程与代数方程解耦,使得稳定问题转化为求解全微分方程组,避免了求解过程的交替迭代。在此基础上,利用网络电压的封闭解,提出了一种快速计算系统故障后短期电压的方法。通过与PSD-BPA仿真结果进行比较,表明了所提方法能快速、准确地计算系统故障后的短期电压。In engineering,the main method used to analyze the stability of a system is to solve a set of differential-algebraic equations by alternating iterative methods,but the low degree of analysis is its inherent disadvantage.In order to make up for this shortcoming,an analytical method for solving the network voltage closed solution is proposed for different load models using the Dommel-Sato iteration.This method can decouple the differential equation and the algebraic equation in the mathematical model,and then the mathematical model of transient stability analysis is transformed from the differential-algebraic equations to total differential equations,avoiding the alternating iteration of the solution process.Based on the closed solution of the network voltage,a method for quickly calculating the short-term voltage after a system fault is proposed.Comparison with the PSD-BPA simulation results shows that the method can quickly and accurately calculate the short-term voltage after a system fault.

关 键 词：Dommel-Sato迭代 网络方程 离散线性系统 非线性负荷 稳定分析 

分 类 号：TM712[电气工程—电力系统及自动化]