考虑线路分布参数的并网系统稳定性分析  

Stability Analysis of Grid Connected System Considering Line Distribution Parameters

作　　者：张雪丽 杨洪耕[1] 王杨 高红均[1] ZHANG Xueli;YANG Honggeng;WANG Yang;GAO Hongjun(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院,四川成都610065

出　　处：《智慧电力》2021年第4期44-50,共7页Smart Power

基　　金：国家自然科学基金资助项目(51907133)。

摘　　要：针对电缆分布参数在并网系统中引发的稳定性问题,提出一种考虑线路分布参数的输入导纳修正判据。首先,通过多层变量代换与适当简化形成实数域的并网系统电导和电纳模型,建立考虑线路分布参数的线路双曲函数并网系统简化模型;其次,验证输入导纳判据对于考虑线路分布参数的并网系统稳定性分析的适应性,分析系统短路比、线路长度、线路参数对于并网系统稳定性的影响;最后,通过Simulink仿真与传统方法的对比分析,验证了所提方法的正确性和有效性。In the light of the stability problem resulted from cable distributed parameters in grid connected system,a modified input admittance criterion considering line distributed parameters is proposed.Firstly,a real variable conductance and susceptance model of grid connected system is formed by multi-layer variable substitution and appropriate simplification,and then a simplified hyperbolic function model of grid connected system considering line distribution parameters is established.Secondly,the adaptability of input admittance criterion for stability analysis of grid connected system considering line distribution parameters is verified,and the effect of short-circuit ratio,line length and line parameters on the stability of grid connected system are analyzed.Finally,by comparing the traditional method with Simulink simulation,the correctness and effectiveness of the proposed method are verified.

关 键 词：线路分布参数模型 输入导纳判据 稳定性分析 失稳频段 

分 类 号：TM712[电气工程—电力系统及自动化]