逆变型微网状态空间方程的分析与建立  

Analysis and Establishment of State-space Equations for Inverter-interfaced Microgrid

作　　者：肖朝霞[1] 赵倩宇[1] 方红伟[2] 

机构地区：[1]天津工业大学电工电能新技术天津市重点实验室,天津市300387 [2]天津大学电气与自动化工程学院,天津市300072

出　　处：《电力系统自动化》2015年第2期39-45,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51107088;51007060)~~

摘　　要：通过对逆变型微网中逆变型分布式电源、滤波环节、等效线路等的惯性时间常数和系统特征值分析,提出了不同电压等级微网可以采用不同状态空间方程进行微网小信号稳定性分析。对400V母线的逆变型微网,其电网络方程应采用稳态方程;对10kV母线及以上电压等级的逆变型微网,其电网络方程应采用微分方程。系统特征值分析和时域仿真证明了该结论的正确性。By an analysis of the inertia time constants and system eigenvalues of inverter-interfaced distributed sources, the filter, the equivalent line of an inverter-interfaced microgrid, it is proposed that microgrids of different voltage levels can analyze the small signal stability using different state-space equations. For an inverter-interfaced microgrid of 400 V bus, steady-state equations of the electrical grid part should be adopted, while for a microgrid of 10 kV bus or higher voltage levels, differential equations should be used. Eigenvalue analysis and simulations have demonstrated the correctness of the conclusions.

关 键 词：微网(微电网) 逆变器 惯性时间常数 状态方程 特征值 分布式电源 

分 类 号：TM711[电气工程—电力系统及自动化]