低压微型电网控制策略研究和仿真

Research and simulation on control strategy of low voltage micro-grid

微型电网是一种特殊形式的有源配电网,考虑到不同类型的微源和负荷具有分散性的特点,对低压微型电网中的微源进行协调控制是需要解决的关键问题。分析了低压微型电网在不同运行模式下不同的控制策略,完成了低压微网有功无功(P/Q)控制器和电压频率(V/f)控制器的设计,并利用MATLAB/Simulink仿真平台分别对低压微电网联网到孤岛切换、孤岛模式下切/增负荷以及重新联网情况下的运行特性进行仿真分析。通过仿真结果,验证了上述低压微网控制策略的正确性。

Micro-grid is a kind of special form of active power distribution network. Considering the dispersion of different types of the micro-sources and loads, the power coordination strategies for micro-sources in the low voltage micro-grid is the key problems need to be solved. The different control strategies of low voltage micro-grid in different operation mode were analyzed, and the active/reactive （P/Q） controller and voltage/frequency （V/f） controller of low voltage micro-grid was designed. Through the low voltage micro-grid connected operation switching to islanded operation, cutting/increasing load in islanded operation and reconnected operation, the simulation analysis wass done in MATLAB/Simulink platform. Through the simulation results, the low voltage micro-grid control strategy was verified correctly.