基于同步发电机方程的微网逆变电源控制策略

Control Strategy of Converter in Micro Grid Based on Equation of Synchronous Generator

借助电力储能装置,将常规电力系统中同步发电机数学模型应用到新能源发电系统控制算法中,设计了一种新的逆变电源控制策略。模拟同步发电机运行原理,设计虚拟励磁控制器来控制逆变电源的输出无功功率和端电压,设计虚拟转矩控制器来控制逆变电源的输出有功功率和频率。在Matlab/Simulink中搭建模型仿真并进行实验,结果表明所设计的微网逆变电源具有良好的下垂特性和可调的转动惯量,可有效减缓负载有功功率冲击引起的频率突变。

With the power energy storage device, synchronous generator mathematical model in conventional power sys- tem is applied into new energy power generation system control algorithm to design a new converter control strategy. Synchronous generator operation principle is imitated, virtual excitation controller is designed to control out voltage and reactive power,and virtual torque controller is designed to control out frequency and active power.The simulation mo- del is put up using Matlab/Simulink and the experiments are done.The simulation and the experimental results show that micro grid converter based on five-order equation of synchronous generator has good droop characteristic and adjustable of moment of inertia and could reduce frequency discontinuitv caused bv active rmwer imnA^t.