配电网中光伏电源的无功电压控制

Distribution Network Reactive Power Voltage Control for Photovoltaic Power Supply

建立光伏电源并网仿真模型,首先注入纯有功功率,研究并网光伏电源对系统各个节点电压分布的影响;然后应用各种控制方法在不同电源功率和不同负载情况下分别进行仿真实验,研究各类控制方法的稳态适应性;比较各种控制方法在电源功率有阶跃变化情况下的响应时间,研究其动态响应,提出优化无功功率控制法,然后通过逆变器并网实验,验证控制方法的可行性;最后总结控制方法,指出各自的适用场合和无功电压控制法的缺陷。

A grid-connected photovoltaic power simulation model is built in Matlab/Simulink.First,pure active power is injected, in order to study the influence of voltage on each node.Then every reactive power control strategy is used to study the static and dynamic characteristics of the gird, and a new optimal reactive power control strategy is brought up.A series of experiments on grid-connected inverters have been operated to verify the feasibility of the control methods.At last summary will come into conclusion, and their repective applications and the shortcoming of reactive power voltage control method will be pointed out.