基于RTDS的光伏逆变器接入薄弱电网仿真测试及研究

Simulation test and study of photovoltaic inverter connected to weak power grid based on RTDS

采用物理试验平台对光伏逆变器进行功能验证,存在测试工况少而无法反映各种极端工况的问题。采用数字物理混合的半实物仿真方法,能够便捷提供准确的实验条件且风险可控,试验成本低。通过研究薄弱电网的电气特性,基于实时数字仿真(RTDS)系统搭建薄弱电网下的光伏并网系统硬件在环仿真平台,并基于该平台开展低电压穿越及高电压穿越测试。通过对仿真结果分析,验证了该仿真方法的可行性和有效性。

Physical test platform is used to verify the function of photovoltaic inverter,but there is a problem that there are few test conditions and can not reflect all kinds of extreme conditions.The hardware-in-the-loop simulation method of digital physics mixture can provide accurate experimental conditions conveniently and with controllable risk and low experimental cost.By studying the electrical characteristics of weak power grid,a hardware-in-the-loop simulation platform of photovoltaic grid-connected system under weak power grid is built based on real time digital simulation(RTDS)system.Low voltage traverse and high voltage traverse tests are carried out based on this platform.By analyzing the simulation results,the feasibility and effectiveness of the simulation method are proved.