并网光伏发电系统低压穿越暂态特性研究

Grid Photovoltaic Power Generation System Low Voltage Through the Transient Characteristic Research

针对并网光伏发电系统发生对称故障时对电网各电气参数产生的影响,研究了光伏电池板发电的工作原理及其运行状态下所采取的控制策略,搭建了光伏电池板的数学模型,并在此基础上深入研究了当电网侧发生三相短路时的暂态运行特性,通过在Matlab/Simuink中加以仿真验证,当电压降低时,该控制方法能够快速发出无功功率来支撑并网点电压的恢复,结果验证了该并网控制策略的正确性和有效性,理论分析与仿真结果吻合,为进一步研究光伏电站的低电压穿越问题奠定了基础.

According to the symmetrical fault occurs a grid photovoltaic power generation system in the im- pact of the electrical parameters, studied the working principle of photovoltaic panels, power generation and its control strategy to be adopted in the running state, set up a mathematical model for the pv panels, on the basis of in-depth study when the three-phase short-circuit at the side of the grid occur in the transi- ent state characteristic, through the simulation in Matlab/Simuink, when the voltage is lower, the control method can quickly send the recovery of reactive power to support and node voltage, the results verify the correctness and effectiveness of the grid-connection control strategy, the theory analysis and simulation re- sults, for the further research of the photovoltaic power station low voltage through the problem laid a sol-id foundation.