光伏系统中电压谐波补偿控制算法的研究

摘要

Due to the serious harmonic from the non-linear loads and power electronics equipment in the photovoltaic power system , a PV control er to compensate the voltage of the PCC was design. An AC signal was transformed to be a DC signal from abc-axis to αβ-axis by Clark . Using the DC signal to control and deliver, the grid voltage harmonics were inhibited effectively, and the power quality was improved by the compensated voltage at the PCC. And the correctness and feasibility of the control system was verified by the result of the simulation model through Matlab.%针对光伏发电系统入网运行中非线性负载和电力电子设备产生的电网谐波问题，设计了一个在公共连接点(PCC)处进行电压谐波补偿的光伏控制器，采用Clark变换将其放在αβ参考系下，用直流信号进行数据传送与控制，有效抑制了电网电压谐波，并对PCC处电压进行了补偿，提高了电网电能质量。最后通过Matlab搭建出仿真模型，验证了该控制系统的正确性及可行性。