内容：
提出了局部阴影条件下基于模块化多电平(MMC)的光伏并网系统,并设计了该系统的控制策略。光伏阵列经DC-DC变换电路调节后并入电压源型换流器,构成子模块PSM,子模块PSM和电抗器串联组成MMC。控制系统包括启停控制、最大功率点控制以及并网控制。启停控制,在能量反馈阶段采用直流电压控制策略,在电容放电阶段采用三相同时放电策略;最大功率点跟踪控制采用扰动观测法。利用Matlab/Simulink对光伏并网系统进行仿真,仿真结果表明:该系统能提高太阳能利用率,降低并网输出波形的谐波含量,实现功率独立控制。 A modular multi - level (MMC) - based photovoltaic grid - connected system under local shadow conditions is proposed, and the control strategy of the system is designed. The PV array is tuned by the DC-DC converter circuit and is incorporated into the voltage source converter. The sub-module PSM, the sub-module PSM and the reactor are connected in series to form the MMC. The control system includes start and stop control, maximum power point control and grid control. Start and stop control, in the energy feedback stage using DC voltage control strategy, in the capacitor discharge phase using three simultaneous discharge strategy; maximum power point tracking control using disturbance observation method. The simulation results show that the system can improve the utilization rate of solar energy and reduce the harmonic content of the output waveform, and realize the independent control of power.

文件列表（点击上边下载按钮，如果是垃圾文件请在下面评价差评或者投诉）: