光伏并网发电系统的DSP控制与实现

叙述了应用DSP控制光伏并网发电系统的原理和方法。DSP通过对并网系统交流侧两相电流，并网系统直流侧电压的采样和电网侧电压频率与相位的检测，运用瞬时无功功率理论，得出解藕的有功电流和无功电流分量，分别对有功电流和无功电流进行带PI调节的闭环控制，从而向电网输出有功功率和进行无功补偿。实验结果验证了用DSP控制的光伏并网发电系统是有效的和可行的。

DSP Control and Realization in PV Grid-Connected System

The principle of applying DSP to control the PV grid-connected system is proposed in this paper. Two phase AC currents, DC side voltage, the frequency and the phase of the grid are sampled and detected by DSP. According to the theory of the instantaneous reactive power, we can acquire the uncoupling real power and the reactive power, which are close-loop controlled with the PI adjuster, thus the real power flowing into the grid and the power factor of local loads are controllable. The experiment result proves that the PV grid-connected system controlled by DSP is effective and feasible.