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将静止同步补偿器(static synchronous compensator,STATCOM)经电感电容(inductor-capacitor,LC)滤波器滤波后并入电网来调整和平衡配电网电压,通过对电网电压不平衡条件下STATCOM的负序等效电路分析,提出一种新的正、负序电压双环叠加控制策略。正序电压控制环控制公共连接点电压为给定值,负序电压控制环实现公共连接点电压三相对称控制。新控制策略基于瞬时功率平衡思想,采用神经元自适应算法来整定比例积分微分(proportional-integral-derivative,PID)控制参数,具有成本低、鲁棒性好等特点,可在电网电压不平衡时有效地调节和平衡配电网电压。仿真和实验结果表明该方法的有效性。
The static synchronous compensator (STATCOM) is filtered by an inductor-capacitor (LC) filter and then fed into the grid to adjust and balance the distribution network voltage. Through the negative sequence of the STATCOM under unbalanced grid voltage Equivalent circuit analysis, a new positive and negative sequence voltage double loop superimposed control strategy is proposed. The positive sequence voltage control loop controls the common connection point voltage to a given value, and the negative sequence voltage control loop realizes the three-phase symmetrical control of the voltage of the common connection point. Based on the idea of instantaneous power balance, the new control strategy uses the neuron adaptive algorithm to adjust the proportional-integral-derivative (PID) control parameters, which has the characteristics of low cost and good robustness. When the grid voltage is unbalanced Adjust and balance the distribution network voltage effectively. Simulation and experimental results show the effectiveness of the method.