Due to the random interference of voltage fluctuation, the power consumption value is large when actually compensating voltage quality. In view of this problem, a compensation algorithm for sudden voltage drop at the transmission end of distribution network considering the uncertainty of wind power is proposed. Build the Internet of things monitoring architecture for the multi-parameter operation of the transmission end of the distribution network, design a multi-channel acquisition circuit based on this, initially obtain the multi-parameter operation of the transmission end of the distribution network, and build a parameter identification equation to identify the operating parameters of the transmission end of the distribution network. Based on the obtained multi parameters of distribution network equipment operation, a compensation strategy is established. Based on the bus of the regional power station, the power flow calculation method of the regional power grid is constructed, and the topological structure of the regional voltage control points is obtained. The points in the structure are used as the voltage quality evaluation points, and the optimal control function relationship is constructed. Combined with different voltage control results, the sudden drop compensation of the voltage operation state at the transmission end of the distribution network is finally completed. The experimental results show that the controllable voltage value of the compensation algorithm is higher, and the network loss rate is lower, which has a good compensation effect.

In the isolated island operation of microgrids, affected by the different equivalent circuit impedance between distributed generators, the traditional droop control cannot evenly divide the reactive power borne by distributed generators according to the different line impedance. Therefore, firstly, the reasons affecting power sharing are analyzed, and then an improved droop control method based on traditional droop control is proposed; that is, the time change rate of voltage is used as the droop variable, and a voltage recovery mechanism is added to the reactive droop controller, in order to adjust the reciprocal of voltage to zero in the steady state, so as to stabilize the voltage. Aiming at the problem that the droop controller cannot always realize the equal distribution of reactive power, a voltage compensation link suitable for improved droop control is designed and added to eliminate the line impedance difference between distributed generators and improve the accuracy of reactive power distribution. Finally, the effectiveness and feasibility of the proposed control strategy are verified by building a “wind light storage load” microgrid simulation model on the MATLAB / Simulink platform.