Research on Droop Control Strategy of Microgrid Based on Current Prediction

doi:10.11985/2015.09.014

Abstract

Abstract:

For inverter output impedance differences leading uneven distribution of power in microgrid island mode, this paper presented a control strategy based on P-U and Q-f. Based on changes in inverter output current, this paper presented the current predictive control algorithm, and used model predictive method for predicting the current and optimizing control parameters, reducing the voltage and frequency oscillation caused by disturbances. Through the simulation and calculation, this paper verifies the correctness and effectiveness of the proposed current predictive droop controller.

Key words: Microgrid, droop control, model predictive control, current prediction

CLC Number:

TM715

Li Bo,Yang Junyou,Wang Haixin. Research on Droop Control Strategy of Microgrid Based on Current Prediction[J]. Journal of Electrical Engineering, 2015, 10(9): 87-93.

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系统参数	数值
电网电压幅值U/V	380
直流侧电压U_dc/V	800
电网频率f_n/Hz	50
线路参数(R_line/X_line)/(Ω/km)	0.642/0.083
滤波电感L/mH	15
滤波电容C/mF	1.6
滤波电阻R/Ω	0.01
下垂系数1/a	0.002 42
下垂系数1/b	0.000 002
仿真采样周期T_s/μs	100