Microgrid Stability Control Based on Adaptive Rotating Inertia VSG

doi:10.11985/2020.01.006

Abstract

Abstract:

In order to deeply analyze the mechanism of adaptive rotary inertia virtual synchronous generator (VSG) control on frequency stability of microgrid, based on the mathematical model of conventional VSG, using the power-angle characteristic curve of synchronous generator and the period curve of rotor angular velocity oscillation, the mechanism of adaptive rotary inertia on frequency stability of microgrid is analyzed, and the control strategy of adaptive rotary inertia VSG is proposed. The key parameters are tuned and designed. The results show that the system stability and dynamic performance of VSG control strategy with adaptive rotating inertia are better under load disturbance. Compared with the conventional VSG control strategy, the frequency fluctuation and output power overshoot are significantly suppressed. Finally, the simulation model of adaptive rotary inertia VSG control strategy is established, and the effectiveness of the method is verified by simulation.

Key words: Microgrid, virtual synchronous generator, rotary inertia, adaptive control

CLC Number:

TM64

ZHU Zuobin,HUANG Shaoping. Microgrid Stability Control Based on Adaptive Rotating Inertia VSG[J]. Journal of Electrical Engineering, 2020, 15(1): 41-47.

Figures/Tables 15

References 18

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区间	Δω	dω/dt	Δω(dω/dt)	J
[t₁,t₂]	>0	>0	>0	增加
[t₂,t₃]	>0	<0	<0	减少
[t₃,t₄]	<0	<0	>0	增加
[t₄,t₅]	<0	>0	<0	减少

参数	数值
有功功率参考值P_ref/kW	20
无功功率参考值Q_ref/kW	0
电压V_dc/V	800
滤波电感L/H	0.000 3
滤波电容C/F	0.000 1
额定电压幅值U_n/V	311
阻尼系数D₀	20
调节系数k_j	20
转动惯量J₀/(kg·m²)	0.5
频率f_n/Hz	50