High-permeability Distributed Power Control Method

doi:10.12096/j.2096-4528.pgt.19093

Abstract

Abstract:

In view of the increasing permeability of renewable energy in microgrid, the problems of inertia and insufficient damping of microgrid are more and more prominent. The distributed power control has become a prerequisite for the control and reliable operation of microgrid. According to the basic principles of three typical micro-power control methods (i.e., PQ, V/f and Droop), and the new overall control strategy based on VSG, the simulation models were built in the Matlab/Simulink environment. Moreover, the correctness and effectiveness of the designed models were verified. The results show that the designed models can be used to study the off-grid and grid-connected operation of microgrid. The models have good versatility and scalability, and can provide a reference for the control of microgrid.

Key words: microgrid, distributed power, Matlab/Simulink, control method

CLC Number:

TK01
TM74

Yonggeng LU, Jiangang LI, Yuming HUANG, Baiyu LI. High-permeability Distributed Power Control Method[J]. Power Generation Technology, 2021, 42(1): 103-114.

Figures/Tables 24

References 22

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模块	参数设置
DG	V_dc=800 V，r=0.01Ω，L=0.009 H，C=500 μF
PQ	0~0.5 s：P_ref=40 kW，Q_ref=30 kV·A 0.5~1.0 s：P_ref=45 kW，Q_ref=47 kV·A 电流环：k_ip=30，k_ii=100
负载	P=50 kW，Q=0 kV·A
配电网	三相对称，$u = 220\sqrt 2 \sin \left( {100{\rm{ }}\pi t} \right)$

模块	参数设置
DG	V_dc=800 V，r=0.01Ω，L=0.009 H，C=500 μF
PQ	0~0.5 s：P_ref=40 kW，Q_ref=30 kV·A 0.5~1.0 s：P_ref=45 kW，Q_ref=47 kV·A 电流环：k_ip=30，k_ii=100
负载	P=50 kW，Q=0 kV·A
配电网	三相对称，$u = 220\sqrt 2 \sin \left( {100{\rm{ }}\pi t} \right)$

模块	参数设置
微电源	V_dc=1 000 V，R=0.1Ω，L=800 μH，C=500 μF
V/f	0~0.5 s：U_load-ref=220 V(负载相间电压有效值) 0.5~1.0 s：U_load-ref=380 V 电流环PI：k_ip=10，k_ii=2 000 电压环P：k_p=0.5
负载	P=50 kW，Q=0 kV·A

模块	参数设置
微电源	V_dc=1 000 V，R=0.1Ω，L=800 μH，C=500 μF
V/f	0~0.5 s：U_load-ref=220 V(负载相间电压有效值) 0.5~1.0 s：U_load-ref=380 V 电流环PI：k_ip=10，k_ii=2 000 电压环P：k_p=0.5
负载	P=50 kW，Q=0 kV·A

模块	参数设置
DG	V_dc=1 000 V，r=0.01Ω，L=800 μH，C=500 μF
Droop	0~0.5 s，负载1、2同时运行；0.5 s，切除负载2 $ a={\rm{e}}^{5}，b=\rm{1/}3{\rm{e}}^{5}$，P_n=50 kW，f_n=50 Hz，U_n=380 V 电流环PI，k_ip=10，k_ii=2 000；电压环P，k_p=0.5
负载1	P₁=60 kW，Q₁=7.8 kV·A
负载2	P₂=15 kW，Q₂=7.2 kV·A