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Efficiency Optimization of a Variable Bus Voltage DC Microgrid
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DOI：10.3390/en11113090.png)
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摘要
En 中文
A variable bus voltage DC microgrid (MG) is simulated in Simulink for optimization purposes. It is initially controlled with a Voltage Event Control (VEC) algorithm supplemented with a State of Charge Event Control (SOCEC) algorithm. This control determines the power generated/consumed by each element of the MG based on bus voltage and battery State of Charge (SOC) values. Two supplementary strategies are proposed and evaluated to improve the DC-DC converters' efficiency. First, bus voltage optimization control: a centralized Energy Management System (EMS) manages the battery power in order to make the bus voltage follow the optimal voltage reference. Second, online optimization of switching frequency: local drivers operate each converter at its optimal switching frequency. The two proposed optimization strategies have been verified in the simulations.
Keyword:
DC micro grid
efficiency optimization
variable bus voltage MG
variable switching frequency DC-DC converters
centralized vs
decentralized control
local vs
global optimization
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期刊
IF:
3.2
论文数:
1.5W
被引数:
14.2W
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