An improved droop control method for wind-PV-storage DC microgrids
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 6
Abstract
In the wind-photovoltaic (PV)-storage DC microgrid, the use of droop control ensures the proportional power sharing between parallel power sources without the need for communication between the sources. However, the traditional droop control does not enable the output of the maximum PV and wind turbine (WT) power. Therefore, this paper proposes an improved droop control method that combines the maximum power point tracking (MPPT) algorithm with droop control. The method can not only ensure that PV and WT output the maximum power, but also realize the power sharing with the energy storage system (ESS). In order to verify the effectiveness of the improved method, we conducted simulations using MATLAB/Simulink and compared it with the traditional droop control method. The simulation results showed that in a typical system consisting of 5 kW PV, 7.34 kW WT and 10 kW load, under the same operating environment, the improved droop control method could increase the PV power supply ratio up to 8%, the WT power supply share by up to 9%, and the battery energy storage share by up to 10%, while the DC bus voltage fluctuation was basically unchanged. The improved droop control method has obvious advantages over the traditional method in the wind-PV-storage DC microgrid, which is of great significance for improving the overall performance and reliability of the system.
Authors and Affiliations
HAN Ai|State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal Fired Air Pollution Control, Zhejiang University, China, LIN Junhong|State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal Fired Air Pollution Control, Zhejiang University, China, ZHANG Yu|State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal Fired Air Pollution Control, Zhejiang University, China, LIU Shaojun*|State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal Fired Air Pollution Control, Zhejiang University, China, Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province, Zhejiang University, China, SONG Hao|State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal Fired Air Pollution Control, Zhejiang University, China, Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province, Zhejiang University, China, WU Weihong|State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal Fired Air Pollution Control, Zhejiang University, China, Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province, Zhejiang University, China, ZHENG Chenghang|State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal Fired Air Pollution Control, Zhejiang University, China, Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province, Zhejiang University, China
Keywords
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- EP ID EP738052
- DOI 10.20078/j.eep.20230906
- Views 6
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