Energy regulating and fluctuation stabilizing by air source heat pump and battery energy storage system in microgrid

Highlights

Application of Air Source Heat Pump in a PV/BESS microgrid.

Fluctuation stabilization strategy is proposed.

Reduce the capacity of BESS and cost of microgrid.

Improved Double Fuzzy Logic algorithm is proposed.

Abstract

The energy consumption statistics of buildings have shown that in China, 50%–70% of the annual energy consumption is consumed by cooling and heating systems, the majorities are air conditions and hot water supply. To cut down the investment of BESS, this paper studies the application of Air Source Heat Pump (ASHP) in a photovoltaic/Battery Energy Storage System (PV/BESS) microgrid. Energy dispatching strategy is proposed to take advantage of the thermal storage, and fluctuation stabilization strategy is proposed based on the decouple characteristics between Heat Pumps (HPs) and terminal devices. As the characteristics of fluctuation and the inputted capacity of ASHP should be considered during the stabilization, there are too many input variables for traditional fuzzy logic algorithm. According to this, this paper proposes an improved fuzzy logic algorithm, Double Fuzzy Logic (DFL) algorithm, to involve in all the necessary variables. At last, a case is simulated to verify the feasibility of the energy dispatching and fluctuation stabilization strategy. The results have verified that ASHP can decrease the capacities of PV/BESS and stabilize the fluctuation effectively.

Keywords

  • Microgrid energy management;
  • Fluctuation stabilize;
  • Battery energy storage system;
  • Air source heat pump;
  • Double fuzzy logic

Lian Yang He was born in Anhui, China, in May 1988. He received the B·Sc. degree in electrical engineering from Hefei University of Technology, Hefei, China, in 2010. From 2010, he is studying for the Ph.D. degree in electrical engineering from Shanghai Jiao Tong University, Shanghai, China. Besides, he is now positioned as BOND researcher in Innovation and Technology Department of GE Grid Solution (former Alstom Grid), UK. His research interests conclude the control strategy of active distribution systems and smart grid.

Nengling Tai He received the B.Sc., M.Sc., and Ph.D. degrees in electrical engineering from Huazhong University of Science and Technology(HUST), Wuhan, China, in 1994, 1997, and 2000, respectively. Currently, he is the associate present and professor in the Department of Power Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China.

Chunju Fan She was born in Jiangsu, China, in May 1967. She received the B.S. degree in electrical engineering from Hefei University of Technology, Hefei, China, in 1990, the M.S. degree in electrical engineering from Tianjin University, Tianjin, China, in 1993, and the Ph.D. degree in electrical engineering from Shanghai Jiao Tong University, Shanghai, in 2005. Currently, she is an Associate Professor at Shanghai Jiao Tong University, where she has been since 1993.

Yuanye Meng He received his M.Eng degree (with honors) in Electrical Engineering from University of Southampton, UK. He is now positioned as a researcher in Innovation and Technology department of GE Grid Solution (former Alstom Grid), UK. His current research interest is advanced microgrid energy management.

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