Optimized configuration of energy storage devices of building photovoltaic system with phase-change energy storage

doi:10.3969/j.issn.1674-1951.2021.09.007

Abstract

Abstract:

With the expansion of cities,energy consumption of buildings is increasingly growing.The energy crisis and environmental pollution resulting from it are imminent. Therefore,constructing a micro-grid for buildings properly and consuming renewable energy thoroughly can effectively relieve the pressure of the power grid and realize its clean and low-carbon development.Aiming at the problems of low PV power consumption rate and large peak-valley load difference in building photovoltaic systems,a photovoltaic system with phase-change energy storage and its demand response mechanism are introduced. Under the premise of considering demand responses,a phase-change energy storage system is designed integrated with air conditioners, to jointly meet the temperature-controlled load of a building. The scheduling strategy is given,and an energy storage optimization model for the system is established.To minimize the system operation cost,taking particle swarm algorithm to solve the model,the optimized configuration of the energy storage system capacity can be obtained.Then,an economic and technical analysis is carried out on the system. Finally, five configuration schemes are compared based on case studies. The results show that the scheme proposed not only effectively reduces the cost,but also effectively improves the PV power consumption rate and reduces the peak-valley load difference.

Key words: phase-change energy storage, building photovoltaic system, demand response, PV power consumption rate, peak-valley load difference, microgrid for buildings, carbon neutrality

CLC Number:

TM73：TK01

WANG Qiuhui, SUN Liguo, LI Jiawen. Optimized configuration of energy storage devices of building photovoltaic system with phase-change energy storage[J]. Huadian Technology, 2021, 43(9): 54-61.

Figures/Tables 11

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负荷类别	时段	分时电价/ [元·(kW·h)^-1]
峰	(08:00,12:00]∪(18:00,23:00]	0.8
平	(07:00,08:00]∪(12:00,18:00]	0.6
谷	(23:00,24:00]∪(00:00,07:00]	0.3

方案	光伏消纳率/%	峰谷差/kW	日成本/ （元·d^-1）	满意度/%
无配置	0	513.269	5 474.72	23
仅PV	81.39	513.269	1 631.68	37
PV+DR	72.31	431.357	1 329.21	46
PV+PCM	97.45	512.587	1 659.52	53
PV+PCM+DR	88.83	349.485	762.29	60

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