Research on comprehensive evaluation and regulation strategy of renewable energy system based on disordered charging behavior of electric vehicles

doi:10.19799/j.cnki.2095-4239.2025.0015

Abstract

Abstract:

As the penetration rate of electric vehicles (EVs) increases, their widespread integration significantly affects the power grid stability. To better absorb highly volatile renewable energy and manage uncertain EV charging demands, this study proposed a renewable energy system. The proposed system combines energy storage technology with wind power, photovoltaic power, and grid technology to create a renewable energy system. The disordered charging behavior of EVs was characterized using the Monte Carlo sampling method, and MATLAB was coupled with TRNSYS to build a dynamic system simulation model. An evaluation framework was proposed to comprehensively evaluate system performance across different time scales, technical forms, and control strategies. The analysis was based on three system control strategies. The results demonstrate that the system's annual energy matching index increased by up to 48.20%, its flexibility index decreased by up to 37.77%, and the environmental benefit index decreased by up to 6.59% after the introduction of energy storage technology. Through an orderly charging strategy, the system demonstrated strong performance metrics: an on-site energy fraction of 66.71%, on-site energy matching of 73.20%, grid integration level of 33.29%, and net interaction level of 52.63%. The proposed system effectively regulates loads, relieves pressure on the power grid, improves supply-demand mismatches due to EV loads, and decreases demand-side dependence on the power grid.

Key words: electric vehicles, renewable energy, Monte Carlo, energy storage, TRNSYS

CLC Number:

TK 519

Yanting LIU, Guohui FENG, Shasha CHANG, Yuqian CHENG, Yuming DING. Research on comprehensive evaluation and regulation strategy of renewable energy system based on disordered charging behavior of electric vehicles[J]. Energy Storage Science and Technology, 2025, 14(7): 2772-2781.

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结构类型	传热系数/[W/(m²·K)]
外墙	0.10
屋顶	0.10
地面	0.12
外窗	1.00

部件	参数设置
光伏阵列	峰值电压40.9 V，峰值电流13.45 A，光伏板数量7×8块，峰值功率550 W
风力发电机	额定功率20 kW
储能系统	蓄电池电量132.46 kWh，储能水箱容量7 m³
热泵机组	额定制冷功率19.76 kW，额定制热功率27.65 kW

策略	OEF/%	OEM/%	GIL/%	NIL/%
STR1	62.21	72.00	37.79	65.85
STR2	52.76	63.31	47.24	83.76
STR3	66.71	73.20	33.29	52.63