Optimal scheduling strategy of distributed PV‒energy storage systems based on PV output characteristics

doi:10.3969/j.issn.2097-0706.2024.04.003

Abstract

Abstract:

With the transformation and upgrading of China's energy mix， solar power generation technology has received increasing attention. However， large-scale grid-connection of distributed PV power stations will cause power fluctuations in the power grid. Since energy storage systems can facilitate load and frequency regulations， a joint optimal scheduling method for PV‒energy storage systems is proposed. Firstly， the optimal scheduling model of a PV‒energy storage system is constructed considering its economy and technical indicators， and the charging and discharging power of the energy storage modules are optimized with the aim of minimizing the variance of active power fluctuations. Secondly， a real-time scheduling strategy based on predicted PV outputs is proposed to improve the orderly grid-connection of distributed PV‒energy storage systems， which can smooth the load fluctuation of the grid and reduce load‒valley difference. Finally， a simulation study is designed and carried out to verify the feasibility of the method.

Key words: distributed photovoltaic, energy storage module, output characteristic, joint optimization, scheduling strategy, renewable energy

CLC Number:

TK01

DONG Qiang, XU Jun, FANG Dongping, FANG Lijuan, CHEN Yanqiong. Optimal scheduling strategy of distributed PV‒energy storage systems based on PV output characteristics[J]. Integrated Intelligent Energy, 2024, 46(4): 17-23.

Figures/Tables 9

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优化调度前后	总共享储能容量/（kW·h）	总运行成本/万元	弃光率/%	平均峰谷差率/%
优化前	9 254.63	2.01	19.0	49.64
优化后	11 928.54	1.60	0.6	36.75