Research on Evaluation Method of SoE Operation Region for Energy Storage Lithium Battery Module

doi:10.12096/j.2096-4528.pgt.19112

Abstract

Abstract:

The state of energy(SoE) operation region of energy storage lithium battery module was studied in order to improve the control precision and ensure the efficient and stable operation of the battery energy storage system. Base on the analysis of the simulated operating condition of tracking power generation schedule and wind-PV power stabilization, as well as the evaluation indicators, such as range and coefficient of standard deviation of battery voltage, the evaluation method of the SoE operation region for the energy storage lithium battery module was put forward. The actual energy storage lithium battery module was tested in the simulation experiment of tracking power generation schedule and wind-PV power stabilization. The SOE operation range of the lithium battery module under the two operating conditions was determined by analyzing the variation of the battery voltage range and the standard deviation coefficient of the battery voltage. The result show that the SoE operation region of the energy storage lithium battery module can be confirmed effectively according to the range and coefficient of standard deviation of battery voltage in the simulated operation experiment. It provides technical means for the energy utilization improvement of energy storage unit, and it has guiding significance to ensure the lithium BESS running efficiency and stability.

Key words: energy storage, lithium battery module, state of energy, tracking power generation schedule, wind-PV power stabilization, range of battery voltage, coefficient of standard deviation of battery voltage

Hao CHEN,Huaxin ZHAI,Kairang WANG,Junfeng YANG,Yu GONG. Research on Evaluation Method of SoE Operation Region for Energy Storage Lithium Battery Module[J]. Power Generation Technology, 2019, 40(6): 587-597.

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