储能电池系统对地电压电流特征及影响因素分析
Analysis of Voltage and Current Characteristics and Influencing Factors of Energy Storage Battery System to Ground
苏家明 1渠展展 1陈浩 1惠东1
作者信息
- 1. 中国电力科学研究院有限公司,北京市 海淀区 100192
- 折叠
摘要
电池系统外壳或机架采用直接接地设计并且存在寄生电容,导致电池系统正负极对地存在共模电压和共模电流效应,共模电压与电流问题成为影响电池系统绝缘的关键因素.该文在现有储能系统集成架构基础上,开展电池系统共模电压和共模电流问题研究,建立适用于储能系统的二阶共模等效电路模型,量化分析电池系统共模电压和共模电流特征以及在寄生电容、开关频率等因素影响下的变化规律,仿真与实验结果表明,共模电压和共模电流问题是影响电池系统对地电气特征的主要因素,为系统优化设计提供了技术支撑.
Abstract
The shell or frame of the battery system is directly grounded and there are parasitic capacitors,which leads to the common mode voltage and current effect of the positive and negative terminals of the battery system on the ground.The common mode voltage and current problems become the main factors affecting the insulation of the battery system.Based on the existing integrated architecture of energy storage system,common mode voltage and current of battery system are studied in this paper,and a second-order common mode equivalent circuit model suitable for energy storage system is established.Quantify the characteristics of common mode voltage and current of the battery system and the change rule under the influence of parasitic capacitance,switching frequency,and other factors.The simulation and experimental results show that the common mode voltage and current are the main factors affecting the electrical characteristics of the battery system to the ground,which provides technical support for the optimal design of the system.
关键词
储能电池系统/共模电压/共模等效模型/寄生电容/极地电压Key words
battery energy storage system/common mode voltage/common mode equivalent model/parasitic capacitance/polar voltage引用本文复制引用
基金项目
国家电网有限公司科技项目(DG71-21-004)
出版年
2024
国家科技期刊平台
NSTL
万方数据