直流微网储能端的多模式虚拟惯性控制研究
Research on multi-mode virtual inertial control of DC microgrid energy storage
王华 1郁正纲 1王琛 2李寒兵 1孙涛 1白聪聪 3江国文 3张祥宇3
作者信息
- 1. 国网江苏省电力有限公司连云港供电分公司,江苏 连云港 222000
- 2. 国网江苏省电力有限公司连云港赣榆区供电分公司,江苏 连云港 222000
- 3. 华北电力大学 新能源电力系统国家重点实验室,河北 保定 071003
- 折叠
摘要
提升直流微网惯性是避免引入恒功率直流负载引发直流电压振荡的关键.考虑系统在不同电压变化率下对补充功率响应速率要求的差异,文章首先提出直流微网储能蓄电池端的多模式虚拟惯性控制策略,采用线性和指数两种模式以不同速率提供惯性功率,减小直流电压波动;其次,推导两种模式下的等效虚拟电容表达式,建立虚拟电容与电压调整间的动态关系;最后,搭建含储能的直流微网系统仿真模型,验证所提控制策略对直流电压稳定支撑的有效性.
Abstract
Enhancing the inertia of a direct current(DC)microgrid is a key issue to prevent the induction of DC voltage oscillations caused by the introduction of constant power DC loads.Considering the differences in the required supplementary power response rates under various voltage change rates,this paper first proposes a multi-mode virtual inertia control strategy for the energy storage battery terminals of the DC microgrid,using linear and exponential modes to provide inertia power at different rates,thereby reducing DC voltage fluctuations.Secondly,the equivalent virtual capacitance expressions for both modes are derived,establishing a dynamic relationship between the virtual capacitance and voltage adjustment.Finally,a simulation model of a DC microgrid system with energy storage is constructed to verify the effectiveness of the proposed control strategy in supporting DC voltage stability.
关键词
直流微网/蓄电池/虚拟惯性/虚拟电容Key words
DC microgrid/energy storage/virtual inertia/virtual capacitor引用本文复制引用
基金项目
中央高校基本科研业务费专项资金资助(2018MS90)
出版年
2024
国家科技期刊平台
NSTL
万方数据