摘要
【目的】现有关于分散式协同控制策略的研究主要针对直流微电网内部的功率分配展开,而较少考虑直流微电网并网运行的情况。对此,提出一种计及荷电状态(state of charge,SOC)的并网型直流微电网功率协同控制策略。【方法】所提策略将互联变换器视作一个可调度的资源,基于直流母线电压调节储能单元和互联变换器的输出功率,并限制母线电压和储能单元SOC在允许范围内。【结果】根据Simulink仿真结果,所提策略能够实现储能单元和互联变换器之间的分散式功率协同和储能单元之间的SOC均衡,并避免电压越限和储能单元过充过放的情况出现。【结论】所提控制策略能够在并网型直流微电网内实现合理的功率分配,保证系统的稳定运行。
[Objectives]Existing research on decentralized coordinated control strategies mainly focuses on power distribution within DC microgrid,with limited consideration given to the operation of grid-connected DC microgrids.To address this,a power coordinated control strategy for grid-connected DC microgrids,considering the state of charge(SOC),is proposed.[Methods]The proposed strategy treats the interconnecting converter as a dispatchable resource.It regulates the output power of the energy storage unit and interconnecting converter based on the DC bus voltage while keeping the bus voltage and SOC of the energy storage unit within allowable limits.[Results]The proposed strategy can achieve decentralized power coordination between the energy storage unit and the interconnecting converter,as well as SOC balancing among energy storage units.It also prevents overvoltage and overcharge/overdischarge conditions for the energy storage units.[Conclusions]The proposed control strategy ensures reasonable power distribution in grid-connected DC microgrids and guarantees the stable operation of the system.
作者
卫广宇
应笑冬
姚延军
杨小芳
翁楚迪
彭勇刚
李海龙
WEI Guangyu;YING Xiaodong;YAO Yanjun;YANG Xiaofang;WENG Chudi;PENG Yonggang;LI Hailong(Ningbo Economic-Technological Development Area Beilun Electric Power Industry Co.,Ltd.,Ningbo 315825,Zhejiang Province,China;School of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang Province,China)
出处
《发电技术》
2025年第4期788-796,共9页
Power Generation Technology
基金
国家自然科学基金项目(51877188)
宁波永耀电力投资集团有限公司科技项目(KJXM2022023)。
