基于分散PV-BES协调架构的孤岛直流微网电压控制  

Isolated DC Microgrid Voltage Control Based on Decentralized PV-BES Coordination Architecture

作　　者：马红明 耿泉峰 霍雨佳 王朔 MA Hongming;GENG Quanfeng;HUO Yujia;WANG Shuo(State Grid Hebei Marketing Service Center,Shijiazhuang 050000,Hebei,China;College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310023,Zhejiang,China)

机构地区：[1]国网河北省电力有限公司营销服务中心,河北石家庄050000 [2]浙江工业大学机械工程学院,浙江杭州310023

出　　处：《电气传动》2021年第21期46-52,58,共8页Electric Drive

基　　金：国家自然科学基金资助项目(51807118)。

摘　　要：提出了一种用于即插即用微网的分散光伏-电池储能(PV-BES)协调控制方法。当电池储能单元因荷电状态(SOC)限制或充放电功率限制而达到饱和状态时,光伏发电单元可以在直流母线电压控制下运行。模式转换和功率共享基于一种无通信的方式。通过绕过通信,微网(MG)系统可以变得更加灵活可靠。所设计的控制系统分别包含光伏变换器和BES变换器的控制器。PV变换器控制器可以实现最大功率点跟踪控制和下垂控制之间的无缝模式转换。BES变换器控制器具有高通滤波器路径解耦的特性,在发电主导模式下可改善MG动态性能。BES高通滤波补偿克服了PV主导模式下动态性能差的问题,使系统对PV参数变化具有更强的抵抗能力。最后,仿真和实验结果验证了这一方法的有效性。A decentralized photovoltaic-battery energy storage(PV-BES)coordination control method for plug-n-play DC microgrid was proposed.With proposed control method,PV units can operate under DC bus voltage control when BES units are saturated due to SOC limit or charging/discharging power limit.The mode transition and power sharing are based on a communication-less manner.By bypassing communication,the microgrid(MG)system can become more flexible and reliable.The proposed control system contains controllers for PV converter and BES converter,respectively.The PV converter controller can achieve seamless mode transition between MPPT control and droop control.BES converter controller has a decoupled feature that a high-pass-filter(HPF)path could improve MG dynamic performance under generation-dominating mode.The BES HPF compensation overcomes the issue of poor dynamic performance under PV-dominating mode and makes the system more resistive to PV parameter variation.Simulation and experimental results have been provided to verify the concept and analytical study.

关 键 词：直流微电网 模块化微电网 分散控制 下垂控制 

分 类 号：TM28[一般工业技术—材料科学与工程]