基于直流母线电压带的光伏-充电桩-建筑微电网控制  

Control of PV-EV charger-building microgrid based on DC bus voltage band

作　　者：梁博远 刘效辰 刘晓华[1] 张涛[1] 王骅 李志江 刘加根 LIANG Boyuan;LIU Xiaochen;LIU Xiaohua;ZHANG Tao;WANG Hua;LI Zhijiang;LIU Jiagen(Department of Building Science,Tsinghua University,Beijing 100084,China;China National Real Estate Development Group Co.,Ltd.,Beijing 100037,China;Architectural Design and Research Institute of Tsinghua University Co.,Ltd.,Beijing 100084,China)

机构地区：[1]清华大学建筑技术科学系,北京100084 [2]中国房地产开发集团有限公司,北京100037 [3]清华大学建筑设计研究院有限公司,北京100084

出　　处：《供用电》2025年第1期3-12,共10页Distribution & Utilization

基　　金：国家重点研发计划项目(2023YFC3807002);中国交通建设集团股份有限公司科技重点研发项目(RP2023032050);中国科协青年人才托举工程(2023QNRC001)。

摘　　要：面向“双碳”目标,建筑是发展分布式光伏与电动汽车有序充电的重要场景。大量光伏与充电桩接入建筑配电系统,给城市低压配电网带来了巨大的增容压力。为此,提出了一种面向城市更新需求的建筑直流微电网控制方法。将柔性直流充电桩与分布式光伏连接组成直流微电网,通过充电桩功率主动调节优先消纳光伏,再将直流微电网接入建筑交流配电系统,实现与电网友好的交直流系统能量互济。该系统采用基于直流母线电压带的分散式控制方法,各变换器独立检测直流母线电压从而决定运行模式。最后通过模拟仿真验证了该方法在暂态以及全年运行中的有效性。该方法可在不额外增加建筑配电系统容量和储能设备的条件下,保障车辆充电需求并提高分布式光伏消纳率。Towards the"Carbon Peaking and Carbon Neutrality Goals",building is an ideal place for distributed photovoltaics(PV)integration and orderly charging of electric vehicles(EV).A large-scale integration of PV and EV chargers into building power distribution systems has posed increasing pressure on the hosting capacity of urban low-voltage distribution network.Therefore a control method of building DC microgrid for the purpose of urban renewal is proposed.Flexible DC(direct current)chargers and distributed PVs are integrated to a DC microgrid,where the power of the chargers is actively adjusted to prioritize PV self-consumption.The DC microgrid is then connected to the AC(alternating current)power distribution system of a building to achieve grid-friendly energy mutual aid between the AC and DC systems.This DC microgrid adopts a decentralized control method based on a DC bus voltage band,by which each converter in the microgrid independently detects the DC bus voltage to determine its operating mode.The effectiveness of this control method in transient state and year-round operation is verified by simulation.This control method is demonstrated to ensure the EVs'charging demand and increase the self-consumption rate of distributed PV without increasing the capacities of building power distribution systems and stationary energy storages.

关 键 词：直流微电网 直流母线电压带 分布式光伏 充电桩 分散式控制 

分 类 号：TM72[电气工程—电力系统及自动化]