光储直柔建筑直流配电系统变换器运行特性研究  

Research on operation characteristics of DC distribution system converters in PEDF system

作　　者：李少杰 刘晓华 关博文 张涛 LI Shaojie;LIU Xiaohua;GUAN Bowen;ZHANG Tao(Building Environment Research Center,Tsinghua University,Beijing 100084,China;School of Human Settlements and Civil Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]清华大学建筑学院建筑节能研究中心,北京100084 [2]西安交通大学人居环境与建筑工程学院,陕西西安710049

出　　处：《供用电》2025年第4期3-11,共9页Distribution & Utilization

基　　金：国家重点研发计划项目(2023YFC3807000)。

摘　　要：在“双碳”战略背景下,建筑光储直柔系统凭借其独特优势成为电力系统变革的关键驱动力。依托建筑实际运行数据与变换器效率动态分析,深入评估了光储直柔建筑直流配电系统中关键变换器的运行性能,并提出优化策略。研究发现,AC/DC变换器在供配电系统中的损耗尤为显著,占比高达69.3%。提出了面向实际运行性能的变换器综合运行效率评估方法,采用分段加权效率综合评估变换器在实际运行中不同负荷率区间的效率特征,精准定位30%的负荷段为效率瓶颈,损失占比达45.3%,通过此方法计算的加权综合效率与系统实际运行效率高度吻合。基于此分析,提出的AC/DC并联优化方案显著提升运行效率10.2%。进一步,系统配置充足储能可额外降低损耗约18.7%,为建筑能源系统的高效运行提供了科学依据与实践路径。Under the background of“dual-carbon”strategy,the PEDF(photovoltaics,energy storage,direct current and flexibility)system in buildings has become a key driving force for power system change by virtue of its unique advantages.This paper evaluates the performance of key converters in the DC power distribution system of a building based on actual operation data and dynamic analysis of converter efficiency,and proposes an optimization strategy.It is found that the AC/DC converter in the system power supply and distribution loss is particularly significant,accounting for as high as 69.3%.This paper proposes a comprehensive operational efficiency assessment method for converters oriented to actual operational performance,using segment-weighted efficiency to comprehensively assess the efficiency characteristics of converters at different load rate intervals in actual operation,and accurately locate the efficiency bottleneck in the 30%load section,with a loss of 45.3%,and the weighted comprehensive efficiency calculated by this method is also highly consistent with the actual operational efficiency of the system.Based on this analysis,the AC/DC parallel optimization scheme proposed in this paper significantly improves the operating efficiency by 10.2%.Further,the configuration of the system with sufficient energy storage can additionally reduce the loss by about 18.7%,which provides a scientific basis and a practical path for the efficient operation of the building energy system.

关 键 词：光储直柔系统 变换器 运行效率 加权综合效率 负荷率 AC/DC 

分 类 号：TM72[电气工程—电力系统及自动化] TU83[建筑科学—供热、供燃气、通风及空调工程]