面向中压配电网直流代替交流的典型应用场景分析

Analysis of Typical Scenarios of DC Replacing AC in Medium Voltage Distribution Network

直流代替交流是解决传统交流配电网中负荷大、供电走廊紧张、分布式电源消纳困难的重要手段。直流具备相同走廊条件下输电容量大、新能源消纳比例高,以及可以有效改善配电线路末端低电压的优点。针对直流代替交流的优势,选定对应的应用场景,利用仿真软件Digsilent/Powerfactory搭建仿真模型,并对典型场景的仿真结果以及交直流的经济性进行了深入分析。结果表明,直流代替交流后,负荷节点处的电压等级得到明显提升,供电功率可以大幅提升,投资综合效益更优。

DC replacing AC is an important means to solve the problems of increased load,tight power supply corridor and distributed power consumption in traditional AC distribution network.DC has the advantages of large transmission capacity under the same corridor conditions,which is conducive to the absorption of distributed new energy,and can effectively improve the low voltage at the end of distribution lines.Therefore,this paper selected the corresponding application scenarios,and built the simulating model by the simulating software Digsilent/Power Factory,and deeply analyzed the simulating results of typical scenarios and the economy of AC and DC.As the results show,the voltage level at the load node is significantly improved after DC replaces AC,the power supply can be greatly increased,and the comprehensive investment benefit is better.