光伏发电直流接入与消纳的方案设计和工程实践

随着柔性直流技术的发展,配电网领域源-网-荷的构建方式更加丰富,可实现集中式光伏直流并网、数据中心直流供电等新型电网模式。依托张北交直流配电网及柔性变电站示范工程,介绍光伏发电站直流并网方案以及工程实施途径,同时,设计了数据中心直流供电的接线方式,计算了供电可靠性。在此基础上,对比直流配电网和传统交流配电网,从电能传输效率、供电可靠性、电能质量等方面体现了直流配电网的优势。示范工程实现了光伏发电直流接入与消纳,设计成果和实践经验可为同类工程提供参考。

Scheme Design and Engineering Implementation of DC Grid-Connection and Accommodation of Photovoltaic Power

With the development of flexible DC technology, the construction of source-grid -load in distribution network is greatly enriched, and the new-type grid models become possible such as centralized photovoltaic DC grid-connection and DC power supply for data centers. Based on Zhangbei AC & DC distribution network and flexible substation demonstration project, the paper introduces the DC grid-connection scheme for photovoltaic power station and the way of engineering implementation. In the meantime, the connection of DC power supply system is designed for data center and the reliability of power supply is calculated. Compared with the traditional AC distribution network, the advantages of DC distribution network are demonstrated in view of power transmission efficiency, power supply reliability and power quality. The demonstration project has realized the DC integration and accommodation of photovoltaic power generation, and the design results and practical experience can provide a reference for similar projects.