基于多端VSC技术的一种交直流混合配电网网络结构

doi:10.3969/j.issn.1000－7229.2016.12.006

摘要/Abstract

摘要： 分布式电源的快速发展和配电网负荷的变化使得传统辐射型交流配电网面临诸多问题。该文利用多端电压源换流器（voltage source converter，VSC）技术，通过在交流配电网中增加直流环节来构建交流直流混合配电网，提出了交直流混合配电网的网络结构，并对其控制策略进行了理论分析，最后利用Matlab/Simulink搭建仿真模型对其网络结构和控制策略进行了仿真验证。仿真结果表明，通过对换流器进行合理控制，能够有效改善原有交流配电线路的电压分布和负荷承载能力，并且能够对系统潮流进行灵活控制，实现对系统能源的合理分配。另外，交直流混合配电网中的直流环节可以作为未来直流配电网的一部分，从而使传统交流配电网可以平缓过渡到未来可能全面建设的直流配电网。

关键词: 多端电压源换流器（VSC）, 交直流混合配电网, 网络结构, 控制策略

Abstract: With the rapid development of distributed generation and changes of loads, traditional radical AC distribution network is confronted with many problems. With the technology of multiterminal VSCs (voltage source converters), this paper builds the AC/DC hybrid distribution network through adding DC-link to AC distribution network, proposes the network structure of AC/DC hybrid distribution network and theoretically analyzes its control strategy. Finally, this paper constructs the simulation model by Matlab/Simulink to simulate and verify the network structure and control strategy. The simulation results show that through the rational control of VSCs, the voltage distribution and load carrying capacity of existed AC distribution lines can be improved effectively, and the power flow can be controlled flexibly, therefore, the resources can be allocated appropriately. Moreover, the DC-link of AC/DC hybrid distribution network can be a part of future DC distribution network so that the distribution network can be transitioned smoothly from traditional AC to DC.

Key words: multiterminal VSC, AC/DC hybrid distribution network, network structure, control strategy

中图分类号:

TM 727

严逍，焦彦军，杜哲. 基于多端VSC技术的一种交直流混合配电网网络结构[J]. 电力建设, 2016, 37(12): 48-.

YAN Xiao, JIAO Yanjun, DU Zhe. An AC/DC Hybrid Distribution Network Structure Based on Multiterminal VSC[J]. Electric Power Construction, 2016, 37(12): 48-.

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