基于柔性环网控制装置的交直流混合配电网接线模式研究

随着分布式电源、电动汽车等直流电源和直流负荷的大规模接入及用户对供电可靠性要求的提高,柔性直流技术在配电网中的应用越来越广泛。该文研究了含多端柔性环网控制装置的交直流混合配电网的典型网架结构;提出了传统交流配电网向交直流混合配电网的过渡目标、过渡原则、过渡过程,并给出了几种典型网架的过渡方式;最后,以三端柔性环网控制装置为例,通过对运行方式的划分,明确了含柔性环网控制装置的交直流混合配电网的运行方式及转换过程,为传统配电网向交直流混合配电网的升级提供理论依据。

Connection Modes of AC/DC Hybrid Distribution Network Based on Flexible DC Loop Network Controller

The flexible DC technology is applied more and more widely in distribution network with the large-scale access of DC power supply and DC load including distributed generation and electric vehicle and the improvement of the power supply reliability. This paper studies a typical network structure of AC/DC hybrid distribution network including multi-terminal flexible DC loop network controller, proposes the transition targets, principle and process of the traditional AC grid to AC/DC hybrid distribution network, and presents the transition way of several typical grid. Finally, the mode and conversion process of the AC/DC hybrid distribution network including flexible DC loop network controller are cleared through dividing the work modes in case of the three-terminal flexible DC loop network controller, which provides the theoretical basis for the upgrading of the traditional distribution network to the AC / DC hybrid distribution network.