特高压直流输电系统接入受端系统方式对比研究分析

Comparison Analysis on Mode of UHVDC Transmission System Access to Receiving End System

详细阐述了特高压直流受端单层接入、分层接入和分极分层接入方式的拓扑结构及其特点。在单层接入和分层接入方式控制系统结构的基础上提出了分极分层接入方式的控制系统结构。从多馈入短路比、故障特性和受端交流系统的接纳能力等方面对3种不同的结构方式进行了对比研究,得出分层接入和分极分层接入能有效提高多馈入短路比和受端交流系统的接纳能力;相较于单层接入方式、分层接入方式和分极分层接入方式具有更好的故障恢复特性和更强的受端交流系统接纳能力。

The topology structures and characteristics of UHVDC single -layer connection mode, hierarchical connection mode and pole hierarchical connection mode are described in detail. Based on control system of UHVDC pole hierarchical connection mode and UHVDC hierarchical connection mode, the control system structure of UHVDC p01e hierarchical connection mode is proposed. The three kinds of UHVDC connection modes are compared from the multi - infeed short circuit ratio （ MISCR）, fault features and acceptance ability of AC system in receiving end. It is obtained that UHVDC hierarchical connection mode and UHVDC pole hierarchical connection mode can effectively improve MISCR and the acceptance ability of AC system in re- ceiving end. Compared with UHVDC single - layer connection mode, UHVDC hierarchical connection mode and UHVDC pole hierarchical connection mode have better recovery characteristics and stronger acceptance ability of AC system in receiving end.