郑州特高压换流站户内直流场新型紧急融冰接线方案

A New Emergency Ice-melting Electrical Scheme for Indoor DC Field in Zhengzhou UHVDC Converter Station

以郑州特高压换流站为研究对象,借鉴户外直流场的紧急融冰接线原理,根据户内直流场的特殊性,提出适用于换流站户内直流场的2种新型融冰接线形式,并对其进行了经济、技术比较。最后,按照推荐的电气接线形式给出了新型户内直流场电气平面布置方案,并分析这种布置方案在紧急融冰时的运行方式和独特优点。研究结论可为特高压换流站户内直流场设计提供参考。

Taking Zhengzhou UHVDC converter station as the research object, two new ice-melting connection schemes were suggested for the indoor DC field of converter station, whose economic and technical features were also compared, based on the principle of outdoor emergency ice-melting connection and the particularity of indoor DC field. According to the recommended electrical connection form, the corresponding new electrical layout scheme of indoor DC field was proposed. Finally, the operation mode of emergency ice-melting and its superiority were analyzed. The research results can be references for the design of UHVDC indoor field in UHVDC converter stations.