摘要
金沙江一期直流外送工程每个直流系统额定功率高达6400MW,具有主接线复杂、输电距离长、可靠性要求高的特点。在送端,向家坝和溪洛渡左、右岸3个换流站相互之间联系紧密,任何一个直流系统故障都将会对其他直流系统乃至整个送端电网产生影响。对于受端电网,特高压直流系统输送的6400MW是一个很大的受电功率,即使失去直流单极,也会对电网产生不小的冲击。对于特高压直流系统,可靠性是一个不容忽视的问题。根据我国现有直流输电系统的运行经验和故障次数、可靠性数据的统计结果,分析我国已投入运行的高压直流输电系统故障设备及故障次数占比,并结合特高压直流输电系统的主接线形式和技术特点,分析并提出了特高压直流输电系统合理的可靠性指标。
Each UHVDC system of Jinsha fiver first stage project will reach 6 400 MW and has characteristics of complicated main circuit arrangement, long transmission distance and high reliability requirement. At the sending end, 3 converter stations, i.e. Xiangjiaba, Xiluodu ]eft and Xiluodu right converter stations, have much tight connection among each other. If any UHVDC system fails, the remained other 2 UHVDC systems, even the whole sending end network, will be affected. As for the receiving end, 6 400 MW capacity is such a bulk power that an un-ignorable impact will be imposed on the network even with only half of the power loss. So the reliability of a UHVDC system is of most important degree. In this paper, an analysis of failure equipment and efficiency rate was performed based on historical operating experiences and fault times of existing HVDC systems in china. Reasonable reliability index was proposed through an analysis combined with main circuit arrangement as well as technical characteristics of a UHVDC system.
出处
《中国电力》
CSCD
北大核心
2007年第12期14-18,共5页
Electric Power
作者简介
马为民（1966-），男，湖北武汉人，博士后，从事直流工程系统设计和咨询工作．E-mail： weimin-ma@sgcc.com.cn
