Research on key technologies of AC-to-DC transmission lines conversion

被引：0
|
作者：
Xu Z. [1 ]
Xu F. [2 ]
机构：
[1] College of Electric Engineering, Zhejiang University, Hangzhou
[2] State Grid Zhejiang Electric Power Research Institute, Hangzhou
来源：
Xu, Zheng (xuzheng007@zju.edu.cn) | 1600年 / Science Press卷 / 42期
关键词：
Cable line conversion; Multiple line conversion; Overhead line conversion; Square wave AC structure; Three-wire bipole structure; Tripole structure;
D O I：
10.13336/j.1003-6520.hve.2016.01.001
中图分类号：
学科分类号：
摘要：
Compared to the existing strategies of AC transmission line expanding conversion, the strategy of conversion AC transmission lines to DC transmission lines (AC-to-DC transmission lines conversion) can update the transmission capacity of the existing line to the maximum, which has good application prospect. We discuss the AC-to-DC lines conversion technique from three aspects, that is, the overhead line conversion, the cable line conversion, and multiple line conversion. For the overhead line conversion, several aspects about the operation characteristic, the topology structure, the transmission capacity, etc. of the tripole structure based HVDC (TPS-HVDC) and the three-wire bipole structure based HVDC (TWBS-HVDC) are described generally. In terms of the cable line conversion, the symmetric and asymmetric modulation methods are proposed, and two feasible topology structures are presented, which are the tripole type square wave AC (TPT-SWAC) and the three-phase bipole type SWAC (TPBT-SWAC). And for the variable resistor in the TPBT-SWAC, its resistance distribution scheme is studied and a general formula for resistance calculation is obtained. For the multiple line conversion, the multi-terminal HVDC structures based on TPS and TPT-SWAC or TWBS and TPBT-SWAC which are constructed from multiple lines are depicted. According to analysis, TWBS and TPBT-SWAC are more suitable for the multi-terminal HVDC than TPS and TPT-SWAC. The key technology for AC-to-DC lines conversion is analyzed from different aspects and different levels. The research and analysis results indicate that the existing and new proposed topologies play a role in promoting the study of AC-to-DC lines conversion, which can provide wider technical ideas for the conversion and promote innovation and development in this field. © 2016, High Voltage Engineering Editorial Department of CEPI. All right reserved.
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页码：1 / 10
页数：9
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