三极直流输电技术特性及协调控制方式

发布时间：2018-06-06 03:06

本文选题：三极直流输电 + 交流直流转换　；参考：《高电压技术》2014年02期

【摘要】：为较大程度提升现有交流线路的输电容量,以缓解输电网输电能力欠缺,潮流拥塞等问题,引入一种交流线路改造成直流线路的技术方案—三极直流。三极直流能够提高线路的传输容量,具有较高的内在冗余度和过负荷能力,并可充分借鉴已有工程的经验,应用前景值得期待。该文介绍了三极直流输电的基本运行原理,总结了其技术和应用上的特点和优势,同时根据不对称电流调节策略,从时序控制、极控制和接地极电流平衡控制3方面提出了三极直流输电特有的协调控制策略。仿真结果表明,所提出的协调控制策略能够使得转换期间直流系统功率传输保持稳定,接地极电流波动控制在较小范围内,有利于交直流系统长期稳定运行。
[Abstract]:In order to increase the transmission capacity of the existing AC lines to a large extent, and to alleviate the problems such as the lack of transmission capacity and the congestion of the power flow in the transmission network, this paper introduces a technical scheme of transforming AC lines into DC lines, which is called three-pole direct current (TDC). The three-pole DC can improve the transmission capacity of the transmission line, have higher inherent redundancy and overload capacity, and can fully use for reference the experience of existing projects. The application prospect is worth looking forward to. This paper introduces the basic operation principle of three-pole direct current transmission, summarizes the characteristics and advantages of its technology and application, at the same time, according to the strategy of asymmetric current regulation, from the time sequence control, The special coordinated control strategy of three-pole direct current transmission is proposed in three aspects of pole control and earth-pole current balance control. The simulation results show that the proposed coordinated control strategy can make the DC system power transmission stable during the conversion period, and the earth pole current fluctuation is controlled in a small range, which is conducive to the long-term stable operation of the AC / DC system.
【作者单位】：浙江大学电气工程学院;
【基金】：国家高技术研究发展计划(863计划)(2012AA050205)~~
【分类号】：TM721.1

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