引用本文:陈庆涛,田宇,丁国成,等.基于灵敏度分析的直流输电接地极优化选址方法研究[J].电力系统保护与控制,2018,46(21):125-130.
CHEN Qingtao,TIAN Yu,DING Guocheng,et al.Optimization method of grounding pole location for HVDC transmission system based on sensitivity analysis[J].Power System Protection and Control,2018,46(21):125-130
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基于灵敏度分析的直流输电接地极优化选址方法研究
陈庆涛1,田 宇1,丁国成2,吴兴旺2,刘 勇3,吴伟丽4
(1.国网安徽省电力公司，安徽 合肥 230088;2.国网安徽省电力公司电力科学研究院，安徽 合肥 230088; 3.安徽正广电电力技术有限公司，安徽 合肥 230088;4. 伊犁师范学院电信分院，新疆 伊宁 833200)
摘要:
为了最大程度避免直流输电工程单极大地运行方式造成的变压器直流偏磁问题，提出了一种直流输电接地极的优化选址方法。研究了直流接地极选址时需要考虑的大地电性参数、电力规划需求、周边交流电网的结构与参数等因素，建立了直流接地极位置与变压器直流偏磁风险之间的关联度模型。对此模型进行了灵敏度分析，并以此为依据，提出了高压直流输电接地极选址优化方法。以一个交直流混联电网为例研究了优化选址的效果。优化方法对避免交流电网变压器直流偏磁风险有理论参考作用。
关键词:  直流输电  接地极  选址  灵敏度  优化
DOI：10.7667/PSPC171452
分类号:
基金项目:国网安徽省电力公司科技项目资助“大型电力变压器直流偏磁危害研究及仿真建模”;新疆维吾尔自治区自然科学基金项目资助(2017D01C417)
Optimization method of grounding pole location for HVDC transmission system based on sensitivity analysis
CHEN Qingtao1,TIAN Yu1,DING Guocheng2,WU Xingwang2,LIU Yong3,WU Weili4
(1. State Grid Anhui Electric Power Company, Hefei 230088, China;2. State Grid Anhui Electric Power Research Institute, Hefei 230088, China;3. Anhui ZGD Power Technology Co., Ltd., Hefei 230088, China;4. College of Telecommunication, Yili Normal University, Yining 833200, China)
Abstract:
In order to avoid the DC bias of transformer caused by HVDC project, a method for optimal location of HVDC grounding electrode is proposed. After studying the influence factors of the DC grounding location that should be considered, such as the earth electrical parameters, power planning requirements, structure and parameters of surrounding AC power network and so on, this paper establishes a correlation model between the DC grounding pole position and transformer DC bias risk. Secondly, it makes the sensitivity analysis and on this basis puts forward the HVDC grounding pole location optimization method. Finally, an AC/DC hybrid power grid is used as an example to verify the effect of the proposed method. The optimization method has theoretical reference for avoiding the DC bias risk of AC grid transformer. This work is supported by Science and Technology Project of State Grid Anhui Electric Power Company and Natural Science Foundation of Xinjiang Uygur Autonomous Region (No. 2017D01C417).
Key words:  DC transmission  grounding electrode  site selection  sensitivity  optimization
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