• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2017, Vol. 38 ›› Issue (8): 42-.doi: 10.3969/j.issn.1000-7229.2017.08.006

• 设备开发与配置技术 • 上一篇    下一篇

 基于多直流功率支援的直流偏磁治理策略

 龙兵1, 刘元琦2, 汤怀收3, 何英发4,谢志成4

 
  

  1. 1. 国网湖北省电力公司秭归县供电公司,湖北省宜昌市 443600分号
    2. 国网吉林省电力有限公司,长春市 130021;3. 西安交通大学,西安市 710049分号
    4.强电磁工程与新技术国家重点实验室(华中科技大学),武汉市 430074
  • 出版日期:2017-08-01
  • 作者简介:龙兵(1975),男,学士,工程师,主要从事电网运维检修技术及运行管理方面的研究工作分号 刘元琦(1972),男,学士,高级工程师,主要从事电力自动化技术及电网运行管理方面的研究工作分号 汤怀收(1978),男,硕士,工程师,主要从事电气线路测控技术方面的研究工作分号 何英发(1992),男,硕士研究生,本文通信作者,主要从事直流系统保护与控制方面的研究工作; 谢志成(1990),男,博士研究生,主要从事直流系统保护与控制方面的研究工作。
  • 基金资助:
     国家自然科学基金项目(51477090)

 Suppression Method of DC Magnetic Bias Based on Multi-DC Power Support
 

 LONG Bing1, LIU Yuanqi2, TANG Huaishou3, HE Yingfa4, XIE Zhicheng4

 
  

  1. 1. State Grid Hubei Electric Power Company Zigui Power Supply Company, Yichang 443600, Hubei Province,  China; 
    2.Jilin Electric Power Company, Changchun 130021, China; 3. Xi'an Jiaotong University, Xi'an 710049, China;4. State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and  Technology), Wuhan 430074, China
     
  • Online:2017-08-01
  • Supported by:
    Project supported by National Natural Science Foundation of China(51477090)
     

摘要:  摘要:现有的直流偏磁治理均是从抑制设备的研发层面着手,无法实现从根源上治理直流偏磁。该文提出了一种基于多直流功率支援的直流偏磁抑制方法。首先在PSCAD/EMTDC平台上搭建了宜昌电网变压器中性点直流电流分布仿真模型,根据同一输电断面内多条直流输电线路可进行功率支援的特点,提出主动降低处于单极-大地运行方式的直流线路的输送功率,由同一输电断面中其他直流线路承担相应输送功率缺额,主动制造反向不平衡入地电流以中和单极-大地回线中的直流电流,以此降低交流电网中变压器中性点直流电流的幅值。最后,采用遗传算法对送端机组出力进行优化,并借助PSASP平台对功率转移后送端电网的静态稳定性及暂态稳定性进行了校验。

 

关键词: 直流偏磁治理, 功率转移, 出力优化, 静态稳定性, 暂态稳定性

Abstract:  ABSTRACT: The conventional research of suppressing DC magnetic bias mainly focus on the development of DC magnetic bias blocking device, which cannot solve the DC magnetic bias fundamentally. This paper proposes a suppression method of DC magnetic bias based on multi-DC power support. Firstly, based on PSCAD/EMTDC, we establish a DC current distribution simulation model of transformer neutral point in Yichang power grid. Secondly, from the perspective of coordination running and power support between DC lines in the same transmission section, the transmission power of HVDC is reducd, which is operating in monopole-ground return mode, and the reduction of transmission power will be transferred by other HVDC projects in the same transmission section, to actively generate reverse unbalanced grounding current to neutralize the DC current in monopole-ground return line, which can reduce the amplitude of DC current at transformer neutral point in AC grid. Finally, the generation output of sending-end unit is optimized by genetic algorithm and then the static and transient stability of the sending-end grid after power transfer are verified based on PSASP simulation system.

 

Key words: suppression of DC magnetic bias, power transfer, generation output optimization, static stability, transient stability

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