中国电力 ›› 2017, Vol. 50 ›› Issue (12): 38-43.DOI: 10.11930/j.issn.1004-9649.201711231

• 大型调相机专栏 • 上一篇    下一篇

大型调相机惰速同期并网可靠性研究

曾先锋, 侯炜, 陈俊   

  1. 南京南瑞继保电气有限公司,江苏 南京 211102
  • 收稿日期:2017-02-27 出版日期:2017-12-20 发布日期:2018-01-30
  • 作者简介:曾先锋(1987—),男,湖北孝感人,硕士,工程师,从事电力系统自动化、电气二次设备微机保护的研发工作。E-mail:zengxf@nrec.com
  • 基金资助:
    国家电网公司科技项目(上海庙—临沂±800 kV特高压项目山东临沂换流站调相工程)

Reliability Research on Idle Speed Synchronization of Large Condenser

ZENG Xianfeng, HOU Wei, CHEN Jun   

  1. NR Electric Co., Ltd., Nanjing 211102, China
  • Received:2017-02-27 Online:2017-12-20 Published:2018-01-30
  • Supported by:
    This work is supported by Science and Technology Project of State Grid Corporation of China.

摘要: 静止变频器(SFC)输出侧不配升压变可减少加装调相机的整体成本,但并网前SFC退出后调相机转子转速将不再可控,同期条件差。为提高惰速同期并网可靠性,首先建立了冲击电流与频差和角差间的关系,其次对同期点存在概率进行了研究,然后提出了在正频差时选择滞后系统的一个小角度、负频差时选择超前系统的一个小角度并网,正频差允许值设定较小、负频差允许值设定较大等提高并网可靠性的方法。结合算例,对调相机惰速运行中不同惰速率和不同允许频差下的同期点存在概率进行了计算分析,验证了所提方法可有效减小并网冲击电流,增加同期点存在概率,提高并网可靠性。

关键词: 调相机, 静止变频器, 惰性降速, 同期, 并网

Abstract: The output side of the static frequency converter (SFC) which is not equipped with step-up transformer can reduce the overall cost of installing the condenser, but then the conditions of grid connection will become harsh when the rotor speed is no longer controllable. In order to improve the grid-connected reliability of synchronization, firstly the relationship is established between the inrush current, frequency difference and angular difference, secondly the existence probability of synchronous point are researched on, then some suggestions that select a small lag angle in the positive frequency difference, a small advanced angle in the negative frequency difference and so on are put forward to improve the reliability of synchronization. Based on the example, the existence probabilities and permissible frequency differences are studied that verify the proposed methods can effectively improve the reliability of synchronization.

Key words: condenser, static frequency converter, idle speed, synchronization, grid connection

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