中国电力 ›› 2014, Vol. 47 ›› Issue (9): 112-117.DOI: 10.11930/j.issn.1004-9649.2014.9.112.5

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特高压有载调压变压器差动保护特性分析

李岩军1, 周春霞1, 肖远清2, 郭晓3   

  1. 1. 中国电力科学研究院,北京 100192;
    2. 北京四方继保自动化股份有限公司,北京 100085;
    3. 国电南京自动化股份有限公司,江苏 南京 210003
  • 收稿日期:2014-01-10 出版日期:2014-09-18 发布日期:2015-12-10
  • 作者简介:李岩军(1973—),男,山西沁县人,高级工程师,从事电力系统自动控制及微机继电保护的研究。E-mail: liyanjun@epri.sgcc.com.cn

Analysis of Differential Protection Characteristic for On-Load-Tap-Changer Transformer of UHV

LI Yan-jun1, ZHOU Chun-xia1, XIAO Yuan-qing2, GUO Xiao3   

  1. 1. China Electric Power Research Institute, Beijing 100192, China;
    2. Beijing Sifang Automation Co., Ltd., Beijing 100085, China;
    3. Guodiain Nanjing Automation Co., Ltd., Nanjing 210003, China
  • Received:2014-01-10 Online:2014-09-18 Published:2015-12-10

摘要: 为研究特高压有载调压变压器差动保护特性,从变压器差动保护基本特性、差流不平衡特性等方面进行了研究,指出常规调压变压器保护在特高压变压器有载调压过程中的动作风险。通过对差流不平衡特性影响因素深入分析,给出调压变压器差动保护额定电流选取建议。通过仿真试验得到了不同档位下差流分布情况,提出了有载调压过程中调压变压器差动保护整定策略,并通过仿真试验得到验证。

关键词: 调压变压器, 差动保护, 额定电流, 整定策略, 特高压, 仿真试验, 档位, 差流

Abstract: In order to investigate the differential protection characteristics for on-load-tap-changer transformers of UHV, the basic performances of differential transformer protection and its unbalanced differential current were studied, by which it is found that the conventional protection of on-load-tap-changer transformers may have a potential risk during the transformer tap adjustment. Through the further analysis of the influencing factors on the characteristics of unbalanced differential current, suggestions about the selection of rated current of differential protection for on-load-tap-changer transformers were proposed. In addition, the differential current distribution during the transformer tap adjustment is obtained by the simulation and the setting strategy is accordingly provided, which is also validated by the simulation.

Key words: voltage-regulating transformer, differential protection, rated current, setting strategy, UHV, simulation test, gear, differential current

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