提高变压器严重故障时差动保护动作速度的方法

余荣云<sup>1</sup>; 余高旺<sup>2</sup>; 张丽青<sup>3</sup>; 杨恢宏<sup>2</sup>

引用本文:	余荣云,余高旺,张丽青,等.提高变压器严重故障时差动保护动作速度的方法[J].电力系统保护与控制,2008,36(2):13-15.
	YU Rong-yun,YU Gao-wang,ZHANG Li-qing,et al.Improving operation speed of differential protection for transformer at serious interior fault[J].Power System Protection and Control,2008,36(2):13-15

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提高变压器严重故障时差动保护动作速度的方法
余荣云¹, 余高旺², 张丽青³, 杨恢宏
1.江苏省电力公司，江苏南京 210026;2.许继电气技术中心,河南许昌 461000;3.许昌市供电公司,河南许昌 461000

摘要:

分析了变压器比率差动保护动作速度慢的原因和差流速断保护在应用中遇到的问题，根据故障时差动保护中动作电流与制动电流的比值关系，提出了增加快速动作区的解决差动保护快速动作的方案，并通过数模验证了该方案能够有效提高差动保护在区内严重故障的动作速度。

关键词: 变压器差动保护动作速度

DOI：10.7667/j.issn.1674-3415.2008.02.004

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基金项目:

Improving operation speed of differential protection for transformer at serious interior fault

YU Rong-yun¹, YU Gao-wang², ZHANG Li-qing³, YANG Hui-hong

1.Jiangsu Electric Power Corporation ,Nanjing 210026,China;2. Technology Center of XJ Group Company ,Xuchang 461000,China;3.Xuchang Power Supply Company, Xuchang 461000, China

Abstract:

By analyzing the cause of operation time of differential protection and the problem of over-current protection in application, a solution is proposed by adding the fast operation zone to improve the operation speed of transformer differential protection according to the relationship between differential current and restraint current. The numerical simulation results verify that this solution can effectively shorten the operation time of differential protection while the serious internal faults occurring.

Key words: transformer differential protection operation speed

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