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Study on Comparisons Among Some Waveform Symmetry Principle Based Transformer Differential Protection
Author(s): 
Pages: 44-49,70
Year: Issue:  4
Journal: TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY

Keyword:  变压器差动保护励磁涌流波形对称法;
Abstract: 讨论了几种波形对称法变压器差动保护的原理和实现形状,分析了各自的可靠性和灵敏度,结果表明,与二次谐波原理相比,现有的波形对称原理能在涌流和故障并存的情况下分相动作,但在故障电流波形畸变严重的情况下,动作速度依然不够理想,在(超)高压大型变压器保护中的应用还有待进一步改进和完善.
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