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Chuangshu XIE. Design and Setting of Zero-sequence Current Differential Protection for Transformers in Nuclear Power Plants[J]. SOUTHERN ENERGY CONSTRUCTION, 2015, 2(4): 74-80. DOI: 10.16516/j.gedi.issn2095-8676.2015.04.013
Citation: Chuangshu XIE. Design and Setting of Zero-sequence Current Differential Protection for Transformers in Nuclear Power Plants[J]. SOUTHERN ENERGY CONSTRUCTION, 2015, 2(4): 74-80. DOI: 10.16516/j.gedi.issn2095-8676.2015.04.013

Design and Setting of Zero-sequence Current Differential Protection for Transformers in Nuclear Power Plants

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  • Received Date: November 04, 2015
  • 1 000 MW nuclear power unit's main transformer usually consists of three 500 kV single-phase transformers, single-phase ground fault is one of the main fault types, and zero-sequence current differential protection is the main protection against single-phase ground fault. Currently the protection principle for zero-sequence current differential protection device is mainly rate restraint differential protection, however, the differences still exists between technical details, the calculation methods for protection settings and the adaptabilities to the current transformer configuration are also different. In this paper, considering two different types of zero-sequence current differential protection principle, by analyzing the different situations they adopt to, it proposed a design of nuclear power plant main transformer's zero-sequence current differential protection and its protection setting calculation
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