Impact and countermeasure of three-phase unbalanced operation for low voltage distribution systems
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Abstract:
Most of Chinese low-voltage distribution systems use three-phase four-wire Y/Yno(Y/Y) connection mode.The transformer unbalanced operation state is often caused by single-phase loads.The three-phase voltage imbalance and its impact to power quality are analyzed in this paper.Distribution transformer losses and line losses caused by the imbalance are investigated in detail.Some managing and technical countermeasures for the imbalance are also proposed.
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林志雄,陈岩,蔡金锭,李天友.低压配电网三相不平衡运行的影响及治理措施[J].电力科学与技术学报英文版,2009,24(3):63-67. Impact and countermeasure of three-phase unbalanced operation for low voltage distribution systems[J]. Journal of Electric Power Science and Technology,2009,24(3):63-67.