| 引用本文: | 王明林,陈民铀,赖 伟,彭 林.一种改进的配电变压器短路电抗在线检测方法[J].电力自动化设备,2015,35(3): |
| WANG Minglin,CHEN Minyou,LAI Wei,PENG Lin.Improved method of online measuring for distribution transformer short circuit reactance[J].Electric Power Automation Equipment,2015,35(3): |
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| 摘要: |
| 针对携带不平衡负荷的Y，yn0接线和D，yn11接线配电变压器，提出了改进的配电变压器短路电抗在线检测方法。该方法通过测量配电变压器在不同负荷情况下高压侧和低压侧的电压、电流，在线计算变压器的短路电抗。该方法不受高／低压侧的电压、激磁电流变化和负荷不平衡度的影响。利用MATLAB／Simulink对所提方法进行仿真，结果显示在三相负荷不平衡的情况下，采用所提方法可精确计算绕组短路电抗。 |
| 关键词: 配电 变压器 接线方式 不对称负荷 短路电抗 在线检测 |
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| 基金项目:基金项目：国家重点基础研究发展计划（973计划）资助项目（2012-CB215200）；输配电装备及系统安全与新技术国家重点实验室项目（2007-DA10512713202） |
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| Improved method of online measuring for distribution transformer short circuit reactance |
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WANG Minglin, CHEN Minyou, LAI Wei, PENG Lin
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State Key Laboratory of Power Transmission Equipment & System Security and New Technology，School of Electrical Engineering，Chongqing University，Chongqing 400044，China
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| Abstract: |
| An improved method is proposed for the online measuring of distribution transformer short circuit reactance with unbalanced load in Y，yn0 or D，yn11 connection mode，which，immune to the variation of voltages and exciting current and the load imbalance，online measures the voltages and currents of distribution transformer with different loads and calculates its short circuit reactance. Simulation is carried out with MATLAB／Simulink and results show that，the short circuit reactance can be calculated accurately by the proposed method in the condition of extremely high load unbalance degree. |
| Key words: electric power distribution electric transformers connection patterns unbalanced loads short circuit reactance online measuring |
