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| 摘要: |
| 传统故障分析方法中常采用忽略相移影响的漏抗模型作为变压器模型,当需要考虑变压器相移影响时,再利用相移公式分别对正、负序分量进行修正。为了明确这种在变压器模型之外考虑相移作用的方法对故障分析结果的影响,分别建立了传统的变压器模型与由3台单相饱和变压器按照实际连接组别连成1台三相变压器的电磁暂态仿真程序(ATP)仿真模型,在线路发生各种不对称短路故障的情况下,考虑相移作用,计算了上述2种不同模型下的变压器两侧的电气量,以ATP仿真模型为参照进行了定量的误差分析,对传统方法的准确度进行了研究。 |
| 关键词: 变压器相移,故障分析,仿真模型,ATP |
| DOI： |
| 分类号:TM77 |
| 基金项目: |
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| Effect of transformer phase shifting on fault analysis model of power system |
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WANG Anning CHEN Qing
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| Abstract: |
| In the conventional fault analysis method,transformer is normally expressed by a leakage reactance model,which ignores the phase shifting effect.When it should be considered,the resulted positive and negative sequence components are then modified according to phase shifting formula.To verify its effect,two transformer models are built,traditional model and ATP(Alternative Transient Program) simulation model.The latter is a three-phase transformer composed of three single-phase transformers with actual winding connections.The voltages and currents on both sides of transformer are calculated for both models under various short-circuit faults,considering phase shifting effect.With the ATP model as reference,the accuracy of conventional model is quantitatively studied. |
| Key words: transformer phase shifting,fault analysis,simulation model,ATP |
