| 引用本文: | 滕予非,丁理杰,汤 凡,李 甘,史华勃.基于谐波互阻抗的励磁涌流引发谐波电压畸变风险识别[J].电力自动化设备,2014,34(8): |
| TENG Yufei,DING Lijie,TANG Fan,LI Gan,SHI Huabo.Risk identification based on harmonic mutual impedance for harmonic voltage distortion caused by excitation inrush current[J].Electric Power Automation Equipment,2014,34(8): |
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| 摘要: |
| 弱联系电网中普通的空载变压器合闸操作就可能会因向电网注入了励磁涌流，而导致系统出现严重的谐波电压畸变，加大设备及负荷损毁的风险。提出了励磁涌流引发谐波电压畸变风险指标，该指标基于系统网络的谐波互阻抗，考虑了被操作主变的容量以及系统中发电机、负荷、线路、变压器等元件对谐波电压畸变的影响。利用该指标对某联网工程中励磁涌流引发的谐波电压畸变风险进行了评估，PSCAD仿真结果验证了所提指标的有效性。 |
| 关键词: 励磁涌流 电压畸变 谐波互阻抗 风险 谐波分析 变压器 |
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| Risk identification based on harmonic mutual impedance for harmonic voltage distortion caused by excitation inrush current |
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TENG Yufei, DING Lijie, TANG Fan, LI Gan, SHI Huabo
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State Grid Sichuan Electric Power Research Institute，Chengdu 610072，China
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| Abstract: |
| Because of the excitation inrush current，even the energization of normal unloaded transformer may induce serious harmonic voltage distortion of weak interconnected grid，which increases the damage risk of grid equipments and appliances. A risk index based on the harmonic mutual impedance of power network is proposed for the harmonic voltage distortion caused by the excitation inrush current，which considers the capacity of the main transformer to be energized and the impacts of grid components on the harmonic voltage distortion，such as generators，loads，transmission lines and transformers. The introduced index has applied in the harmonic voltage distortion risk evaluation of a grid interconnection project. Its effectiveness is verified by the simulative results of PSCAD. |
| Key words: excitation inrush current voltage distortion harmonic mutual impedance risks harmonic analysis electric transformers |
