| 引用本文: | 邵文权,南树功,章霄微,李彦斌.带并补电抗器超／特高压输电线路单相瞬时故障拍频特性研究[J].电力自动化设备,2014,34(5): |
| SHAO Wenquan,NAN Shugong,ZHANG Xiaowei,LI Yanbin.Beat-frequency characteristics for single-phase transient fault of EHV／UHV transmission line with shunt reactor[J].Electric Power Automation Equipment,2014,34(5): |
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| 摘要: |
| 以带并联电抗器补偿的线路为研究对象，深入剖析了单相瞬时故障消失后产生拍频现象的机理和条件，探讨了瞬时故障低频自振分量的频率及幅值衰减特性，以及断开相电气量无显著拍频现象产生的条件。研究结果表明：故障电气量中产生明显拍频现象的条件为瞬时故障且电弧可靠熄灭，但部分瞬时故障由于工频和低频量幅值差过大、频差过小或低频自振分量幅值衰减过快，导致断开相电压与电抗器电流没有明显拍频现象，此时可采用非拍频特征判据实现故障性质识别。大量ATP仿真与物理实验模型仿真验证了上述理论分析的正确性。 |
| 关键词: 自适应重合闸 并联电抗器 瞬时故障 拍频 特高压输电 超高压输电 |
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| 基金项目:国家自然科学基金资助项目（51207119）；陕西省教育厅科研计划资助项目（12JK0572）；西安工程大学博士启动基金资助项目（BS1018） |
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| Beat-frequency characteristics for single-phase transient fault of EHV／UHV transmission line with shunt reactor |
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SHAO Wenquan, NAN Shugong, ZHANG Xiaowei, LI Yanbin
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Department of Electrical Engineering，Xi’an Polytechnic University，Xi’an 710048，China
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| Abstract: |
| The beat-frequency phenomena may occur after the single-phase transient fault of transmission line with shunt reactor is disappeared，the mechanism and conditions of which are deeply analyzed. The frequency and attenuation characteristics of low-frequency free oscillation component of transient fault and the conditions，under which no obvious beat-frequency phenomena will occur after the faulty phase are de-energized，are discussed. Results show that，the obvious beat-frequency phenomena will occur in faulty electrical variables only when the fault is transient and the arc is reliably extinguished. For some transient faults，if the difference between elementary- and low-frequency components is too big in amplitude and too small in frequency，or the low-frequency free oscillation component is quickly attenuated，no beat-frequency phenomena will occur in the voltage of tripped phase and the current of reactor，where the fault type can be identified by non-beat-frequency criteria. Simulative results of ATP and physical experiment model verify the correctness of theoretical analysis． |
| Key words: adaptive reclosure shunt reactor transient fault beat-frequency ＵＨＶ power transmission EHV power transmission |
