| 引用本文: | 李琼林,张力淼,余晓鹏,张晓东,杜习周.2起35 kV侧CVT熔断器熔断故障原因探析及解决措施[J].电力自动化设备,2012,32(1): |
| LI Qionglin,ZHANG Limiao,YU Xiaopeng,ZHANG Xiaodong,DU Xizhou.Two case studies for 35 kV CVT fuse breakdown and solutions[J].Electric Power Automation Equipment,2012,32(1): |
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| 摘要: |
| 在实际变电站开展电力电容器投切试验和现场测试的基础上，结合变电站内故障录波器记录的电容式电压互感器（CVT）熔断器爆裂时的真实故障波形数据，通过数据处理并结合理论分析，得出CVT一次侧的涌流或由于电抗元件饱和形成自身铁磁谐振而引起的过流是导致CVT一次侧熔断器异常熔断的直接原因。对实际工程中CVT高压侧熔丝的选型进行全面论证，建议在提高熔丝额定容量的同时，在CVT投运前加强对其铁磁单元及阻尼器的伏安特性测试。 |
| 关键词: CVT 涌流 熔断器 铁磁谐振 故障录波 解决措施 |
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| Two case studies for 35 kV CVT fuse breakdown and solutions |
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LI Qionglin1, ZHANG Limiao2, YU Xiaopeng1, ZHANG Xiaodong1, DU Xizhou1
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1.Henan Electric Power Research Institute，Zhengzhou 450052，China;2.Pingdingshan Power Supply Company，Pingdingshan 467000，China
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| Abstract: |
| Based on the site on-off tests of power capacitor in substation and according to the real fault recorder data of the primary-side CVT fuse breakdown，the data processing and theoretical analysis indicate that，its direct cause is the current surge at the primary side or the over-current induced by the self-ferromagnetic resonance of saturated reactance elements. The fuse type selection of HV-side CVT in practical projects is demonstrated and it is suggested to increase the rated capacity of CVT as well as to test the volt-ampere characteristic of its ferromagnetic cell and damper before it is put into operation. |
| Key words: CVT current surge electric fuses ferromagnetic resonance fault record solutions |
