| 引用本文: | 丁志林,文 曹,贺星棋,刘俊丽.500 kV大变比变压器铁磁谐振分析[J].电力自动化设备,2012,32(2): |
| DING Zhilin,WEN Cao,HE Xingqi,LIU Junli.Ferromagnetic resonance analysis for 500 kV transformer with big ratio[J].Electric Power Automation Equipment,2012,32(2): |
|
| 摘要: |
| 根据实际运行中出现的铁磁谐振现象，利用伏安特性曲线分析操作过程中在具有大电感量的变压器、断路器的均压电容与电容式电压互感器间发生铁磁谐振的机理及过程的基础上，结合PSCAD／EMTDC的仿真分析结果，对激发铁磁谐振的相关因素进行了统计分析，并对事故中电压振荡的发生过程进行了详细描述。根据分析结果，从破坏谐振激发条件的角度提出了抑制此类铁磁谐振的4条解决思路，恰当运用这些措施，就能有效避免铁磁谐振的发生，确保系统的可靠运行。 |
| 关键词: 谐振 过电压 变压器 电压谐振 仿真 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Ferromagnetic resonance analysis for 500 kV transformer with big ratio |
|
DING Zhilin, WEN Cao, HE Xingqi, LIU Junli
|
|
EHV／UHV Operation & Maintenance Company，Sichuan Electric Power Company，Chengdu 610041，China
|
| Abstract: |
| Based on the ferromagnetic resonance occurring in practical operation，the mechanism of ferromagnetic resonance among the transformer with large inductance，the grading capacitor of circuit breaker and the capacitive voltage-transformer are studied using the volt-ampere characteristics analysis. Combined with the simulative results of PSCAD／EMTDC，the relevant factors exciting ferromagnetic resonance are statistically analyzed and the voltage oscillation process during ferromagnetic resonance is described in detail. Four countermeasures are proposed to effectively avoid the occurrence of ferromagnetic resonance by destroying its excitation conditions. |
| Key words: resonance overvoltage electric transformers voltage resonance computer simulation |
