一起變壓器風冷系統電源切換故障分析及處理
劉洪晴
（廣東電網有限責任公司韶關供電局，廣東 韶關 512000）
摘 要：針對一起220 kV變壓器XKPLCF-8/N型風冷系統電源切換回路故障，闡述了風冷系統電源控制原理，及手動與自動控制過程，經外部硬件回路檢查和PLC程序邏輯檢查分析，得出了該故障主要原因是PLC程序設計缺陷，對此采取有效措施，避免了變壓器跳閘事故的發生，并提出了整改建議，為現場繼保人員提供參考。
關鍵詞：變壓器；風冷系統；電源切換；故障分析
中圖分類號：TM401+.2 文獻標識碼：B 文章編號：1007-3175(2020)06-0050-04
One Case of Fault Analysis and Treatment on the Power Switching of Transformer Air Cooling System
LIU Hong-qing
（Shaoguan Bureau,Guangdong Power Grid ,Shaoguan 512000, China）
Abstract: Aiming at a 220 kV transformer XKPLCF-8/N type air-cooled system power switching circuit failure, this paper describes the principle of power control of the air-cooled system, as well as the manual and automatic control processes. The external hardware loop inspection and PLC program logic inspection analysis show that the main cause of the failure is a PLC program design defect. Based on the analysis of the external hardware circuit inspection and the logic inspection of the PLC program, it was found that the main cause of the failure was a defect in the PLC program design. Effective measures were taken to avoid the occurrence of transformer tripping accidents, and rectification suggestions were proposed to provide a reference for the on-site relay personnel.
Key words: transformer; air cooling system; power switching; fault analysis
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