强油风冷型主变压器风冷跳闸回路的改进

Improvement on trip circuit for main transformer with circulating oil forced air-cooled

针对无人值守变电站强油风冷型主变压器冷却器全停故障跳闸问题,对其风冷跳闸回路进行技术分析,提出了一种新的风冷跳闸回路。结果表明:通过在风冷跳闸回路上增加可遥控接点,实现了主变压器远方控制风冷跳闸;改进后的风冷跳闸回路运行良好,确保了无人值守变电站强油风冷型主变压器可靠、安全运行。

Aiming at the problem of cooler shutdown of main transformer with circulating oil forced air-cooled caused the failure trip in unattended substation,analyzes the air-cooled trip circuit,puts forward an new air-cooled trip circuit. The result shows that by increase remote contacts in air-cooled trip circuit,realizes remote control the air-cooled trip of main transformer,the improved air-cooled trip circuit operates well,ensures the reliable and safe operation of main transformer with circulating oil forced air-cooled in unattended substation.