关键词: 换流变火灾, 温度场, 可脱落, 降噪板, 油枕, 阀厅封堵

Abstract:

In order to coordinate the relationship between the noise reduction board and fire emergency response in the converter station, and overcome the difficulties such as high cost and difficulty of the test, a fire dynamics software was used to simulate the fire scenes started at the transformer top and tap switch in the enclosed space of low voltage converter transformer, considering detachable, uncovered and undetachable noise reduction boards. Based on the temporal and spatial evolution data of fire temperature, the characteristic of fire temperature in converter transformer enclosure space using a detachable noise reduction board was discussed. The results show that the board melted and fell off 206 seconds after the transformer top fire, while the above behavior occurred 485 seconds after the tap switch fire. Under the action of the detachable noise reduction board, the temperature variation at the top of the transformer is rising, suddenly falling and rising again, because the enclosed space is opened and cooled. The detachable noise reduction board can reduce the heating rate at the oil pillow and the plugging structure of valve hall.

Key words: converter transformer fire, temperature field, detachable, noise reduction board, oil pillow, plugging structure