Outside-valve air-cooling system auxiliary spraying device of converter transformer substation

Abstract

The invention relates to an outside-valve air-cooling system auxiliary spraying device of a converter transformer substation. The outside-valve air-cooling system auxiliary spraying device is characterized by comprising a water source, wherein the water source is connected with an inlet of a vertical centrifugal pump (1) through a precise filter (2), an outlet of the vertical centrifugal pump (1) is communicated with a spraying water pipe, the spraying water pipe is commucnited with at least one spray head (4), and the spray head (4) is arranged above an air cooler finned tube in the outside-valve air-cooling system auxiliary spraying device of the converter transformer substation. For preventing trip caused by ultra-high cooling water inlet valve temperature of a valve cooling system, the operating reliability of the device is improved. The outside-valve air-cooling system auxiliary spraying device of the converter transformer substation can effectively reduce the inlet valve temperature of a converter valve.

Description

technical field [0001] The invention relates to an auxiliary spraying device for an external air cooling system of a converter substation. Background technique [0002] In recent years, DC transmission projects suitable for long-distance and large-capacity have developed rapidly in my country. Compared with AC transmission projects, the advantages of DC transmission projects are self-evident, but there are also some disadvantages, such as high cost, complex structure, and large losses of DC transmission projects. One of the most important points is that the reliability of DC transmission systems is poor. , which is not conducive to grid security. As the core auxiliary equipment of the converter station, the valve cooling system's safe and stable operation directly affects the reliability of the DC transmission system. The valve cooling system is divided into valve internal cooling system and valve external cooling system. At present, the external cooling system of domesti...

AI Technical Summary

Problems solved by technology

During the actual operation, the following problems occurred: the outdoor temperature reached about 40°C at noon in summer, and the 24 fans in each pole were running at the maximum speed of 50Hz. At this time, the cooling water inlet valve temperature reached 44°C, which was close to the high inlet valve temperature alarm value of 48 ℃

This is because the external air cooling system is greatly affected by the environment. If the ambient temperature is high, the heat exchange efficiency of the air cooler will deteriorate. Therefore, it is urgent to consider designing an auxiliary spray device to reduce the temperature of the cooling water inlet valve.

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