Convertor station external cooling water system dilution pool, external cooling water dilution method and convertor station

The invention relates to the convertor station related technical field, and especially relates to a convertor station and a dilution method of external cooling water. The dilution method of the convertor station includes: filling a dilution pool body with fresh water having a designed volume, always storing the water with the designed volume in the dilution pool from beginning, discharging spray water and sewage of a water cooling system into the dilution pool body through a spray water inlet tube of the dilution pool body, and receiving rain to the dilution pool body through a rain inlet tube of the dilution pool body. According to the convertor station and the external cooling water dilution method, rainwater in the convertor station is fully collected, and is used for diluting spray water. The use of the very cheap rainwater to dilute substantially reduces the processing cost of the convertor station external cooling water system, and well and fully dilutes the spray water, so the destroy of the convertor