Water cooling system of offshore wind generating unit

Abstract

The invention provides a water cooling system of an offshore wind generating unit. The water cooling system of the offshore wind generating unit comprises a water cooling pipeline, a pressure sensor, a water tank and a controller. The pressure sensor is used for detecting the water pressure of cooling liquid in the water cooling pipeline and sending water pressure signals. The water tank is connected with a water replenishing connector of the water cooling pipeline through a water replenishing pipe, the water tank is filled with cooling liquid and a water pump is arranged on the water replenishing pipe. When the water pressure in the water cooling pipeline is lower than a first preset water pressure value, the controller controls the water pump to start. When the water pressure in the water cooling pipeline is higher than a second preset water pressure value, the controller controls the water pump to stop. The controller is connected with the pressure sensor. According to the water cooling system of the offshore wind generating unit, on the condition that the needed water replenishing amount is very small, the controller and the water pump can be used for automatically completing the water replenishing task of the cooling system, water in the water tank can be used for a long time, when the water in the water tank cannot meet the water replenishing requirement, maintaining is conducted once, so that the maintaining frequency of the offshore wind generating unit can be reduced, therefore, the halting frequency of fans is reduced, the maintaining time is shortened, the maintaining cost is lowered, and shut-down power generation losses of the unit are reduced accordingly.

Description

technical field [0001] The invention relates to the technical field of wind power generation, and more specifically, relates to a water cooling system for an offshore wind power generating set. Background technique [0002] Due to the corrosion of salt spray in the atmosphere, the main heating components of offshore wind turbines (such as motors, frequency converters, transformers, etc.) are cooled by water cooling. In order to ensure the normal power generation of the unit, the system pressure of the water cooling system of the offshore wind turbine must be kept within a certain range. [0003] However, some situations, such as leakage of the pipeline or long-term natural evaporation of water in the pipeline, will cause the water pressure of the system to drop. When the water pressure of the system is lower than the set value, it will affect the circulation of the coolant in the cooling system. The cooling effect is greatly reduced, which affects the normal power generatio...

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Problems solved by technology

[0003] However, some situations, such as leakage of the pipeline or long-term natural evaporation of water in the pipeline, will cause the water pressure of the system to drop. When the water pressure of the system is lower than the set value, it will affect the circulation of the coolant in the cooling system. The cooling effect is greatly reduced, which affects the normal power generation of the unit. Therefore, whenever the water pressure is lower than the set value, the water cooling system needs to be maintained once, and the water should be replenished. The number of maintenance is more, which will cause more shutdowns of the fan and affect the The generating capacity of the unit; even when a small amount of water needs to be replenished due to the natural evaporation of the coolant, water needs to be replenished once, and the unit will be shut down for a long time, the maintenance time is long, and the maintenance cost is high

[0004] However, in the special offshore wind farm environment, maintenance personnel need to bring liquid pumps, new coolant and pipelines to the unit for operation every time water is replenished. In environments such as weather, big waves, and dark nights, maintenance personnel will not be able to get on the machine, which will cause the unit to shut down and lose power generation.

[0005] In addition, at present, when replenishing water to the water cooling system, the final system water pressure is mainly controlled manually, which can easily cause the pressure to be too high to cause the coolant to leak from the safety valve, resulting in waste and polluting the environment in the cabin

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