Why should stator cooling water maintain low conductivity?

Introduction Why must the stator cooling water maintain low conductivity? 1. An increase in conductivity will cause current leakage into the cooling water. An increase in conductivity indicates that impurities appear in the water if they are not treated in time.

Why should stator cooling water maintain low conductivity?

1. An increase in conductivity will cause current leakage into the cooling water. An increase in conductivity indicates the presence of impurities in the water. If it is not treated in time, there will be more and more impurities, which will increase the conductivity. amount of current in the water. Once the leak occurs, it will also have a greater impact. Sometimes the leakage current will be relatively large, causing the generator to malfunction. Impurities in the water will also worsen the aging of the generator water line, reduce its lifespan, and cause premature signs of damage.

2. The stator cooling water working system is independent and closed, and it is a continuous circulation process. After a long time of use, the cooling water quality will also have problems. mainly because during thecirculation process, the metal parts of the generator continue to circulate and come into contact with the air. These substances will affect the quality and purity of the cooling water. If they continue to circulate, it will inevitably make the situation worse. Water pollution, thereby destroying the proper circulation of the circulation pipeline and affecting the quality of the cooling water. Cooling water circulation and cooling water efficiency. Therefore, the quality of the cooling water will decrease, resulting in an increase in conductivity, causing the generator stator to become isolated, the water pipes to age or damage, and even damage the generator.

To summarize, it is to prevent excessive electrical conductivity from aging the stator coil insulation material and causing leakage accidents.

The ref water temperature rangeCooling of the generator coil is 40-50℃. An automatic adjustment device is provided to adjust the inlet water temperature, and the cooling water temperature fluctuation range is not more than 2°C. The water temperature at the battery outlet must not be higher than 85°C. This is a requirement for 660 MW units. As for alarms and triggering, the regulations of each manufacturer stipulate this.

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