Abstract
The water levels influenced by seasons are varying, which needs a great variation of pumping head. The motor now used with complex speed equipment and high cost cannot satisfy the requirement. The paper takes the renovation and transformation of Song Long pumping station as an example, analyses the effect of using large double-speed salient pole synchronous motor. It offers a comparative analysis of the energy-saving benefit, which has three major evaluation indexes: device efficiency, unit energy loss and the benefits. The related research results can be referenced in the renovation and transformation of pumping station.
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