Study on energy conservation technology of double-fed motor system

Energy conservation project on motor system is one of the top ten energy-saving projects of National Eleventh Five-Year. This paper is about energy-saving control theory and technology on a doubly-fed motor system, which fully reflects control conception of energy-saving system and can achieve double-fed motor speed control to run energy-saving control, reactive power compensation control and motor reserve capacity use. The paper puts forward theory and control model on constant power control of double-fed motor and develops doublefed motor experiment system on energy-saving control. The theoretical analysis and experiment results show that there is a distinct effect of energy conservation by using the proposed energy-saving control theory and technology of doubly-fed motor system and the application advances the operational efficiency and reduces the wastage. It is suitable for long-term driving system of production equipments such as wind-running motor, pump and so on. It can be widely used and applied with bright future.