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Taking two power cells cascaded as an example, a PWM algorithm is proposed for single-phase cascaded H-bridge three-level converter. Rectification operating mode of the three-level converter is described in detail in this paper. In order to lower the switching frequency and balance the capacitor voltage, the output voltage vectors are optimal selected for the rectification operating modes, and the...
A novel approach to Permanent Magnet Synchronous Motor(PMSM)Drive System and Stator Flux Observer based on line active disturbance rejection controller (LADRC) is presented in this paper. The LADRC controller does not dependent on the accurate mathematical model of motor. which lead to good dynamic and static performance for drive system. A flux observer based on line extended state observer (LESO)...
Power battery pack is the energy source of pure electric vehicles, hybrid vehicles and battery energy storage system for micro-grid energy source. In the practical work, The main factor affecting the stable operation of power battery pack is the cells' inconsistency, Inconsistencies will make the whole battery pack service life reduced greatly; The main factor affecting the efficient operation of...
The small wind generator is generally composed with permanent magnetism synchronic generator (PMSM) and other components, and the small wind generator is mainly employed to the single customer, hence it is important to keep the stability and the max power obtaining. The controller of it is only designed to adjust the generator and the current converter disregarding of the others. The controller for...
The energy shortage and environment pollution is attracting more and more attention with the social development. Hence it is important to develop new energy and renewable energy that are bio-energy, wind energy, solar energy, small waterpower, tide energy, terrestrial heat energy, and hydrogen energy and so on. The research of distributed power system with the solar and wind power is the leading domain...
The biogas generation is joined into the renewable energy distributed power system to counterpoise the diversification of wind generation and solar energy by reason of the weather. The biogas is renewable, and the capacity is hardly influenced by the weather. The output power of biogas generation is direct ration to the consumption of biogas; hence the modulation of output power is key to ensure the...
The energy shortage and environment pollution is attracting more and more attention with the social development. Hence it is important to develop new energy and renewable energy that are bio-energy, wind energy, solar energy, small waterpower, tide energy, terrestrial heat energy, and hydrogen energy and so on. The research of distributed power system with the solar and wind power is the leading domain...
The third order of the high frequency parts of the whole wind speed are changed greatly, it is the input of wind turbine. The input determines the control value, so the control value is changed greatly in short time. The controller has the determine time to work. Hence, the input prediction control is introduced. Simply the wind speed is composed by basic signal and instantaneous signal, of which...
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