High-pressure multi- level inverter control strategy of its modeling
|School||Central South University|
|Keywords||Multi- level inverter Space vector pulse width modulation Space vector control MATLAB / SIMULINK|
With the development of electric drive technology , high frequency control of large - capacity transmission technology in the field of AC motor drive has been widespread application . Multi - level inverter and the traditional two -level inverter compared in terms of output level number output waveform approximation in the sine wave characteristics , become a hotspot of research in this field . This paper analyzes the diode clamped multi- level inverter capacitor clamped multi- level inverter cascade multi- level inverter works ; discusses the triangular carrier lamination method , specific harmonic elimination method , the carrier phase shift method , multi carrier PWM method , based on the degree of freedom of a combination of the PWM control method , the unit vector shift the seven control strategy of the phase space vector pulse width modulation method , the basic control principle ; and studied in detail in Chapter diode clamp three - level inverter with a midpoint potential of space vector pulse width modulation control algorithm , the midpoint potential balance ; Chapter IV presents a novel cascade multi- level inverter topology and research space vector control algorithm ; MATLAB / SIMULINK environment at the same time these two multi - level inverter system modeling and simulation . The simulation results show that these two multi - level inverter output line voltage , line current is nearly sinusoidal , thus proving the effectiveness of the two control algorithms .