The Research On The SVPWM Control Strategy Of Three-Level Inverter

Multi-level voltage source inverter with low levels of high-voltage power device output, for the practical application of high voltage power device provides an effective means to solve their applications include:high voltage high power frequency conversion motor, reactive power compensation and active filtering, etc. Diode clamped three-level inverter device as a relatively low voltage requirements, the equivalent switching frequency is high, no dynamic voltage, and good output waveform, a high voltage high power applications in the field of research focus. As the three-level inverter switching devices and a number of control objectives, control complexity, so the PWM control method has been the core of research. Among the control strategy, the space vector modulation (SVPWM) has larger modulation range, can optimize output voltage waveform, easy-to-digital implementation, the advantages of higher DC voltage utilization, and thus subject to people's attention.This article from the following aspects of the three-level inverter system is analyzed and studied:1. Through access to a large number of domestic and foreign references, multi-level inverter with the awareness status of, a comprehensive comparison of multi-level inverter topology advantages and disadvantages of three typical.2. With diode clamped three-level inverter topology based on presented three-level inverter operation mechanism.3. Detailed study of the three-level inverter space vector modulation technique based on the two-level inverter.4. By MATLAB simulation software to simulate the proposed method has proved the correctness.