Abulveleev I.R., Khramshin T.R., Kornilov G.P., Nikiforov G.V. Basic principles of space vector modulation for three-level NPC-inverters

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Abstract

The article shows a scheme of a two-link converter on the basis of a three-level active front-end and voltage source inverter incorporated into a high power electric drive. The authors considered the main ways to generate an output voltage of the inverter by means of pulse-width modulation. The basic operating principles of three-level NPC-inverter space vector PWM were considered including the generation of the output voltage vector. The article describes the formula to calculate the factors of length and turn-on time of monitoring keys, as well as the relationship between the changes in the duty cycle and the angle of the given vector for various values of the modulation index. The paper proposed standard switching sequence templates. It is of interest to produce an in-depth investigation of the proposed algorithms forming the inverter output voltage with the help of mathematical modeling, which will be done in future.

Keywords

Three-level NPC-inverter, space vector pulse-width modulation, switching sequence.

Il'dar R. Abdulveleev

Post-graduate student, Electric Power Supply of Industrial Enterprises Department, Power Engineering and Automated Systems Institute, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia.

Timur R. Khramshin

Ph.D. (Eng.), Associate Professor, Electric Power Supply of Industrial Enterprises Department, Power Engineering and Automated Systems Institute, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia.

Gennadiy P. Kornilov

D.Sc (Eng.), Professor, Head of the department of electric power supply of industrial enterprises, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Gennadiy V. Nikiforov

D.Sc (Eng.), chairman of board of directors, Magnitogorskgazstroy LLC, Magnitogorsk, Russia.

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