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SHEPWM and Power Balance Control for Composite Cascade Multilevel Inverters for Medium and High Voltage Interfacing of Photovoltaic Systems(PDF)

南京师范大学学报(工程技术版)[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2011年01期
Page:
19-26
Research Field:
Publishing date:

Info

Title:
SHEPWM and Power Balance Control for Composite Cascade Multilevel Inverters for Medium and High Voltage Interfacing of Photovoltaic Systems
Author(s):
Zhang Yanli1Fei Wanmin2
1.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China; 2.School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210042,China
Keywords:
photo-voltaic systemmedium and high voltage interfacecascade multilevel inverterpulse width modulation power balance
PACS:
TM464
DOI:
-
Abstract:
With the increasing of the capacity and scale of photo-voltaic power systems,medium and high voltage inverters are economic and reasonable choices for transformerless interfaces of the photo-voltaic systems with utility grid. It is proposed that the composite cascade multilevel inverter may be the best topology for it can meet the high requirements for voltage level,high power converting efficiency and high waveform quality of output voltage. Selective harmonics elimination PWM method is probably the best control strategy for its advantages in high voltage waveform,high power efficiency and convenience in the control of the balance of power of each H-bridge. Take some typical points for examples,resolving method of the SHEPWM equations with power balance constraints are presented. Simulations and experiments are carried out,which prove the validity and practicability of the control method proposed.

References:

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Last Update: 2013-03-21