Publication Type:

Conference Paper

Source:

2010 Joint International Conference on Power Electronics, Drives and Energy Systems, PEDES 2010 and 2010 Power India, New Delhi (2010)

ISBN:

9781424477821

URL:

http://www.scopus.com/inward/record.url?eid=2-s2.0-79952714603&partnerID=40&md5=b12c0d99470b2a3a1a4a0581d595b7bc

Keywords:

Capacitor voltage balance, Control strategies, Duty cycles, Electric inverters, Grid connected inverters, Modulation, Modulation indexes, Neutral point clamped inverters, Neutral voltage, Neutral-point voltages, Nonlinear load, Output voltages, Power converters, Power electronics, Space vector modulation, Space vector modulation method, Switch configuration, Three-level inverters, Vector modulation, Vector spaces, Vectors, Voltage balance, Voltage balancing, Voltage drift

Abstract:

This paper investigates the capacitor voltage balance scheme for a neutral point clamped inverter. A symmetrical space vector modulation is used to analyze the imbalance in neutral point voltage. This method overcomes the drawbacks of Nearest Three Vector modulation method. The redundancies of different switch configurations for the generation of the same output voltage are used to limit the voltage drift when modulation index is less than half. The deviation in the neutral voltage is further reduced by adjusting the duty cycle distribution variable. The voltage balance scheme is analyzed for linear and non linear loads. The performance of control strategy is also examined for a grid connected inverter.

Notes:

cited By (since 1996)0; Conference of org.apache.xalan.xsltc.dom.DOMAdapter@3d3349af ; Conference Date: org.apache.xalan.xsltc.dom.DOMAdapter@722a9f8c Through org.apache.xalan.xsltc.dom.DOMAdapter@4c50dae2; Conference Code:84171

Cite this Research Publication

Ra Krishna, Deepak, E. Sb, Kottayil, S. Kb, and Leijon, Ma, “Space vector modulation method to balance the neutral voltage for a three level inverter”, in 2010 Joint International Conference on Power Electronics, Drives and Energy Systems, PEDES 2010 and 2010 Power India, New Delhi, 2010.