Analytical and simulation comparison of sinusoidal and resistive modulation strategies for network-friendly three-phase grid-connected inverters

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Abstract
The growing numbers of consumers distort AC networks with harmonics. Therefore suppression of the network pollution should be considered. This problem can be solved by using ``network-friendly´´ converters. In our study we examined two modulation strategies of three-phase grid-connected inverters. If these methods are used, converters behave like sinusoidal or resistive current loads of the network, which enables ``network-friendly´´ operation. The examined sinusoidal and the resistive modulation strategies are known, but the differences between the two methods have not been studied before [1,2]. This paper deals with the comparison of these two strategies. First, the analytical examination is presented. By comparing their consumed RMS currents we defined a coefficient (k[%]), which depends only on the total harmonic distortion of the network voltage (THD_u). We demonstrated that at high THD_u resistive modulation method is more favorable. Then simulation examination is discussed, by presenting our model of the three-phase four quadrant converter. Finally simulation results are represented in this article.- Title
- Analytical and simulation comparison of sinusoidal and resistive modulation strategies for network-friendly three-phase grid-connected inverters
- Author
- Balázs, Gergely György
- Schmidt, István
- M. Horváth
- Date of issue
- 2010
- Access level
- Open access
- Publisher
- Budapest University of Technology and Economics
- Language
- en
- Page
- 21 - 28
- Subject
- converter control, harmonics, modulation strategy, optimal control, power quality, Park vector theory, pulse width modulation (PWM)
- Version
- Postprint
- Identifiers
- MTMT: 2654775
- Scopus: 84856825098
- Title of the container document
- Periodica Polytechnica - Electrical Engineering
- Volume of container document
- 54
- Number of container document
- 1-2
- ISSN, e-ISSN
- 0324-6000
- 1587-3781
- Document type
- folyóiratcikk
- Document genre
- Tudományos cikk