Grid current regulation of a three-phase voltage source inverter with an LCL input filter
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- 13 May 2003
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 18 (3), 888-895
- https://doi.org/10.1109/tpel.2003.810838
Abstract
Many grid connected power electronic systems, such as STATCOMs, UPFCs, and distributed generation system interfaces, use a voltage source inverter (VSI) connected to the supply network through a filter. This filter, typically a series inductance, acts to reduce the switching harmonics entering the distribution network. An alternative filter is a LCL network, which can achieve reduced levels of harmonic distortion at lower switching frequencies and with less inductance, and therefore has potential benefits for higher power applications. However, systems incorporating LCL filters require more complex control strategies and are not commonly presented in literature. This paper proposes a robust strategy for regulating the grid current entering a distribution network from a three-phase VSI system connected via a LCL filter. The strategy integrates an outer loop grid current regulator with inner capacitor current regulation to stabilize the system. A synchronous frame PI current regulation strategy is used for the outer grid current control loop. Linear analysis, simulation, and experimental results are used to verify the stability of the control algorithm across a range of operating conditions. Finally, expressions for ""harmonic impedance" of the system are derived to study the effects of supply voltage distortion on the harmonic performance of the system.Keywords
This publication has 7 references indexed in Scilit:
- Modeling and analysis of a feedback control strategy for three-phase voltage-source utility interface systemsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Control of a voltage-source converter connected to the grid through an LCL-filter-application to active filteringPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Design and control of an LCL-filter based three-phase active rectifierPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Improved transient and steady state voltage regulation for single and three phase uninterruptible power suppliesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Frequency-domain analysis of three-phase linear current regulatorsIEEE Transactions on Industry Applications, 2001
- A shunt active filter based on voltage detection for harmonic termination of a radial power distribution lineIEEE Transactions on Industry Applications, 1999
- A novel control to actively damp resonance in input LC filter of a three-phase voltage source converterIEEE Transactions on Industry Applications, 1997