Abstract
The performances of the P+Resonant controller in case of current control for a single phase grid connected inverter have been proved to be superior to the PI controller, since it is able to remove the phase error of the control at the fundamental frequency of the grid. It offers also the possibility of selective harmonic compensation. However, in case of digital implementation on a low-cost fixedpoint DSP, the limited computational power and the limited numerical representation precision can restrict the utilization of it. The present paper proposes a different way of digital implementation of the P+Resonant controller with selective harmonic compensation on a low-cost fixed-point DSP. The resonant part of the P+R has been implemented as a second order filter based on Delta operator. The current controller, together with harmonic compensation for the 3rd, 5th, and 7th harmonics has been successfully tested in practice with a 1.5KW PV inverter, achieving a 1.2% Total Harmonic Distortion (THD) of the grid current.
Original language | English |
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Title of host publication | 32nd Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005 |
Number of pages | 6 |
Publisher | Electrical Engineering/Electronics, Computer, Communications and Information Technology Association |
Publication date | 2005 |
Pages | 2511 - 2516 |
Publication status | Published - 2005 |
Event | IECON’05 - Raleigh NC, United States Duration: 6 Nov 2005 → 10 Nov 2005 Conference number: 32 |
Conference
Conference | IECON’05 |
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Number | 32 |
Country/Territory | United States |
City | Raleigh NC |
Period | 06/11/2005 → 10/11/2005 |