Abstract
Classical discontinuous pulse width modulations (DPWM's) may not be efficiently applied in active power filters, because it is hard to predict the peak values of the inverter current, and consequently it is difficult to calculate the position of the clamped interval, that minimizes the switching losses in any operating point. This paper proposes a new discontinuous pulse width modulation strategy applied to shunt active power filters. The proposed modulation strategy detects the current vector position relative to the inverter voltage reference and determines instantaneously the optimum clamped duration on each phase. It achieves a clamped voltage pattern, with variable lengths depending on the magnitude of the inverter current. This property adaptively reduces the current stress and minimizes the inverter switching losses, regardless of its application. The proposed modulation strategy is described, analyzed and validated on a three-phase voltage source inverter, rated at 7 kVA, 400 V, controlled as an active power filter.
Original language | English |
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Title of host publication | Applied Power Electronics Conference, APEC 2007 - Twenty Second Annual IEEE |
Number of pages | 6 |
Publisher | Electrical Engineering/Electronics, Computer, Communications and Information Technology Association |
Publication date | 2007 |
Pages | 315-321 |
ISBN (Print) | 1-4244-0713-3 |
DOIs | |
Publication status | Published - 2007 |
Event | Applied Power Electronics Conference, APEC 2007 - Twenty Second Annual IEEE - Anaheim, Ca., United States Duration: 25 Feb 2007 → 1 Mar 2007 |
Conference
Conference | Applied Power Electronics Conference, APEC 2007 - Twenty Second Annual IEEE |
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Country/Territory | United States |
City | Anaheim, Ca. |
Period | 25/02/2007 → 01/03/2007 |