A DSP based power electronics interface for alternate/renewable energy systems. Quarterly report 3. Page: 1 of 10
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Quarterly Report- 3
DOE Grant Number :- DE-FG36-99G 10390
Project Title:- A DSP based power electronics interface for alternate/renewable
This report is an update on the research project involving the implementation of a DSP
based power electronics interface for alternate/renewable energy systems, that was funded by the
Department of Energy under the Inventions and Innovations program 1998.
The objective of this research is to develop an utility interface (dc to ac converter) suitable to
interconnect alternate/renewable energy sources to the utility system. The DSP based power
electronics interface in comparison with existing methods will excel in terms of efficiency,
reliability and cost. Moreover DSP-based control provides the flexibility to upgrade/modify
control algorithms to meet specific system requirements. The proposed interface will be capable
of maintaining stiffness of the ac voltages at the point of common coupling regardless of
variation in the input dc bus voltage. This will be achieved without the addition of any extra
components to the basic interface topology but by inherently controlling the inverter switching
strategy in accordance to the input voltage variation.
System Block Diagram:
The block diagram of the proposed DSP based interface is shown in Figure 1. Texas
Instruments DSP TMS320F240 is used in the implementation of the controller. TMS320C24x is
the newest DSP family introduced by Texas Instruments Inc. for motor control and power
electronics applications. TMS320C240 has 12 PWM channels, 9 of which can be controlled
independently. A programmable dead band generator is provided to avoid shoot through faults in
a three phase voltage source inverter. The required currents or/and voltages can be sampled using
the integrated dual 10bit, 16 channel ADC. Moreover, the DSP (TMS320F240) which is chosen
to implement this algorithm not only provides the computational capability but also integrates all
the power electronics peripherals necessary to implement any such system. These peripherals
include PWM generators, timers, ADC etc.
2 8 2000
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A DSP based power electronics interface for alternate/renewable energy systems. Quarterly report 3., report, March 31, 2000; United States. (digital.library.unt.edu/ark:/67531/metadc708308/m1/1/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.