NiHaoMike |
06-04-14 05:24 PM |
They can certainly help, but in the case of standalone (off grid) inverters, the main thing that could be done to vastly improve overall system efficiency is to use DSP to optimize the output waveform for the load. For example, if it detects an electronic load, it would output a controlled edge square wave or "trapezoid wave". If it detects a motor load, it would output a sine wave and also try to optimize the V/Hz ratio. At the same time, it can shift the frequency up and down in order to extend battery runtime or make more effective use of energy production.
The main problem with that idea is that if the load is composite (combination of electronic and motor loads or multiple unlike motor loads), the inverter would have to compromise. Typically, those who pay a lot for a top notch inverter would want one that "runs everything", while such a "smart inverter" idea works the best when used in a PoL (Point of Load) configuration. I think the solution is to essentially convert the motor loads into electronic loads with PoL VFDs and the central inverter can then be designed to only run electronic loads.
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