Transformerless, load adaptive speed controller
First Claim
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1. A method for producing quality AC output power to a load, comprising:
- measuring a set of properties of an actual load output;
measuring a speed of a variable speed energy generating device;
calculating a speed command signal using said speed and said properties;
converting said speed command signal into a throttle adjustment signal; and
adjusting said speed of said variable speed energy generating device using said throttle adjustment signal, thereby adjusting said AC output power to said load and responding to an increased load by calculating a load shed term and reducing a portion of said load based on said load shed term.
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Abstract
The invention in one embodiment is an improved variable speed engine/generator set with an integrated power conditioning system and control method including load shedding to generate high quality AC power with improved fuel efficiency and reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of engine and generator field. The transformerless power inverter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single phase, or unbalanced loading.
137 Citations
17 Claims
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1. A method for producing quality AC output power to a load, comprising:
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measuring a set of properties of an actual load output; measuring a speed of a variable speed energy generating device; calculating a speed command signal using said speed and said properties; converting said speed command signal into a throttle adjustment signal; and adjusting said speed of said variable speed energy generating device using said throttle adjustment signal, thereby adjusting said AC output power to said load and responding to an increased load by calculating a load shed term and reducing a portion of said load based on said load shed term. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for regulating a variable speed generator coupled to a load, comprising:
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measuring an actual load output; measuring a speed of said variable speed generator; deriving a speed command signal from said measuring; converting said speed command signal into a throttle adjustment signal; adjusting said speed of said variable speed generator using said throttle adjustment signal; inverting an output of said variable speed generator thereby producing an AC power generation and responding to a decrease in said speed and an increase in an output current by calculating a load shed term and reducing a portion of said load based on said load shed term. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification