NON-INVERTER BASED DISTRIBUTED ENERGY RESOURCE FOR USE IN A DYNAMIC DISTRIBUTION SYSTEM
First Claim
1. A controller for controlling a non-inverter based distributed energy resource, the controller comprising circuitry to:
- calculate a maximum frequency change for a generator based on a first comparison between a first power set point and a measured power from the generator;
calculate a minimum frequency change for the generator based on a second comparison between a second power set point and the measured power from the generator;
calculate an operating frequency for the generator based on a third comparison between a power set point and a measured power flow;
calculate a requested shaft speed for a prime mover by combining the calculated maximum frequency change, the calculated minimum frequency change, and the calculated operating frequency;
calculate a shaft speed adjustment for the prime mover based on a fourth comparison between the calculated requested shaft speed and a measured shaft speed of the prime mover; and
calculate a fuel command for the prime mover based on the calculated shaft speed adjustment to adjust a rotation rate of a shaft of the prime mover thereby controlling a frequency of an output power of the generator.
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Accused Products
Abstract
A microsource is provided, which includes a generator, a prime mover, and a controller. The prime mover includes a shaft connected to drive the generator to generate power at a frequency controlled by a rotation rate of the shaft. The controller calculates an operating frequency for the generator based on a comparison between a power set point and a measured power flow. A requested shaft speed for the prime mover is calculated by combining a maximum frequency change, a minimum frequency change, and the calculated operating frequency A shaft speed adjustment is calculated for the prime mover based on a comparison between the requested shaft speed and a measured shaft speed of the prime mover. A fuel command for the prime mover is calculated based on the shaft speed adjustment. A rotation rate of the shaft of the prime mover is adjusted based on the calculated fuel command to control the frequency.
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Citations
20 Claims
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1. A controller for controlling a non-inverter based distributed energy resource, the controller comprising circuitry to:
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calculate a maximum frequency change for a generator based on a first comparison between a first power set point and a measured power from the generator; calculate a minimum frequency change for the generator based on a second comparison between a second power set point and the measured power from the generator; calculate an operating frequency for the generator based on a third comparison between a power set point and a measured power flow; calculate a requested shaft speed for a prime mover by combining the calculated maximum frequency change, the calculated minimum frequency change, and the calculated operating frequency; calculate a shaft speed adjustment for the prime mover based on a fourth comparison between the calculated requested shaft speed and a measured shaft speed of the prime mover; and calculate a fuel command for the prime mover based on the calculated shaft speed adjustment to adjust a rotation rate of a shaft of the prime mover thereby controlling a frequency of an output power of the generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling a non-inverter based distributed energy resource, the method comprising:
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calculating a maximum frequency change for a generator based on a first comparison between a first power set point and a measured power from the generator; calculating a minimum frequency change for the generator based on a second comparison between a second power set point and the measured power from the generator; calculating an operating frequency for the generator based on a third comparison between a power set point and a measured power flow; calculating a requested shaft speed for a prime mover by combining the calculated maximum frequency change, the calculated minimum frequency change, and the calculated operating frequency; calculating a shaft speed adjustment for the prime mover based on a fourth comparison between the calculated requested shaft speed and a measured shaft speed of the prime mover; calculating a fuel command for the prime mover based on the calculated shaft speed adjustment; and adjusting a rotation rate of a shaft of the prime mover based on the calculated fuel command to control a frequency of an output power of the generator. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A microsource, the microsource comprising:
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a generator; a prime mover, the prime mover including a shaft connected to drive the generator to generate power at a frequency controlled by a rotation rate of the shaft; and a controller operably coupled with the prime mover and the generator, the controller including circuitry to calculate a maximum frequency change for the generator based on a first comparison between a first power set point and a measured power from the generator; to calculate a minimum frequency change for the generator based on a second comparison between a second power set point and the measured power from the generator; to calculate an operating frequency for the generator based on a third comparison between a power set point and a measured power flow; to calculate a requested shaft speed for the prime mover by combining the calculated maximum frequency change, the calculated minimum frequency change, and the calculated operating frequency; to calculate a shaft speed adjustment for the prime mover based on a fourth comparison between the calculated requested shaft speed and a measured shaft speed of the prime mover; and to calculate a fuel command for the prime mover based on the calculated shaft speed adjustment to adjust the rotation rate of the shaft of the prime mover thereby controlling the frequency.
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Specification