Power system having a voltage regulator with a notch filter
First Claim
1. A voltage regulator device for a power line, comprising:
- a first input terminal to receive a voltage signal for a DC bus and a second input terminal to receive a DC bus voltage reference signal;
a proportional path and an integral path to receive the DC bus voltage information and the voltage reference signal information;
a filter including a programmable notch filter tuned to a predetermined frequency that is twice a fundamental frequency of the power line to remove the predetermined frequency sequence components contained in the DC bus voltage signal; and
an output terminal to provide an output of the voltage regulator device with the predetermined frequency sequence components removed to control an inverter coupled to the DC bus.
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Accused Products
Abstract
A control system for an AC line voltage distribution system includes a DC energy storage system and an inverter coupled to the DC energy storage system adapted for coupling to the AC line distribution system. A proportional-integral voltage regulator coupled to the DC energy storage system receives a voltage signal for the DC energy storage system and receives a voltage reference. In an exemplary embodiment, the voltage regulator includes a proportional path and an integral path to receive the DC voltage information and the voltage reference signal information, a filter to remove an AC component having a predetermined frequency contained in the DC voltage signal, and an output terminal to output a control signal with the AC component removed.
19 Citations
19 Claims
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1. A voltage regulator device for a power line, comprising:
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a first input terminal to receive a voltage signal for a DC bus and a second input terminal to receive a DC bus voltage reference signal; a proportional path and an integral path to receive the DC bus voltage information and the voltage reference signal information; a filter including a programmable notch filter tuned to a predetermined frequency that is twice a fundamental frequency of the power line to remove the predetermined frequency sequence components contained in the DC bus voltage signal; and an output terminal to provide an output of the voltage regulator device with the predetermined frequency sequence components removed to control an inverter coupled to the DC bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control system for an AC power line voltage distribution system, comprising:
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a DC energy storage system; an inverter coupled to the DC energy storage system and adapted for coupling to the AC line distribution system; a modulator to provide control signals to the inverter; and a proportional-integral voltage regulator coupled to the DC energy storage system for receiving a voltage signal from the DC energy storage system and adapted for coupling to a voltage reference, the voltage regulator including; a proportional path and an integral path to receive the DC voltage information and the voltage reference signal information; a filter including a programming notch filter tuned to a predetermined frequency that is twice a fundamental frequency of the power line to remove the predetermined frequency sequence components contained in the DC bus voltage signal; and an output terminal to provide an output of the voltage regulator with the sequence components removed for input to a current regulator for generating control signals to control the inverter. - View Dependent Claims (11, 12, 13)
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14. A method, comprising:
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receiving a voltage on a DC bus; receiving a reference voltage; processing the DC bus voltage and the reference voltage in a proportional path of a voltage regulator; processing the DC bus voltage and the reference voltage in an integral path of the voltage regulator; combining an output of the proportional path and an output of the integral path and removing, using a programmable notch filter tuned to a predetermined frequency that is twice a fundamental frequency of the power line, predetermined frequency sequence components from the combined proportional path output and the integral path output; and generating an output control signal with an ac component removed to control an inverter coupled to the DC bus. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification