ELECTRIC POWER SUPPLY SYSTEM
First Claim
1. An electric power supply system comprising:
- an electric power generator for generating an electric power;
an electricity storage device for being charged with the electric power from the electric power generator, and supplying the electric power to an electrical load;
an electric power distributing device for distributing the electric power to be supplied to the electrical load, from the electric power generator and the electricity storage device at a sharing ratio therebetween; and
a control unit for determining the sharing ratio of the electric power and controlling the electric power distributing device, whereinthe control unit detects a frequency distribution of the electric power of the electric power supply system regarding a magnitude of the electric power, which includes an assist region and a fuel cell following region, the fuel cell following region having a high frequency of the magnitude of the electric power, and an assist region having a low frequency of the magnitude of the electric power, whereinthe control unit determines to operate the electric power distributing device to output the electric power from the electric power generator and the electricity storage device at the sharing ratio, and wherein,a value of the sharing ratio of the electricity storage device in the assist region is higher than a value of the sharing ratio of the electricity storage device in the fuel cell following region.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric power supply system can determine a sharing ratio of an electric power so as to increase and decrease an output electric power supplied by an electric power generator in accordance with an output electric power value required for the electric power supply system, in a fuel cell following region where a frequency of a magnitude of the electric power is equal to or higher than a predetermined value in a frequency distribution of a magnitude of the electric power, and can determine the sharing ratio of the electric power so as to increase an output electric power supplied by an electricity storage device, in an assist region where the frequency is lower than a predetermined value in the frequency distribution, and can prevent an excess of discharging from an electricity storage device.
48 Citations
11 Claims
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1. An electric power supply system comprising:
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an electric power generator for generating an electric power; an electricity storage device for being charged with the electric power from the electric power generator, and supplying the electric power to an electrical load; an electric power distributing device for distributing the electric power to be supplied to the electrical load, from the electric power generator and the electricity storage device at a sharing ratio therebetween; and a control unit for determining the sharing ratio of the electric power and controlling the electric power distributing device, wherein the control unit detects a frequency distribution of the electric power of the electric power supply system regarding a magnitude of the electric power, which includes an assist region and a fuel cell following region, the fuel cell following region having a high frequency of the magnitude of the electric power, and an assist region having a low frequency of the magnitude of the electric power, wherein the control unit determines to operate the electric power distributing device to output the electric power from the electric power generator and the electricity storage device at the sharing ratio, and wherein, a value of the sharing ratio of the electricity storage device in the assist region is higher than a value of the sharing ratio of the electricity storage device in the fuel cell following region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of limiting an excess of discharging from a fuel cell system comprising:
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an electric power supply system comprising; an electric power generator for generating an electric power; an electricity storage device for receiving and charging the electric power from the electric power generator, and supplying the electric power to an electrical load; an electric power distributing device for distributing the electric power to the electrical load, from the electric power generator and the electricity storage device at a sharing ratio therebetween; and a control unit for determining the sharing ratio of the electric power and controlling the electric power distributing device, wherein the method comprising the steps of; detecting a frequency distribution of the electric power of the electric power supply system regarding a magnitude of the electric power, which includes an assist region and a fuel cell following region, the fuel cell following region having a high frequency of the magnitude of the electric power, and an assist region having a low frequency of the magnitude of the electric power; and determining to operate the electric power distributing device to output the electric power from the electric power generator and the electricity storage device at the sharing ratio, and wherein a value of the sharing ratio of the electricity storage device in the assist region is higher than a value of the sharing ratio of the electricity storage device in the fuel cell following region.
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Specification