Power controller
First Claim
1. A power controller, provided for a system comprising a power generator and an electrical storage device which are installed in a residential system, the power generator being configured to generate electricity from natural energy and the electrical storage device being configured to charge and discharge a battery, the system being configured to choose a power supply system, the power generator and the electrical storage device to supply energy to an electric load, and also to allow energy from the power generator to flow back to the power supply system,wherein the power controller comprises:
- a first energy acquisition part configured to acquire demand energy for the electric load in the residential system;
a second energy acquisition part configured to acquire generating power measured with respect to the power generator;
an energy surplus judgment part configured to perform a conditional judgment about excess generating energy at prescribed intervals, said excess generating energy being a difference between the demand energy acquired through the first energy acquisition part and the generating energy acquired through the second energy acquisition part; and
an overall operation controller configured to choose between charging and discharging of the electrical storage device in response to a result of the conditional judgment through the energy surplus judgment part,said overall operation controller being configured;
without applying the generating energy of the power generator to the demand energy, to allow it to be stored in the electrical storage device when a first condition is established, said first condition corresponding to a case where the generating energy is equal to or less than the demand energy to which a predetermined judgment threshold is added; and
to apply the stored energy in the electrical storage device to the demand energy for the electric load when a second condition is established, said second condition corresponding to a case where the generating energy exceeds the demand energy to which the judgment threshold is added.
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Accused Products
Abstract
Residential system includes photovoltaic power system including solar battery, and electrical storage device including battery. Electric load of residential system is selectively supplied with energy from power supply system, power generator and electrical storage device. Power generator allows energy to flow back to power supply system. Energy surplus judgment part calculates difference between generating energy of power generator and demand power for electric load (excess generating energy). Overall operation controller applies stored energy in electrical storage device to demand energy for electric load when excess generating energy is produced, and charges electrical storage device without applying generating energy of power generator to demand energy when excess generating energy is not produced.
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Citations
13 Claims
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1. A power controller, provided for a system comprising a power generator and an electrical storage device which are installed in a residential system, the power generator being configured to generate electricity from natural energy and the electrical storage device being configured to charge and discharge a battery, the system being configured to choose a power supply system, the power generator and the electrical storage device to supply energy to an electric load, and also to allow energy from the power generator to flow back to the power supply system,
wherein the power controller comprises: -
a first energy acquisition part configured to acquire demand energy for the electric load in the residential system; a second energy acquisition part configured to acquire generating power measured with respect to the power generator; an energy surplus judgment part configured to perform a conditional judgment about excess generating energy at prescribed intervals, said excess generating energy being a difference between the demand energy acquired through the first energy acquisition part and the generating energy acquired through the second energy acquisition part; and an overall operation controller configured to choose between charging and discharging of the electrical storage device in response to a result of the conditional judgment through the energy surplus judgment part, said overall operation controller being configured; without applying the generating energy of the power generator to the demand energy, to allow it to be stored in the electrical storage device when a first condition is established, said first condition corresponding to a case where the generating energy is equal to or less than the demand energy to which a predetermined judgment threshold is added; and to apply the stored energy in the electrical storage device to the demand energy for the electric load when a second condition is established, said second condition corresponding to a case where the generating energy exceeds the demand energy to which the judgment threshold is added. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification