Minimum-cost EVPV for vehicle-solar-grid integration
First Claim
1. An apparatus for bidirectional power conduction from and to an electric vehicle comprising:
- connection, switching and control devices to permit the apparatus to provide ancillary services to the electric utility grid while also providing electric energy to recharge the electric vehicle comprising;
drawing DC power from a battery of the electric vehicle and passing the power through a DC connection and converting it to AC power by feeding it to an inverter of an existing photovoltaic power system whenever the photovoltaic array is producing power worth less that the ancillary services enabled by the apparatus, andputting electric energy back into the vehicle battery through an AC connection to an existing onboard battery charger of the vehicle, both of said DC and AC connections being connected to the vehicle simultaneously and continuously while it is parked for charging.
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Accused Products
Abstract
This invention consists of an apparatus to interface an electric vehicle battery with a solar photovoltaic system and a method of using the apparatus to provide back up power during grid outages and ancillary service revenue from the grid. The apparatus uses the solar PV inverter to provide bidirectional power flow from the battery during night-time hours, or whenever the solar array is producing insufficient power. The apparatus thus consists only of switches and control and measurement equipment. It relies on the otherwise underutilized inverter and the on-board vehicle battery charger as the power electronic components, thus minimizing cost.
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Citations
14 Claims
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1. An apparatus for bidirectional power conduction from and to an electric vehicle comprising:
connection, switching and control devices to permit the apparatus to provide ancillary services to the electric utility grid while also providing electric energy to recharge the electric vehicle comprising; drawing DC power from a battery of the electric vehicle and passing the power through a DC connection and converting it to AC power by feeding it to an inverter of an existing photovoltaic power system whenever the photovoltaic array is producing power worth less that the ancillary services enabled by the apparatus, and putting electric energy back into the vehicle battery through an AC connection to an existing onboard battery charger of the vehicle, both of said DC and AC connections being connected to the vehicle simultaneously and continuously while it is parked for charging. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification