Line balancing ups
AssigneeSchneider Electric It Corporation
InventorGorm Gamborg
Life of this patent
Estimating the term…
Abstract
A method for controlling an uninterruptible power supply (UPS) having a polyphase power input and an input power circuit coupled to the polyphase power input includes determining to reduce a load on a first phase of the polyphase power input, and in response thereto, controlling the input power circuit to reduce a first input current drawn from the first phase by a first amount and increase a second input current drawn from a second phase of the polyphase power input by a second amount. The UPS may determine to reduce the load on the first phase in response to a request from a smart grid to reduce the load on the first phase or in response to a local determination to reduce the load on the first phase.
Claims20
A method for controlling an uninterruptible power supply (UPS) having a polyphase power input and an input power circuit coupled to the polyphase power input, the method comprising acts of:
- determining to reduce a load on a first phase of the polyphase power input;
- and
- in response thereto, controlling the input power circuit to reduce a first input current drawn from the first phase by a first amount and increase at least one second input current drawn from at least one second phase of the polyphase power input by a second amount.
An uninterruptible power supply (UPS), comprising:
- a polyphase power input having a first phase and a second phase;
- an input power circuit coupled to the polyphase power input and configured to draw a first input current on the first phase and draw a second current on the second phase;
- and
- a control unit coupled to the input power circuit and configured to:
- determine to reduce a load on the first phase;
- and
- in response thereto, control the input power circuit to reduce the first input current and increase the second input current.
An uninterruptible power supply (UPS), comprising:
- a polyphase power input having a first phase and a second phase;
- a rectifier circuit coupled to the polyphase power input and configured to draw a first input current on the first phase and draw a second current on the second phase;
- and
- means coupled to the rectifier circuit for determining to reduce a load on the first phase, and reducing the load on the first phase in response thereto.
Dependencies are inferred from the claim text.