Power regeneration management system
AssigneeHoneywell International Inc.
InventorLouis Cheng
Life of this patent
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Abstract
Properly managing surges of regenerative power is needed in systems where power is generated and distributed to mechanical and electrical loads to protect them from overvoltage. A controller provides protection against excess regenerative power when these systems operate at a wide range of speeds. Controller functions and control methods for overvoltage protection may include an added control loop for detecting an overvoltage condition, calculating a power factor and generating a gating signal to transition the controller into a motoring mode that converts the excess regenerative power into mechanical power.
Claims20
A controller comprising:
- a first regulator programmed to compute a power factor from a dc bus voltage signal fed to said first regulator;
- and
- a second regulator programmed to compute an ac current magnitude from said power factor and from a dc load current signal fed into said second regulator.
A power generation, distribution and management system comprising:
- at least a mechanical power generator;
- at least one motor;
- at least one mechanical load;
- a plurality of electrical loads, said electrical loads containing a plurality of bus capacitors;
- and
- a controller in direct communication with the motor, the electrical loads and the bus capacitors.
A method for regulating a power generation, distribution and management system comprising:
- feeding a dc bus voltage signal to a controller;
- feeding a dc load current signal;
- computing a power factor from said dc bus voltage input signal;
- computing an ac current magnitude from said power factor and said dc load current signal;
- computing ac current command values in a synchronous frame from said power factor and from said ac current magnitude;
- computing differences between said ac current command values and measured ac current values in said synchronous frame;
- computing output voltage command values from said computed differences;
- and
- producing gating signals from said output voltage command values.
Dependencies are inferred from the claim text.