Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Reexamination Certificate
2007-11-06
2007-11-06
Nguyen, Hoang (Department: 3748)
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
C060S660000, C060S671000
Reexamination Certificate
active
10839914
ABSTRACT:
The invention is a system and method for synchronizing an induction machine to an electrical grid. The embodiment described is an ORC power plant having a motor-generator in mechanical communication with a turbine. The motor-generator is operated with open windings (e.g., freewheeling) by driving the turbine with a variable speed pump. The rotational speed of the motor-generator is sensed. When the motor-generator is operating at a rotational speed near the steady state rotational speed that corresponds to operation of the ORC power plant, the contacts between the motor-generator windings and the grid are closed, and the motor is synchronized with the grid.
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I'm Longing for Something New. 2 pgs., www.isme.or.ip/led/NewsLetter41/41J5.htm, Apr. 20, 2004.
Cogswell Frederick James
Kang Pengju
Marjama Muldoon Blasiak & Sullivan LLP
Nguyen Hoang
UTC Power Corporation
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