Power controller

Details Power controller Power controller

1998-12-08

2002-11-26

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

Reexamination Certificate

active

06487096

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to power generation and processing systems and in particular to distributed generation power systems.
2. Description of the Prior Art
Conventional power generation and distribution systems are configured to maximize the specific hardware used. In the case of a turbine power motor, for example, the output or bus voltage in a conventional power distribution system varies with the speed of the turbine. In such systems, the turbine speed must be regulated to control the output or bus voltage. Consequently, the engine cannot be run too low in speed else the bus voltage would not be high enough to generate some of the voltages that are needed. As a result, the turbine would have to be run at higher speeds and lower temperatures, making it less efficient.
What is needed therefore is a power generation and distribution system where the bus voltage is regulated by a bi-directional controller independent of turbine speed.
SUMMARY OF THE INVENTION
The present invention provides in a first aspect, a power controller which provides a distributed generation power networking system in which bi-directional power converters are used with a common DC bus for permitting compatibility between various energy components. Each power converter operates essentially as a customized bi-directional switching converter configured, under the control of the power controller, to provide an interface for a specific energy component to the DC bus. The power controller controls the way in which each energy component, at any moment, will sink or source power, and the manner in which the DC bus is regulated. In this way, various energy components can be used to supply, store and/or use power in an efficient manner. The various energy components include energy sources, loads, storage devices and combinations thereof.
In another aspect, the present invention provides a turbine system including a turbine engine, a load, a power controller, an energy reservoir for providing transient power to the DC bus and an energy reservoir controller, in communication with the power controller for providing control to the energy reservoir. The power controller includes an engine power conversion in communication with the turbine engine, an utility power conversion in communication with the load and a DC bus.
These and other features and advantages of this invention will become further apparent from the detailed description and accompanying figures that follow. In the figures and description, numerals indicate the various features of the invention, like numerals referring to like features throughout both the drawing figures and the written description.


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