Control device for hybrid electric power system

Patent metadata

Field	Value
Publication number	US-9535436-B2
Application number	US-201314053406-A
Country	US
Kind code	B2
Filing date	Oct 14, 2013
Priority date	Nov 16, 2012
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A electric power control device for a hybrid electric power system according to the present disclosure includes an electric power measuring unit that is configured to measure output electric power of the electric power system, and a controller that is configured to control operations of a first electric power generator and a second electric power generator of the electric power system based on a preset control mode and the measured output electric power, wherein the controller controls an output voltage of the first electric power generator to be a first offset voltage corresponding to an output of the second electric power generator for a first time when the output of the second electric power generator is controlled to be switched from an ON state into an OFF state.

First claim

What is claimed is:

1. A electric power control device for a hybrid electric power system, the device comprising:
an electric power measuring unit configured to measure output electric power of the electric power system; and
a controller configured to:
control operations of a first electric power generator and a second electric power generator of the electric power system based on a preset control mode and the measured output electric power;
control an output voltage of the first electric power generator to be a first offset voltage corresponding to an output of the second electric power generator for a first time duration when the output of the second electric power generator is controlled to switch from an ON state to an OFF state; and
control the output voltage of the first electric power generator to be a second offset voltage corresponding to the output of the second electric power generator for a second time duration when the output of the second electric power generator is controlled to switch from the OFF state to the ON state.

2. The device of claim 1 , wherein the controller is further configured to change an operation mode of the first electric power generator to an offset voltage mode when the operation mode corresponds to the first time duration or the second time duration.

3. The device of claim 2 , wherein the controller is further configured to control the first electric power generator in a maximum electric power point tracking control mode for time durations other than the first time duration and the second time duration.

4. The device of claim 1 , wherein:
the first electric power generator comprises a solar energy generator; and
the second electric power generator comprises a fuel cell energy generator.

5. The device of claim 1 , wherein the controller is further configured to control the output of the second electric power generator switch from the ON state to the OFF state when a quantity of load-required electric power measured by the electric power measuring unit is below a predetermined value.

6. The device of claim 1 , wherein the controller is further configured to control the output of the second electric power generator switch from the OFF state to the ON state when a quantity of load-required electric power measured by the electric power measuring unit exceeds the output voltage of the first electric power generator.

7. The device of claim 1 , wherein the first offset voltage is determined by an electric power transfer characteristic of the second electric power generator.

8. The device of claim 1 , wherein a response rate of an output change according to control of the first electric power generator is configured to be faster than a response rate of an output change according to the control of the second electric power generator.

9. The device of claim 1 , wherein the second offset voltage is determined by an electric power transfer characteristic of the second electric power generator.

Assignees

• Lsis Co Ltd

Inventors

• Nguyen Khanh-Loc

Classifications

• G05F1/10 Primary

  Regulating voltage or current  (G05F1/02 takes precedence) · CPC title

• H02J3/48

  Controlling the sharing of active power · CPC title

• H02J3/381

  Dispersed generators · CPC title

• H02J3/00

  Circuit arrangements for AC mains or AC distribution networks · CPC title

• H02J2101/30

  Fuel cells · CPC title