Method and system for rapid modeling and verification of excitation systems for synchronous generators

• US 8,131,383 B2
• Filed: 01/31/2011
• Issued: 03/06/2012
• Est. Priority Date: 05/04/2006
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Pearson, William Robert, Monclova, Pedro, Zeleznik, James William
• Primary Examiner(s): Decady, Albert
• Assistant Examiner(s): Chang, Sunray
• Application Number:
  US13/017,262
• Publication Number:
  US 20110125449A1
• Time in Patent Office: 400 Days
• Field of Search: 700/29
• US Class Current: 700/29
• CPC Class Codes: G05B 17/02 electric
• CPC Class Codes: G06F 30/367 Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods

Abstract

A system for collecting frequency response data from a generator system including: applying a perturbing signal to a signal input of an exciter system for a synchronous generator; collecting data regarding signal output from a multiplicity of signal points in the exciter system; transforming the collected data to predict a signal response at a signal output in the system different from the signal points used for collecting data, and analyzing the frequency response of the system.

Claims

1. A method for collecting and analyzing frequency response data from a synchronous generator comprising:

perturbing a signal applied to a signal input of an exciter system of the synchronous generator;

collecting signal response data generated by the synchronous generator in response to the perturbed signal, where the signal response data is collected from a plurality of signal points in the exciter system;

deriving a transfer function using the signal response data wherein the transfer function generates a predicted signal response at a signal output point for the synchronous generator system and the signal output point is different from the signal output points from which the data is collected;

applying an input signal to the transfer function to generate the predicted signal output corresponding to the signal output point, and

applying the predicted signal output to model an operation of the synchronous generator.

2. The method as in claim 1 wherein the perturbing signal is a pseudo random binary sequence.

3. The method as in claim 1 wherein the perturbing signal covers a range of 0 Hz to 50 Hz, wherein the perturbing signal is zero when at zero Hz.

4. The method as in claim 1 wherein the data collection is performed during application of the perturbing signal to a single input of the exciter system.

5. The method as in claim 1 wherein the data is collected from a multiplicity of pairs of the signal points in the exciter system.

6. The method as in claim 1 further comprising sampling the data being collected.

7. The method as in claim 1 wherein the signal response data is collected at the same time from the plurality of signal points.

8. A method to predict a response to an input signal by a synchronous generator comprising:

a perturbing an input signal applied to a signal input of an exciter system for the synchronous generator;

collecting signal response data generated by the exciter system in response to the perturbation of the input signal, wherein the signal response is collected from a plurality of signal output points in the exciter system;

determining a transfer function based on the collected signal response data, wherein the transfer function generates a predicted signal output at a selected signal output point for the synchronous generator system and the selected signal output point is different from the plurality of signal input points from which the data is collected;

generating a signal output corresponding to the selected signal output point using the transfer function and a known input signal to be applied to the transfer function, and

applying the signal output as a predicted response of the exciter system to model an operation of the synchronous generator.

9. The method as in claim 8 wherein the perturbing signal is a pseudo random binary sequence.

10. The method as in claim 8 wherein the perturbing signal is at various frequencies in a range of 0 Hz to 50 Hz.

11. The method as in claim 8 wherein the data collection is performed during application of the perturbing signal to a single input of the exciter system.

12. The method as in claim 8 wherein the data is collected from a multiplicity of pairs of signal points in the exciter system.

13. The method as in claim 8 further comprising repeatedly sampling the data in the step of collecting the signal response data.

14. The method as in claim 8 wherein the signal response data is collected simultaneously from the plurality of signal points.