METHOD AND SYSTEM FOR RAPID MODELING AND VERIFICATION OF EXCITATION SYSTEMS FOR SYNCHRONOUS GENERATORS

• US 20110125449A1
• Filed: 01/31/2011
• Published: 05/26/2011
• 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
• Granted Patent: US 8,131,383 B2
• Time in Patent Office: Days
• US Class Current: 702/109
• 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 pertubated signal, where the signal response data is collected from a plurality of signal points in the exciter system, and

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

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:

pertubating 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 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 for the synchronous generator system and the selected signal output is different from the signal points from which the data is collected, and

predicting a signal output at the selected signal output using a transfer function and a known input signal to be applied to the exciter system.

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.