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

• US 7,881,814 B2
• Filed: 05/04/2006
• Issued: 02/01/2011
• Est. Priority Date: 05/04/2006
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (GE Vernova, Inc.)
• Original Assignee: General Electric Company
• Inventors: Monclova, Pedro, Zeleznik, James William, Pearson, William Robert
• Primary Examiner(s): DeCady; Albert
• Assistant Examiner(s): Chang; Sunray R
• Application Number:
  US11/381,592
• Publication Number:
  US 20070260334A1
• Time in Patent Office: 1,734 Days
• Field of Search: 700/29, 700/34, 700/274, 703/13, 703/18
• 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 method for modeling an excitation system for a synchronous electrical power generator including: selecting a standard mathematical excitation system model from a plurality of standard excitation system models stored electronically; wherein the selected standard model is selected based on a similarity to the excitation system and can be an IEEE standard model; collecting data from the excitation system; determining parameter settings for the selected standard model using first pre-calculated and then collected (measured) data; verifying the selected standard model with tailored parameter settings by comparing an output of the model to a corresponding output of the excitation system; storing electronically the verified selected standard model with tailored settings; generating a report of the verified selected standard model with the tailored settings; performing rapidly and automatically model generation from a maintenance computer proximate to the excitation system; performing rapidly and automatically model generation without the need for system experts or extra equipment; and providing means to repeat test an operating excitation system at low cost and risk.

Claims

1. A method for modeling an excitation system for a synchronous electrical power generator comprising:

selecting a standard exciter model to model the excitation system, wherein the standard exciter model is selected from a plurality of standard excitation system models stored electronically;

wherein the selected standard exciter model is selected based on a similarity to the excitation system;

collecting data from the excitation system by collecting frequency response data from the generator resulting from a perturbing signal applied to the excitation system;

determining model parameter settings for the selected standard exciter model using the frequency response data;

verifying the selected standard exciter model with the determined model parameter settings by comparing an output of the selected standard exciter model with the determined model parameter settings to a corresponding output of the excitation system;

storing electronically the verified selected standard exciter model with the determined model parameter settings, and

generating a report of the verified selected standard exciter model with the determined model parameter settings.

2. A method as in claim 1 wherein the standard excitation system models are IEEE excitation system models.

3. A method as in claim 1 wherein the standard excitation system models are stored electronically in a maintenance computer proximate to the excitation system.

4. A method as in claim 3 wherein the maintenance computer determines the parameter settings for the selected standard exciter model.

5. A method as in claim 1 wherein the determination of model parameter settings is performed proximate to the excitation system.

6. A method as in claim 1 wherein the determination of model parameter settings is performed at a site having the excitation system and the electrical power generator.

7. A method for modeling an excitation system for a synchronous electrical power generator having an excitation system, the method comprising:

selecting a standard mathematical excitation system model to model the excitation system from a plurality of standard excitation system models stored electronically;

wherein the selected standard mathematical excitation system model is selected based on a similarity to the excitation system;

initially determining parameter settings for the selected standard mathematical excitation system model using precalculated data for the excitation system;

collecting frequency response data from the generator during operation of the excitation system using the selected mathematical excitation system model and the initially determined parameter settings and applying a perturbing signal to the excitation system;

determining substitute parameter settings for the selected standard mathematical excitation system model using the collected frequency response data;

populating the selected standard mathematical excitation system model with the substitute parameter settings which replace, at least in part, the initially determined parameter settings;

verifying the selected standard mathematical excitation system model with the substitute parameter settings by comparing an output of the model with the substitute parameter settings to a corresponding output of the excitation system;

storing electronically the verified selected standard model with the substitute parameter settings, and

generating a report of the verified selected standard model with the substitute parameter settings.

8. A method as in claim 7 wherein the standard excitation system models are IEEE excitation system models.

9. A method as in claim 7 wherein the standard excitation system models are stored electronically in a maintenance computer proximate to the excitation system.

10. A method as in claim 7 wherein the determination of parameter settings is performed proximate to the excitation system.

11. A system for modeling an excitation system comprising:

an excitation controller for a synchronous electrical power generator capable of data collection;

a maintenance computer system having stored in data storage a plurality of excitation system models and a software program to tailor the excitation system models, wherein the software program causes the maintenance computer system to perform the following tasks;

store a selected mathematical excitation system model which is selected from the plurality of excitation system models and models the excitation system;

collect frequency response data from the generator and use the collected frequency response data to tailor the selected mathematical excitation system model;

determine and store parameter settings for the selected mathematical excitation system model using the collected frequency response data; and

verify the selected mathematical excitation system model with the determined parameter.

12. A system as in claim 11 wherein the excitation system models are IEEE standard excitation system models.

13. A system as in claim 11 wherein the excitation system models are detailed representations of the exciter.

14. A system as in claim 11 wherein the maintenance computer system is proximate to the excitation system.