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

• US 20070260334A1
• Filed: 05/04/2006
• Published: 11/08/2007
• 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, Pearson, William, Zeleznik, James
• Granted Patent: US 7,881,814 B2
• Time in Patent Office: Days
• 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 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;

collecting data from the excitation system;

determining parameter settings for the selected standard model using the collected data;

verifying the selected standard model with the 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 the parameter settings, and

generating a report of the verified selected standard model with the 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 1 wherein a maintenance computer determines the parameter settings for the selected standard 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 parameter settings is performed at a site having the excitation system and generator.

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

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;

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

collecting data from the excitation system during operation of the excitation system;

determining substitute parameter settings for the selected standard model using the collected data and the onsite maintenance computer;

populating the selected standard model with the substitute parameter settings;

verifying the selected standard model with the 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 the parameter settings, and

generating a report of the verified selected standard model with the 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 tool to tailor the system models;

a mathematical excitation system model stored on the maintenance computer and selected to model the excitation system;

data collected from the excitation system and used by the maintenance computer to tailor the selected mathematical excitation system model;

parameter settings determined by the maintenance computer for the selected model using the collected data;

a verified selected model with the parameter settings stored in the maintenance computer.

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

13. A method as in claim 11 wherein the excitation system models are detailed representations of the exciter controller that can be mathematically reduce to IEEE standard excitation system models

14. A method as in claim 11 wherein the determination of parameter settings is performed proximate to the excitation system.

15. A system for collecting frequency response data from a generator system comprising:

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.

16. A system as in claim 15 wherein the perturbing signal is a pseudo random binary sequence.

17. A system as in claim 15 wherein the perturbing signal covers a range of 0 Hz to 50 Hz, wherein the perturbing signal is zero when at zero Hz.

18. A system as in claim 15 wherein the data collection is performed during application of the perturbing signal to a single input of the exciter system.

19. A system as in claim 15 wherein the data collected from a multiplicity of pairs of signal points in the exciter system can be use to determine the frequency response throughout the system

20. A system as in claim 15 further comprising sampling the data being collected.