Peiton Turbine Needle Control Model Development, Validation, and Governor Designs.
- Resource Type
- Article
- Authors
- Johnson, Randell M.; Chow, Joe H.; Dillon, Michael V.
- Source
- Journal of Dynamic Systems, Measurement, & Control. Jan2013, Vol. 135 Issue 1, p1-10. 10p.
- Subject
- *GAS-turbine automobiles
*AUTOMATIC systems in automobiles
*TRAJECTORY optimization
*AUTOMOBILE speed
*PARAMETER estimation
*DATA analysis
- Language
- ISSN
- 0022-0434
Underspeed needle control of two Peiton turbine hydro units operating in a small power system has caused many incidents of partial system blackouts. Among the causes are con-servative governor designs with regard to small signal stability limits, nonminimum phase power characteristics, and long tunnel-penstock traveling wave effects. A needle control model is developed from "water to wires" and validated for hydro-turbine dy-namics using turbine test data. Model parameters are tuned using a trajectory sensitivity method. In the governor design proposed here the needle regulation gains are distributed into the power and frequency governor loops with a multi-timescale approach. Elements of speed loop gain scheduling and a new inner-loop pressure stabilization circuit are devised to improve the frequency regulation and to damp the traveling wave effects. Sim-ulation studies show the improvements of the proposed control designs. [ABSTRACT FROM AUTHOR]