AC Excitation and Speed Governing Coordination Control of Impulse Hydroelectric Generating Unit and its Simulation

Abstract:

Aiming at the AC excitation control and speed governing of high water-head impulse hydroelectric generating unit, and in order to realize unit optimization adjustment and obtain desirable comprehensive control performance, a variable structure and variable parameter coordination control idea, including designing coordination control module and constructing coordination control mechanism, is proposed. By the management of coordination control module, the dynamic switching between no load operation and grid-connected generation control, and the dynamic matching between AC excitation control and rotational speed control can be realized. Thanks to the dynamic coordination control of AC excitation and hydraulic governing, on the one hand, power regulation is rapid and precise, improving stability of power system; on the other hand, unit nozzle twitching is reduced, decreasing difficulty in speed governing, and realizing maximum efficiency tracking control. The simulation of grid-connected operation shows that: AC excitation and coordination control strategy can make doubly-fed asynchronous generating unit acquire much better control performance than conventional unit.

• Periodical: Applied Mechanics and Materials (Volumes 397-400)
• Pages: 1930-1934
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.397-400.1930
• Online since: September 2013
• Authors: Xiao Qian Hu, Wei Liu, Lian Zhang
• Keywords: Ac Excitation, Coordination Control, Impulse Hydroelectric Generating Unit, Speed Governing

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