Gas turbine under frequency response improvement system and method

摘要

A system and method is provided that improves the under frequency response of gas turbines by providing a fast-response power augmentation system. The system includes a tank storing a blended mixture of motive fuel such as ethanol or methanol and demineralized water in a predetermined ratio that is provided as a diluent to be injected into the compressor bellmouth, the Compressor Discharge Chamber (CDC), and/or the combustion system via one to three dedicated circuits. To achieve the instantaneous injection of the diluent at the correct pressure and for the appropriate duration to meet the needs of the gas turbine Grid compliance mandate, an accumulator is used as the motive force to drive the augmentation fluid in the dedicated circuits. The injected diluent is microprocessor controlled to either be simultaneous into all three circuits or is sequenced based on a determination of the best turbine control and performance.

主权项

1. A turbine control system that controls provision of fuel and air to a turbine engine and/or an air compressor that provides compressed air to said turbine engine, said turbine engine being connected to a power grid to provide generated power thereto, said system comprising:
at least one sensor that monitors frequency fluctuations of said power grid from a standardized grid frequency value; an accumulator that stores a mixture of water and a motive fuel under pressure; and a controller that adjusts fuel and air flow to the turbine engine in response to detected grid frequency fluctuations, said controller providing the pressurized mixture of water and motive fuel to at least said compressor to augment mass flow to said turbine engine when said at least one sensor detects an under frequency condition of said power grid.