A novel static frequency converter for start-up and shutdown processes of gas turbine power plant units

摘要

A novel Static Frequency Converter (SFC) is designed to be used in start-up and shutdown processes of the synchronous machines of Rey gas turbine power plant in Tehran, Iran. The speed references during start-up and shutdown are chosen in a manner to meet the technical requirements of the gas turbine during these operation modes. The SFC uses a seven-level voltage source inverter. Due to its control and modulation strategy, the inverter operates at a very low effective switching frequency. In this paper, active rectifiers are used to connect the SFC to the alternating current network and isolating transformer which causes the SFC to operate in both start-up and shutdown processes. Simulation results show successful start-up and shutdown processes of the gas turbine units. The results of this study are submitted to Rey Power Generation Management Co. and if the budget for construction of the proposed SFC is provided, the proposed system will be experimentally implemented. Copyright © 2015 John Wiley & Sons, Ltd.