Integrated Digital Electrohydraulic Control and Protection System for the Induction/Extraction Steam Turbine of S. Quirico Combined Cycle Power Plant

摘要

In the last five years combined cycle power plants have gained an increasing market mainly due to their high efficiency, the short construction period and the relatively low capital investment. In order to operate the plant in safe condition, with a high reliability and low costs both in commissioning and in operation, according to our experience the steam turbine needs a control and protection system with following characteristics: 1) based on digital reliable technology, 2) easy programmable, 3) equipped with a functionally modular software, 4) very precise PID both in transient and in steady state conditions, 5) simple to operate due to the high degree of automation. A typical example of one of authors' company control and protection system for combined cycle steam turbine is the application for S.Quirico cogeneration power plant in Italy ordered by Edison (Italian IPP). The first start-up has been carried out successfully on February 1996, full load has been reached at the beginning of March.