DYNAMIC SIMULATION OF GAS-TURBINE GENERATING-UNIT

Gas-turbine generators are often connected to weak supply systems or even used in isolated operation. System disturbances arising from fault or load fluctuation could cause these generators to become unstable. There is an increasing demand for an accurate model of such a system, to enable the system response to be investigated and improvement to the associated control system to be made. A mathematical model describing the dynamic behaviour of a gas-turbine generator set, sufficiently accurate for the above application and yet efficient in computer usage is presented. A full-scale site test on a 13 MW gas-turbine generator has been conducted and the recorded results are generally in good agreement with the computed results.