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International Journal of Fuzzy Logic Systems (IJFLS) Vol.2, No.3, July 2012 logic controlled speed governor and conventional transfer function governor for a microturbine to predict the performance of fuzzy logic controller. The microturbine is used as MTG system once it is compared with nominal controller connected to the grid and isolated mode of DG system. The simulation result shows the performance of fuzzy logic controller for different load on MTG system. 2. MICROTURBINE GENERATION (MTG) SYSTEM Microturbines are smaller version of heavy duty gas turbines compact in size and components like compressor, heat exchanger, burner and turbine. Basically there are two types of microturbines, classified based on construction and location of its components. One is a high speed single shaft design with compressor and the turbines are mounted on the same shaft usually the PMSM is use to generate the electrical power. Another is split shaft design that uses a power turbine rotating at 3600 rpm and a conventional generator (usually induction generator or synchronous generator) connected via a gearbox [6]. The microturbine system presented in this paper is based on gas turbine model presented by W I Rowen[5] which was successfully adopter as microturbine generation(MTG) system by Huang Wei[6] connected in parallel to the microgrid, and used as DG system by Gaonkar[7] and Guda S R[8] in isolated mode. The turbine model was proposed by W I Rowen[5] is to be adopted as single shaft microturbine with fuzzy logic speed governor implemented in MATLAB/Simulink is shown in Figure.1, and the same is used as prime mover for the MTG with PMSM and power electronics circuit interfacing system shown in Figure.2. Ref Speed(pu) + - Valve Compressor 0.23 X K3 e-sT du dt K1 K2 L O W Fuel & Combustion G1 G2 e-sT 1+sT2 Speed Governor 0.01 100 s + Rotor Inertia + G3 f3(u) 1+sT3 3.3s+1 0.5s G4 1+sT4 + + G5 1+sT5 0.8 + + - dt Rotor Speed + - Tempreture controller Tr Reference Temp f1(u) Exhaust system f2(u) Acceleration controller du 1 JT Turbine dynamics f4(u) PLL Figure.1. Fuzzy logic controlled microturbine + 1+sT1 Fuel Fuzzy Logic Burner Turbine Ref, Speed Speed PMSM Ambient air Rectifier C Inverter L Controller Rt Lt Figure.2 Fuzzy logic controlled MTG system + + - GRID Exhaust air Heat exchanger Load 42PDF Image | PERFORMANCE OF FUZZY LOGIC BASED MICROTURBINE GENERATION SYSTEM CONNECTED TO GRID/ISLANDED MODE
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