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Publication Title | PERFORMANCE OF FUZZY LOGIC BASED MICROTURBINE GENERATION SYSTEM CONNECTED TO GRID/ISLANDED MODE

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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.

+ + -

Tempreture controller +

+

X K3

Acceleration controller

Rotor Speed

Tr

Reference Temp

f1(u)

Exhaust system

Fuel & Combustion

+ -

3.3s+1 0.5s

G5 1+sT5

G4

1+sT4

0.8

f2(u)

Ref Speed(pu)

du

+ +

e-sT

G2

1+sT2

K1

K2

Speed Governor

0.01 + -

f3(u)

Turbine dynamics

+ -

dt

L O W

G1 1+sT1

e-sT

+ +

G3

100

s

Ref, Speed

1 JT

Rotor Inertia

f4(u)

1+sT3

PLL

Fuzzy Logic

Figure.1. Fuzzy logic controlled microturbine

Speed

PMSM

Ambient air

Figure.2 Fuzzy logic controlled MTG system

Fuel

Valve

C o m pr e s s o r

Tu r bi n e

Burner

du

dt

0.23

Controller

Rt Lt

Rectifier

L C

Inverter

GRID

Exhaust air

Heat exchanger

Load

42

Image | PERFORMANCE OF FUZZY LOGIC BASED MICROTURBINE GENERATION SYSTEM CONNECTED TO GRID/ISLANDED MODE



international journal systems controlled governor conventional transfer function microturbine predict
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