Nowadays renewable energy is becoming more and more popular as it is a sustainable and environment friendly source of energy. Small-scale hydropower plant is one of the most cost effective and reliable energy technologies to be considered for providing clean electricity generation. Any mismatch between generation and demand causes the system frequency to deviate from its nominal value. Thus high frequency deviation may lead to system collapse. The frequencies of small hydropower plants are controlled by conventional mechanical governors. Unfortunately, these governors are expensive, complex and slow in response. In this Paper, simple, less cost and fast response fuzzy logic based PI controller of frequency for small hydropower plant is modeled, designed and simulated by Matlab/Simulink. The frequency controller controls the flow rate of water by acting on stepper motor and keeps the frequency of the small hydropower system nearly constant. The PM stepper motor is used to rotate a spear valve which in turn controls the flow of water into the turbine of a small hydropower plant. It is observed from the simulation results that the average overshoot for 35% load change is 4.09% and settling time is 9.49 seconds. Moreover, for 75% load change, the overshoot is only 6.06% and the settling time is 11.95 seconds. The simulation result demonstrates that transient and steady state performances are enhanced when fuzzy PI controller is employed.
FUZZY LOGIC BASED PROPORTIONAL INTEGRAL CONTROLLER OF FREQUENCY FOR SMALL HYDROPOWER PLANT
2019-06-10
doi:10.20372/nadre/3948
Theses
Electronic Resource
English
DDC: | 629 |
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