Abstract
Frequency regulation is very important for microhydro power system. Flow control valve (FCV) and electronic load controller (ELC) are common control systems developed for micro hydro power plant (MHPP) with synchronous generator. However, these control systems each other has a drawback in term of frequency response or harmonics issues. This paper proposes an integrate control system, in which FCV and ELC system work together for MHPP in order to obtain a better performance in frequency response and total harmonic distortion (THD). PID and PI controllers were used for FCV and ELC, respectively. The integrated control method influences on the MHPP performance was verified by MATLAB simulation, when the load reduced 10KW in two sequences time. Results of the simulation confirm that the integration of FCV and ELC offered a better trade-off between frequency response and THD issues for MHPP, which cannot be solved by standalone FCV or ELC. By integrating both control systems, they gave the best values for frequency response and THD in around 1.4071 second and 8.57%, respectively.
Highlights
The power system should be able to provide power to consumers load with a constant frequency [1]
This paper proposes an integrate control system, in which flow control valve (FCV) and electronic load controller (ELC) system work together for micro hydro power plant (MHPP) in order to obtain a better performance in frequency response and total harmonic distortion (THD)
Results of the simulation confirm that the integration of FCV and ELC offered a better trade-off between frequency response and THD issues for MHPP, which cannot be solved by standalone FCV or ELC
Summary
The power system should be able to provide power to consumers load with a constant frequency [1]. Governor or flow control valve (FCV) is a mechanical control equipment, where in the process of control frequency is more emphasis on the regulation of the amount primary energy into the turbine [5]. This power system has a drawback due to inability when sudden load changes occur. In terms of power savings this equipment is inefficient due to the excess of power is expelled to the dump load and mostly run into overheat on dump load [7] and ELC with trial component has a high level of harmonics on MHPP [8]. The system layout and control scheme integrates of FCV and ELC are developed in MATLAB® Simulink 2014b environment
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