STUDY OF POWER QUALITY IN MICROGRID BASED ON SOLAR/MICRO-HYDRO/WIND POWER PLANT FOR ISOLATED AREA

• Main Author: Sahidin, Dwi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/63550
• Institution: Institut Teknologi Bandung

Global population growth is increasing from year to year. It also impacts increasing energy consumption, including in the power generation sector. Power plants are mostly still based on fossil energy and produce ever-increasing greenhouse gas emissions. The commitment of each country in the Paris Agreement to encourage the use of power plants based on renewable energy to produce cleaner and more environmentally friendly energy, including Indonesia. Yet renewable energy generation faces challenges such as the seasonal and intermittent nature of renewable energy, which has the potential to yield power quality problems. Furthermore, the increasing application of power electronics loads on the consumer side and power electronics on the source side of renewable energy generation lead to serious problems of harmonics in the power system. The aim of this research especially studies the power quality aspect of the microgrid sourced from three types of renewable energy sources for the isolated area, i.e., solar PV, micro-hydro, and wind energy plant. Passive filters LC and LCL are applied to the solar PV and wind energy systems, respectively, to reduce harmonics appearing from power electronics. The battery system is applied to the solar power plant to compensate for the voltage fluctuations generated from renewable energy power plants. The microgrid system utilized as a case study is based on the development of an off-grid power system in Teluk Sumbang Village, East Kalimantan, Indonesia, which is sourced from a 414 kWp solar PV plant, 30 kW micro-hydro plant, and 550 kWh battery system. The method to analyze power quality is using the MATLAB/Simulink environment. Analysis of the Total Harmonic Distortion (THD) index is carried out through Fast Fourier Transform (FFT). Furthermore, transient overvoltage phenomenon is observed using simulation of three-phase ground faults. The overall results of the power quality analysis are compared with the IEEE and IEC standards.