Construction Technologies and Architecture Vol. 14

Abstract: One of the key factors driving global interest in generating large quantities of electricity from renewable energy sources is global warming. As a consequence of advancements in solar cell fabrication, wind turbine technology, and converter technology, PV solar and Wind Turbine Generators (WTG) have emerged as the most promising renewable energy sources for large-scale electricity generation. If the current commissioning rate continues, the capacity of PV and Wind Turbine Generators will necessitate modifications to various aspects of the power system and may impact system stability. This research broadly examines technical challenges, particularly transient stability issues, associated with the large-scale integration of PV and Wind Turbine Generators into the power system. Furthermore, this research also reviews dynamic models by applying three-phase short-circuit connections at critical network points and observes their influence on transient stability of the system. Simulations are conducted using ETAP 19.0 software, which was employed to model the 20 kV distribution system network (Lamno and Calang) from the Main Substation of Muelaboh City Area. Finally, this paper summarizes research findings regarding techniques and solutions to address transient stability issues in the electric power system associated with the large-scale integration of PV and WTG into the distribution system.

Abstract: This research focuses on regulating the speed of a single-phase induction motor in making biopellets from empty palm oil bunches. Bio-pellets are a renewable energy fuel source. Power consumption in induction motors at constant speed is greater and this can cause waste of electrical energy. To overcome this problem, we need a way to save electrical energy, especially in operating electric motors. One effort to save electrical energy when operating an induction motor is to use an inverter. From the research results, it is known that the power of an induction motor operated without using an inverter is 0.610 kW with electrical energy of 0.603 kWh and using an inverter is 0.376 kW with electrical energy of 0.396 kWh. The electrical energy use of a single phase induction motor using an inverter is 0.207 kWh lower than without an inverter with electrical energy savings of 34.32% or Rp. 8,395.92 in one month.