Analisis Ketersediaan Sistem Pembangkit Berbasiskan Pembangkit Listrik Tenaga Angin (PLTB) dan Pembangkit Listrik Tenaga Surya (PLTS)

The increasing need for energy and the depletion of petroleum reserves forces people to seek alternative energy sources. Based on the above problems it is necessary to analyse of the availability of generating systems to generate electrical energy pekanbaru city. This study uses a HOMER simulation consisting of Solar Cell (PV), Wind, and Converter. Simulation results of the highest availability of solar energy at 12.00 for 3.86 kw, and wind energy at 16.00 for 3.79 kw.for grouping of the potential winds are in group II that is locations with an average wind speed of 2,5 – 4 m/s. the resulting solar energy can be used for small scale electrical energy conversion system.Design of wind turbine (PLTB) and solar power plants the most optimal based on net present cost of $53.18 and cost of energy (COE) amount 506.$/kWh. In terms of its economy, the greater the installed renewable energy capacity, will decrease fuel USAge levels and cost incurred

Proteksi Panas Lebih pada Generator Berbasiskan Smart Relay

One of abnormal conditions that may happen when operating synchronous generator is overheating at armature winding. Therefore, this condition is needed to overcome to avoid further damage in the generator by designing and implementing smart relay based overheating protection. Temperature at armature winding is as an input of the smart relay where it was measured by using LM35DZ sensor. Magnetic contactor was used as switch, where it will open when the temperature higher then setting value. The overheat protection design was implemented successfully where it can trip (disconnect generator from the system by opening magnetic contactor) when the armature winding temperature is higher than 60° C

Analysis of Configuration and Performance of Arrester for Protecting Substation Against Impulse Lightning Using ATP-EMTP Software

Electrical energy is one of the most important and often used energy in life. Therefore to keep the availability of electricity, it takes a power company that will manage the electricity needs. One of the things that affect to the reliability of the equipment is need to know the configuration of the electrical equipment protective device. As known that transmission line is very vulnerable to lightning strikes that produce a traveling wave. It can enter the substation and make the existing equipment in danger. Based on the problems we need to analyze the configuration and performance of the arrester against the impulse lightning. This study was conducted by simulating lightning strikes on equipment using ATP-EMTP software by varying the strike and the distance of the arrester protection for protected transformer in order to get the correct distance to minimize the optimum voltage. The result of the simulation by varying the distance from 3 m, 6.7 m, 9 m, 15 m, 21 m, 27 m, 28.5 m, the safer distance and the smaller peak voltage which is protected by the arrester to the transformer is 21 meters from the current variation at 10 kA, 30 kA, and 60 kA where the lowest peak voltage of phases A, B, and C are compared with other distances. Then the distance 21 m better than the distance of 6.7 m used by PT.PLN (Persero) Garuda Sakti Substation

Rancang Bangun Aerator Menggunakan Penggerak Motor Satu Fasa dan Sistem Otomatisasi Berbasis Smart Relay

Oxigen in the water is obtained from 2 processes specifically the first is, photosynthesis by water plants and the second is aeration which included in the diffusion process. Aerator is a device that serves to produce oxygen through the diffusion process for the needs of living creatures in the water. Aerators themselves have several types, those are ; gravity aerator (gravity influence), surface aerator (surface), diffusier aerator (mixing), turbine aerator (windmill), and combination. The aerators which designed here are aerator type of turbine (turbine aerator) similar to the aerator used in the research area generally. The purpose in the making of an aerator with this automatic system is to simplify the management and also to reduce the operational costs of the ponds. Aerator is made using 2 pieces of waterwheel with each pin having the same 6 blades with a mill used in ponds at the research site. As the basis of the automation system, the aerator is a smart relay programmed with 2 input which are the light sensor and the sensor temperature parameters in the programming obtained from the results of research on dissolved oxygen levels in the water. From the results of the testing, when dissolved oxygen levels are relatively high in the range of 30mg/L light intensity > 100,000 lux and for temperature 350 C