Muhammad Fahmi Hakim

Minimnya pencahayaan di wilayah RT. 02 RW. 20 Kelurahan Purwantoro, Kecamatan Blimbing, Kota Malang, menyebabkan risiko kecelakaan dan tindak kriminalitas di malam hari. Program pengabdian ini bertujuan mengatasi masalah tersebut dengan penerapan smart lighting system yang hemat energi. Metode yang digunakan melibatkan pemasangan sistem pencahayaan di empat titik strategis menggunakan pendekatan community-based, di mana warga berpartisipasi dalam instalasi dan pemeliharaan. Survei awal dilakukan untuk mengidentifikasi kebutuhan, dilanjutkan dengan pelatihan penggunaan teknologi kepada warga. Hasil menunjukkan peningkatan keamanan dan kenyamanan warga, serta pengurangan konsumsi energi listrik. Teknologi smart lighting yang diterapkan terbukti efisien, otomatis, dan meningkatkan partisipasi warga dalam merawat fasilitas umum. Program ini juga berhasil memperluas pemahaman masyarakat tentang teknologi hemat energi. Implikasi program menunjukkan pentingnya penerapan teknologi tepat guna untuk meningkatkan kesejahteraan masyarakat, dan berpotensi dikembangkan lebih lanjut dengan integrasi energi terbarukan seperti panel surya.

In order to meet the needs of electrical energy, PT X. receives electricity supply from PLN as the main source while the generator with a total capacity of 2.228,5 KVA as a backup electricity supply. PT X plans to procure a double feeder as a backup power supply to replace the generator set in the hope of getting a more economical backup power supply. So, the purpose of this study are analyzing the planning and technical calculations for the construction of a premium feeder, analyzing the comparisono f the use of generator setting with double feeder from economic point of view, and analyzing the comparison of the efficiency of using generator setting with the use double feeder. The method used in this study was the IRR (Internal Rate of Return) method to determine the value of the rate of return on investment while the SAIDI – SAIFI data was used to determine the reability of the feeder. The result of this research is the double feeder using MVTIC type construction. For Rp/kWh, the use of premium service, namely B3/TM customers is Rp. 1.162,78 per kWh and B2/TM Rp. 1.574,7 per kWh, while Rp/kWh generator setting is Rp. 4.003 per kWh. Meanwhile the double feeder IRR values is 44% and the generator setting is 24%. So, it is more efficient to use PLN premium service.

At Electrical Engineering Department of Politeknik Negeri Malang, there is an EBT learning module in the form of solar panel with small capacity, namely 80 Watts. The only load that can be supplied is DC load because there isn’t installed inverter. Therefore, it is necessary to determine the inverter specifications to be installed in small-scale solar system. This research aims to determine the specifications and test the performance of a 500 W inverter integrated with a 50 Wp solar system. Also analyze power quality parameters and efficiency when connected to various load. The test method is no-load and load testing with the parameters measured including current, voltage, power, frequency and THD. Analysis was also carried out on the correlation between efficiency and loading and inverter pins with THDV and THDI. In the no-load test, the inverter output voltage waveform was obtained as a pure sine wave with a frequency of 50.10 Hz. In testing the LED and LHE loads, it was found that the inverter was good for use when the load was 50-80% of its capacity. The lowest THDV value is at a Pin value of 26 W, namely a THDV value of 0.009%. The highest THDV on the Pin is 130 W with THDV value of 1.9%. The lowest THDI value is at Pin 9.75 W, namely 27.6%. The highest THDI value on the 130 W Pin is 80.9%. The THD limit is still within the IEEE standard limit, namely 5% - 10%.

The actions for electricity consumption more efficiently is reducing the amount of electricity consumption of renewable and non renewable energy for human living sustainability or we can called energy conservation. Energy audit purposed to the energy utilization evaluation progress, is still infrequently applied in Indonesia, especially in huge building. The analyzing result of A building in the Dr. Radjiman Wediodiningrat Asylum, the first value audit of Energy Use Intensity (EUI) is 21,944 kwh/m²/year it was include the criteria of efficient. This EUI value is below EUI research that was issued by ASEAN-USAID in 1992 and the EUI value average of hospital in Korea, while detailed audit obtained energy value of EUI is 23,213 kWh/m²/year is included to the criteria of efficient. The THDi value in electricity system is IR= 33,2%, IS=24,48%, IT= 34,85% and IN=122,96%, the THDi value is not complied with IEEE 519-2014 permission which is the value is I_SC/I_L> 1000 has restraint value by 20%. Whereas the THDv value in electricity system is VR-S= 2,04%, VS-T= 2,11%, VT-R= 1,97%, VR-N= 3,83%, VS-N= 3,69%, VT-N= 3,73% and VL-L= 2,04% and VL-N= 3,75%, the value of THDv is complied the permissiod by IEEE 519-2014 with Voltage system of identification by 0,4 kV, therefore the limit value of THDV which permitted is 8%.

In the area around PPYD Al Ikhlas Singosari, Malang, there is a river with a fast enough flow that can be used as a hydroelectric power plant as estimated. After investigation, it was found that the potential electrical power that could be generated was 1,118.56 Watts so it was classified as a pico hydro power plant. Therefore, in this research, one of the main parts of the pico hydro power plant, namely the turbine, was designed. The type of turbine designed is a crossflow turbine with an outer diameter of 75 cm and an inner diameter of 3 cm, the width of the runner blades is 40 cm, the distance between the blades is 36 cm, the radius of curvature of the blades 33 cm, the number of 10 blades can produce 843.74 watts of power with a turbine efficiency of 75.43%. So, it can be concluded that the crossflow turbine has good efficiency.

Based on observations made by PT. PLN (Persero), Plumpang Feeder has a large voltage drop and high-power loss. To analyze in more detail, a simulation was carried out using ETAP (Electrical Transient Analysis Program) software. The results of the ETAP simulation, the Plumpang Feeder has end voltage of 19,083 V from a nominal voltage of 20,000 V. The voltage drop is -4.58% and the power loss is 594.7 kW or -1122kVAR. To overcome this problem, a load split or breaking method is carried out by moving some of the load of the Plumpang Feeder to the New Plumpang Feeder so that the total load current of the Plumpang Feeder will decrease and the voltage drop and power loss will also decrease. The Load Breaking Method is carried out at each Cut Off (CO) Branch where the loads to be moved. After the Load Breaking Method is applied, based on ETAP simulation results, the end voltage at Plumpang Feeder increased from 19.083 V to 19.307 V or have a change in voltage drop from -4.58% to -3.47%. The power loss decreased from 594.7kW to 92.4kW or experienced a change in power loss from 0.0129% to 0.0043%.

Segoromadu Substation has two busbars, namely busbar A and busbar B. Busbar A which has nominal voltage of 150 kV has reached a voltage value of 129.38 kV or experienced voltage drop of 13.75%. The percentage of this voltage drop exceeds a predetermined standard. Therefore, it is necessary to design a shunt capacitor which is then modeled and simulated. Based on calculation and analysis result, capacity of shunt capacitor that should be installed on Bus A is 50 MVAR. After the shunt capacitor was installed, based on simulation, there was an increase of 4.87 kV so the voltage afterward became 139.67 kV or only experienced a voltage drop of 3.19%. So, by installing a shunt capacitor with capacity of 50 MVAR, it can increase busbar voltage of the substation. The shunt capacitor also increases the value of reactive power and current flowing to the busbar.

A cement factory, namely PT Semen Imasco Asiatic, requires a large supply of power for production. However, in the area where the cement factory was established, namely Puger District, there was no electricity capable of supplying it, so PLN built the Puger substation. In the original plan, the transmission line will be built directly from GI Tanggul to GI Puger. However, because the plant must operate immediately, the electricity supply is taken from the existing Tanggul substation-Jember substation transmission line using the T-Junction configuration. In this paper, an analysis of the power flow of the Paiton-Grati subsystem will be carried out when the power supply from Tanggul Substation to Puger Substation is passed through the T-Junction configuration or when the transmission line is connected from the Tanggul Substation to the Puger Substation directly. The result of this research is that there is no significant difference between the two conditions in power losses, voltage drop, current, and power factor parameter so that the T-Junction configuration is quite feasible to use even though it is temporary.

Installation of spotlights and LED strips with automatic operation at the entrance gate of the SPI Cluster RT.10 RW.04 Bandungrejosari Village, Sukun District Malang City is based on the absence of lighting contained in the writing of the Sukun Pondok Indah Cluster (SPI) so that many guests or couriers who are not aware of the housing. With the installation of spotlights and LED strips, it is hoped that the writing on the gate of the Sukun Pondok Indah cluster will be bright and visible so that guests or couriers can immediately know about the housing. Then people can see when installing spotlights and LED strips with automatic operation, they hope that people can install lighting installations automatically in their respective homes correctly and according to standards. Then people do not need to operate the ON / OFF spotlights and LED strip every day. That way, the benefits of installing spotlights and LED strips with automatic operation, people don't need to ON / OFF the lighting every time.