In conducting the monitoring of current and voltage change towards temperature change and humidity at the output of Solar Power Plant (SPP), the researcher used to conduct measurement manually which was by using multi meter until the measurement obtained depends on the researcher/the operator itself to do the measurement. In this research, the researcher looked for the solution to replace the human roles as the operator of the measurement tool with raspberry pi-based monitoring system and RTC DS3231 to monitor the current, the voltage, the temperature, and the humidity on the surface of PTS to know the current that flows and the change of voltage towards the temperature and the humidity that occur in 24 hours. Based on the result of the research conducted, raspberry pi-based SPP monitoring system and RTC DS3231 could record the current, the voltage, the temperature, and the humidity in real time towards the performance result of SPP into CSV file with recording time once in 10 seconds into Micro SD and the result of that measurement can be accessed through website/internet where Raspberry Pi is functioned as the web server connected to the campus network system.

Maraknya menanam tanaman dengan cara Hidroponik saat ini, banyak digemari karena tidak memerlukan tanah dan lahan yang luas. Dengan menanam dengan cara hidroponik, hasil panen akan lebih cepat namun perlu untuk memperhatikan ketepatan dalam pemberian nutrisi, intensitas cahaya dan suhu sekitar tanaman.  Menanam hidroponik menggunakan metode NFT (Nutrient Film Technique) dibutuhkan aliran air yang tetap terjaga, tujuannya untuk mengalirkan air nutrisi pada akar tanaman. Dalam praktiknya, PLN digunakan untuk menghidupkan pompa air tersebut namun bila suplai energi dari PLN mati akibat gangguan atau kealpaan maka pasokan nutrisi tanaman juga akan ikut terhenti sehingga diperlukan suatu solusi. Dalam penelitian ini, penulis akan membuat desain sistem pembangkit Tenaga Surya (Panel Surya) serta sistem kendali terhadap aliran air yang akan memasok nutrisi ke tanaman hidroponik tersebut.

ABSTRAKTransmisi daya listrik menggunakan saluran udara tegangan tinggi, sehingga sangat rentan terhadap gangguan karena jarak yang sangat jauh. Oleh karena itu, dibutuhkan keandalan sistem proteksi yang tinggi untuk mengamankan saluran udara tersebut. Untuk memenuhi keandalan tersebut, maka pada saluran transmisi perlu dilakukan pemasangan rele jarak. Objek penelitian pada saluran transmisi yang menghubungkan Gardu Induk Garuda Sakti dan Gardu Induk Pasir Putih yang dikelola oleh PT. PLN (Persero) Unit Pelayanan Transmisi Pekanbaru. Saat penelitian ini dilakukan Penghantar 150 kV Garuda Sakti -Pasir Putih belum beroperasi. Dalam penelitian ini dilakukan perhitungan nilai impedansi primer dan impedansi sekunder penghantar 150 kV Garuda Sakti-Pasir Putih dengan panjang penghantar sejauh 31,16 km kemudian setting rele jarak pada zona-1, zona-2, dan zona-3, lalu disimulasikan dengan menggunakan software PSCAD. Berdasarkan analisa yang telah dilakukan diperoleh hasil perhitungan rele jarak di penghantar 150 kV Garuda Sakti-Pasir Putih pada zona-1 sebesar 1,0529 Ohm, zona-2 sebesar 2,2519 Ohm, dan zona-3 sebesar 3,3778 Ohm. Kemudian hasil perhitungan disimulasikan dengan menggunakan software PSCAD dan didapatkan semua gelombang impedansi gangguan berada dalam lingkaran zona yang menandakan rele jarak akan bekerja saat terjadi gangguan. ABSTRACT Power transmission uses high-voltage overhead line, making it extremely susceptible to disturbance because very long distances. Therefore, it needed protection system with high reliability to protect the overhead line transmission. To get the reliability, then on the transmission line needs to be installed distance relay. The object of research on the transmission line that connects the Garuda Sakti Substation and the Pasir PutihSubstation that managed by PT. PLN (Persero) Unit Pelayanan Transmisi Pekanbaru. At the time of this study, Line 150 kV Garuda Sakti -Pasir Putih was not operated. In this research, calculation of primary impedance and secondary impedance of Line150 kV Garuda Sakti -Pasir Putih with as far as 31.16 km, then distance relay setting in zone 1, zone 2, and zone 3, then simulated using PSCAD software. Based on the analysis that has been done obtained distance relay calculation results of Line 150 kV Garuda Sakti -Pasir Putih in zone 1 of 1.0529 Ohm, zone 2 of 2,2519 Ohm, and zone 3 of 3,3778Ohm. Then the calculation result is simulated using PSCAD software and got all impedance faults waves are in zone circle indicating the distance relay will work when disturbance occurs.

This paper discusses the protection system which is the most important part in a power system.

An assistant is a person who is assigned to help with the distribution of paperwork in the office. It requires males and females on staff. The assistant is in charge of assisting the smooth functioning of these activities of the office. It is not easy to find a good assistant. For this election, I could use a set of tools that can assist me in determining whether the recommendations given should be good. The Multi-Criteria Decision-Making method can be used to provide recommendations for the selection. In this method, one of the methods is Multi-factor Evaluation Process (MFEP). Each item will be rated on a set of criteria, and the ratings will be compared for the highest rating possible. Afterward, the result will be ranked the highest. Our findings will appear after we have first considered the highest score due to the order in which the scores are generated. If vou apply the mobile network application method to the service, vou can make a smooth and fast network reception.

People can make solar energy alternative energy by employing solar panels to generate electricity. The utilization of solar energy on a solar panel to generate electricity is affected by the weather and the duration of the radiation, and they will affect the solar panel’s temperature. There are various types of solar panels that can be found on the market today, including Mono-Crystalline and Poly-Crystalline. The difference in the material used needs to be observed in terms of temperature changes in the solar module. Our study’s findings showed that a change in the temperature would impact the solar panel’s output voltage, and the solar panel’s output voltage would change when it was connected to the load although the measured temperatures were almost the same.

Inverter adalah rangkaian atau peralatan yang merubah tegangan DC menjadi tegangan AC sehingga beban – beban AC dapat beroperasi dengan sumber tegangan DC. Komponen utama inverter berupa SCR, transistor atau Mosfet yang kesemuanya adalah komponen semikonduktor yang berfungsi sebagai switch atau saklar. Kondisi ON atau OFF dari saklar ditentukan menggunakan teknik modulasi seperti pembangkit pulsa atau  PWM. Dalam simulasi yang dilakukan menggunakan Proteus ISIS, inverter 1 fasa yang tidak diberi pengendali menghasilkan frekuensi yang tinggi yaitu 2857,14 Hz sehingga berbahaya digunakan pada peralatan listrik tertentu, sedangkan inverter 1 fasa menggunakan kendali untuk membangkitkan pulsa dengan metode PWM menghasilkan frekuensi output sesuai dengan apa yang diharapkan yaitu 50hz dengan delay 10ms waktu perubahan pulsa yang dihasilkan. Pulsa atau PWM dihasilkan oleh Arduino Uno.

Solar energy can be used for alternative energy by the solar panel to produce electrical energy. The use of solar energy on the solar panel to produce electricity is affected by the weather and the radiating duration and then will impact the temperature of the solar panel. The result of the research revealed that the temperature changes that impacted the output voltage from the solar panel will affect output voltage from the solar panel and the output voltage from the solar panel will change when generated even though the measured temperature is almost equal.