The need for electricity supply in the community and industry is increasing over time, it is necessary to provide energy and a safe and reliable electricity distribution system, which can minimize blackouts so as to maintain customer satisfaction. One way to increase reliability and minimize blackouts is through a network maneuvering process. This study calculates the magnitude of the power loss value on the power line in the feeder that maneuvers the Singa feeder with the aim of knowing the value of power loss that occurs during the maneuver so that network maneuvering activities on the Singa feeder become more optimal. The Singa feeder can be maneuvered by two feeders, namely the Kijang feeder and the Kancil feeder.  Based on SPLN 72: 1987, the standard maximum value for medium-voltage

One of the important components in the high voltage overhead lines placed on the transmission tower is an insulator. Insulators that are installed outdoor will be exposed to the environment directly. Due to environmental conditions and pollutants attached to the surface, leakage currents can flow on the surface of the insulator. Large leakage currents can damage the surface of the insulator and cause losses in the form of heat and even cause flashover. This paper provides an alternative way to prevent early flashover by detecting the severity of the insulator surface based on harmonic measurements of leakage currents. Insulator performance mainly depends on the conductivity of the surface layer being polluted or by generating pollutants via the equivalent salt deposit density (ESDD). The leakage currents were evaluated at different ESDD levels as deposits of very light, light, moderate, and heavy NaCl salt pollution on a 20 kV outdoor polymer insulators. From the experiments, it can be concluded that: i. The leakage current that occurs when the surface of the insulator is very lightly polluted has an unsymmetrical waveform that is distorted and leads to a positive with a large THD; ii. The magnitude of the leakage current with the surface of the insulator is polluted, which leads to greater weight, but the harmonic distortion and THD are getting smaller with the waveform of the leakage current signal leading to a sinusoidal waveform.

ABSTRAKPoliteknik Pariwisata Palembang dan Bowling Jakabaring Sport City merupakan pelanggan premium PT. PLN (Persero) UP3 Palembang. Sebagai pelanggan premium sudah seharusnya kedua pelanggan ini mendapatkan keandalan jaringan listrik. Pada awalnya Politeknik Pariwisata Palembang termasuk dalam kawasan Zero Down Time untuk mengamankan suplai kelistrikan Jakabaring Sport City pada perhelatan Asian Games tahun 2018. Setelah berakhirnya perhelatan Asian Games 2018, beban pada trafo daya-2 di Gardu Induk New Jakabaring turun dibawah 50%. Untuk membebani trafo daya tersebut maka PT. PLN (persero) UP3 Palembang menambahkan jaringan existing pada Gardu Hubung Politeknik Pariwisata melalui Saluran Udara Tegangan Menengah Pertahanan Gardu Hubung 8 Plaju. Perubahan konfigurasi distribusi listrik ini harusnya diimbangi dengan koordinasi proteksi yang tepat agar dapat menjaga keandalan supplai listrik, namun kenyataanya di lapangan berbeda, terhitung sejak bulan April 2019, penyulang Kalingga sudah mengalami 88 kali padam dengan rata-rata padam 656 menit. Dari sisi ekonomis, pemadaman yang meluas merugikan PT. PLN (Persero) karena ENS (Energy Not Sold) serta PLN juga harus membayar kompensasi kepada golongan pelanggan premium karena gagal memenuhi komitmennya dalam memberikan pelayanan listrik andal sesuai dengan perjanjian yang telah disepakati.   ABSTRACTPoliteknik Pariwisata Palembang and Bowling Jakabaring Sport City is a premium customer of PT. PLN (Persero) UP3 Palembang. As premium customers, both of these customers should get the reliability of the power grid.Initially, Politeknik Pariwisata Palembang was included in the Zero Down Time area to secure the electricity supply of Jakabaring Sport City at the Asian Games in 2018. After the end of the 2018 Asian Games, the load on the transformer power-2 at the New Jakabaring Substation dropped below 50%. To overload the power transformer, PT. PLN (persero) UP3 Palembang added an existing network at the Politeknik Pariwisata Link Substation through the Medium Voltage Air Line Pertahanan of 8 Plaju Substation. This change in electricity distribution configuration should be balanced with proper protection coordination in order to maintain the reliability of the electric supply, but the reality in the field is different, starting from April 2019, Kalingga refiners have experienced 88 outages with an average outage of 656 minutes. From an economic point of effect, widespread blackouts harm PT. PLN (Persero) UP3 because ENS (Energy Not Sold) and PLN also have to pay compensation to premium customers for failing to meet their commitments in providing reliable electricity services in accordance with agreed agreements.

Abstract  The Kenten substation is part of the unitary distribution of electricity transmission where there are equipment such as switchgear, transformers, protection equipment, and control equipment. The Kenten substation functions as a receiver for supply from high voltage to the distribution medium voltage system to be distributed to consumers. An electric power system can experience disturbances from inside or outside the substation, including damage to the generator, broken conductors, short circuit disturbances due to lightning strikes. Therefore, the electric power system has safety equipment to secure the equipment from interference and avoid damage. With the protection system does not hinder the distribution of electric power to the load. Based on the data received, there have been several disturbances to the feeder, including in March 2021 there has been a short-circuit fault in the volvo feeder in the electrical system of PT. PLN (Persero) substation Kenten UPT Palembang Short-circuit faults of these phases can result in a transformer that results in blackouts throughout the feeder connected to the transformer. Disturbances that occur in the electrical system of the Kenten Substation, especially in this feeder, make the OCR protection system on the feeder work to protect the equipment at the substation from damage.

Controlling the speed of a DC motor in proportion to changes in temperature of a K-type thermocouple uses a Programmable Logic Controller and the Human Machine Interface  to enable monitoring of the temperature and speed of the Direct Current  motor from changes in the thermocouple sensor as input in the form of temperature data reduced to analog. to digital converter  in the form of digital data and controls the speed of the DC motor by adjusting the Pulse Width Modulation. DC motor speed control for temperature changes from a thermocouple sensor with a control system using a Programmable Logic Controller and displayed on the Human Machine Interface. In this test, only heating the sensor at a temperature of 30 oC to 100 oC and the speed of the DC motor where the temperature is greater, the PWM value makes the DC motor rotate faster. In controlling DC motors with PWM using a frequency of 10 Hz to get a PWM value of 0% - <54% the motor will rotate at low speed. PWM  54% - <84%, the motor will rotate at medium speed. PWM 84% - >90%, the motor will rotate at high speed