Chandra Wiharya

Battery management systems are essential in electric vehicles and renewable energy applications, especially in terms of ensuring optimal battery health and performance and regarding the state of charge (SOC) in batteries consisting of many cells. The lifetime and efficiency of the battery depend on the accuracy of the SOC parameter estimation. Moreover, systems that apply active balancing technology are able to move cells with high SOC data to cells with low SOC. Many methods have been developed, but their long execution time makes them less optimal when applied. High-speed SOC estimation is required in active balancing technology, in addition to high accuracy. Therefore, this study proposes the estimation of SOC parameters using a statistical and metaheuristic approach from voltage and current input data in each battery cell. The experimental results showed that the metaheuristic-based method (ANFIS) had better RSME and R² values compared with the polynomial and linear regression or even the machine learning-based method (recurrent neural network) for training data.

Battery management systems are essential in electric vehicles and renewable energy applications, especially in ensuring optimal battery health and performance. Especially regarding the state of charge (SOC) in batteries consisting of many cells. The lifetime and efficiency of battery depend on the accuracy of the SOC parameter estimation. Moreover, the system that applies active balancing technology will move cells that have high SOC data to cells that have low SOC. Many methods have been developed, but the long execution time makes it less than optimal when applied. The speed of SOC estimation is also required in active balancing technology in addition to the accuracy factor. Therefore, this study proposes to estimate SOC parameters using a statistical and metaheuristic approach method from voltage and current input data in each battery cell. The experimental results showed that the metaheuristic-based method (ANFIS) had better RSME and R2 values compared to the polynomial and linear regression method.

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 an effort to determine the Personal Protective Equipment (PPE) required to protect against arc-flash hazards based on IEEE Std. 1584-2002, a simplified analysis technique was used with the energy limit curve method. The problem addressed was the potential inaccuracies in determining the required PPE level and maximum flash-protection distance when the traditional method does not precisely calculate the incident energy level and flash-protection limit. The purpose of this study was to evaluate a method that could be applied to various types of overcurrent protective devices in electrical systems, thus simplifying the arc-flash analysis. The method involved using the energy limit curve, which allows for quicker determination of the necessary PPE by plotting relay/fuse curves into the energy limit curve. This approach was implemented and tested at PLTU Paiton Unit 7 (PT. POMI). Important findings indicated that the energy limit curve method significantly reduced the time required to determine the appropriate PPE category compared to the IEEE 1584-2002 standard. The results showed that the process of determining the PPE category was more efficient, with fewer data requirements and shorter calculation times. The implications of this research suggest that the energy limit curve method can simplify arc-flash calculations for large industries with numerous buses, enhancing the overall safety protocols by providing a faster and potentially more accurate means of assessing arc-flash hazards and PPE requirements.

The use of electrical energy plays a vital role in supporting the continuity of production processes in industrial environments. One critical area that heavily relies on electrical power supply is in the planning of installing a capacitor bank with a detuned reactor. The primary objective of this planning is to enhance the power factor (cos φ) from 60% to 85.2% during full-load operations and up to 94% when operating as per demand simulations. The evaluation of power quality from the implementation of the Capacitor with Detuned Reactor is conducted through simulations using ETAP 12.6.0 software.The simulation results from ETAP 12.6.0 produce comparative graphs between buses equipped with the Capacitor with Detuned Reactor and buses without it, both during full-load operational conditions and when only operating in simulations. The information derived from the simulation provides a deeper insight into the impact of installing the capacitor with detuned reactor on power factor and power quality within this industrial environment. With this understanding, further steps can be taken to optimize the electrical power system within the industrial setting.

Kampung Mbesuk Ambyar, yang berlokasi di Kelurahan Tunjungsekar, Malang, memiliki potensi sebagai desa wisata dengan beragam inisiatif masyarakat dalam pengembangan Usaha Mikro, Kecil, dan Menengah (UMKM). Salah satu UMKM kuliner yang menonjol adalah Pemean Cafe, dijalankan oleh warga RT 01 RW 01 dengan semangat gotong royong. Politeknik Negeri Malang berkolaborasi dengan cafe ini dalam upaya memajukan usahanya melalui pemasangan running text berbasis WiFi. Tujuan utama dari pemasangan running text ini adalah untuk meningkatkan daya tarik Pemean Cafe, menarik minat konsumen yang melewati Jalan Tunjungsekar, serta meningkatkan nilai estetika cafe. Metode pelaksanaan proyek pengabdian kepada masyarakat melibatkan koordinasi dengan mitra, perancangan dan implementasi running text berbasis WiFi, serta pelatihan penggunaan dan perawatan peralatan kepada tim pengabdian dan mitra. Proses perancangan running text melibatkan uji fungsionalitas, keandalan, dan antarmuka pengguna. Rangkaian LED Dot Matrix P10 digunakan dalam tiga display yang menampilkan informasi berjalan secara horizontal, menyajikan konten mengenai menu, promo, dan pesan khusus. Melalui aplikasi LedArt, mitra dapat mengatur dan memperbarui konten running text dengan mudah. Dampaknya adalah meningkatnya pengetahuan dan kemampuan mitra dalam menggunakan teknologi ini. Diharapkan, pemasangan running text berbasis WiFi dapat berkontribusi dalam peningkatan pendapatan dan kesejahteraan warga Kampung Mbesuk Ambyar RW 01.