Adrianti Adrianti

The global integration of renewable energy sources like photovoltaics requires efficient high-step-up DC-DC converters. Conventional boost converters exhibit inherent limitations in achieving high voltage gain efficiently, particularly under high duty cycle operation, where switching losses, device stress, and output voltage ripple become significant. This paper proposes a novel hybrid DC-DC converter that integrates a four-phase interleaved input stage with a five-level switched-capacitor (SC) multiplier network. The proposed topology introduces a modular and structurally decoupled architecture, in which current conditioning and voltage boosting functions are independently realized. This enables scalable voltage gain through modular expansion without requiring extreme duty cycles or additional magnetic components. The interleaved stage reduces input current ripple and improves current sharing, while the multilevel SC network provides a high voltage conversion ratio and balanced voltage stress across components. Comprehensive simulations using PSIM software validate the converter's performance. With a 25 V input, the proposed converter achieves an output voltage of approximately 250 V (gain of 10), a high efficiency of 95.2%, output voltage ripple below 2%, and balanced capacitor voltages. The results confirm that the proposed converter offers an efficient, scalable, and high-performance solution for high step-up applications.

Toko amal belum lazim di Indonesia, karena itu dibutuhkan promosi yang lebih baik agar dikenal oleh masyarakat luas. Partisipasi masyarakat sangat penting bagi keberlajutan toko dan juga terlaksananya tujuan amal yang ingin dicapai. Tantangan terbesar adalah membangun kesadaran kolektif bahwa donasi dan belanja di toko amal bukan sekadar transaksi, melainkan bagian dari gerakan sosial dan keberlanjutan. Kegiatan pengabdian Masyarakat yang dilakukan oleh dosen dan mahasiswa Departemen Teknik Elektro Universitas Andalas bertujuan untuk revitalisasi branding dan tampilan toko amal, sebagai bentuk kegiatan promosi. Kegiatan ini telah menghasilkan desain dan realisasi plang nama toko yang dilengkapi dengan lampu (neon box). Lampu pada neon box ini, diatur waktu mati dan hidupnya secara otomatis menggunakan sensor cahaya. Selain itu telah dihasilkan media promosi berbayar melalui sosial media dan penyebaran pamflet promosi..Kegiatan telah terlaksana dengan baik dan diharapkan dapat membantu penyebarluasan keberadaan toko dan menarik partisipasi Masyarakat yang lebih luas.

Vehicle-to-Grid (V2G) technology is an innovative concept designed to support frequency stability by enabling two-way energy exchange between electric vehicles (EVs) and the power grid, especially in systems with high penetration of renewable energy resources. This paper examines the battery electric vehicles’ demand nature also as an ancillary support resource to address intermittency of renewable energy sources and grid frequency support through V2G technology. The study highlights technological issues such as degradation rates of batteries, communication difficulties, and scaling problems alongside issues of regulation and market that encompass large-scale implementation of V2G. Tackling the effectiveness of V2G systems in frequency regulation The effectiveness of approaches like virtual inertia emulation, enhanced control algorithms, and decentralized frameworks are discussed as ways of enhancing V2G systems. These findings reaffirm that V2G has tremendous potential in the electric grid yet, it must be noted that solving these issues remains critical through transformational research and policy strategy. The conclusions help to better understand the prospects for improving V2G towards more accurate support for frequency stability in transition to sustainable energy systems.

Padang City is an earthquake-tsunami-prone area; therefore, preparedness to anticipate disasters is essential. The city has made evacuation routes and provided Temporary Evacuation Shelters and Final Evacuation Shelters. Universitas Andalas (Unand) is in the safe zone of a tsunami disaster and can be used as a final evacuation shelter. When a disaster occurs, most of the electrical network experiences damage. Hence, only local electrical power supply can be relied on. Unand has gensets and PV that can supply the refugee shelters. This study aims to analyse Unand’s power supply ability to provide electricity for planned refugee shelters. The research started with shelter location selection, measuring shelter area, determining shelter capacity, calculating shelter electric demand, and analysing the local supply adequacy in serving the electric demand. The results show that the shelters can accommodate 3704 refugees, and the peak demand is 55.1 Kw in the evenings. The peak demand is far lower than the power supply’s maximum output. Then, based on the demand and generating output, power flow simulations are carried out to determine the electrical conditions in the network. It is found that Unand can meet the refugee’s electrical power needs and the electricity quality is within standard.

Dampak Penyambungan PLTM Bayang Nyalo ke Sistem 20 kV PLN ULP Painan, Sumatera Barat

Analisa Hosting Capacity Photovoltaic pada Feeder Adinegoro 20 kV, Kota Padang

Air temperature rise due to global warming can increase the demand for electricity, because of the more frequent and intensive use of air conditioners and fans. Air temperature rise due to global warming can increase the demand for electricity, because of the more frequent and intensive use of air conditioners and fans.

Studi Pemanfaatan Relai Jarak Quadrilateral untuk Proteksi Saluran Distribusi dengan Pembangkit Tersebar

Distance relays can be a suitable protection relay for distribution lines. It could replace the commonly known overcurrent based relays that experience drawback performance due to installation of distributed generation. However, the capability of distance relays for working on distribution line is not known very well. Therefore, this research was conducted in order to have a clear picture about the performance of distance relay on distribution lines that having distributed generation. The research is conducted by simulating distance relays on distribution lines using Digsilent Powerfactory 2017. Capability of the relays was tested for four types of faults (phase and earth faults), each of them with bolted and resistive faults and remote infeed effects. From the simulations have been found that distance relays work correctly for all network condition, i.e. grid connected, islanding operation and DG disconnected. Distance relays also coordinate correctly with over current relays. However, the relays suffer incorrect operation due to fault resistances and remote infeed effect from distributed generation.

Islanding operation of distributed generation becomes a more appealing operation since large numbers of distributed generation have been installed worldwide. Islanding operation can improve the network reliability as the distributed generation continues providing electrical power for consumers when grid outages occur. However, the protection scheme for the islanding condition is one factor that hinders the realization. The setting of overcurrent relays on distribution network is calculated based on grid-connected condition hence the relay often fails to protect the network during islanding condition. Therefore, this paper proposes a method to establish overcurrent relay settings that coordinate correctly for both islanding and grid connected. The method tries to find a compromise between the setting for grid-connected and grid disconnected condition. The results of a case study show that method has successfully obtained a setting which provides correct coordination of the standard inverse overcurrent relay for both grid-connected an islanding condition.