Current Issue : October-December Volume : 2026 Issue Number : 4 Articles : 6 Articles
This paper presents a case study demonstrating the operation of a 50 kVA three-phase variable-speed diesel generator at a Spanish Antarctic research base, located in an area of special ecological and environmental value, under conditions of extreme humidity and temperature. It verifies the fuel savings achieved through the use of variable-speed technology compared to standard, constant-speed generators. Furthermore, given that the price of fuel is significantly higher due to the high cost and complexity of transporting it to the base, the fuel savings at the base represent a huge logistical advantage, quite apart, of course, from the environmental benefits of such savings. A key feature of the equipment presented is that it has a system for recovering waste heat from the combustion engine, which, when integrated into the base’s hot water system, is used to increase the domestic hot water capacity, adding value to the machine whilst also delivering fuel savings....
Introduction: Digital twin (DT) technology has gained significant relevance and application in electrical engineering due to its capabilities in simulation, real-time monitoring, and system optimization. Although DT research has demonstrated benefits across multiple engineering disciplines, a focused synthesis of research specifically within electrical engineering remains limited. Therefore, this study aims to systematically review the application of DT technologies in electrical engineering research, map the current state of knowledge, and identify future directions for integration and scalability. Methods: A systematic literature review was conducted following predefined eligibility criteria. A total of 84 publications published between 2015 and 2025 were selected for the final review. The studies were analyzed and categorized into seven major themes: power and energy systems applications, electric machines and transportation, fault diagnosis and condition monitoring, real-time control and hardware-in-the-loop implementation, modeling and simulation, IoT and computing platforms, and cybersecurity and lifecycle management. Results: The review findings indicate a steady increase in scholarly attention toward DT technologies over the examined period. The literature showed strong emphasis on applications in power systems and IoT-supported platforms, while also demonstrating the relevance of DTs across a broad range of electrical engineering domains. The thematic analysis highlighted the diverse functionalities of DTs in improving system performance, predictive maintenance, operational efficiency, and real-time decision-making. Discussion: The study demonstrates that DT technology has become an important research area within electrical engineering and continues to expand into multiple application domains. However, the review also identified the need for more robust, scalable, and standardized frameworks to support wider implementation and interoperability. Future research should focus on addressing challenges related to integration, cybersecurity, standardization, and lifecycle management to enable broader adoption of DT technologies in electrical engineering systems....
This research designs a pico-hydro power system utilizing an Archimedes Screw turbine and an 18S16P Permanent Magnet Synchronous Generator (PMSG) for low-head efficiency. The primary focus is on optimizing real-time IoT-based monitoring via the Blynk application to replace inefficient manual observation. The methodology includes Infolytica MagNet simulations, manufacturing, and testing electrical parameters (voltage, current, power, frequency). Results indicate that power output increases linearly with Revolutions Per Minute (RPM), while the PZEM-004t sensor achieves high accuracy with voltage errors as low as 0.04–0.2%. This system successfully integrates permanent magnet technology and digital monitoring as a sustainable, measurable, renewable energy solution....
The displacement of synchronous generators by inverter-based renewable energy sources (RES) has eroded system inertia, weakening frequency stability even as voltage stability improves. This paradox poses a major challenge for modern grids. Battery Energy Storage Systems (BESS) offer synthetic inertia and rapid frequency response, but their stabilising impact depends critically on placement. Using dynamic simulations on the IEEE 9-bus system, this study demonstrates the voltage–frequency paradox across increasing RES penetration. Results show that strategic siting prevents frequency collapse while enhancing voltage recovery, providing a unified mitigation strategy for high-renewable systems....
In the context of the need for Ukraine to transition to sustainable development, it is necessary to develop non-traditional diagnostic technologies (including those that use a complex of geophysical methods) for both the status of ecosystems and the dynamics of anthropogenic impact on the environment. However, geophysical methods have long been developed mainly under the influence geological exploration process, and direct transfer of the accumulated scientific and practical experience to the sphere of solving engineering and environmental problems is impossible. To solve these problems, it is necessary to develop modern modifications of geophysical methods aimed, to a greater extent, at studying the upper part of geological section to solve engineering and environmental problems, and not for "deeper geological exploration" studies. The application of detailed electrical exploration studies in the modification of electrical tomography and detailed 3D modeling of the upper part of geological section in developing engineering and environmental tasks in technogenically loaded territories is shown. The depleted flooded granite open pit on the outskirts of Zaporizhzhia-city, which is used as a storage facility for waste from oil mills, as well as the waste dump of Zhovtneva CPP Joint-Stock Company in Western Donbas were examples of territories for studies....
This paper presents a comprehensive review of voltage stability challenges in South Africa’s constrained power grid, particularly in the context of rising hybrid renewable energy integration. With the growing deployment of inverter-based resources (IBRs) like solar PV, wind, and battery energy storage systems (BESS), especially under programmes through the Independent Power Procurement Office, voltage stability has emerged as a key concern, particularly in weak grid areas like the Northern Cape Province. We highlight how weak grids characterized by low short-circuit capacity, long transmission lines, and limited reactive power support are more susceptible to voltage instability, especially with high penetration of non-synchronous generation. Using a modified IEEE 14-bus system with hybrid generation, the study simulates a weak grid scenario. Findings point to significant reactive power losses and capacitive over-voltages in long and lightly loaded lines, mirroring some of the weak-grid-transmission challenges experiences in an area of the South African power grid. The study underscores the importance of dynamic load modelling (e.g., ZIP and exponential models) and inverter behaviour in stability analysis. It concludes that hybrid systems, when optimally designed and integrated with storage, can help support grid stability. However, proactive planning, advanced modelling, and compliance with evolving grid codes remain essential for securing reliable renewable integration....
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