REE&PQJ-25. ISSN: 3020-531X Index
Renewable Energies, Environment & Power Quality Journal (REE&PQJ)
Volume 26, Issue 1, July 2026-> Go to (Issue 2)
If you want to see the articles published by RE&PQJ until 2023, click here.
1-7
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200 |
Optimizing MBR Performance: CFD and Experimental Insights on Aeration Design for Fouling Control |
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Abstract The optimization of membrane bioreactor (MBR) systems is a critical challenge in mitigating membrane fouling. To overcome this issue, a two-phase experimental–computational approach was applied to evaluate the effect of the distance between the aeration pipe and the membrane module on antifouling performance. ... READ MORE 8-15
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204 |
Case Study 1: Hybrid Solar and Wind Power Generation Prototype Abstract This case study presents the design, development, and implementation of a residential-scale hybrid solar and wind power generation system installed at the Center of Product Design and Advanced Manufacturing (CPDAM) at Frostburg State University (FSU). The “WISE” system integrates a 2-kW photovoltaic (PV) array and a 1.8 kW wind turbine mounted on a 45-ft monopole tower, jointly supplying a small residential-type building through a grid-tied configuration with net metering.... READ MORE
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16-21
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206 |
Impact of Forecast-Aware Observations and Attention Mechanisms in a Multi-Agent Deep Reinforcement Strategy for Voltage Control Abstract High DER penetration, particularly PV, induces sub-hourly voltage excursions and reverse power flows that are difficult to mitigate with slow and discrete devices (OLTCs and switched capacitor banks). We study a multi-agent soft actor–critic (MASAC) voltage controller implemented in PyTorch and quantify the impact of two components: (i) forecast-aware local observations (Fc) using an oracle 1-hour-ahead PV forecast summary and (ii) an attention-based centralized critic (Att) that exploits the electrical neighborhood structure. ... READ MORE
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22-26
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210 |
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A Novel Framework for Converter-Driven Stability Assessment in Large-Scale Power Systems Abstract This paper presents a unified framework forconverter-driven stability assessment in large-scale power systems. The approach builds on two resonance mode analysis-based criteria: the Lanczos-based positive-mode-damping (L_PMD) and the Arnoldi-based smallest eigenvalue logarithmic derivative (A_SELD). Both methods estimate the smallest eigenvalues of the nodal admittance matrix across a frequency range using sparse techniques, thus enabling efficient identification of oscillatory modes. ... READ MORE
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27-31
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212 |
Assessment of Photovoltaic Panel Efficiency Under Different Spectral Characteristics of Artificial Lighting Abstract The increasing use of photovoltaic (PV) systems in indoor and hybrid environments has raised the need to evaluatetheir performance under artificial lighting conditions. Unlike natural solar radiation, artificial light sources exhibit distinct spectral characteristics that significantly influence the energy conversion efficiency of photovoltaic panels. This paper presents an assessment of photovoltaic panel efficiency under different types of artificial lighting, with a particular focus on spectral power distribution effects. ... READ MORE
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32-36
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214 |
A Comparative Study of Non-Isolated Voltage Balancers Applied to Bipolar DC Microgrids Abstract The imminent expansion of distributed generation by small-scale units associated with renewable sources - such as wind and photovoltaic – combined with the increasing penetration of electric vehicles, highlights the strategic importance of DC microgrids. These systems conventionally adopt two main configurations: unipolar or bipolar. ... READ MORE
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37-42
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215 |
A Novel Method for Optimizing Offshore Substation Installation and Commissioning for Offshore Wind Projects Abstract Renewable energy, particularly offshore wind projects, has been a key focus for utility companies and developers over the past 15 years [1]. Organizations with extensive experience in power generation have increasingly pursued the concept of harnessing energy from marine environments. While the capital investment for offshore wind farms is significantly higher than for other power generation installations of similar capacity, studies indicate that wind resources in some regions offer greater stability and higher energy yield, enhancing long-term viability and efficiency ... READ MORE
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43-48
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217 |
Enhancing the Power Control of Wind Turbines in the Pitch Region Using PSO-Optimized Fuzzy Controller Abstract Wind turbines operate under highly nonlinear and uncertain conditions caused by complex aerodynamics and wind-speed variability, making stable power regulation challenging. This paper proposes a unified pitch control strategy based on a Fuzzy Logic Controller (FLC), whose membership functions and control parameters are optimally tuned using the Particle Swarm Optimization (PSO) algorithm to improve power regulation stability under wind variations. A detailed nonlinear dynamic wind turbine model is developed in MATLAB/Simulink, incorporating spatial and lag filters for enhanced aerodynamic accuracy... READ MORE
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49-53
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218 |
High-Fidelity Co-Simulation and Wind-Grid Coupling Mechanism Analysis of 15 MW Integrated Wind Turbines Abstract To address the multi-scale dynamic coupling challenges in 15 MW wind turbines, this paper establishes a full-dimensional aerodynamic-mechanical-electrical co-simulation platform integrating OpenFAST, Simpack, and Simulink. A dynamic data-exchange interface and a multi-rate cross-domain co-simulation strategy are proposed to overcome severe numerical stiffness. ... READ MORE
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54-59
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Short-Term Streamflow Forecasting for Run-Of-River Hydropower Plants using PCA-MLP and Local Linear Adjustment Abstract The participation of renewable energy sources in power systems requires reliable short-term generation forecasts to ensure the efficient operation of the electricity market. Small hydropower plants (SHPPs), which represent a significant share of renewable generation, are particularly affected by hydrological and meteorological variability. This impact is especially pronounced in basins with moderate streamflow, seasonal intermittency, and lack of upstream regulation, as occurs in several unregulated sub-basins of the Ebro River... READ MORE
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60-65
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226 |
Hierarchical Mathematical Optimization Model for Grid-Oriented Management of Aggregated Prosumer Communities Abstract This work presents a hierarchical mathematical optimization model for grid-oriented management of aggregated residential prosumer communities, equipped with photovoltaic (PV) generation and battery energy storage systems (BESS). Beyond maximizing individual self-consumption, the proposed Energy Management Strategy (EMS) targets power system operation by enabling aggregated storage to provide flexibility services to the grid.... READ MORE
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66-70
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227 |
Performance analysis of Savonius rotors with straight and Bach-type twisted blades Abstract In this work, experimental comparisons are conducted when two Savonius-type vertical-axis wind turbine rotors of different blade twist angles (γ) are placed with the same aspect ratio (AR = 2.0). During the initial setup, a straight blade (γ=0°) was used in the first design; while in the second configuration, twisted blades were employed with a γ of 30°. The rotors were checked for aerodynamic performance in comparable wind tunnel configurations along with the power coefficient (Cp), the starting torque and the rotational stability. ... READ MORE
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71-76
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231 |
An Electric Field Energy Harvesting System Prototype for Smart High-Voltage Transmission Grids Abstract The increasing deployment of smart power lines andsmart grid infrastructures requires a large number of distributed Internet of Things (IoT) devices for wireless monitoring, which has motivated the development of autonomous, maintenance-free power supplies. Electric-field energy harvesting (EFEH) exploits the displacement current induced by the time-varying electric field surrounding alternating-current power conductors. This enables non-contact energy extraction, the available power of which scales primarily with line voltage, capacitive coupling and operating frequency, while remaining independent of line current.... READ MORE
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77-82
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232 |
Analysing Energy Allocation in Renewable Energy Communities: A Hybrid Static-Dynamic model Abstract The current global energy landscape is facing numerous challenges as electricity demand progressively surges: the urgent need to decarbonize generation, the increasing strain on aging transmission infrastructures, and the complex integration of intermittent renewable resources. In this scenario, Renewable Energy Communities (REC) are emerging as promising assets to achieve energy security and face increasing electricity prices. ... READ MORE
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83-88
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234 |
Spanish Facilities For Developing Photovoltaic Offshore Energy Abstract This paper aims to create a list of possible shipyards and ports located within Spanish territory with the capability to build offshore solar platforms and the ability to store, prepare and move these structures once built, respectively. As such, a set of characteristics will be identified with each port and shipyard that will help recognize which is more suitable for any given scenario of installation site and platform. ... READ MORE
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89-94
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High-Capacity Conductor Data-Based Models for Dynamic Rating of Electrical Lines Abstract Accurate estimation of overhead conductor temperature is a key requirement for reliable dynamic line rating (DLR) and enhanced utilization of transmission networks. This paper presents a data-driven framework based on XGBoost regression to predict conductor temperature from electrical loading and meteorological variables. Hyperparameters are optimized using an Optuna-based search with controlled model complexity to ensure robust generalization. ... READ MORE
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95-100
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238 |
Development of a Digital Twin Framework for Condition Monitoring and Performance Assessment of a Wind Turbine Abstract The paper presents a comprehensive quasi-static digital twin of a utility-scale wind turbine developed in Python. The proposed digital twin framework combines dynamically acquired turbine measurements with static system parameters to reconstruct the steady-state operational behaviour of the wind turbine under real-world conditions. The digital twin integrates historical and real-time operational data to provide dynamic visualization of key performance indicators, enabling continuous insight into turbine behaviour and operational conditions. ... READ MORE
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101-105
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240 |
Pilot Project for Tidal Current Exploitation on the Huelva Coast (TidUtil) Abstract This work addresses the progress and development status of the TidUtil project, which explores the viability of installing a tidal turbine in the Huelva estuary as a sustainable response to rising energy demands and fossil fuel dependency. Huelva’s unique coastal geography and extensive wetlands offer a strategic setting for tidal stream energy. Unlike other renewables, tidal power provides a stable and predictable output based on semi-diurnal cycles.... READ MORE
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106-111
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241 |
Physical Model Experimental Study on the Characteristics of Tidal Current Turbine Array Development in Narrow Channels Abstract To investigate the flow field and energy extraction characteristics of tidal current turbine array deployment in narrow channels, this study established a physical model experimental system based on a circulating pool. Three turbine configurations with distinct transmission systems and a high-performance rotor optimized for low-velocity conditions were developed, with narrow channel conditions simulated using flow baffles. ... READ MORE
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112-117
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242 |
Impact of Electricity Market Volatility on the Management of Hybrid Renewable Systems with Storage Abstract This article analyzes the performance of a hybrid renewable energy system integrating photovoltaic and wind generation with Pumped Hydro Energy Storage (PHES) in the Spanish day-ahead electricity market. The methodology employs a simulation model based on generation profiles from Zaragoza, Spain, comparing two scenarios: 2019 (low volatility, average spread of 16.90 €/MWh) and 2025 (high volatility, average spread of 101.77 €/MWh). ... READ MORE
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118-122
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245 |
From Energy Security to Water Stress: Implications of Pakistan’s Solar Success Abstract Pakistan has experienced an unprecedented expansion in solar photovoltaic (PV) deployment over the past three years, emerging as one of the world’s fastest-growing solar adopter. This transformation has been driven by escalating electricity tariffs, declining PV and battery costs, and persistent grid unreliability. This paper provides an assessment of the structural drivers of decentralized solar adoption, evaluates its impact on the national energy system and consumer behavior, and analyzes the unintended consequences for groundwater sustainability. ... READ MORE
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123-128
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248 |
Laboratory Characterisation of PMU-based Detection of Sub-Synchronous Oscillation Abstract This paper presents a laboratory study of thelimitations and capabilities of sub-synchronous oscillations (SSOs) detection with a phasor measurement unit (PMU), with particular focus on amplitude attenuation. A test-bench to analyse the frequency response of a commercial PMU is presented, showing significant attenuation occurring outside the nominal system frequency range, which complicates the detection of SSOs.... READ MORE
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129-134
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251 |
Development and HIL Validation of a Low-Cost Two-Level Control Strategy for HVAC Systems Abstract Buildings account for a substantial fraction of globalfinal energy consumption, with HVAC systems representing their dominant load. The progressive deployment of dynamic electricity pricing creates a strong economic incentive to shift thermal loads toward low-price periods; however, implementing optimization frameworks on low-cost embedded hardware remains largely unvalidated experimentally.... READ MORE
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