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31,207 Article Results

Condition assessment of medium voltage cable insulation using leakage current and phase-resolved partial discharge

10.11591/ijape.v15.i3.pp1340-1350
Kamrai Janprom , Sittadach Morkmechai , Natchanun Prainetr , Supachai Prainetr
Reliable operation of medium-voltage distribution networks critically depends on the integrity of cross-linked polyethylene (XLPE) insulated cables. This paper proposes a diagnostic methodology that integrates leakage current (LC) measurement with phase-resolved partial discharge (PRPD) analysis to assess cable insulation condition. A MATLAB R2025 simulation model is first developed to emulate partial discharge (PD) signals superimposed on leakage current, providing preliminary validation of the proposed approach. The method is then experimentally verified using a 70 mm² XLPE cable rated at 16/20 (24) kV and tested in accordance with IEC 60502. Under applied high-voltage stress, leakage current and PD activity are measured, and insulation degradation is characterized using PRPD patterns. Both simulation and experimental results confirm that the proposed method reliably detects insulation defects and provides accurate condition assessment of XLPE cables. These findings demonstrate the potential of the method as a practical tool for supporting condition-based maintenance in medium-voltage power distribution systems.
Volume: 15
Issue: 3
Page: 1340-1350
Publish at: 2026-09-01

Mitigation of grid harmonics using active filters with adaptive energy valley optimization (AEVO) control techniques

10.11591/ijape.v15.i3.pp965-974
Nagaraja Bodravara , Ezhilarasan Ganesan
Many nonlinear devices are linked to the power grid as the fast development of the power electronics sector causes serious harmonic pollution of the grid voltage. Active power filter (APF), which can detect the harmonics at the installation location, is the tool used for the harmonic voltage treatment. While considering the surplus of APF active devices to guarantee effective and stable operation of APF, the harmonic sources at each node will change with time and need the injection of fresh harmonic compensation commands. This work intends to offer a dynamic adjustment approach of distributed harmonic compensation based on the computation model of active device margin of APF. First, for certain harmonic combinations, the APF active device loss and injection temperature model is developed to compute in real time whether the harmonic injection command satisfies the active device margin. Furthermore, the adaptive energy valley optimization method is applied to derive new harmonic injection commands for the power grid with harmonic source changes, which on one hand lowers the total voltage harmonic distortion rate of the power grid, and on the other hand satisfies the active device margin to guarantee stable operation of APF.
Volume: 15
Issue: 3
Page: 965-974
Publish at: 2026-09-01

Fuzzy logic based intelligent control of active front end converter for five phase voltage source inverter fed induction motor drive

10.11591/ijape.v15.i3.pp1132-1146
C. Kalaivani , D. Raja , S. Sivasakthi , R. Gnanaselvam
This paper deals with an active front-end converter (AFEC) for a 5-ϕ inverter-fed induction motor (IM) drive. Multi-phase IM drive stands as an evolving domain of electrical drive usages. Supply from the grid is prone to be unbalanced and affects the input power quality of adjustable multi-phase IM drives. This work proposes a fuzzy logic control strategy with the space vector pulse width modulation (SVPWM) switching scheme for the AFEC outer voltage control along with inner current control loops for attenuating the disturbances due to voltage unbalance conditions. This method of control can keep the power factor nearby unity on the AC side with sinusoidal AC current and constant DC voltage at the DC link capacitor. A 5-ϕ inverter designed with SVPWM for IM drive enables operation of the drive with reduced percentage total harmonic distortion (THD) in the voltage of output side. This SVPWM control for a 5-ϕ voltage source inverter (VSI) uses entire voltage of the DC bus and the output responses are more efficient having a minimal lower order THD. The dynamic performances of a 5-ϕ VSI fed IM drive are investigated. The simulation results show the system has an improved power factor at the front-end, constant DC voltage across the capacitor, low THD at the input current, and a superior output performance for the 5 phase IM based drive.
Volume: 15
Issue: 3
Page: 1132-1146
Publish at: 2026-09-01

Design of an iterative AI enhanced STATCOM-controlled hybrid renewable energy system with multi-agent coordination and predictive stability intelligence sets

10.11591/ijape.v15.i3.pp1147-1156
Bhishan Wadhai , Nitin Dhote , Mohan Lal Kolhe
Renewable energy integration causes intermittency, nonlinear dynamics, and grid-code restrictions in modern power systems. Although hybrid renewable energy systems combining wind, photovoltaic, and fuel cell sources increase energy availability, conventional control approaches often fail to maintain voltage stability, power quality, and rapid fault recovery under varying operating conditions. High renewable penetration and noisy conditions worsen these concerns. Existing methods typically address voltage regulation, transient stability, fault resilience, and power sharing independently using fixed or offline-tuned controllers, limiting adaptability during grid disturbances. To overcome these challenges, this study proposes an AI-enhanced STATCOM-controlled hybrid renewable energy system with learning-based control, predictive stability assessment, and multi-agent coordination. Adaptive reactive power support, noise-resilient fault detection, renewable source power sharing, predictive voltage regulation, and physiologically inspired transient stability prediction using hierarchical reinforcement learning. The simulation results maintain system voltage deviation within ±2%, harmonic distortion below 2%, fault detection within 7 ms, and transient stability prediction accuracy above 98% across varied operating conditions. Voltage recovery, overshoot suppression, and resource utilization efficiency improve above benchmark techniques. Thus, findings demonstrate that AI- enhanced STATCOM works as cognitive grid-interfacing agents rather than passive compensators for improving stability, power quality, and operational resilience in various deployment settings.
Volume: 15
Issue: 3
Page: 1147-1156
Publish at: 2026-09-01

Advanced wireless electric vehicle charging system with cascaded fuzzy control and multi-stage rectification

10.11591/ijape.v15.i3.pp1253-1263
Naveena Sandhadi , Srinu Naik Ramavathu
The growing demand for electric vehicles (EVs) has intensified the need for high-efficiency, reliable, and user-friendly wireless charging systems. Conventional wired chargers and existing wireless solutions often suffer from high losses, poor power quality, and limited control accuracy under dynamic operating conditions. To address these challenges, this paper proposes an advanced wireless charging architecture integrating a three-phase Vienna rectifier, high-frequency inverter, and isolation transformer. A three-phase frequency inverter and a three-stage synchronous rectifier further enhance conversion efficiency. Precise voltage and current regulation is achieved using a cascaded fuzzy controller (CFC) combined with a proportional-integral (PI) controller. MATLAB simulations demonstrate unity power factor, improved efficiency, and stable performance under varying load conditions. The results confirm that the proposed architecture offers a scalable, robust, and energy-efficient solution capable of advancing EV charging infrastructure and supporting sustainable transportation.
Volume: 15
Issue: 3
Page: 1253-1263
Publish at: 2026-09-01

Development of 15/33 level constant and variable DC source inverter for different loading conditions

10.11591/ijape.v15.i3.pp1051-1063
Vijayaraja Loganathan , Dhanasekar Ravikumar , Ganesh Kumar Srinivasan , Deepak Balachandran Kasthuri
In this paper, a design of symmetric and asymmetric multilevel inverter (MLI) with few quantities of switch is presented. The structure can be able to operate with both symmetric and asymmetric sources. The presented model is capable of producing output levels of 15 with symmetric structure and 33 with asymmetric structure. The tendered circuit is constructed with 14 switches and 7 sources. The presented MLI can be placed in moderate-voltage applications such as: electrical machine drives. The circuit's switching sequences are framed by a detailed discussion from its operation. In MATLAB/Simulink, the inverter is simulated for resistive, resistive-inductive, and induction motor loads, and the results are portrayed. Also, the working of the inverter is monitored in terms of harmonics presence in the load signals. Additionally, the presented MLI is developed in real time to evaluate its performances. The results obtained from the real time inverter are found satisfactory.
Volume: 15
Issue: 3
Page: 1051-1063
Publish at: 2026-09-01

Performance analysis of a photovoltaic system under real conditions using modeling and simulation

10.11591/ijape.v15.i3.pp1409-1421
Fatima Falil , Noureddine Benabadji , Ahmed Allali , Hamid Bouzeboudja
The main objective of this study is to evaluate the performance of a photovoltaic (PV) system under real-world conditions by analyzing three key climatic variables on a monthly scale: insolation, average daily temperature, and photovoltaic power output. Insolation, defined as the average daily sunshine duration, is a critical parameter for estimating the solar energy potential in the Ghardaïa region, which is characterized by a desert climate. Average daily temperature directly influences the efficiency of PV panels, as elevated temperatures tend to reduce their performance. Photovoltaic power output, expressed in kWh/m²/day, is calculated based on solar radiation, providing a measure of actual energy generation under prevailing climate conditions. The analysis of these three climatic parameters offers valuable insights into seasonal variations and their impact on solar energy production in the Ghardaïa region. To optimize PV system performance, the study emphasizes the importance of accurate system design supported by advanced numerical methods. We extend the modeling from individual solar cells to complete PV modules and arrays, accurately reproducing their electrical characteristics. Simulations are performed in MATLAB/Simulink to validate the proposed model, which is based on an enhanced two-diode representation that reflects realistic operating conditions.
Volume: 15
Issue: 3
Page: 1409-1421
Publish at: 2026-09-01

Analysis a mixtures of bentonite, palm kernel shell charcoal and magnesium sulfate (MgSO4) for reducing grounding resistance using rod-type electrodes at varying soil depths

10.11591/ijape.v15.i3.pp1386-1398
Ferry Rahmat Astianta Bukit , Naemah Mubarakah , Adrian Sinaga
A grounding system is an essential electrical safety mechanism designed to protect humans and equipment from disturbances such as lightning-induced surge currents or short circuits. It operates by channeling excess current into the ground through grounding electrodes, thereby reducing the risk of damage and hazards. High grounding resistance can compromise the dissipation of fault currents and overvoltages, leading to safety risks. This study focuses on reducing grounding resistance through chemical soil treatment using bentonite combined with a mixture of magnesium sulfate (MgSO₄) and palm shell charcoal. The optimal composition consists of 10% bentonite, 10% native soil, and 80% of the material mixture. Experiments were conducted at electrode depths of 30 cm, 60 cm, 90 cm, and 110 cm. Results showed that the initial resistance of 312.5 Ω at 30 cm depth decreased to 86.1 Ω, and at 110 cm depth, resistance decreased from 186.5 Ω to 53.0 Ω. The average reduction reached 77.4%, indicating that this material combination is highly effective in lowering grounding resistance and improving system performance.
Volume: 15
Issue: 3
Page: 1386-1398
Publish at: 2026-09-01

Structural and behavioral determinants of HIV among Indonesian MSM

10.11591/ijphs.v15i3.26988
Neila Sulung , Adi Cahya Murfi , Efriza Efriza , Nurdin Nurdin , Cici Apriza Yanti
HIV prevalence among men who have sex with men (MSM) remains disproportionately high in Indonesia. While behavioral risk factors have been widely studied, evidence integrating structural determinants remains limited. This study examined the role of structural and behavioral factors associated with HIV status among MSM in Jambi City, Indonesia. A cross-sectional study was conducted among 60 MSM recruited using non-probability sampling due to the hidden nature of the population. Data were collected using validated structured questionnaires and analyzed using multivariable logistic regression. Fifty percent of respondents were HIV-positive. Low educational attainment emerged as an independent structural determinant of HIV status (AOR = 5.51; 95% CI: 1.14-26.49), whereas behavioral factors showed significant crude associations but lost significance after adjustment. HIV vulnerability among MSM is shaped by structural inequalities beyond individual behaviors. Structural-focused interventions are essential to strengthen HIV prevention strategies in Indonesia.
Volume: 15
Issue: 3
Page: 640-647
Publish at: 2026-09-01

Biophysiological responses of premature infants in neonatal nursing care: a descriptive study of infant and maternal characteristics

10.11591/ijphs.v15i3.27051
Dwi Hastuti , Anggorowati Anggorowati , Zubaidah Zubaidah , Tri Nur Kristina , Siti Yuyun Rahayu Fitri
Preterm infants are physiologically vulnerable and require continuous cardiorespiratory and thermal monitoring during neonatal nursing care. Evidence describing physiological indicators in relation to infant maturity and maternal sociodemographic characteristics remains limited. This study aimed to describe physiological indicators (heart rate, respiratory rate, oxygen saturation, and temperature) among preterm infants and examine their associations with infant and maternal characteristics. An observational descriptive study was conducted from August to December 2025 among preterm infants (
Volume: 15
Issue: 3
Page: 726-736
Publish at: 2026-09-01

Physical-maturation with health education on the incidence of anemia among adolescents who married at a young age

10.11591/ijphs.v15i3.26734
Desta Ayu Cahya Rosyida , Nyna Puspita Ningrum , Nina Hidayatunnikmah , Solichatin Solichatin
Physical maturity and the incidence of anemia in adolescents who marry at a young age have an impact on the biological and physiological unpreparedness of the adolescent body that is not yet fully mature against the increased risk of anemia, especially in early pregnancy. The solution in this paper provides health education and increased awareness of the dangers of early marriage to physical health, especially the risk of anemia. Nutrition intervention programs and iron supplements for adolescent girls. The purpose of this study was to evaluate the effect of physical maturity on the incidence of anemia in adolescents who marry at a young age. Quantitative research method with quasi-experimental pre-post test design with control group. The population of the study was 54 young women who were married at a young age. The sample size of 44 respondents. Sampling was done using the accidental technique. Data were analyzed using the Chi-square test. The difference in mean hemoglobin levels in adolescents before and after the intervention was analyzed using the paired t-test. Based on the results of statistical test, a p-value of 0.000 was obtained (p-value ≤ 0.05), which indicated that the difference was statistically significant.
Volume: 15
Issue: 3
Page: 777-786
Publish at: 2026-09-01

Association between exclusive breastfeeding and stunting among toddlers in a high-burden rural community of South Central Timor: a cross-sectional study

10.11591/ijphs.v15i3.26943
Roslin E. M. Sormin , Emanuel Gerald Alan Rahmat
This cross-sectional study assessed the relationship between exclusive breastfeeding and stunting among toddlers in Batuputih, South-Central Timor, East Nusa Tenggara, Indonesia. Conducted in July 2025, it involved 52 children aged 6-59 months using total sampling. Exclusive breastfeeding history was obtained through caregiver interviews and verified with health records to reduce recall bias. Height-for-age z-scores were measured using WHO standards, and data were analyzed with Fisher’s exact test and penalized logistic regression with Firth correction to address the small sample size. Stunting prevalence was 59.6%, while exclusive breastfeeding coverage reached 82.7%. All toddlers who were not exclusively breastfed were stunted. Regression analysis confirmed a strong protective effect of exclusive breastfeeding against stunting (OR 0.05; 95% CI 0.003-0.92; p = 0.012), which remained significant after adjusting for birth weight, sex, recent illness, and maternal education. These findings highlight exclusive breastfeeding as a critical protective factor in high-burden rural settings. Yet, the persistence of stunting despite high coverage underscores the need for integrated strategies at the primary health-care and district levels. Strengthening breastfeeding counseling must be complemented by maternal nutrition, infection prevention, and sanitation improvements within broader stunting prevention frameworks tailored to rural Timorese communities.
Volume: 15
Issue: 3
Page: 745-752
Publish at: 2026-09-01

Analysis of charge transport kinetics in photovoltaic based on FTO@TiO2@CdS:Cu²⁺@ZnS photoanode

10.11591/ijape.v15.i3.pp1064-1071
Thai Van Thanh , Nguyen Van Minh , Ho Minh Trung
This study examines charge-transport kinetics in TiO₂@CdS:Cu²⁺@ZnS quantum dot-sensitized solar cells, addressing a key research gap regarding how controlled Cu²⁺ incorporation simultaneously affects recombination dynamics and interfacial charge-transfer resistances. While previous works mainly emphasized optical improvements from Cu doping, the coupled effects on impedance characteristics and device performance remain insufficiently clarified. Cu-doped CdS quantum dots with concentrations ranging from 0 to 0.5 mol were synthesized via the SILAR method and protected with a ZnS passivation layer. Electrochemical impedance spectroscopy and I-V characterization were employed to quantify changes in Rct1, Rct2, Jsc, Voc, fill factor, and power conversion efficiency. The optimal Cu(0.2) device achieved 4.69% efficiency with a Jsc of 27.4 mA/cm², reflecting enhanced charge transport, reduced recombination, and improved light absorption. The findings reveal the previously underexplored dual role of Cu doping in tuning both optical and electronic properties. Furthermore, they identify the threshold at which excessive Cu leads to recombination-dominated losses and structural degradation. This work establishes a clearer mechanistic basis for engineering high-performance quantum absorber architectures in next-generation solar cell technologies.
Volume: 15
Issue: 3
Page: 1064-1071
Publish at: 2026-09-01

Microplastic exposure in anchovies: baseline evidence from small-island waters of Indonesia

10.11591/ijphs.v15i3.27108
Veronika Amelia Simbolon , Erpina Santi Meliana Nadeak , Demsa Simbolon , Ristina Rosauli Harianja
Microplastics are emerging contaminants in aquatic environments and may enter human exposure pathways through seafood consumption. However, baseline exposure data for small pelagic fish in small-island settings remain limited, particularly in Indonesia. Anchovy (Stolephorus spp.), which is commonly consumed whole, may represent a direct dietary exposure pathway. This study aimed to quantify and characterize microplastic contamination in anchovy collected from Dendun Island waters. A descriptive cross-sectional study was conducted in 2025 using 100 anchovy samples obtained from local catches. Microplastics were extracted using oxidative digestion followed by density separation, filtration, and stereomicroscopic observation. Data were analyzed descriptively. A total of 109 microplastic particles were identified, with a mean abundance of 1.09 particles per individual. Fibres dominated (67.0%), followed by films (20.2%) and fragments (12.8%). Various colours were observed, indicating heterogeneous particle characteristics. This study provides baseline evidence of microplastic contamination in anchovy from a small-island coastal setting, highlighting its potential as a dietary exposure pathway. These findings support the need for routine monitoring and strengthened plastic pollution control strategies to protect seafood safety and public health.
Volume: 15
Issue: 3
Page: 860-867
Publish at: 2026-09-01

Predictors of blood pressure among adults: the role of lifestyle and body composition

10.11591/ijphs.v15i3.27128
Evelin Malinti , Yunus Elon , Mori Agustina br Perangin-angin
Hypertension is influenced by multiple biological and behavioral factors; however, the relative contributions of body age and body composition remain unclear. This study examined the associations of lifestyle behaviors, body age, and body composition with blood pressure among 167 adults in Indonesia using a cross-sectional design. Lifestyle score, body age, body mass index (BMI), skeletal muscle mass, total body fat percentage, and blood pressure were assessed using standardized procedures. Spearman correlation and multiple linear regression analyses were performed. Body age was the only significant predictor of systolic blood pressure (β = .311, p = .002). In contrast, skeletal muscle mass (β = .172, p = .030) and total body fat percentage (β = .248, p = .017) were significant positive predictors of diastolic blood pressure. Lifestyle score and BMI were not significant predictors in the regression models. These findings suggest that physiological aging and body composition are more strongly associated with blood pressure than lifestyle behaviors. Incorporating body age and body composition assessments into cardiovascular risk screening may improve hypertension prevention and early intervention strategies.
Volume: 15
Issue: 3
Page: 669-677
Publish at: 2026-09-01
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