bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Condition Assessment Method of Transformer Based on Cloud Model
Authors: Zhang Shize , Peng Chao , Xiong Yi , Jin Yating , Mao Jiawei 
Published: March 2024

Abstract
The traditional evaluation method of transformer has the problems of strong subjectivity of threshold value and fuzzy correlation of state quantity, which is difficult to accurately evaluate the operation quality of transformer. In order to solve these problems, this paper proposes a comprehensive evaluation method of transformer performance evaluation and operation quality based on cloud model. The evaluation index system of power transformer operation quality considering performance is constructed, including target layer, performance layer and index layer. The triangular fuzzy number is used to optimize the set of expert opinions, and the indexes are combined and weighted by fuzzy analytic hierarchy process and entropy weight method. After the data is degraded, the membership matrix of transformer operation index is constructed by using the cloud model, and the performance state weighting and membership degree are comprehensively considered to realize the performance evaluation of transformer and the comprehensive evaluation of operation quality based on performance. By using this method to predict 10 transformers in operation for a period of one month, it is possible to accurately identify abnormal situations on site, with a prediction accuracy of 96.28%. Compared with the traditional method of “predicting first and then diagnosing”, it has improved by 14.32%, overcoming the shortcomings of subjectivity, ambiguity, and ignoring the correlation of state variables in traditional evaluation methods. This method provides new ideas and methods for accurate evaluation of transformers.
Analysis and Preventive Measures for an Abnormity of 220kV Isolating Switch
Authors: Yang Sen , Zhang Dawei , Ju Xinxin , Duan Liankai , Hao Qiang , Wang Shuai , Su Hainan 
Published: March 2024

Abstract
With the development of the power grid, the cutter brake is a kind of main equipment used cooperatively in the transmission and distribution line of the substations with the circuit breaker in the operation and maintenance of the electric power system. Its main role is to ensure the safety of the staff during the maintenance of high voltage equipment. The cutter brake forms a clear disconnection point to provide the staff with a sufficiently large insulation interval between the equipment in need of repair and other energized parts. In the long-term operation, various reasons may lead to various failures of the cutter brake, causing great security risks to the safe and stable operation of the power grid and personal safety. This paper is mainly focused on analyzing the abnormal phenomenon of the poor contact of the dynamic and static contact fingers of B phase of I cutter brake of Xinlang Line 1 in the 220kV substation, which causes most of the current to flow through the B phase of Xinlang Line 2. Future management and preventive measures for this type of cutter brake are also proposed in this paper.
Study on Transmission Attenuation Characteristics of Abnormal Discharge Current in Transmission Lines
Authors: Zhao Hailong , Pang Songling , Zhang Ruien , Huo Meiyi , Liu Yu 
Published: March 2024

Abstract
In order to analyze the transmission characteristics of abnormal discharge current in transmission lines, considering the frequency-dependent characteristics of line parameters, the transmission of abnormal discharge micro-current is studied theoretically and analyzed with examples. Then, ATP-EMTP is used to establish a hidden danger micro-current transmission model for the elevated line, and the micro-current transmission situation is simulated. The influence of frequency and different voltage levels on the hidden danger micro-current transmission characteristics is mainly considered. The results show that the higher the frequency of the initial signal, the larger the equivalent resistance and the smaller the equivalent inductance of the line. The frequency has little effect on capacitance and conductance. The attenuation constant of high-voltage class lines with multiple split wires is greater than that of low voltage class lines with single split wires, and the attenuation constant only increases slightly with the increase of split wires.
An Improved Design for a Heat Sink of a Power Conversion System Adapted to the High Altitude and Cold Environment of the Plateau
Authors: You Xiaolong , Luo Chengdong , Pu Zewei , Hu Jincheng , Zhou Lidan , Yao Gang 
Published: March 2024

Abstract
Currently, there are many studies on power conversion system (PCS) in the industry, but there are few studies on high-altitude and plateau application scenarios. This paper takes the extreme environment of plateau and high altitude as the research background, uses PLECS software to establish a thermoelectric simulation of a three-phase LCL grid-connected inverter, and calculates the total heat loss of the power devices IGBT and diodes in the PCS and the power loss of the grid-connected filter. Combining the overall heat generation of IGBTs, diodes and filters and considering the characteristics of high-altitude extreme environments, two liquid-cooled radiators with different structures were designed to measure the thermal resistance and pressure loss of the two radiators (reflecting Flow resistance) and heat dissipation efficiency are quantitatively calculated. The results show that the heat dissipation performance of the liquid cooling radiator designed by the latter is better than that of the former, verifying that by improving the channel structure and size of the liquid cooling radiator, the thermal resistance and flow resistance of the radiator itself can be reduced, and its heat dissipation performance can be improved.
Probabilistic Voltage Optimization Considering Load Static Voltage Characteristics
Authors: Deng Hongyuan , Jia Yudong , Zhu Yongqiang , Xia Ruihua 
Published: March 2024

Abstract
In the conventional power flow calculation, the load is mostly treated as a constant power node. When the voltage deviation occurs, the static voltage characteristics of the load will change, resulting in the change of the power flow calculation. This situation is more likely to occur in the distribution network with distributed power supply. Therefore, it is very important to consider the static voltage response characteristics of the load in the power flow calculation. In the existing literature, when evaluating and optimizing voltage stability, deterministic indicators are usually used to evaluate the voltage level of the system. In the active distribution network with uncertain new energy output, this method has its limitations. Based on the above analysis, this paper uses the power flow calculation method considering the static voltage characteristics of the load to solve the node voltage distribution of the distribution network system. Considering the uncertainty of new energy output and load, the semi-invariant method is used to analyze the probabilistic power flow. An evaluation index considering the digital characteristics of voltage deviation distribution is proposed. The voltage optimization model is established according to the proposed index, and the genetic algorithm is used to solve the problem. The IEEE33 node standard example is simulated to verify the correctness and feasibility of the proposed method.
Study on the Physical Properties of Hydrogen-Doped Natural Gas Based on Equation of State
Authors: Ouyang Xin , Qin Chuan , Peng Shiyao , He Yuming , Wang Weijia 
Published: March 2024

Abstract
As a zero-emission green clean energy, hydrogen energy is an important means to achieve the strategic goal of carbon neutrality and an important part of the energy Internet. Hydrogen-doped natural gas transportation is an economical and feasible scheme to realize long-distance transportation of hydrogen by using the existing natural gas pipeline network. However, the addition of hydrogen to natural gas will cause obvious changes in the physical properties of the transport medium, which will have a certain impact on the transport characteristics and flow measurement of the pipeline. The main problem is that we need to understand the changes of physical properties after natural gas mixed with hydrogen to ensure the safe operation of natural gas pipe network mixed with hydrogen. Based on this situation, this paper takes BWRS equation as the theoretical basis, selects typical natural gas temperament, calculates and solves the physical parameters of natural gas under different hydrogen blending ratios, and compares them with the standard physical reference values. After verification, the results are used to explore the physical properties of hydrogen-doped natural gas with hydrogen blending ratio, temperature and pressure as variables. The relative average absolute value error (RAAD) of the calculated physical properties of hydrogen-doped natural gas in this paper is less than 2% compared with the reference value of standard physical properties, which can provide theoretical data basis for studying hydrogen-doped pipeline transportation, ensuring pipeline transportation safety and hydrogen-doped natural gas metering.
Research on the Technology of Full Cylinder Concrete Bite Pile of Deep Riprap Cofferdam
Authors: Huang Wenhui , Zhang Jiawei , Wu Yuheng 
Published: March 2024

Abstract
In order to solve the construction problem of deep ripped-rock cofferdam occluding pile under complex geological conditions, this paper studies the occluding pile engineering of Shenzhen-Zhongshan Link Construction pipe prefabrication yard as carrier. The research contents of this paper include the formation of occlusal pile, the reasonable combination of construction equipment, the optimization of concrete mix ratio, the treatment of isolated rock and the demolition of occlusal pile, etc., forming the key technology of the construction of cofferdam concrete occlusal pile under complex geological conditions at sea. Through the construction practice, the application of this technology has obtained a good effect of water sealing, and can provide reference for subsequent similar projects.
Study on the Optimized Matching of VNT and EGR Systems in a Diesel Engine
Authors: Xue Zhentao , Lv Huimin , Liu Yang , Tian Ruixiao , Tang Dong 
Published: March 2024

Abstract
An experimental investigation of the coupling relationship between the VNT (Variable Nozzle Turbine) and EGR (Exhaust Gas Recirculation) systems was carried out in this study on a four-valve common-rail diesel engine in bench tests, as well as a transient optimization of the VNT and EGR control strategies. It was found that the overall level of NOX and flue gas emissions decreased with decreasing VNT opening. When the opening of the EGR valve was in the range of 5%-10%, the NOX and soot emissions could be reduced simultaneously by decreasing the VNT opening; the response of the intake volume was greatly improved by modifying the coordinated control strategy by boosting the control strategy under the acute load step condition; the NOX emission was significantly reduced by 6% overall, and the soot was reduced by 22.8% and the CO2 emission was improved in the transient-optimized WLTC test cycle. Therefore, by coupling the VNT and EGR systems and optimizing them transiently, emissions of pollutants during rapid engine acceleration can be decreased.
The Application and Research of Particle Swarm Optimization Radial Basis Function Network Driven by Edge Computing in Bogie Fault Diagnosis
Authors: Gao Mingliang , Fu Changzhao , Wu Jianguo , Yu Tang , Lu Rongqin , Xi Xin , Wang Yang , Sun Yi 
Published: March 2024

Abstract
The bogie system is a key system that affects the safety and quality of high-speed train operation. Constructing a fault diagnosis model for the bogie system can effectively improve the safety and comfort of high-speed train operation. The traditional modeling method uses the BP neural network to fit the temperature and other parameters of the bogie system. However, because the BP neural network is prone to fall into local minima, slow convergence and poor diagnostic accuracy, this paper proposes a radial basis function network bogie fault diagnosis model based on particle swarm optimization based on edge computing. The model combines edge computing and particle swarm optimization algorithm to improve the accuracy and real-time of bogie fault diagnosis. By implementing model training and inference on edge devices, data transmission latency has been reduced and diagnostic efficiency has been improved. A particle radial basis neural network (PSRB) was designed using a highly convergent particle swarm optimization algorithm, and the parameters of the radial basis neural network (RBF Neural Networks) were optimized using the Particle Swarm Optimization algorithm. Based on the complexity of the input parameters of the bogie system, determine the input and output parameters of the model, and use particle swarm optimization algorithm to search for the optimal values of the basis function center, width, and output layer weight threshold of the RBF neural network. The composite algorithm was applied to the fault diagnosis of the bogie system, and a particle radial basis neural network bogie fault diagnosis model was designed. The simulation and experimental results of the model show that the diagnostic model can effectively improve the identification accuracy of fault diagnosis, with a minimum error accuracy of 0.0255, saving computation time. The computation time is reduced to 2.9 seconds, eliminating the influence of non target parameters on the inversion results. This model can also be used in other systems of high-speed trains and has practical application value.
Potential Environmental Impacts Caused by Sedimentation at the Tambakboyo Retention Basin D.I.Yogyakarta to Fulfill the Needs For Watershed
Authors: Nuranto S , Putri I N , Ustriyati S N , Jayatri F N M , Sembada P T S 
Published: March 2024

Abstract
The use of the Tambakboyo Retention Basin for more than 10 years has led to sedimentation at the bottom of the reservoir due to precipitated particles that are transported along with the water flow. Sedimentation of this reservoir can have several impacts on the environment. This study aims to analyze the possible environmental impacts that could occur in the Tambakboyo Retention Basin through the results of an analysis of the sedimentation rate and volume of water availability that has been carried out in previous studies. The results of previous studies indicate that the sedimentation rate in the Tambakboyo Retention Basin is included in category I or very light. However, several impacts may occur if there is no management, including reduced reservoir water holding capacity, flood hazard, excessive soil enrichment, lack of water so that the reservoir is no longer useful, and can even damage the reservoir. Thus, sediment management efforts need to be carried out, including repairing open land (greening), dredging sediments in the reservoir, and building sediment traps upstream of the reservoir.
The numerical investigation of turbulence and scour interaction around the permeable groynes at the channel bend
Authors: Sisinggih D , Wahyuni S , Rasyid Adenan , Maruf M. F. , Halik G 
Published: March 2024

Abstract
Turbulence, particularly Reynolds Stress, plays a significant role in the flow field surrounding groynes, causing local scour. A limited number of studies have comprehensively analyzed the flow and turbulence structures encompassing a series of groynes in channel bends. This study numerically investigated the interplay between turbulence, sediment deposition, and scouring in a sharp channel bend with permeable groynes. The results show that the inner bank maintained high velocity, while permeable groynes decreased longitudinal velocity near the outer bank. Implementing permeable groynes structures reduced bottom velocity and increased flow separation. Turbulent kinetic energy distribution across the bend, particularly streamwise, influenced scour development more than vertical motion.
Attempts to reduce cavitation phenomena at the Ciawi Dam inlet conduit using CFD Modeling
Authors: Sujono H , Haribowo R , Purwanto T S 
Published: March 2024

Abstract
The conduit bottom outlet is prone to cavitation damage on its channel surface, and one preventive measure is the installation of air ventilation. This research aims to grasp flow characteristics comprehensively, predict cavitation likelihood at the intake, and assess the impact of a ventilation pipe’s installation. Utilizing Computational Fluid Dynamics (CFD), the study modeled flow dynamics, focusing on velocity and pressure variables. The Ciawi bottom outlet intake was meticulously modeled at a 1:1 scale under normal water level conditions, and model accuracy was validated through physical testing by BHGK. The research includes two series: Series 0 (intake without ventilation pipe) and Series 1 (intake with ventilation pipe), with gate opening heights varied at 25%, 50%, 75%, and 100% for both series. Simulation results show that in Series 0, potential cavitation damage is indicated at a 75% gate opening in sections 3 and 4 with a cavitation index of 0.11. Series 1, featuring ventilation pipe installation, demonstrated positive outcomes, eliminating potential cavitation damage in the inlet bottom outlet, with all cavitation indices surpassing 0.2. This study provides crucial insights for preventing cavitation damage in conduit bottom outlets through the strategic deployment of ventilation systems.
Land suitability studies for paddy cultivation in Dadahup Swampy Irrigation Area
Authors: Handoko D , Istiarto  , Karlina  
Published: March 2024

Abstract
The Dadahup Swampy Irrigation Area is crucial in the government’s Food Estate initiative to enhance food security in Indonesia. Following extensive infrastructure improvements, including network rehabilitation and gate construction between 2020 and 2022, a pilot project was initiated in block A5. However, rice yields in this area still need to improve, primarily due to inadequate land management practices. This study evaluates and maps land suitability for paddy cultivation in the Dadahup Swamp Irrigation Area, employing a combination of laboratory data and field research integrated with geographic information system (GIS) technology. Various parameters were considered, such as climate factors (temperature and water availability), soil characteristics (drainage, texture, depth), peatland attributes (thickness, maturity), nutrient content (CEC, base saturation, pH, C-organic), available nutrients (nitrogen, phosphorus, potassium), salinity, alkalinity, pyrite depth, and inundation levels during planting. Then, thematic raster mapping was conducted using the Inverse Distance Weighted (IDW) method, followed by reclassification based on Food and Agriculture Organization (FAO) standards for land evaluation. The result categorized Block A5 into three suitability classes: S1 (highly suitable), S2 (moderately suitable), and S3 (marginally suitable). Approximately 22.5% of Block A5 is highly suitable (S1), 39.5% is moderately suitable (S2), and around 38% is marginally suitable (S3).
Correlational of soil permeability and infiltration rate at the ITERA infiltration drainage development plan
Authors: Kiranaratri AH , Bisri M , Asmaranto R 
Published: March 2024

Abstract
Physical development has an impact on the availability of groundwater. The limited water surface requires humans to manage available wisely. Institut Teknologi Sumatera (ITERA) is a state campus on the Island of Sumatera and has an area of 275ha. The eco-drain concept attempted to recover groundwater at all masterplan development. This study aims to reveal how much influence infiltration rate has on soil permeability in the ITERA Infiltration Drainage Development Plan. This research used quantitative research using a correlational approach by processing primary data and further analyzing it in the soil mechanics laboratory at the 8 points of the equal research location. Infiltration rate data was obtained using a double-ring infiltrometer and analyzed with the Horton Method, then the sampling at a depth of ±50 cm analysis with the Falling Head Method. Based on the result, there is no correlation between both tests and resulted in different soil types. The infiltration rate test result of the soil type is loamy sand – sandy loam with moderately – moderately slow infiltration classification. The soil permeability type is fine sand or silty clay with medium and low permeability, and the infiltration rate only affected 37.6% of the permeability soil result.
Hydrogeology of the small island: a case study of Pisang island, West Coast Regency, Lampung province
Authors: Sinaga S M , Hendrayana H , Laksono G J 
Published: March 2024

Abstract
Pisang Island has an area of 1.5 km2. The issue on small islands pertains to the quality and quantity of water. This is related to an increasing population and growing water demand. This research aims to address the sustainability of water resources. Therefore, a hydrogeological concept is required to assess and predict potential water resources to maintain the quality and quantity of water. The methodology used in this research includes geological mapping, measurement of rock resistivity, hydrometeorological analysis, and water quality testing. The research indicates that the lithologies of Pisang Island calcareous gravelly sand, calcareous sandstone, and porous limestone. The aquifer system on Pisang Island is unconfined. The aquifer was spread throughout the island with varying thicknesses. The lithology of calcareous gravelly sand is found in the island’s northern part, with a thickness ranging from 15 to 90 m. Calcareous sandstone is located in fold slopes of 3 to 5 m thickness. Porous limestone is distributed across the island, with a 30–170 m thickness. Pisang Island has an annual rainfall of 3,101.93 mm/year, evapotranspiration of 2,017.91 mm/year, and infiltration of 511.23 mm/year. The groundwater flow pattern moves from high elevations in hilly areas to low elevations in coastal areas.
Determination of priority areas for the development of groundwater utilization in Pangandaran Regency
Authors: Addina A I , Abduracchman F , Yugamaris G 
Published: March 2024

Abstract
This research has the goal of determining priority areas in the Pangandaran Regency, which are the main priority in developing groundwater utilization. This research uses the Groundwater Potential Index (GPI) method, which is modified to suit the research area, and adds aspects of groundwater utilization parameters to find priority areas for developing groundwater utilization. In determining groundwater development priority areas, data from remote sensing and Geographic Information Systems (GIS) are needed, which are processed using the GPI and Analytic Hierarchy Process (AHP) method. This study uses eight parameters, including fracture (F), lithology (L), drainage (D), topography (T), rainfall (R), water utilization, land use, and population. The results of the analysis show that in areas with moderate levels of drought, there is still the possibility of groundwater potential, and it can be developed according to the level of water utilization. It was also found that the relationship between areas with very high groundwater potential and groundwater utilization will have the highest priority value in developing groundwater utilization. The estimated areas are divided into five zones: very high is 21.92 km2; high is 161.83 km2; medium is 407.87 km2; low is 502.45 km2; and very low is 7.07 km2.