bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Distributed PV Monitoring System Based on Ubiquitous Power IOT Architecture
Authors: Wang Dingmei , Zhou Qiang , Du Yuze , Dong Haiying 
Published: January 2022

Abstract
There are problems of low intelligent management and automatic maintenance of traditional distributed PV power plants. This paper designs a distributed PV monitoring system based on ubiquitous power IoT architecture. LoRa edge computing terminal, Storm data stream processing strategy and Spark in-memory programming model are introduced to meet the needs of distributed PV power plants for fast access and storage, analysis and mining of big data. This system improves the real-time and security of power plant data cloud-edge collaboration, and can efficiently perform status monitoring, maintenance management and data analysis of distributed PV power plants. It is of practical significance to improve the whole life cycle management of distributed photovoltaic power generation equipment and promote the transformation of operation and maintenance mode to automation, intelligence and intensification.
Research on Simulation Method of UHVDC Corona Discharge
Authors: Li Zhuqing , Qin Zhimin , Li Xiaoguang , Liu Yingyi , Hui Huang , Feng Huang , Liu Yuanqing 
Published: January 2022

Abstract
Ultra high voltage direct current (UHVDC) transmission has took a significant part in power grid. However, the increase of transmission efficiency hindered by electromagnetic environment problems caused by its corona discharge. Therefore, the corona discharge of UHVDC transmission line has been spotlighted. Considering the complex reaction of microscopic particles in the air during the discharge process, this paper integrates each split conductor as a discharge source located on the split centerline, and simplifies the discharge of the transmission line into a one-dimensional model of a coaxial cable. The study can help us to explore the physical process and microscopic particle motion characteristics of corona discharge deeply. Besides, it is an important guideline for studying and preventing electromagnetic environment problems from the root cause.
Study on Ground Potential Distribution Caused by Subway Operation
Authors: Tang Yuhang , Ni Yanru , Yu Kun , Zeng Xiangjun , Zhuo Chao , Han Wei 
Published: January 2022

Abstract
Urban rail transit has become an important basic public transport facility, is of great significance to urban development and economic construction. During the operation of subway locomotive, stray current will flow into the earth, resulting in the change of soil potential. Thus, it will lead to the neutral point grounded transformer DC bias and buried metal corrosion. Firstly, based on COMSOL finite element simulation software, a composite layered soil model was constructed to simulate the real soil environment. Secondly, according to the rail current distribution of two-terminal power supply, the stray current distribution model was constructed with locomotive position changing. Finally, the potential changes of grounded transformer and buried metal during subway operation was simulated. The research showed that the soil potential distribution change rate is related to the subway locomotive location. When the locomotive position is determined, the induced potential changes more rapidly in the higher soil resistivity, and there is a step change of potential at the soil layer boundary.
Method for Line Selection of Single-phase Arc Grounding Fault in Distribution Network Based on Extracting Fault Arc Characteristics
Authors: Li Shilong , Su Xueneng , Gao Yiwen , Long Cheng , Yang Yongbo 
Published: January 2022

Abstract
Single-phase arc grounding fault is the most important fault form of the medium voltage in distribution network. Once the arc grounding fault occurs, the faulty point generates an arc, and the system generates an arc grounding over-voltage, so it is very necessary to analyze the faulty arc. The faulty arc current has obvious “zero rest phenomenon” at the zero point, and the voltage at this time rises suddenly. This characteristic can be used to analyze the fault. This paper analyzes the current of the faulty arc in MATLAB/Simulink, and extracts transient information of arc current through wavelet transform. According to the singular characteristics, the line selection is carried out by comparing the maximum value of the fourth scale of zero-sequence current of fault line and non-fault line under different “zero rest ratio”. The result shows that the extraction of the arc feature is participating in the arc grounding fault to correctly select the fault line, and the principle is reliable, accurate and suitable for distribution networks in different grounding methods.
Design and Research on the Automatic Online and Offline System of Live Working Robot on Transmission Lines
Authors: Zou Dehua , Fan Shaosheng , Peng Shasha , Liu Lanlan , Jiang Zhipeng , Jiang Wei 
Published: January 2022

Abstract
It has important theoretical significance and practical application value to improve the work efficiency and reduce the hazard of personnel work through the assistance of the robot for the live work of the transmission line instead of manual work. However, in the actual application process of the robot, it takes a lot of time, manpower and material resources to go online and offline, and the overall efficiency of the robot is greatly reduced. In view of the above problems, this article proposes a design scheme for an automated online and offline system for a live working robot. First, the principle of robot online and offline is analyzed in detail, the basic configuration and physical model of the automatic online and offline system are designed, and the operation motion plan of the robot online and offline system is given. Finally, through the system integration design, a physical prototype system for the automatic online and offline of the live working robot was developed, and the feasibility and effectiveness of the device application and the automatic online and offline of the power transmission line robot were verified. Compared with the traditional way of online and offline, the research in this article has broken through a bottleneck problem that restricts the application of robots and it has a powerful role in promoting the practical process of live working robots.
Electromagnetic Radiation Monitoring and Rescue Equipment Based on Communication
Authors: Chen Shuona 
Published: January 2022

Abstract
In case of electromagnetic radiation pollution caused by an accident, it is necessary to monitor the accident site at to facilitate rescue personnel to carry out rescue operations in time according to the site conditions. The technical problem to be solved in this paper is to overcome the defects of the existing technology and provide an electromagnetic radiation monitoring and rescue equipment based on communication. We connect the control host with the remote to observe the rescue area remotely. When an abnormality is found, a reminder will be sent to ensure the life safety of rescue personnel. When an injured person is found, the on-site rescue workers can be notified to facilitate the rescue work.
Research on Batteries Equalization Method for Power Grid Energy Storage
Authors: Zhao Guangjin , Hu Yuxia , Dong Ruifeng , Zhao Dawei , Lyu Nawei , Zhang Wenfei 
Published: January 2022

Abstract
In recent years, with the continuous promulgation of relevant national energy storage strategies and policies and the rapid development of electrochemical energy storage technology, energy storage systems are being used more and more widely in power grids. Lithium-ion batteries have become the main battery for energy storage system applications by virtue of their high energy density, high cycle times, low self-discharge rate and low environmental pollution. In grid energy storage applications, it is often necessary to connect a large number of batteries in series and parallel to meet capacity and voltage requirements, which can lead to the amplification of very small differences in parameters between individual batteries and accumulate during charging and discharging work, eventually causing a decrease in the energy efficiency of the battery pack, a decrease in service life, and even explosive accidents. The equalization technology can well improve the imbalance problem caused by the inconsistent performance parameters between single cells, and has become a hot spot for research in recent years. In this paper, based on the analysis of battery characteristics and the characteristics of energy storage applications, we design an equalization current algorithm for battery pack under charging and discharging conditions, and design a bi-directional equalization circuit for single battery equalization, and use a modular structure and combine the current equalization algorithm to give a design scheme for a series battery pack equalization system.
Research on Explosion Characteristics of Prefabricated Cabin type Li-ion Battery Energy Storage
Authors: Tao Fengbo , Yin Kangyong , Liang Wei , Huang Haosheng , Lin Yuandi , Song Yuhang 
Published: January 2022

Abstract
Lithium iron phosphate batteries have become the main choice for energy storage units in electrochemical energy storage due to their high safety, excellent electrochemical performance, long cycle life, and environmental friendliness. However, lithium-ion batteries inherently have safety risks. The thermal runaway of a single battery in a closed space may cause a chain reaction of surrounding batteries, and may ignite the generated combustible gas, causing serious explosion accidents. In this paper, the explosion characteristics under different initiation points of pressure relief plates are studied. The results show that the peak overpressure variation range of different detonation points in the prefabricated chamber is 1∼1.6 times the hatch opening pressure, where the peak overpressure of the detonation at the near end of the hatch is lower than that of the detonation at the distal end, reflecting the role of the detonation when the explosion energy is released to the outside of the chamber earlier. The above study can provide a reference basis for the safe operation of prefabricated cabin type energy storage power plant and the promotion of its application.
Structural Analysis and Optimization of Steel Pin on Cylindrical Head Suspension Porcelain Insulators
Authors: Xu Hua , Zhou Yangyang , Yin Jungang , Zhang Ruiqing , Li Chao , Wang Senlin , Yi Fuming 
Published: January 2022

Abstract
There is no essential difference in theory between the inner and outer insulating properties of cylindrical and conical head disc suspension porcelain insulators. Compared with a conical head porcelain insulator, a cylindrical head porcelain insulator is significantly lighter in weight, which can effectively reduce the mechanical load of the tower and wire; and it has better dispersion and adjustment capabilities for changes in material properties over time, so that the product is not subject to excessive and uneven stress over a long-term. In order to improve the mechanical performance of cylindrical head insulator products, this paper establishes a parameterized fine simulation model of the steel pin without changing the geometry of the insulator iron cap and porcelain body. The finite element method is used to calculate and analyze how the geometric parameters of the steel pin influence insulator mechanical properties, which can provide design reference for further product optimization.
Research on Optimization of Tube Structure of Phase Change Heat Storage Device
Authors: Bai Haojiang 
Published: January 2022

Abstract
In view of the low heat transfer efficiency of the phase-change heat storage device and the inability to quickly respond to temperature changes, the fluid tube structure in the heat storage device was optimized, and four types of structures: circular structure, square structure, regular hexagon structure and regular triangle structure were compared and studied. Numerical simulation and optimization analysis are carried out on the pipes with the same thermal fluid circulation area but different sizes. The simulation results show that the triangular structure has the highest heat transfer efficiency in the initial stage of heat transfer due to the longest perimeter, and the heat transfer efficiency is positively correlated with the perimeter under the heat transfer mode in which heat conduction is the main body. Under the heat transfer mode dominated by convective heat transfer in the later stage of melting, the time required for the complete melting of phase change materials outside the square tube is the shortest.
Research on Ultra-short term Forecasting Technology of Wind Power Output Based on Wake Model
Authors: Wang Yiying , Shen Runjie , Ma Yanhong , Ma Ming , Zhou Qiang , Lu Qingquan , Zhang Jianmei 
Published: January 2022

Abstract
The concept of sustainable development promotes the development of new energy power generation industry. At the same time, in the field of wind power, wind curtailment and power limit gradually appear, and the output prediction of power plants has become one of research hotspots. Because of the wake effect between wind farms, the wind speed of the wind tower can not represent the real numerical value. Therefore, in this paper, we established various wake models of wind farm group under different wind direction to modify the wind speed of wind tower and get more accurate results. We also used the Long Short-Term Memory network (LSTM) to forecast the wind farm output, and finally obtained excellent forecast results. Compared with traditional prediction algorithm, it had improved the prediction accuracy.
A Review on Decision-making Methods for Restoration Control of Transmission and Distribution Systems
Authors: Yuan Guichuan , Li Ze , Zheng Yuxin , Su Fu , He Zhihua , Yu Chen 
Published: January 2022

Abstract
Power system blackouts can’t be avoided fundamentally, so it is of great significance to realize the adaptive and collaborative restoration control of transmission and distribution system to improve the power system blackout defense capability. In this paper, the existing researches are summarized from three aspects, i.e., decision-making of transmission system restoration control, decision-making of distribution system restoration control, decision-making of transmission and distribution coordinated restoration control, the research difficulties are expounded, and the future research directions are prospected. In view of the characteristics of multi-level, cross-regional, multi-stage and strong uncertainty of collaborative restoration control of transmission and distribution systems, it is pointed out that the establishment of restoration decision support system by comprehensive application of optimization algorithms, expert rules and numerical simulation programs is an important mean to realize adaptive restoration control.
Feasible Region Evaluation of Urban Industry Development for Achieving the Carbon Peak and Neutrality
Authors: Li Bingjie , Hu Xiaoyan , Li Hu , Wang Sheng , Chen Hao , Ma Yahui , Zou Fenghua 
Published: January 2022

Abstract
The carbon peak/neutrality is one of the most concerning matters recently for both government and energy enterprises. With the establishment of new low-carbon-orientated policies, the development of urban industries should be comprehensively reviewed. For achieving the carbon peak and neutrality, this paper proposes techniques to forecast the carbon emission for the industry sector, and evaluate the feasible region of the urban industry development. First, an improved STIRPAT model is developed to analyze the relations between carbon emission and various impact factors. Then, the carbon emission of the industrial sector is forecast. Moreover, an optimization model is developed to analyze the feasible region of different factors around the forecast point. Finally, the industries in Suzhou are analyzed as an example to validate the proposed technique.
Analysis of the Application and Control of the Distributed Energy Storage System in Microgrid
Authors: Zhang Shishuai , Xia Binqiang , Zhang Dongchen , Zhang Chengbing , Liu Yuhang , Zhou Mingzhen , Wan Peng , Lu Liping 
Published: January 2022

Abstract
Because of the intermittence and randomness of renewable energy and the continuous variability of load. By configuring a certain capacity of energy storage in microgrid, the active and reactive power throughput can be flexibly and quickly adjusted to smooth load fluctuations and reliability of power supply improvement. It can improve the power quality and keep the system stable. Therefore, the application potential of distributed energy storage system in microgrid and distribution system is huge. In terms of give full play to the performance advantages of energy storage through distribution system, it is necessary to study the core technologies of modular integration, topology, capacity design and control of energy storage through distribution system. The feasibility and value of energy storage through distribution system in power system engineering are demonstrated. Based on the analysis of relevant requirements, a energy storage through distribution system based on micro energy storage unit is proposed in this paper. This structure is very suitable for energy storage components to be connected to the micro-grid to achieve plug and play, high efficiency, high reliability and high flexibility of energy storage system applications.
Carbon Emision Accounting Model and Multi-dimensional Evaluation of Power System with High Proportion of New Energy
Authors: Yue Yunli , Wang Quan , He Lei , Yue Hao 
Published: January 2022

Abstract
The construction of novel power system with high proportion of new energy is considered to be an important way to achieve carbon reduction. In this paper, the carbon emission accounting model and multi-dimensional evaluation are proposed to promote the establishment of power system with high proportion of new energy. Firstly, the STIRPAT (Stochastic Impacts by Regression on Population, Affluence, and Technology) carbon emission accounting model is established in this paper to analyze the influencing factors of energy carbon emission in a certain region. Then the basic characteristics of the novel power system with new energy is presented. Finally, the multi-dimensional evaluation model of power system with high proportion of new energy is put forward to clearly assess the construction process of the novel power system.
Equipment Modeling Technology in Power Internet of Things
Authors: Qiao Zhu , Meng Jie , Zhang Haoqi , Hou Jixin , Ma Dechao , Liu Xiaohu , Liu Chen 
Published: January 2022

Abstract
With the advancement of smart IoT system, equipment modeling technology that adapts to the power Internet of Things becomes more and more important. In the power grid system, various types of equipment access processes are not standardized, the collected data format is not uniform, and the data is difficult to share. There is an urgent need to build a set of equipment modeling methods suitable for the power Internet of Things. By comparing traditional equipment modeling methods, we propose the static modeling structure of equipment in the power Internet of Things, and constructs a description method of terminal equipments on the cloud platform; combined with the construction requirements of the smart IoT system, design the Cloud-side collaborative dynamic modeling technology which based on equipment online status management, resource status management, alarm management and application management. At the same time, integrated equipment management methods for static modeling and dynamic modeling are realized in combination with application cases, providing technologies basis for unified device access, unified data transmission, and open sharing of data.
Research on Main-auxiliary Combination Technology of New Generation Smart Substation
Authors: Yang Shanglin , Liang Xudong , Pan Hongxiang , Zhou Bin 
Published: January 2022

Abstract
Combined with the development status of smart substation secondary systems, this paper introduces and analyzes the future development direction of substation secondary system intelligence. Based on the evolution of the main and auxiliary control function and structure of substation, the main and auxiliary combination control structure and control process are described. At the same time, from the perspective of the main auxiliary integrated control architecture of the next generation smart substation, this paper summarizes the different types and mothod of main auxiliary linkage, as well as the improvement effect of main auxiliary combination on substation intelligence.
Leakage Detection Based on CEEMDAN Analysis for Hydraulic Cylinder Using Acoustic Emission Technique
Authors: Zhang Peng , Chen Xinyuan , Cheng Zhiwen 
Published: January 2022

Abstract
The early internal leakage fault characteristics in hydraulic cylinder are very weak and vulnerable to environmental noise, which makes the early internal leakage fault detection very difficult. In comparison with internal leakage detection by the pressure signal, internal leakage by Acoustic emission (AE) signal has higher sensitivity and accuracy. So this paper adapts the algorithms combining complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) and auto regressive (AR) spectrum. Comparing with the mean value of first intrinsic mode function (IMF1) instantaneous amplitude based on EEMD, The experimental results verify the proposed algorithms based on CEEMDAN distinguish different internal leakage levels obviously and has better performance.
Synthesis of zeolite catalyst for palm oil cracking process by means of microwave induced local kaolin leaching
Authors: Shoelarta S , Haryati A F , Suminar D R 
Published: January 2022

Abstract
Kaolin mined in Belitung Indonesia mostly consists of SiO2 and Al2O3 and is better off calcined at a temperature of about 700 °C for at least 2 hours to be reactive. This research is conducted to observe the effect of implementing microwave irradiation in the leaching process as the most crucial step in the hydrothermal synthesis of a zeolite catalyst, using a leached metakaolin (LMK) as the source of SiO2. The irradiation of microwave certainly outperforms the conventional leaching process of Metakaolin, as expected in the hypothesis. The modification of the microwave oven with the addition of a hole on the top chamber and alteration of the waveguide is conducted to improve the focusing of electromagnetic radiation onto the extraction column. Installation of the faraday cage gives rise to better polarization, not to mention a safer procedure. The conventional leaching of 25 grams of Metakaolin undertaken in the previous year takes 45 minutes to complete, while microwave-assisted leaching takes only 30 minutes or 30% more efficiently. The acid solution used in leaching undergoes electromagnetic influence that increases the dipole and polar reactivity and raises the acidity of the raffinate or catalyst by more than 15%, which is necessary for the cracking process catalyst. The starting materials consist of silica, alumina, Na2O, distilled water with a quantity of silica in the seed smaller than silica in the LMK and the minute amount of impurities, mainly common dirt of soil. The power consumed by the magnetron to irradiate the microwave was set at 450, 600, and 800 W, respectively. The appearance and size characterization of the produced zeolite catalyst was conducted using SEM (Scanning Electron Microscope). Meanwhile, the acidity characterization as the highlighted focus is carried out by applying Hammett’s indicator titration of ammonium solution. A rise of acidity up to 25% or 0,71 (mmol NH3/gr) from 0.63 (mmol NH3/gr) in conventional method.