bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of the Disconnection Fault Detection System for Low Voltage Cable in Power System
Authors: Wang Bochuan , Wu Xixiu , Zhou Wei , Hu Yunfeng , Li Chao , Tang Jinrui 
Published: July 2019

Abstract
The paper proposes a designed scheme for the fault detection system of low voltage cable breakage in power system. By analyzing the characteristics of low voltage power line communication channel, establishing the channel characteristic model and comparing the measurement data with the simulation model, the author summarizes the impedance characteristics, noise characteristics and attenuation characteristics. It can be concluded that the suitable frequency range for communication is between 120kHz and 20kHz. The signal modulation method is studied, that the spread spectrum modulation is a preferred method. It also shows good results in the simulation. The object testing is done. The device and test method selected by author can be used to realize the early warning function of the power system low-voltage cable disconnection fault.
Design and Application of Portable Fault Indicator Detector Based on Internet of Things
Authors: Qiufeng Long , Yi Wen , Xiaobing Xiao , Lingcheng Feng , Shihua Xu , Wei Zhang 
Published: July 2019

Abstract
In order to solve the problem of detecting the fault indicator in the field, a design scheme of the portable fault indicator detector based on the Internet of Things is proposed. Firstly, the overall architecture of portable fault indicator detector based on Internet of Things is designed. Secondly, the system architecture of portable fault indicator detector is designed from two parts and seven aspects. Then, the hardware architecture of UPS power module, AC power amplifier module and human-computer interaction module is designed in detail. Finally, the main functions and detection methods of the portable fault indicator are discussed. The case analysis shows that the portable fault indicator detector based on the Internet of Things has greatly improved the time, manpower and cost of detection compared with traditional detection methods, and can conveniently meet the needs of on-site inspection personnel.
Status Detection Evaluation Method of Distribution Network Fault Indicator Based on Artificial Intelligence
Authors: Qiufeng Long , Qiansu Lv , Xiankui Wen , Shaolin Wen , Jianhui Wu , Wei Zhang 
Published: July 2019

Abstract
In order to solve the problem of status detection evaluation of field operation fault indicator, a status detection evaluation method of distribution network fault indicator based on artificial intelligence is proposed. Firstly, the fault indicator status detection evaluation model is established, and the result information of fault indicator detection using portable detector is described by fault indicator status detection information matrix. Secondly, based on the principle of “3 selection 2”, the fault indicator status detection comprehensive result table is established. Then, the same factory fault indicator status detection evaluation matrix and the fault indicator single state detection comprehensive evaluation matrix are established to evaluate the 10 functional detection results of a single fault indicator of a manufacturer. Secondly, the fault indicator sub-detection comprehensive evaluation matrix is established to describe the evaluation results of all fault indicators in the same plant on different sub-function detection. Finally, the comprehensive evaluation results of all fault indicator detection in the same plant are evaluated by means of the average method. The example analysis shows that the method described in this paper can evaluate the status detection results of fault indicators from three aspects: individual, sub-item and comprehensive, which has good practical significance.
Research on Multiple Security Authentication Schemes for Mobile Applications of Power Trading Platforms
Authors: Shi Shuhong , Wang Lei , Zheng Shiqiang , Lv Jingwei , Zhang Qian 
Published: July 2019

Abstract
The development of mobile technology and the Internet has brought many potential threats while bringing convenience to users. Aiming at the leakage of private data and transaction sensitive information in mobile trading market, we study the multi-security authentication support technology of mobile transaction mobile application, and analyse the common mobile application content, document protection technology and mobile signature protection technology. Based on the identity authentication technology of mobile application and the security considerations of members and transaction data in the power trading market, an identity authentication technology using SMS verification code, mobile phone shield, face recognition and fingerprint identification is proposed to protect the mobile transaction mobile application transaction. Anti-leakage of market member privacy data and transaction-sensitive information. In order to verify the effectiveness of the proposed scheme, we carry out the simulation experiment. The experimental results show that the proposed scheme can effectively protect the privacy of users.
Research on Smart Safety Electronic Fence Technology Based on Image Processing
Authors: Qin Liu , Minkun Wang , Kehang Xu , Jiawei Zhang , Junhu Xie , Jiong Chen 
Published: July 2019

Abstract
With the development of scale of the power grid, the phenomenon that the construction personnel across the safety fence at will occurs frequently, which brings great hidden trouble to the safety production. In allusion to the existing problem of the safety fence without monitoring and alarm function, in which the principle of inter-frame difference method is used to screen out the illegal workers, making accurate diagnosis of the illegal behavior, and sending warning information to remind the illegal workers by using the method of trajectory tracking of moving object to filter out the random disturbance signal, so as to ensure the safety of the construction.
Research on Energy Optimizing Management Technology of Submarine Cable Salvage Robot
Authors: Hao Zhang , Xin Shi , Rong Li , Sun Li , Yubing Duan , Xiaoli Hu , Hui Liu 
Published: July 2019

Abstract
In the design of submarine cable salvage robot, considering the limitations of weight, space, cost and many other factors, the robot can only carry energy storage devices with limited capacity. In the process of dynamic regulation, current sharing technology is used to ensure safe operation. In the steady state operation, through the optimization of load distribution scheme, the optimal control of overall efficiency of energy storage device can be achieved, the utilization efficiency of storage energy can be improved, and the overall operation performance of electrical system can be improved
Application Research of 35kv Switching Shunt Capacitor Banks with Phase-Controlled Circuit Breakers
Authors: Wu Guoxing , Zhang Jingzhuo , Wang Peng , Liao Weixing , Ji Xinchi , Lai Zhenyu 
Published: July 2019

Abstract
In recent years, two series reactor faults occurred when a 35kV shunt capacitor bank was cut by a circuit breaker in a 500kV substation in Shenzhen. The reason is analyzed that the large inrush current and overvoltage generated during the switching process caused interturn short circuit fault of the reactor, which seriously threatens the safe operation of the system. To avoid such faults, intelligent phase-controlled short-circuit breakers were used to suppress the closing inrush current and reduce the probability of reignition. To verify the effectiveness of the technology, this paper introduces the causes of switching inrush current and over-voltage and the principle of phase-controlled suppression technology, and then applies the technology to a 500kV substation in Shenzhen. Multiple switching tests are carried out on the intelligent and ordinary circuit breakers respectively. The results show that the maximum inrush current generated by the ordinary circuit breaker is 4.2p.u., and the overvoltage is 1.81p.u. While the maximum inrush current of the intelligent phase-controlled circuit breaker is 2.3p.u., and the overvoltage is 1.4p.u. The results confirm that the application of the intelligent phase-controlled switching technology can suppress the inrush current and overvoltage, thus fundamentally improving the reactive switching efficiency and system safety.
Study on Tree-wire Critical Breakdown Distance of 500kV Transmission Lines
Authors: Liu Zhenyao , Guo Rong , Kang Yubin , Chen Xuan , Fan Xiaodong , Wang Yang 
Published: July 2019

Abstract
Flashover fault is an important cause of trip or even outage of transmission lines. In order to reduce the occurrence of tree flashover failure and strengthen the management of tree growth in the transmission line corridor, it is necessary to study electric field and potential distribution characteristics of trees below transmission lines. Firstly, the influence of tree dielectric constant and conductivity on 3D modelling is analysed. Then the actual 3D simulation model is established. The spatial electric field and potential variation of trees with different shape crowns and different heights and horizontal distances are studied. The starting field strength of flow is used as the gap breakdown criterion, and the critical breakdown distance under different power supply phase angles is calculated. Conclusion shows that the critical distance of tree flashover of 500kV transmission line is 1.76m. In practical applications, trees should be avoided too close to the wire.
Analysis and Treatment of the Deterioration Products of Fire-Resistant Oil
Authors: Ya’nan Hao , Naihai Yu , Guodong Qi , Jiafeng Qin 
Published: July 2019

Abstract
The 300 MW unit of a power plant is resistant to fuel, and its color is reddish brown. The acid value and resistivity are in line with the standard requirements. However, a large amount of sludge appears in the same grade of oil, causing the filter to be blocked and unable to supply oil. After the oil is filtered by the online oil filtering device, the degraded anti-fuel oil and the new oil are mixed and there is still sludge. In order to solve this problem, the components in the anti-fuel oil were tested and the acid value, moisture, resistivity, particle size and sludge precipitation test were tested. The cause of the sludge in the mixed oil was found and the treatment method was found. The oil samples were adsorbed by diatomaceous earth, activated clay and strong polar silica-alumina, and the parameters were analyzed after treatment. It was found that both activated clay and polar silica-alumina adsorbent have better purification functions, but the polar silica-alumina adsorbent is better and effectively solves the problem of fuel resistance degradation.
A Study of Over-modulation Impact on the MSI Series Micro-Grid Output Voltage
Authors: Ding Yingjie , Wang Xinggui , Yang Weiman 
Published: July 2019

Abstract
In order to analyse the over-modulation technique impact on the micro-source inverter (MSI) series micro grids (SMGs) output voltage, firstly Double Fourier method applied to derive the single inverter output voltage characteristics under over-modulation condition; Secondly, based on the characteristics of the MSI series micro-grids, a new formula of the system output voltage is derived. Thirdly, the impact on the system output voltage fundamental component and harmonic component is analysed in detail, the results show that the output voltage fundamental component increases with the increasing modulation while keeps constant after a certain over-modulation depth. Finally, a simulation was carried out and the simulation verified the theoretical analysis.
Load Curve Modeling Based on Behavior Analysis of Distributed Power Customers
Authors: Han Xinyang , Zhang Yu , Jiao Yuqiao , Zhang Yue , Qu Yanjing , Ding Min 
Published: July 2019

Abstract
As renewable power generation directly affects the customers’ traditional electricity behavior and then offsets the power load, this paper proposes a load curve modeling method for renewable power customers based on the behavior analysis. Firstly, customers’ active behavior is represented by the quantity of active customer households. Based on the analysis of customer behaviors, a modeling method for the quantity of active customer households is proposed based on Markov Chain Monte Carlo method. Then, with the inputs as the quantity of active customer households and time of photovoltaic power generation, an inference model based on fuzzy logic is proposed to get the quantity of customer household starting electrical appliances. By combing the average usage time of electrical appliances, load characteristics are analyzed based on usage state of electrical appliance of distributed power customers. Finally, the simulation results verify the effectiveness of the proposed method.
Research on Suppression Technology of Electromagnetic Interference in CAN Communication
Authors: Li Weibo , Xu Cong , Li Wei , Li Qi , Lu Yue 
Published: July 2019

Abstract
CAN communication is a relatively common communication method used in the industrial and automotive fields. It analyses the main cause of communication interference in the electromagnetic interference phenomenon of CAN communication in industry. Due to factors such as circuit imbalance and space electromagnetic field, the CAN bus will cause common mode interference due to radiation. The strong interference generated in the field may cause the relay to malfunction and cause the wrong signal. Therefore, this paper proposes protection measures against the malfunction of the relay from the perspective of signal input and relay triggering, and has strong anti-interference ability after testing in actual projects.
Short-term Power System Maintenance Scheduling with Imperfect Repair
Authors: Xu Bo , Xu Shenzhi , Zhang Yumin 
Published: July 2019

Abstract
Most of the existing research in short-term power system maintenance scheduling assumes that repair is minimal when equipment fails. However, this may not always be the truth because sometimes repair after failure is imperfect. This paper investigates the impact of imperfect repair on power system maintenance scheduling. Unlike previous research which didn’t consider imperfect repair, a condition-based maintenance optimization model is proposed. The model focuses on equipment deterioration failure. Firstly, a new equipment state-space diagram under imperfect repair is given. And then, the availability of power equipment considering maintenance schedule and imperfect repair is derived using the Markov process theory. Based on that, in order to determine the optimal equipment maintenance schedules, the expression of system outage cost is given. Finally, system outage cost is minimized to optimize equipment maintenance schedules. A case study is used to illustrate the effectiveness and significance of the proposed model.
Test and Simulation of Potential Distribution of UHV AC Arrester under Different Conditions
Authors: Zhang Pipei , Shi Wei , Wang Hui , Sun Jingwen , Wang Peng 
Published: July 2019

Abstract
UHV AC arresters will be degraded to varying degrees due to the operating environment, including long-term moisture, breakdown and short circuit of the resistor, which makes the increasing unevenness of potential distribution, leading to a larger area of damage and even a safety accident such as arrester explosion. Hence it’s need to analyze the potential distribution of arrester under different conditions. This article carried out a series of tests of the potential distribution of UHV AC arresters when partial damp and partial short-circuit using optical fiber current method, and established the corresponding ANSYS 3D simulation model according to the actual structure and the test method, which is used to calculate the potential distribution under the corresponding test conditions. The consistency of the test and simulation results verified the correctness of the simulation model.
Simulation of Influence of Generator Leading Phase Operation on Voltage and Loss of Gansu Power Grid
Authors: Zhang Yuze , Tong Xinyu , Xu Suping , Sun Yuning , Cheng Rui 
Published: July 2019

Abstract
Generator leading phase operation can not only absorb excess reactive power under small load operation mode, but also smoothly regulate grid voltage to cope with abrupt changes in grid operation. Based on the summer small load typical operation mode of Gansu Power Grid, four calculation conditions are selected to calculate power flow, and the influence of generator leading phase operation on grid voltage and loss is simulated and analyzed. The simulation results show that no matter how the active power output distribution of generators changes in the power grid, the voltage level of the power grid under small load can be significantly improved by generator leading phase operation. However, the grid loss will increase when the generator is in leading phase operation.
A Review of Price Risk Management in PJM and Nord Pool Electricity Market
Authors: Wang Ning , Zheng Wei , Chen Hao , Tu Teng , Yang Yang , Ding Yi 
Published: July 2019

Abstract
Market participants and system operators are faced with price risks caused by various factors, such as congestions or market power abuse. Therefore, the price risk management in deregulated market environment is of great importance. In this paper, various risk-hedge financial instruments in PJM and Nord Pool, such as FTRs, futures, forwards and CFDs are investigated. These risk management mechanisms can be further utilized for congestion revenue allocation, speculation or arbitrage under different market circumstances.
Autonomous mobile robotic system “Sesarma”
Authors: Abbasov I B , Ignatyev V V , Orekhov V V 
Published: July 2019

Abstract
The present paper is dedicated to computer modeling of the autonomous mobile robotic system. The review of publications and analogues is performed; the structure diagram and design of the developed robotic system are presented. The search for a robot body concept is carried out; a stage-by-stage process of its three-dimensional modeling is presented. The body lines are created using a high polygonal modeling method. The process of setting and assignment of materials based on polygonal model elements is described. A renderer is selected and light sources are installed, final scenes of scene rendering with robot are shown.
Defining boundaries of CNC turning efficiency
Authors: Abrazhenin A A , Trushin N N 
Published: July 2019

Abstract
The study considers the problem of defining the quantitative value of design complexity of a general mechanical engineering workpiece through the analysis of its three-dimensional electronic model in the absense of statistical data on similar workpieces. During machine-building preproduction there is a need for quick assessment of design complexity of the developed product. Such assessment allows defining the design cost, determining the performance level of a designed workpiece, creating complexity priorities to split the processing operations between manual and NC machines.
Ultrasound application for detection of inhomogeneities in two-layer sheet
Authors: Afanasenko V G , Boev E V , Kulakov P A 
Published: July 2019

Abstract
The paper presents data on the influence of additives of the pre-treated aluminium oxide powder on the structure of cast lead-tin-based bronzes. Different quantities of the modifier, based on the superdispersed aluminum oxide powder, were added to the bronze melt. The studies have shown that addition of a small amount of aluminum oxide powder (0.07…0.25 %) allows modifying the microstructure of the obtained castings. This modification includes grain refinement, reduction of the matrix dendrites size of tin solid solution in copper, as well as formation of spherical inclusions of the low-melting phase – lead. In this case, the addition of such modifier influences weakly the morphology and the quantity of solid eutectoid inclusions based on electron compound Cu31Sn8.
Study of water-oil mixture separation in bottomhole area via drift flow model
Authors: Almukhametova E M , Karimova A A , Almukhametov F F , Gabdrakhmanov N Kh , Gabzalilova A Kh , Garifullina Z A 
Published: July 2019

Abstract
The existing methods to study the movement and pattern of flow in wells with electric submersible pump (ESP) within the ‘bottomhole-pump-wellhead’ system are rather experimental and empirical. Hence, the lack of universal techniques considering all possible operating modes of wells does not allow using the existing techniques to elaborate the measures improving the efficiency of well operation with ESP. Besides, these techniques cannot always be applied to define the optimum operating modes and to determine the need for various well intervention jobs as they are not quite perfect. The improvement of profitability of well operation is intimately connected with deliberate change of flow properties and structure considering various physical properties of fluids and ESP-based operating modes with further formation of fine emulsions. In this regard, the modern petroleum industry is facing an urgent task to study the processes in a bottomhole and a wellbore zones using a generalized mathematical model with further analysis of various perturbing actions on emulsion stability, assessment of its decrease and separation of the water phase within subsurface equipment.
Improvement of rock crushing quality based on load specifications set for electrically-driven hydraulic drilling rigs
Authors: Antonenkov D V , Manusov V Z , Tsarev R Yu 
Published: July 2019

Abstract
The analysis was completed on the main production factors which determine energy characteristics of an electrically-driven hydraulic roller-bit drilling rig during drilling operations under the condition of the Far North deposit. In addition, the correlation ratio between the parameters and electric energy consumption was analyzed for the DM-H drilling rig. The equations expressing the relation of the drilling rig load to the drilling speed have been identified. In order to improve the quality of rock crushing, we have modified the method of determining the properties and condition of the rock mass in order to correct the connection layout of the blasting circuit, the activation system, the change in the type of an explosive agent, as well as the composition and weight of the blasthole charge. The proposed approach allows reducing the cost of drilling and blasting operations by 6 % through the improvement in the accuracy of the designed physical and mechanical properties in terms of both the stratum depth and the strike of the mining block.
Hypergraph model for assembly sequence problem
Authors: Bozhko A N 
Published: July 2019

Abstract
The article deals with the assembly sequence problem of complex technical products. It is shown that geometric coordination of parts in a product is a variable arity relation. In general, this relation cannot be described by graph means. The hypernetwork and hypergraph models are proposed. It is shown that the mathematical description of coherent and sequential assembly operations is a normal contraction of edges of the hypergraph. The notion of an s-hypergraphs is introduced. It is shown that s-hypergraphs correctly describe structures of technical systems. A theorem on necessary conditions for contractibility of s-hypergraphs is proved.