bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vector Proportional Integral Control with Delay Compensation for Stator Excited Doubly Salient Synchronous Motors
Authors: Wu Yihong , Bai Fengxian , Sun Jianzhong 
Published: December 2022

Abstract
This paper proposes a novel current control technique to solve the problem that the special doubly salient structure of the studied stator excitation doubly salient synchronous motor (SEDSSM) causes the motor back EMF to cause large harmonic current and torque ripple. Based on the space vector pulse width modulation sinusoidal drive method, a vector proportional-integral controller with delay compensation (VPIC) is introduced into the current loop to replace the traditional PI controller to control the motor. The SEDSSM stator current under the current loop control mode of conventional PI controller is analyzed, and it is found that its waveform is obviously affected and disturbed by the third harmonic current, which will cause torque pulsation. Therefore, additional resonance items are considered to be introduced into the controller to suppress its harmonic. At the same time, considering that the digital delay in the application of the digital system will lead to an unstable state of the control system under the vector proportional-integral controller, the vector proportional-integral controller with delay compensation is introduced for this purpose. Experimental data tested on a 12/8 SEDSSM prototype show that the VPIC controller can significantly reduce stator current ripple and motor torque ripple compared to the existing PI controller.
Application research on optimal layout of HGIS power distribution devices based on 3D design
Authors: Li Kai , Niu Kai , Zhang Jinfeng , Zhou Zheng , Zhao Chong , Xue Wenjie 
Published: December 2022

Abstract
Taking Shangqiu Yide 220kV outdoor HGIS substation as an example, this paper proposes a optimization design layout set of 220kV HGIS and 110kV HGIS power distribution devices through the application of three-dimensional safety clearance verification, HGIS equipment transportation, installation and hoisting, maintenance, inspection simulation and other three-dimensional technologies.
User-side energy-saving potential assessment method based on non-intrusive load identification technology
Authors: Yao Li , Liu Wei , Lu Chunguang , Xiao Tao , Li Yilong 
Published: December 2022

Abstract
With the development of smart grid, smart meters have been widely used, and the Non-Intrusive Load Monitoring (NILM) technology for sensing and identifying electricity load has gradually matured. Aiming at the problem that the characteristics of industrial users’ load status are few and the gap between different industries is large, this paper uses the random forest algorithm to build a load identification model, and at the same time builds an energy-saving potential evaluation index system including three dimensions of economy, technology and management. Based on the load identification results, users can evaluate the energy-saving potential, and output the use strategies and power consumption suggestions of electric equipment.
Implementation of an Isolated I2C Interface Device Based on OOK Codec
Authors: Feng Jianyu , Yuan Yidong , Zhao Tianting , Yang Xin , Liu Fang , Zhuo Yue 
Published: December 2022

Abstract
As a wide used protocol in industry, BMS and T&D system, I2C bus with isolation features stands out to provide additional safety protection and noise immunity. This paper introduces an implementation method of the isolated I2C interface device with high reliability and low delay. This device can meet the I2C ultra-high speed working mode with communication frequency of 1.7MHz as well as prevent the occurrence of interlock in bi-directional communication. The device is fabricated in 0.18um CMOS process.
Reliable design of communication link for power emergency vehicle mobile station based on Beidou satellite
Authors: Ren Weihe , Yang Yu , Li Zhenqing 
Published: December 2022

Abstract
In order to establish a reliable power emergency communication network and speed up the efficiency of power rescue, a vehicle-mounted reliable communication link based on Beidou short message protocol is designed. Aiming at the unreliability of Beidou short message communication and the limitation of communication capacity, the enhanced data handshake mechanism is adopted to enhance the reliability of data transmission, and the multi-card cooperative transmission mechanism is adopted to improve the efficiency of data transmission. The example results show that the transmission success rate of the proposed reliable communication link is significantly higher than that of the traditional method, which can improve the reliability of mobile station data transmission and provide communication guarantee for power recovery.
Research on Plug-and-Play Technology of Distributed Renewable Energy
Authors: Li Bo , Xu Quan , Lin Guanqiang , Lin Xinhao , Zhao Ruifeng , Yu Lei , Pan Songlin 
Published: December 2022

Abstract
With the application of distributed renewable energy access in the power distribution system, the automation and digitalization of the power grid is effectively promoted. This greatly improves the level of energy utilization and promotes green and sustainable grid development. However, there are problems of edge-to-end authentication and information interaction in the process of accessing massive and various types of renewable energy sources. Therefore, we propose a distributed renewable energy plug-and-play approach for distribution local area networks and study a topology identification-based plug-and-play technology. We establish a distributed renewable energy access architecture with reference to the “cloud-side-end” hierarchy of the distribution IoT. Based on this, we propose a topology-based renewable energy plug-and-play mechanism to verify the energy access and realize the plug-and-play and interoperability functions. The experimental results show that the method has an accuracy rate of 90% in the verification of renewable energy access, and has a significant improvement in the efficiency of plug-and-play access for various types of renewable energy, fully realizing the automatic operation and maintenance of plug-and-play and topological correlation for massive renewable energy.
Sensorless Brushless Motor Phase Compensation Speed Control
Authors: Bu Wenping , Ding Zhilin , Cai Xing , Huang Liang , Chen Chen 
Published: December 2022

Abstract
This paper proposes angular velocity vector feedback speed control system, the amplitude and phase signals of diagonal velocity are extracted, and signals are converted into current and voltage vector signals to achieve high efficiency and speed precision. Brushless motor rotational stability on speed and torque are classified, comparative characteristics analysis of dynamic speed and torque between conventional method and proposed method are simulated, results consisting of speed accuracy, the waveform of stator current and back electromotive force of each phase are all compared and analyzed, verifying fitness and validation of the proposed method.
Development and Design of ADPSS Co-simulation Technology for Large-Scale New Energy Electromagnetic Transient Simulation in High Performance Calculation
Authors: Zheng Weijie , Mu Qing , Wang Feng , Chen Xujiang 
Published: December 2022

Abstract
As large-scale wind and photovoltaic power generation incorporating into the AC power grid, the impact of new energy fluctuation and uncertainty on the transient stability of power grid have attracted widespread attention among researchers and engineers in the power industry. It is necessary to improve the transient simulation and modelling ability of new energy to provide a more efficient simulation platform for the stability research of new energy generation connecting to large power grid. In this paper, the ADPSS technology of large-scale new energy electromagnetic transient simulation is mainly studied in depth, including the following contents: the design and development of the interface and program of ADPSS-Matlab co-simulation, the improvement and optimization of the parallel high performance computing, and the verification of the accuracy of co-simulation for the modelling and experimental research with large-scale new energy simulation.
The Risk Analysis of Electric Shock in Different Grounding Systems
Authors: Li Zhe , Ding Yuxuan , Cao Jinxin , Du Yaping 
Published: December 2022

Abstract
The risk of human body electric shock has always been an important issue to be considered in the design of grounding systems. To protect the human body from the risk of electric shock and to facilitate the design of the grounding system. In this paper, we use the Partial-Element-Equivalent-Circuit (PEEC) method to give numerical simulations for a typical grounding system and electric power distribution system under fault conditions. The electric shock for a typical grounding system, i.g. TN system or TT system, under phase-to-earth or phase-to-neutral short-circuit faults is studied. It is found that the complicated grounding grid may have a low step voltage than a single electrode. The touch voltage under phase-to-earth or phase-to-neutral fault conditions is analyzed. The TT system generally has a higher touch voltage magnitude than the TN-C system.
A novel discrete modeling technique and Stabilization Analysis of the two-order Inverter System
Authors: Dai Yunzhong , Li Meirong , Yang Wei , Jiang Tianchen , Li Xiaohong 
Published: December 2022

Abstract

LC-filter-based H6-bridge inverter (LC-H6) is a two-order inverter system, which is an appropriate circuit for the medium or high power inverter field. A novel discrete modeling technique with coefficient linearization based on stroboscopic map method is presented to reduce iterative computation and memory expense of the LC-filter-based H6-bridge inverter with PI controller (LCH6-PI) system. Meanwhile, the collision border lines of i are deduced. Then, based on the coefficient linear discrete model, stability regions of control parameter k
p, DC voltage E and load inductance L are analyzed. Finally, the simplified discrete model is verified by circuit simulation and experimental results. Stabilization analysis indicates that the stability boundary and chaos boundary can be obtained by period-doubling bifurcation and border collision, respectively.
Numerical Simulation of Transmission LineIcing Based on Computational Fluid Dynamics
Authors: Liu Junxiang , Xu Zhong , Fan Weinan , Wang Yong , Mo Wenxiong 
Published: December 2022

Abstract
In recent years, transmission line icing disasters occur frequently, which poses a great threat to the operation of power grid. Most of the existing studies do not consider the impact of time-varying meteorological conditions on conductor icing. In order to effectively predict the growth of line icing, it provides an important reference for transmission line deicing and galloping early warning. The wind tunnel model of the transmission line is established by using the computational fluid dynamics simulation software, and the air flow field distribution around the transmission line is calculated by using the hybrid grid division. By establishing the motion equation of cooling water droplets in the air and analyzing the motion trajectory of water droplets, the local collision coefficient between water droplets and the transmission line is obtained, and the icing surface of the transmission line is discretized into a control body, Through the establishment of thermodynamic model, the mass balance and energy balance equations are established to calculate the icing quality of transmission line. According to the environmental temperature, wind speed, transmission line diameter and other factors, the quantitative influence degree of different factors on the icing form of transmission line is output, so as to provide technical support for the safe and stable operation of important transmission channels.
Time constant analysis of micromotors for virtual reality helmets
Authors: Xin Yuanxu , Wang Xudong 
Published: December 2022

Abstract
This paper focuses on the study of an ultra-micro permanent magnet stepper motor with automatic adjustment of interpupillary distance for VR helmets. To precisely adjust the rotation of the motor, the control requirements for the motor are very important, which also makes the time constant of the micro permanent magnet stepper motor of great significance. Starting from the voltage, torque balance equations and thermal balance equations, the paper analyzes and compares the electrical time constant, mechanical time constant, electromechanical time constant and thermal time constant of the micro permanent magnet claw-pole stepper motor in basic theory. Different specifications of micro permanent magnet claw-pole stepper motors were used to obtain some relationships between time constant and motor performance, which provided reference for the design and control research of micro permanent-magnet claw-pole stepper motors.
Insulator self-shattering detection based on YOLOv5 under small sample conditions
Authors: Yang Yanli , Wang Xinlin 
Published: December 2022

Abstract
Insulators are indispensable devices on power transmission lines. The self-shattering of insulators pose a threat to the operation of transmission lines. Insulators where self-shattering occurs are usually small objects in an image, and samples of insulator self-shattering are scarce. This brings challenges to the intelligent detection of insulator self-shattering. The insulator self-shattering is detected by a YOLOv5 under small sample conditions. Considering the scarcity of insulator self-shattering images, normal samples are used to assist in training a YOLOv5 model. Tests on a few public datasets and some simulated self-shattering images show that the recognition rate can reach 97.43% when the ratio of training to test samples is 1:10.4. The results show that our method provides a way to identify self-shattering insulator under small sample conditions.
Research on real-time power flow calculation method in closed-loop distribution networks
Authors: Wang Xiao , Yu Yinshu , Wang Rongting , Zhu Xiaojie , Xie Yong 
Published: December 2022

Abstract
It is less intelligent to calculate the closed-loop power flow of the distribution network by manually inputting the closed-loop power flow parameters. Therefore, it is necessary to study the real-time calculation method of the loop power flow in the distribution network. In this paper, a real-time calculation method is put forward based on the Thévenin’s Theorem. Forward/backward sweep algorithm is used to calculate the power flow of the closed-loop distribution network with the aid of the equivalent impedance and the maximum inrush current. A real-time automatic analysis tool for the closed-loop power flow is developed as well, based on the autonomous decentralized concept. The closed-loop power flow calculation is embedded in the DSCADA system to evaluate the feasibility of the loop-closing operation. Test results show that the proposed method can effectively identify the limit violation conditions within the distribution network, and that the calculation error in closed-loop power flow is small.
Electromechanical transient simulation model of low frequency flexible transmission system based on modular multilevel matrix converter
Authors: Yang Zedong , Hua Wen , Lin Jintian , Su Zhida , Wang Xueqiong , Tang Yong 
Published: December 2022

Abstract
Low frequency AC transmission has broad prospects in the future power system. How to establish its electromechanical transient simulation model and provide basic research means for its adaptability analysis after connecting to the large power grid is an urgent problem to be solved. Based on the existing electromechanical transient simulation methods, the mathematical model of modular multilevel matrix converter (M3C) is simplified, and an electromechanical transient simulation model composed of virtual DC circuit and equivalent AC circuit is proposed. On this basis, the power and voltage controller is designed according to the power decoupling characteristics of M3C. Further considering the operation requirements of the offshore wind power transmission system through low frequency AC transmission, an island control is designed to make M3C have the ability of passive control. Numerical examples verify the effectiveness of the proposed simulation model, which can effectively respond to short-circuit faults and power loss. This model can better meet the calculation requirements of large power grid simulation.
Condition assessment of transformers in wind farm based on modified one-dim residual neural network
Authors: Xu Honghua , Li Yong , Zhu Lei , Xu Ziqiang 
Published: December 2022

Abstract
The working environment of transformers in the wind farm is more complex than others, which brings the difference in condition assessment. Moreover, many condition assessment methods based on characteristics or machine learning have difficulty in recognition in cases of multiple transformers, conditions and measuring points. To assess conditions, this paper establishes a condition classification model of the transformer with a modified one-dim residual neural network and uses vibration signal, current and voltage as inputs. The built network mode has faster convergence speed and classification accuracy in transformer condition assessment and is more suitable for transformer condition assessment than the original one.
Automatic Test System of Power Software Equipment Based on Test Case Optimization Strategy
Authors: Luo Ling , Zhang Ji , Guo Xun , Zhu Jie , Liu Jing 
Published: December 2022

Abstract
In order to improve the test efficiency of power software equipment, the automatic test system based on test case optimization is designed and implemented. The architecture of our automatic test system includes hardware structure and software structure. The optimization strategy which designed by two methods according to classification by different modules or different types of equipment is proposed. Based on the two methods, the automatic test system takes significantly less time, and has higher processing efficiency of power software equipment. Finally, the effectiveness of the strategy is verified.
Ultra short term load forecasting for different types of industrial parks with intelligent buildings
Authors: Tang Junci , Wang Guanfu , Cai Zhiyuan , Zhao Xiaodong , Li Haoyu , Cui Jia , Li Zihan 
Published: December 2022

Abstract
For industrial parks with intelligent buildings, accurate forecasting of various load sizes may reduce the power supply pressure of the power grid. For industrial parks with intelligent buildings, considering the influence of weather factors and the dynamic electricity price game mechanism, the load forecasting of industrial parks often ignores the load of intelligent buildings and electric vehicles, resulting in insufficient satisfaction of residents in the buildings. The improved Attention-LSTM algorithm based on DBN structure is proposed. It takes into account the correlation between loads and the correlation between loads and energy sources. When forecasting high energy consumption industrial loads, the forecasting accuracy of intelligent building loads and electric vehicle loads is improved compared with the original algorithm, which ensures the satisfaction of residents in the building. Finally, an example is given to verify the advantages of the algorithm.
Research on Transformer Oil Level Monitoring System Based on Inspection Robot
Authors: Zhang Hongcui , Yang Junjie , Sui Zhicheng 
Published: December 2022

Abstract
Because the traditional oil level gauge transformer relies on manual regular patrol detection, it is not easy to know the state change of the oil level in real time. In recent years, the rapid development of AR/VR technology, the positioning, and the construction of maps of robots have also received widespread attention, and the oil level inspection task has gradually evolved in the direction of intelligent machine inspection. Based on this background, this paper studies the Cartographer algorithm, according to the mapping results for path planning, to achieve robot autonomous navigation of the designated location. After arriving at the destination, the user obtains the oil level by the depth camera, and uses the YOLOv4 to design an intelligent detection algorithm for oil level detection, using neural networks to learn the oil level state in various weather, and train a dedicated model. Through experimental verification, the inspection robot can complete the construction of the map and realize autonomous path navigation according to the target point, and the oil level detection system based on the YOLOv4 algorithm can achieve an accuracy of more than 90% for the recognition of oil level information, which has good applicability.
Influence of plasma activation nanostructure collagen on process structurization without chrome a fur sheepskin
Authors: Garifullina A R , Sysoev V A , Nasirova R A , Gieskhonov A A 
Published: December 2022

Abstract
The influence of water-soluble non-isocyanate urethanglicol and plasma treatment on changes in the nanostructure of collagen in the process of organic tanning is investigated. Plasma modification leads to conformational changes in collagen fibers which contributes to increase in the diffusion of structuring agents into the sense of capillary-porous material. Input parameters of plasma processing determined. Pilot tests of the proposed technology led to the production of a semi-finished product of fur sheepskin with increased values of physical, mechanical and operational indicators in comparison with the control.
The effect of plasma flow on the properties of low-current arc in an open atmosphere
Authors: Tazmeev G K , Tazmeev A K , Tazmeev B K 
Published: December 2022

Abstract
The electrical and optical properties of a low-current arc, which was blown by a plasma flow from a gas discharge with a liquid electrolyte cathode, were experimentally studied. The arc current varied in the range of 1-10 A. As a liquid electrolyte, aqueous solutions of sodium chloride with a specific electrical conductivity of 10-15 mS/cm were used. The arc and gas discharge with an electrolyte cathode were tied to a single-metal anode.
Analysis of the characteristics of the direct current discharge in the electrolyte medium at low pressure
Authors: Valiev R I , Khafizov A A , Bagautdinova L N , Gaysin F M , Gaisin Az F , Belgibaev E R , Shakirov Yu I 
Published: December 2022

Abstract
The results of experimental studies of direct current electric discharge in the gas-liquid medium of an electrolyte with bubbles for various interelectrode distances (l=50-150 mm) inside a dielectric tube are presented. The presence of a bubble structure with microdischarges affects the nature of the discharge current and voltage ripples. The frequency spectrum of voltage and current oscillations of the discharge was established using the fast Fourier transform. Based on the analysis of experimental data, a mechanism for the development of a direct current electric discharge with a gas-liquid medium with air bubbles and microdischarges has been established.