bluuebunny/crossref_metadata_2025_split huggingface dataset:
Features of Glow Discharge burning between a hollow cathode and a mesh anode
Authors: Yunusov R F , Garipov M M 
Published: August 2020

Abstract
The article is devoted to an experimental study of the features of the combustion of a glow discharge between a hollow copper cathode and a mesh anode in a longitudinal air flow. The cylindrical channel of the discharge chamber was formed by five glass sections separated by copper plates, which served as probes for measuring the plasma potential. Air flowed through the hollow cathode into a cylindrical channel. The anode was a metal grid of a copper plate 1.5 mm thick with holes uniformly located on it with a diameter of 1 mm. The distance between the hollow cathode and the mesh anode was 6.5 cm. Air pressure P, its velocity V, discharge current I and its voltage U varied respectively in the ranges: P = (6. 4 - 19) kPa, V = (0 - 10) m / s, I = (5-100) mA, U = (1. 0 – 2. 0) kV. The current-voltage characteristic had a negative differential resistance. By changing the ballast resistance, the forward and reverse branches of the current-voltage characteristic were removed. It was found that in the range of discharge currents I = (40-80) mA, these branches do not coincide, that is, hysteresis phenomena were observed. In the ascending branch of the current-voltage characteristic in the region of the current strength I = 80 mA, the discharge voltage increases sharply from U = 1. 2 kV to U = 1.6 kV. In this case, the discharge glow becomes more intense, wider and brighter, and the structure of light and dark zones along the discharge chamber also changes. Characteristic photos of the discharge are given. The formation of luminous and dark gaps inside the positive column of the discharge and their movement towards the anode was detected.
Calculation of portable properties of some real gas mixtures at high temperatures
Authors: Takseitov R R , Galimova R K , Yakupov Z Ya 
Published: August 2020

Abstract
A method for calculating the power parameters of a potential of the Lennard-Jones type for a number of individual gases, which can be products released during the ignition and combustion of a gas-vapor discharge with a liquid electrode, is presented. The information obtained makes it possible to calculate the viscosity and diffusion coefficients of individual gases and gas mixtures, which will make it possible to solve a range of problems when modeling processes in the processing technology of various materials (substances) by vapor-gas discharge plasma with a liquid electrode.
Reduction of Torque Ripple for Interior Permanent Magnet Motor with Fractional-Slot Concentrated-Windings
Authors: Le Wang , Dejun Yin 
Published: August 2020

Abstract
Fractional slot concentrated winding motors have advantages of compact structure, high efficiency and high power density, and are widely used in various fields. Due to the large torque fluctuation caused by improper design, it is necessary to pay attention to the torque ripple of the motor. This paper analyses the torque ripple of an 18-slot 12-pole motor, and provides a new method to reduce cogging torque and torque ripple torque through optimizing the harmonic magnetic field generated by permanent magnets. Finally, the validity of the method is verified by the FEM method.
A new short-circuit calculation method of power system with photovoltaic power sources
Authors: Chen Gang , Wu Jiafang , Xiao Yanhui , Hu Jiajia , Chen Yunchao , Zhou Niancheng 
Published: August 2020

Abstract
A large number of photovoltaic power sources connected to the grid will increase short-circuit current level of power system, and its fault transient process will change the fault characteristics of power grid. In this paper, the equivalent models of transient and steady state faults are obtained, by analysing the full current expression of photovoltaic power sources and its current characteristics in different fault stages. Based on the superposition theorem, the short-circuit current calculation method of power system with photovoltaic power sources is proposed. Finally, the effectiveness of the proposed method is verified by the analysis of actual power grid calculation examples, and the results can be used for power grid planning and relay protection setting.
An IGBT short-circuit protection method using variable VCE detection threshold
Authors: Li Yi-Wen 
Published: August 2020

Abstract
When mine fan is driven by power inverter, the high-power inverter maybe used to drive low-power motors, so the short-circuit protection threshold of the IGBT needs to be adjusted online. Firstly, the principle of DESAT function of IGBT driver chip is analyzed, then the detection threshold adjustment circuit is designed by using precision voltage reference and voltage comparator, and the method of real-time threshold adjustment by PWM wave with different duty ratio is designed. Experiments show that the IGBT overcurrent detection circuit can respond and act quickly and accurately, so that the IGBT can be protected in time and effectively under different overcurrent conditions.
Research on the Power Batteries for the Sutong GIL Special Transportation Vehicle
Authors: Yan Yao , Sun Lei , Xia Shunjun , Dai Dahai , Chen Jianghua 
Published: August 2020

Abstract
The GIL Special Transportation vehicle (GIL) is a special device to transport the GIL unit equipments for the GIL project. Due to the complicated environment and massiveness of Sutong tunnel, combined with the large weight of the GIL unit, the power system for the GIL transportation vehicle is crucial for the completing of GIL project. In this paper, we discuss the generally used power systems for the transpostation vehicles in terms of safty, reliability, capacity, and effectiveness, etc. By analyzing the power requirement of Sutong GIL special transportation vehicle according to the environment of the Sutong tunnel and the weight of GIL unit equipment, we choose the lithium iron phosphate power batteries for the Sutong GIL special Transportation Vehicle combining with the features of these power batteries, which helps the Sutong GIL project to finish within the schedule.
Research on Real-time Reliability of Relay Protection System in Intelligent Substation
Authors: Lu Xi-Ning , Wang Hong , Liu Hai-Tao , Xu Chen , Zhang Li-Wu , Jin Zhi-Song 
Published: August 2020

Abstract
Because the intelligent substation is composed of a variety of intelligent electronic components, various types of information data will be generated during its operation. With the continuous implementation and rapid development of smart grid construction, the application of smart substations in power systems is becoming more and more extensive, and the number and scope of use are gradually expanding. In the face of the substantial increase in the commissioning of smart substations, people are paying more attention to the reliability of relay protection devices in smart substations during use. Strengthening research on the relay protection system of intelligent substations and improving the reliability of the system are urgent problems that need to be solved. The digitization of data information of the whole station is a typical feature of intelligent substations, on this basis, distributed relay protection can be realized; At the same time, the system-level status information can be identified and evaluated. Because there are too many spatial states, the calculation is very complicated. To solve this problem, this paper proposes to calculate the reliability of the relay protection device by Markov method, and then calculate in system level by GO method. Combining the Markov algorithm model with the GO method, the reliability of the relay protection system is calculated and analyzed, enabling the on-site operation and maintenance personnel to grasp the basic status of the relay protection device and the system operation in real time, obtain real-time feedback information, and better relay protection work of smart substations.
The Influence of Natural Light on the Design of Electrical Lighting -Taking Liaohe Art Museum as an Example
Authors: Zhao Guohua 
Published: August 2020

Abstract
In the museum, electrical lighting is a very important part, which will affect the visitors’ feelings. This paper mainly studies the impact of natural light on the design of electrical lighting engineering. This experiment was conducted in Liaohe Art Museum. First of all, the lighting situation of each area of the museum was investigated to obtain objective data. Then 30 visitors were invited to conduct subjective survey experiments. The experiment selected two exhibition halls with different lighting methods, one of which only uses artificial lighting (Exhibition Hall 1), and the other uses a combination of natural light and artificial light (Exhibition Hall 3). It was found that people gave a better evaluation score to the exhibition hall combining natural light and artificial light. Therefore, in the museum, the rational use of natural light will bring better psychological feelings to visitors.
Research on the Size of Non-contact High-voltage Electroscope Based on Ansoft Simulation
Authors: Wang Wenlin , Zhang Peng , Shi Yingchun , He Peng , Yang Hongwei 
Published: August 2020

Abstract
Aiming at the time-consuming and labor-intensive problems of traditional electroscopes, a non-contact high-voltage electroscope was developed. This article uses the contact network as an example. First, the electric field simulation of the transmission line under Ansoft is performed. At the same time, the voltage and electric field strength changes under different conditions at 1m under the transmission line are analyzed to determine the test height of the high-voltage electroscope. A human substitution model is proposed, and the effect of humans on electric field distortion is analyzed. Secondly, the relationship between the induced voltage on the parallel plates and the distance test circuit of the parallel plates was deduced according to the principle of space capacitor voltage division, and the dimensions of each part of the high-voltage electroscope were initially determined to provide data references for subsequent electroscope designs.
Household Electricity Load Forecasting Based on Pearson Correlation Coefficient Clustering and Convolutional Neural Network
Authors: Xie Minghao , Chai Chengwei , Guo Heng , Wang Minghao 
Published: August 2020

Abstract
With the development and construction of country, the rapid growth of electricity consumption has caused the problem of undersupply of electricity. It has become a necessarily daily work to forecast the load of the electricity precisely. A new method, new clustering load forecasting method, is used to forecast residential electricity consumption. Distinguished from other methods with Euclidean distance as their evaluation index, however, the method in this paper is defined with the Pearson correlation coefficient. Furthermore, CNN is used in the experiment about residential load forecast. The result indicates that the new method offers more accurate forecasting data than the traditional methods.
Simulation of electric field on a polypropylene slice between high voltage electrodes
Authors: Liu Jieyu , Cheng Wenyu , He Jianning , Zhuang Qiming , Zhao Yan , Wang Donglai 
Published: August 2020

Abstract
The dielectric strength of insulating slice in the high voltage apparatus can be changed by doping the nano clay. In order to test the breakdown time of nano clay-doped polypropylene slices in different temperatures, an experiment has been carried out. In this article, the model of electric field simulation for the experiment is studied. Influences of the thickness and relative permittivity of polypropylene slice on electric field strength are considered. The simulated results can be used as reference for analysing the experimental phenomena of the breakdown of polypropylene slices.
Influence of Active/Reactive Power Control on Harmonics of Wind Unit Converters and Photovoltaic Inverters
Authors: Wang Shibo , Wang Nan , Cheng Yan , Wang Yanzhuo , Wang Shangbin , Yu Peng , Wang Yuejiao , Teng Wei , Sun Shumin 
Published: August 2020

Abstract
Wind units and photovoltaic inverters are the central generation devices of new energy power generation. Hence, the research on harmonic mechanisms and feature influencing factors of new energy power generation units is essential for its safe and stabile operation. This paper analyzes harmonic and inter-harmonic mechanisms of wind units/photovoltaic inverters and studies the influence of active and reactive power output of wind farms and photovoltaic plants on harmonic features of wind units/photovoltaic inverters. Simulation results and harmonic test data verify the theoretical analysis of harmonic mechanisms and influencing factors of photovoltaic inverters and directly-driven wind unit converters.
Analysis and Research on the fault disposal process of the electric energy metering devices
Authors: Wang Pingxin , Li Lin , Dai Yanjie , Zhang Zhi , Li Congcong , Du Yan , Dong Xianguang , Chen Zhiru , Zhu Hongxia , Yang Jie , Yu Chao , Xu Ziqian 
Published: August 2020

Abstract
With the wide application of electronic equipment, the electric energy metering device of site operation is often subject to various types of interference. Due to the complex operation environment, various kinds of fault problems often occur in the electric energy metering devices. However, the actual failure disposal methods were not unified and standardized, which often results in the waste of electric energy metering device assets. In view of the above problems, the faults disposal methods of the electric energy metering devices were studied, the work flow of standardized fault disposal of electric energy metering devices was sorted out and the disposal requirements of each link were identified, which provides a good foundation for standardizing the unified and efficient disposal of the failed electric energy metering devices, deepening the quality management of the whole life cycle of the electric energy metering devices, and realizing the effective reuse of the electric energy metering devices.
A Novel Variable Flux Reluctance Generator for Vehicles
Authors: Yang Tianyu , Zhang Guangming 
Published: August 2020

Abstract
The general vehicle generators are claw-pole synchronous generators, which have the problems such as complicated processing technology of claw poles, low reliability of brushes and low operating efficiency. In this paper, a novel variable flux reluctance generator (VFRG) for vehicles is introduced and it is different from common reluctance machines. It has field coils on each stator pole and forms sinusoidal flux-linkage at each phase’s winding. Compared with general vehicle generators, it has the advantages of simple structure, strong robustness and high efficiency. The structure and operating principle are illustrated at first. Then a VFRG vehicle generator of 28V output voltage for 24V power systems is designed and optimized, which has low cogging torque as well as sinusoidal back-EMF waveforms. In addition, the characteristics and voltage ripple are obtained by simulation. And the technical specifications meet the requirements for a vehicle generator to work in a wide speed range. The results validate the applicability and superiority of VFRG to be a novel generator for vehicles.
Summary of a Numeric Method for Calculating Heat Transfer in the Rotary Air Preheater
Authors: Chen Kai , Qin Yao , Liu Xinfei 
Published: August 2020

Abstract
Due to the introduction and implementation of new standards and new specifications, the structure of the heat transfer elements inside the air preheater has undergone relatively large changes. The thermal calculation method of the rotary air preheater is based on the Soviet 1973“Standard Method for Thermal Calculation of Boiler Units” It has been impossible to directly establish the heat transfer formula. According to the actual operating conditions of the rotary air preheater, the boundary conditions of the calculated heat transfer model can be obtained, including: the inlet temperature and inlet flow rate of the flue gas and air of the preheater; the heat transfer element of the regenerator is repeated Rotation, there are continuous conditions of the temperature of the heat storage element heat transfer element between the different air flow sub-bins. And a method for solving discrete equations is proposed.
Study on test and assessment of low voltage ride through characteristics of electrochemical energy storage system
Authors: Si Xuezhen , Rao Yufei , Xu Ben , Shi Tao 
Published: August 2020

Abstract
In this paper, it is focused on test and assessment of low voltage ride through characteristics of electrochemical energy storage system. Based on the national standard GB/T 36547-2018: technical rule for electrochemical energy storage system connected to power grid, this paper proposes a test and evaluation method for the low voltage ride through characteristics of EESS, and carries out a case analysis based on test data of experimental system to verify the feasibility and effectiveness of the method.
Implementation of Intelligent Distributed Feeder Automation for Distribution Network
Authors: Wu Linwei , Huang Yibiao , Li Rong , Xie Xicheng , Wang Yifan 
Published: August 2020

Abstract
With the increasing demand for power supply reliability in the society, the demand for the degree of feeder automation in the distribution network is also increasing, and the feeder automation function for the purpose of improving power supply reliability is gradually improving. The research and judgment strategy of fault section location, isolation and non-fault section power supply recovery based on the feeder automation function has become a research hotspot. This paper introduces the research and judgment strategy of fault information interaction based on communication network for fast location and isolation of fault section, and expounds the research and judgment strategy of intelligent distributed feeder automation of boundary switch and contact switch in main line and branch line of distribution network in detail.
Summary of Chinese Patents Regarding to Heat Pump
Authors: Chen Kai , Liu Xinfei , Qin Yao 
Published: August 2020

Abstract
The heat pump is an efficient energy-saving device that makes full use of low-grade heat energy. Heat can be transferred spontaneously from a high-temperature object to a low-temperature object, but it cannot spontaneously proceed in the opposite direction. The working principle of the heat pump is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse cycle. It consumes only a small amount of reverse cycle energy and can obtain a large amount of heat supply, which can effectively use low-grade products that are difficult to apply. Finally, the purposes of saving energy are achieved. This article mainly relates to the patents of high-power heat pumps, compact heat pumps, and split heat pumps, this article discusses from three aspects: high power, split and compact heat pumps. In the hope that reflect the novelty, it mainly discusses the relevant patent documents in the past five years.
Study on the Electric Field Distribution Characteristics of the DC Arrester in the Case of Pollution
Authors: Wang Hui , Li Ze , Yao Weijia , Zang Yiming , Qian Yong , Sheng Gehao 
Published: August 2020

Abstract
The DC electric field has a strong adsorption effect on the polluted particles of the substation, so the surface of the DC surge arrester is more prone to fouling. The DC pole bus arrester of the UHV converter station will change the electric field on the external insulation surface and the electric field between the resistance valve and the insulation jacket due to its internal resistance sheet structure characteristics, so it will have a certain impact on the operation status of the arrester. In this paper, by constructing a simulation model of the pollution electric field on the surface of the UHV DC pole bus arrester, the distribution characteristics of the surface pollution in the DC field are studied, and the radial electric field characteristics of the umbrella skirt surface when the surge arrester is wetted and the local drying zone occurs are calculated. It will enhance the surface field strength and the internal radial field strength of the insulating jacket, but the value is small, and it will not cause surface corona and flashover and other discharge phenomena; but when the local dry zone appears on the surface, it will be on the outer insulating surface and the resistance valve A penetrating discharge with the insulating jacket will have a serious impact on the safe and stable operation of the arrester.
Modeling and Analysis of Industrial Power Load Based on Measured Data
Authors: Yan Zhang , Huajia Wang , Danwen Yu , Gaofeng Zhang , Weichao Li 
Published: August 2020

Abstract
With the rapid development of electronic technology, the construction of smart grids has been accelerated. Establishing an accurate load model is of great significance to the stability of distribution network system. Some large-capacity installations with more harmonics and impact, such as electric arc furnaces and wind farm are connected to the grid, which has a serious impact on the power quality of the distribution network. This paper adopts a method of industrial load modeling based on the fitting of measured data, selects electric arc furnace and aluminum rolling mill as typical industrial loads, establishes its model through fitting the measured data, which proves the reliability and accuracy of the load model.
Research on Single Tower Cost Prediction Technology of Transmission Line Engineering Based on 3D Design
Authors: Chen Wenhan , Qi Xuecheng , Fang Jingyu , Shao Jian , Chen Chao 
Published: August 2020

Abstract
Overhead transmission line project investment and construction is an important part of the daily investment activities of power grid companies. With the continuous advancement and implementation of my country’s power system reform, improving the efficiency and efficiency of investment in power grid projects has become the main way for grid companies to invest. The construction and development of overhead line projects is an important support for power grid companies to ensure the safe and stable supply of electricity. The construction cost control of large-scale overhead line projects faces many influencing factors. Factors such as terrain, geology, meteorology, and transportation conditions will cause large differences in cost and other realities. Therefore, strengthen the lean management of the construction cost determination of overhead line projects, rely on the development and application of three-dimensional design, strengthen the construction of a “tower-oriented” construction cost determination system, reasonably control project investment, and increase the level of power grid construction investment efficiency.
DSP Implementation of Neutron Radiation Detection Based on Kalman Filter
Authors: Teng Yuchao , Zheng Xiaohai , Wang Qi Long 
Published: August 2020

Abstract
Aiming at the situation of nuclear neutron pulse count distortion and low measurement accuracy, a digital processing chip and Kalman filter are designed to replace the traditional hardware filtering method. The system uses TMS320F28335 as the main control chip, and takes advantage of the DSP-specific digital signal processing chip. After using the extended Kalman filter to reduce the noise and filter the pulse neutron count, the experiment proves that the nuclear pulse neutron count measurement after the extended Kalman filter process is stable, and the measurement accuracy has been significantly improved. The overall structure and working principle of the system are introduced, and specific hardware and software design schemes are given.