bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multi-energy coordination control method of power system connected to microgrid of combined cooling, heating and power
Authors: Qi Han , Chen Kai , Liu Yanmin , He Xinan 
Published: December 2022

Abstract
The problems of energy shortage and ecological destruction are becoming increasingly serious. As a comprehensive energy utilization system, cogeneration system has gradually become a research hotspot. In order to improve the basic frequency stability and reduce the operation cost, this paper presents a multi-energy coordinated control method for CHP micro-grid. Firstly, the topology of CCHP system is analyzed. On this basis, this paper constructs a CCHP power system including micro turbine (MT) and air conditioning (AC). Secondly, a multi-component composite energy storage method for power system is proposed. Different types of energy storage devices than a single way of energy storage has better performance, to achieve multi-complementary. Finally, in the construction of power system collaborative control model, this paper constructs power system collaborative control model based on load storage optimization idea of source network. Experimental results show that the proposed control method has strong fundamental frequency stability and low operating cost, and has certain application value.
Design of measuring circuit of motor speed based on Proteus
Authors: Yue Chenyang , Zhao Yiquan , Zhang Peng , Yang Chengkai , Li Jianhui , Sun Yanzhe 
Published: December 2022

Abstract
In this paper, 51 single chip microcomputer, photosensitive element and 1602 are used to design the motor speed measurement circuit based on grating method, and Proteus software is used to build the circuit and function verification. Finally the project achieves the motor speed measurement and adaptive content display under different precision, the project simulation verification results are well. At the same time, on this basis the construction of motor speed measurement circuit is discussed and promoted.
A method for estimating line industrial frequency parameters based on wideband information
Authors: Dong Fangfang , Chen Fang , Guo Quan , Lu Wei , Wang Jilei , Sun Qingbin 
Published: December 2022

Abstract
Accurate acquisition of transmission line parameters is the basis for grid condition monitoring and data analysis, which is of great significance for the safe and economic operation of the grid. With the widespread use of phasor measurement unit (PMU) technology, the wideband information in the grid can be exploited, which broadens the new direction for line parameter identification. In this paper, a method is proposed to identify line frequency parameters based on wideband information. A mathematical model for line parameter identification with wideband information is established, and the identification of line frequency parameters is achieved by iterative solution through least squares. The results show that the accuracy of the parameter identification is improved by adding wideband information, and the identification of industrial frequency parameters for lightly loaded lines can be achieved. Finally, the feasibility and correctness of the method is verified by simulation.
Technology of One-phase-to-earth Trouble Section Location Based on Prony Decomposition and Multi-constituents Fusion
Authors: Li Xinming , Chen Yanxia , Wang Zhiyong , Xu Wanyu , Xu Jiyang , Liu Wei , Zhang Jiliang 
Published: December 2022

Abstract
Prony method is used to fit multi-constituent data through a series of linear combinations to obtain the amplitude, phase, damping factor and frequency of each constituent. Prony decomposition is used to decompose the temporary constituents of null sequence current to multi terminal trouble in dispersion network. The DC constituent and high-frequency constituent of trouble null sequence are effectively extracted and fused. The cutting position is obtained with comparing the phase relationship to the orientation information of the fused constituent. Theoretical analysis and results show that the algorithm is applicable to all kinds of ground connection errors, can accurately and reliably determine the one-phase ground connection error pause of dispersion network, and effectively improves the positioning accuracy and efficiency.
One-Phase Ground Fault Line Selection Technology for Distribution Network Based on Comprehensive Analysis of Phase Current
Authors: Zhang Xinyu , Wang Yang , Du Wei , Wang Zhibo , Li Haifeng , Gu Taiyu 
Published: December 2022

Abstract
Due to the various types and different characteristics of one line-to-ground faults occurring in the partial network which is responsible for distribution, the adaptability of location technology applicable to a one fault type is poor. To ensure the operational reliability of the partial network which is responsible for distribution, this thesis shows a one-phase ground fault line selection technology for distribution networks that is applicable to various types of faults. By using this technology, we can comprehensively analyze the characteristics of phase current in transient state and steady state when different types of faults occur, and fault line selection algorithms suitable for intermittent arcing and resistance grounding respectively were proposed according to the steady-state phase and transient mutation characteristics of phase current. In addition, the feasible region of the proposed line selection technology was expanded by using the comprehensive analysis algorithm combined with two-line selection algorithms, which ensures the reliability of selecting fault line after different types of one line-to-ground fault s occur in the system. Finally, the ATP simulation software was used to verify the reliability and engineering applicability of this technology.
A Frequency Measurement Method for Protection of Smart Circuit-breaker
Authors: Ren Zhendong , Zheng Libin , Zhou Ying 
Published: December 2022

Abstract
The application scale of new energy such as wind energy and solar energy in China is increasingly large. One of the characteristics of these energy sources is instability. Circuit-breakers play an important role protection in distributing these energy sources. Aiming at a new type of smart circuit-breaker architecture, this paper proposes a frequency measurement method for protection function, that is, the waveform sample value of high precision and high sample rate output by the DMA of the metering chip. The FIR filter is used to eliminate harmonic interference, impulse interference, etc of sample value. The frequency value is calculated by the interval duration between the two cross-zero points of sample value, and the simulation process, as well as the results, are given.
Parallel Combined Spread Spectrum Error Analysis And Succesive Error Correction Method
Authors: Wang Zhi-qiang , Ding Dan , Tang Peng-yu 
Published: December 2022

Abstract
Traditional spread spectrum techniques provide a strong anti-interference capability but a relatively low transmission rate. This is addressed by the parallel combination spread spectrum technique which provides higher transmission efficiency, security, and spread gain. Nevertheless, the receiver of a parallel combined spread spectrum system requires to distinguish multiple spread spectrum sequences. Therefore, any reception errors are propagated in the receiver hence leading to a larger number of errors. Moreover, spread spectrum sequences with different mode values experience different probability of errors at the receiver. The existing analysis of the error location in the parallel combined spread spectrum is only an estimate after countless experiments. In this paper, we theoretically analyze the probability of correct discrimination of parallel combination spread spectrum with different modulus values. Furthermore, according to the probability analysis of correct discrimination therefore the parallel combination spread spectrum is improved. This significantly reduces the bit error rate of the system and improves the reliability only with a slight degradation of transmission efficiency.
Load modeling of different type intelligent building considering thermal effect and dynamic electricity price
Authors: Tang Junci , Ge Yanfeng , He Huan , Cui Dai , Cui Jia , Xu Kun , Hu Zhen 
Published: December 2022

Abstract
In this paper, the intelligent building model is firstly established. And, the characteristics of battery in electric energy storage are compared. The distributed renewable energy is applied to the intelligent building. Secondly, considering the intelligent building load modeling under the influence of heat effect and dynamic electricity price mechanism, the intelligent building load modeling is analyzed. It adopts the verification generation modeling based on multiple constraints to make the modeling more accurate. Thirdly, the advantages of the algorithm are verified through the calculation example analysis. Finally, The modeling accuracy of commercial building is improved by 3.8%.
Industrial load identification based on sparse representation classification
Authors: Liu Meijie , Meng Zhen , Qiu Peng , Zhang Yan , Gao Mingze , Han Ni , Li ZhiMin 
Published: December 2022

Abstract
In this paper, sparse representation classification (SRC) model based on discriminant dictionary is proposed to train loads of different categories by K-SVD algorithm. Firstly, The absolute value of sparse coefficient and the category of atoms are used to determine the load category. Secondly, the identification of load types is improved in the traditional SRC method based on dictionary learning. Thirdly, the actual identify effect is optimized. Finally, an example is given to illustrate the recognition process. The discriminant dictionary-based SRC method is compared with the traditional SRC method. It proved the feasibility and effectiveness of the method.
Single-phase Grounding Fault Section Locating Technology for Distribution Network Based on Rough Set Algorithm
Authors: Zhang Xinyu , Wang Yang , Du Wei , Li Haifeng , Wang Zhibo , Gu Taiyu 
Published: December 2022

Abstract
With the continuous development of distribution networks, the proportion of the power electronic equipment that accesses distribution networks is increasing, which increases the system capacitance current, making the probability of single-phase grounding fault via intermittent arc in the system significantly increased. However, most traditional locating technologies are suitable for single grounding fault type via stable resistance, and cannot locate the fault above, which seriously impairs the reliability of the power supply of distribution networks. In order to solve the problem above, this paper puts forward the single-phase grounding fault section locating technology for the distribution network based on a rough set algorithm. This technology is able to obtain the phase current signals in the system for judgment, and analyze multiple characteristics of current signals with a rough set algorithm, thus determining the fault types in the system correctly. Moreover, it is also able to determine fault sections with proper section locating algorithms based on different fault types. Furthermore, it is able to locate sections of various fault types, such as resistance fault and fault via intermittent arc, with an expanded feasible region. Besides, it only makes a judgment based on phase current without collecting the zero-sequence voltage of the system, ensuring adaptability. Additionally, it is able to supplement and optimize fault type identification categories by adding condition attributes of fault characteristic analysis in the rough set algorithm, having certain engineering application values. In the end, the feasibility of this locating technology was verified with ATP power system simulation software.
Demagnetization Fault Diagnosis of Magnetic Coupler Based on STFT-S
Authors: Liu Luping , Sun Jianzhong 
Published: December 2022

Abstract
Magnetic coupler (MC) has been widely used in petroleum, chemistry and other industrial fields. However, demagnetization faults are easy to occur in permanent magnets when transporting high-temperature media. Demagnetization faults are difficult to detect due to the double-rotor structure of MC. To solve this problem, a demagnetization fault detection device for MC is established, and a short time Fourier transform method based on speed window function (STFT-S) is proposed. The demagnetization degree and fault pole location of MC under nonstationary conditions of velocity is determined by analysing the time-frequency characteristics of the STFT-S transform. Finally, the finite element simulation results verify the effectiveness of the proposed method.
Analysis of Power Load Characteristics Based on Adaptive Ensemble Clustering Algorithm
Authors: Luo Liqin , Zhu Chenxuan , Wang Chaowei , Long Yanhua 
Published: December 2022

Abstract
With the growing number of power users and more flexible power consumption, how to cluster the power load curves efficiently becomes particularly important. In order to improve the accuracy, effectiveness and rapidity of load clustering, an adaptive integrated fuzzy clustering algorithm was proposed in this paper. Firstly, the initial clustering centroids were obtained by the improved DPC algorithm; then, under the dual guarantee of Euclidean distance and membership, FCM algorithm was used to cluster load curves; finally, the optimal number of clusters was obtained by the improved adaptive method in the iterative process; thus, the autonomous and accurate clustering of power load curve was realized. The proposed algorithm, DPC algorithm and FCM algorithm were applied to the load clustering experiment of power system respectively. The comparative analysis shows that this algorithm is effective and superior for load curve clustering.
A two-tier game model based scheduling strategy for Virtual Power Plants
Authors: Zuo Juan , Wang WenBo , Hou XiangMin 
Published: December 2022

Abstract
Recently, there has been a lot of attention on how to enhance the management capabilities of distributed electricity production and demand aggregation by Virtual Power Plants (VPPs), which poses the challenge of leveraging their ability to participate in electricity markets to maximize operating profits. This paper analyzes the scheduling problem in fully distributed controlled VPP and proposes a two-level game model. In this model, the Stackelberg game is used to describe the interaction between Distributed Energy Resources (DER) and Energy Management System (EMS). On the other hand, the competition between DERs is formulated by the Cournot game. EMS sets its electric rate as single-leader, and DERs generate the optimal generation capacity accordingly as multi-follower. Then, we analyze and obtain the relationship between the demand and the resource supply to achieve market equilibrium on maximizing the utility of EMS and DERs. Simulation results show the analysis’s correctness and the proposed strategies’ performance improvement.
Intelligent Orchestration Algorithm for Power Backbone Optical Network with Service QoS Awareness
Authors: Liang Wenjuan , Liang Yutu , Zhu Wenhong , Deng Xiaozhi 
Published: December 2022

Abstract
The power backbone optical network has the shortcomings of low spectrum utilization, and high service blocking rate, which cannot satisfy the differentiated quality of service (QoS) demands of the power services. This paper proposed a power backbone optical network architecture that uses elastic optical networks (EONs) to improve frequency utilization, and proposes an upper confidence bound (UCB)-based intelligent orchestration algorithm for power backbone optical network. Simulation verified that the proposed intelligent orchestration algorithm can improve the performance of the intelligent bandwidth allocation and meet the requirements of differentiated QoS demands.
Study of the effect of treatment with non-equilibrium low-temperature plasma on the hygienic properties of lining leathers for shoe with genuine leather upper
Authors: Tikhonova N V , Zhukovskaya T V 
Published: December 2022

Abstract
the shoe grade is determined by the quality of the materials that make up the product package. Natural lining leathers for shoe with genuine leather upper should differ primarily by high moisture and vapor exchange properties to ensure an optimal microclimate of the inside of the shoe space. In the paper the application possibility of treatment of lining leathers for shoe with genuine leather upper with non-equilibrium low-temperature plasma to obtain a material with improved hygienic characteristics is justified. Because the operating conditions of lining materials for shoe with genuine leather upper are more determined by the process of contact with the surface of the foot than by environmental effect. Thus, the quality of lining materials for shoe with genuine leather upper is determined primarily by compliance with hygienic requirements, among which vapor and air permeability, hygroscopicity; resistance to sweat. In the study it was revealed that because of the treatment with NLTP HFC discharge of pigskin leathers, there is an increase in the parameter values of hygroscopicity by 34%, moisture-yielding capacity by 36%, vapor permeability by 38%, air permeability by 27%, the capacity to absorb sweat vapor by 33% and the capacity to exude sweat vapor by 42%. Consequently, the treatment with NLTP HFC discharge of pigskin leathers for shoe lining with genuine leather upper makes it possible to improve their quality by sequencing their structure, which in turn acts to increase the efficiency and intensity of moisture interchange processes between the material and the environment of the inside of the shoe space, increases the comfort of the latter and prevents potential adverse effect on human well-being.
Effect of Low-Temperature Plasma Treatment on The Properties of a Complex Wool-Containing Material
Authors: Fatkullina R R , Yarullin R M , Abutalipova L N , Khadysov B A 
Published: December 2022

Abstract
The article investigates a layer of felt in a complex material, which we intend as rehabilitation footwear element. The complex material consists of layers of rubber and felt, connected with polyurethane adhesive, and we design it for the manufacture of shoe-product sole. The layer of felt inside is in contact with the foot and serves as an insole. The felt was treated with low-temperature plasma (LTP) from the inside of the complex material. It was experimentally obtained the wettability index: for the complex material, containing a treated layer of felt, and a control untreated felt. The research obtained an increase in the hydrophilicity of the LTP-treated felt, which is explained by degreasing the surface, an increase in the porosity of the non-woven material «felt», as well as structural changes in the wool fiber due to plasma treatment. Plasma treatment of woolen felt layer can be recommended to increase the hydrophilicity of the surface and impart antibacterial properties to the inner («insole») surface of the complex material by applying infusions of medicinal plants, etc.
Simulation of the mixing process in a slot channel with jet injection
Authors: Kurbangaleev A A , Battalov A F , Kh Tazyukov F 
Published: December 2022

Abstract
The article presents the results of modeling in a two-dimensional formulation of the hydrodynamic process of mixing two streams of Newtonian fluids in a channel with jet injection. The mixing process takes place in a turbulent flow mode, without chemical and thermal interaction. The article considers the flow of a mixture in a flat slit channel when mixing two liquids. The first component of the mixture flows through the main wide channel. At a distance of 50 mm from the point of entry into the channel perpendicular to the main channel, there is a radial jet nozzle with a width of 1 mm, through which the second component enters the mixing channel. The article discusses several problems with different initial mixing rates of components. The characteristics corresponding to water and ethyl alcohol were taken as test components for mixing liquids. The simulation was carried out in the ANSYS-Fluent software package. The purpose of this work is to study the process of mixing two liquids in a slit channel. The article presents the results of modelling the mixing process.
Plasma modification physical and mechanical properties of nonwoven materials of medical masks
Authors: Azanova A A , Yu Galimzyanova R , Abutalipova L N , Khisamiyeva L G 
Published: December 2022

Abstract
The paper considers the influence of plasma flow of a high-frequency capacitive discharge at reduced pressure (as a potential sterilization tool) on the main physical and mechanical characteristics of a three-layer medical mask (spunbond-meltblown-spunbond). The treatment was carried out using argon and air as plasma-forming gases. It is shown that the breathability of the mask determines (limits) the breathability of the middle layer (meltblown). Plasma treatment in the modes under consideration does not significantly affect the air permeability and mechanical tensile strength of the composite layers of the mask. There is a slight increase in vapor permeability, an increase in the hygroscopic properties of the middle and inner layers, which indicates an improvement in the hygienic characteristics of the mask, but at the same time, the hydrophobicity of the outer layer is preserved. When plasma is used to sterilize medical masks, bacterial filtration efficiency and microbiological purity will be the main deciding factor.
Modification of the surface of nanostructured Bi0.95La0.05FeO3 ceramic by plasma
Authors: Gadzhimagomedov S. Kh. , Alikhanov N.M.-R. , Rabadanova A.E. , Emirov R.M. , Palchaev D.K. , Murlieva J. Kh. , Gadzhiev M. Kh. , Saypulaev P.M. , Ilyichev M.V. 
Published: December 2022

Abstract
Nanostructured ceramics of the composition Bi0.95La0.05FeO3 were fabricated, and the structure was studied before and after exposure to an argon plasma flow at a temperature of ∼ 600 °C for ∼ 30 minutes. Plasma treatment of the surface, with a positive effect of the formation of a monolithically conjugated structure and an increase in the size of grain crystallites, leads to a decrease in the proportion of the main phase on the surface to ∼70%. It has been established that compaction is up to ∼30% of the sample thickness.
Symmetrical form of the two-component fluid flow’s stability curve as a part of analysis devices
Authors: Kutuzova E R , Tazyukova A F , Kh Tazyukov F 
Published: December 2022

Abstract
The devices for analysis have different channels for mixing and separating flows. The media in most cases is multicomponent and predicts special properties. The constitutive equation FENE-P is chosen as a rheological model to describe a non-Newtonian fluid that has particles that can change their conformation. This model predicts properties such as viscosity anomaly, finite stress relaxation time, and dependence of the longitudinal viscosity on the longitudinal strain rate. For the non-Newtonian fluid the effect of the shape’s symmetry loss and manifestation of asymmetry are possible. The Weissenberg number (We) and the degree of stretching of the flexible particle (L2) are the determining parameters of the flows of such fluids. In this work the values of these modeling parameters, at which the flow behaviour changes so that the initial symmetrical flow form becomes unstable and turns into asymmetrical form even in laminar creeping flow (Re<<1) have been established. A number of numerical experiments have been carried out and the dependence of the manifestation of instability of the symmetrical flow form on the set of values of We and L2 has been obtained. The simulation results with the Newtonian fluid. The solution is obtained using the finite volume method (FVM) in the OpenFOAM software environment.