bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical Simulation of Electrode Structure on High Voltage Pulse Discharge Characteristics
Authors: Zhang DongYang , Gao MingCheng , Guo Gang 
Published: April 2023

Abstract
For the study of the different electrode structures of the high voltage pulse discharge breakdown process of the insulating medium, the numerical simulation software is compiled to establish two kinds of the electrode structure of high voltage pulse discharge three-dimensional model, finite element difference method to simulate the expansion of plasma channel, the discharge characteristics of electrode structure internal voltage, and current of plasma channel and the impact of energy consumption. The simulation results show that, compared with the needle-needle electrode structure, the needle-plate electrode structure has a shorter time to reach the critical field strength of distilled water smaller breakdown voltage, shorter time to establish the discharge channel, smaller equivalent resistance, faster extension speed of the discharge channel, and less energy consumption for breakdown. And other conditions are the same. The results of this study can provide a theoretical reference for the structural design of high-voltage pulse-crushing electrodes.
Application and Research of High-Pressure Energy Storage Technology in Aircraft Hydraulic System
Authors: Gao Lei , Chen Tao 
Published: April 2023

Abstract
The power demand of the hydraulic system in a certain type of aircraft was analyzed. Within the current design of the hydraulic system, the instantaneous power shortage is inevitable in the launching stage. In order to achieve instantaneous high power and improve the performance of the aircraft, a new scheme in which a new type of pressure boost accumulator was applied as a power compensation device was suggested in this work. The accumulator volume was optimized and its effect on the system was investigated using the whole hydraulic system model implanted in AMEsim software. Based on the requirement of the weapon hatch, the parameters of the pressure boost accumulator were simulated and determined. The simulated results showed that the pressure boost accumulator could be low-power charged and output instantaneous high power to drive the weapon hatch. This new scheme can be applied to decrease the installed power of the hydraulic system.
Research on Range Extended Electric Vehicle Based on Cruise
Authors: Xu Chuyuan 
Published: April 2023

Abstract
Recently, extended-range electric vehicles are a new solution to energy shortage and environmental pollution, which effectively increases the range of electric vehicles, extends the battery life, and reduces fuel consumption. Therefore, this paper mainly focuses on the design of the EREV powertrain, building a vehicle model by using AVL CRUISE to simulate and verify the calculated parameters of the design.
Analyzing the structural characteristics of the extended-range electric vehicle and determining the vehicle’s basic parameters and performance indexes using the Aratou Free 4WD hybrid as the prototype were the first part. In this part, the drive motor on the power system, battery, and range extender were selected based on the calculated parameters. The AC asynchronous motor, ternary lithium battery, and four-stroke gasoline engine were chosen as the components of the power system in the EREV. Building the vehicle model by using the AVL Cruise and developing the calculation tasks such as cyclic driving conditions, steady-state driving performance analysis, full-load acceleration performance calculation, and hill-climbing performance analysis were the second part. After the above steps, the simulation results analysis report showed that the powertrain design meets the target and potential of electric vehicle development. This paper provides a reference for comparing the dynamic property and economy of the extended-range electric vehicle with traditional fuel vehicles.
Analysis of Tunable Refractive Index Characteristics of the Magnetic Fluid
Authors: Zeng Wenshi 
Published: April 2023

Abstract
The influence of magnetic field intensity(H
MF) on the refractive index of magnetic fluid (n
MF) at room temperature is analyzed. The optical fiber end reflection method based on the Fresnel principle is used to carry out relevant experiments. The corresponding relationship between n
MF and applied magnetic field is studied in detail. n
MF controls characteristic curve of magnetic fluid with a volume fraction of 0.36% is obtained. According to the experimental results, the H
MF sensitivity of MF is about 0.937~0.948 RIU / T.
Spatial positioning method based on UWB antenna array layout
Authors: Yang Jie , Hu Yansi , Sun Dong , Wan Bowen , Sun Yun , Wang Hongxing , Gao Zichen 
Published: April 2023

Abstract
Aiming at the problem of spatial positioning of dynamic targets in traditional power systems, this paper provides a cost controllable and high precision UWB antenna array layout method for spatial positioning to solve the problems of low precision and multiple restrictions of ultra wideband in spatial environment. First, a base station is set in each area. The base station contains a group of UWB antenna arrays composed of multiple antenna pairs. The distance L from the base station with the location tag is accurately measured through the UWB. Then, the UWB antenna array uses the PDOA phase difference principle to measure the direction of the signal. Finally, the spatial azimuth of the UWB signal from the tag to be located relative to the base station is calculated. The feasibility of the proposed method is verified by an example, which can significantly improve the positioning accuracy. The proposed method can provide strong technical support for intelligent operation and maintenance of power system and safe production.
Vector Control of PMSM Based on Improved Sliding Mode Observer and Controller
Authors: Li Xinyan , Xu Hanbin , Wei Yiying , Zheng Yanling , Zhou Yongping 
Published: April 2023

Abstract
This paper presents a sensorless speed control method of permanent magnet synchronous motor (PMSM) applying sliding-mode control theory, to enhance the observation precision and improve robustness of control system. Firstly, an improved full-order sliding mode observer (FSMO) with sigmoid function is gifted to weaken the high-frequency (HF) chattering caused by conventional sliding mode observer (SMO). The quadrature phase-locked loop (PLL) is used to calculate high-precision rotor location and speed, avoiding the use of filter. Then the nonsingular fast terminal sliding mode controller (NFTSMC) in speed controller is introduced to replace traditional proportional integral (PI) controller to improve the dynamic performance of control system. The outcomes verify that the presented control method enhances the overall observation precision, suppresses HF chattering, and increases dynamic and stable state response of PMSM.
Study on Structure health monitoring method of space vehicle based on PVDF piezoelectric film
Authors: Bai Yan , Xiao Chuncheng , Wei Zijian , Yin Lan 
Published: April 2023

AbstractAt present, health monitoring technology of large structures has been paid more and more attention, among which structure measurement system based on PVDF piezoelectric film sensor has been widely used in various fields. To solve the problem that large structural parts of aerospace are easy to be damaged, a load measurement system based on PVDF piezoelectric film sensor is built in this paper given the complex design structure of aerospace. A large cylinder of aerospace is taken as the test part, the stress state of structural parts is measured online, and the corresponding load value is obtained. With the load value, damage to the health state of the structural parts when they are overloaded by external force can be avoided.
Mid-point potential balancing in three-level inverters
Authors: Lyu Mingzhe , Man Chenxi , Zhou Tinglian 
Published: April 2023

Abstract
Three-level inverters are among the best options for high voltage and high-power applications because of their high capacity, high rated voltage, low harmonic content of the output current, and minimal switching losses. However, the issue with mid-point voltage balancing is an inherent drawback of three-level inverters. The unbalanced mid-point voltage of a three-level inverter leads to low harmonics in the output voltage, causing voltage distortion and seriously reducing the power quality. The unbalanced mid-point voltage also puts more voltage strain on the DC bus side and power switching tubes. As a result, this paper analyzes the remedies for NPC-type three-level inverters’ fluctuating neutral potential and offers hardware and software solutions to regulate the potential neutral balance. It outlines the two primary mid-point potential control strategies depending on the SVPWM and SPWM strategies, provides a detailed study of the software approach, and briefly examines the DMWPWM strategy’s best solution. There are several potential applications for the mid-point potential balancing control method. It may significantly enhance the power quality of rectifiers and inverters and has considerable advantages for real-world uses like solar and wind energy production.
Research on multi-sound source localization performance based on leaf-shaped microphone array
Authors: Wang Ningning , Wei Yonghe , Li Zonglin 
Published: April 2023

Abstract
In the research of multi-sound source localization, the geometric rules for the spatial arrangement of microphone arrays play a decisive role. When faced with multiple sound sources with close positions, traditional typical arrays are difficult to accurately locate the desired signals. Therefore, this paper proposes a leaf-shaped microphone array based on the theory of bionic sunflower spiral arrangement. When the incident signals are multiple sound sources with close positions, combined with the delay-sum beamforming algorithm, the performance of the leaf-shaped array is analyzed from the perspective of positioning accuracy and resolution. Compared with the uniform circular array and Arcondoulis spiral array, the results show that the leaf-shaped array has better resolution and anti-interference ability in the case of multiple sound sources with close positions.
Construction Quality Inspection Method of Substation Fabricated Structure Based on 3D Laser Scanning
Authors: Ye Jianqiang , Zhang Xiaochen , Xu Bo 
Published: April 2023

Abstract
The substation construction project is highly professional and comprehensive, requiring multiple disciplines’ cooperation. It is greatly affected by geographical and environmental factors and has the characteristics of high management requirements and difficult quality control in the construction process. Based on the good initial position of the point cloud to be registered, if this requirement cannot be met, the registered point cloud data is prone to the optimal local solution. Thus, this paper introduces three-dimensional laser scanning to detect the construction quality of the substation assembly structure. On this basis, the data registration method realizes the accurate point cloud registration, and the data’s main feature vector is extracted through a linear transformation. Through the spatial transformation of the principal axis direction, the registration of the point cloud number is completed. The problem of the optimal local solution of registration is effectively solved. The point cloud data model is created by actual data acquisition, and the influencing factors of reverse construction of the geometric model are analyzed. The specific implementation scheme is put forward to ensure the accuracy of the geometric model construction. The test verified the reasonable and effective application of 3D laser scanning in the prefabricated building installation. Besides, the effective method of the high-precision point cloud model data output is determined.
Control and Protection Strategy Study of VSC Station Fault at Hybrid HVDC Transmission System
Authors: Tian Qi , Liu Lulu , Zheng Kuan , Su Guoyun , Si Zhilei , Hu Yongjie 
Published: April 2023

Abstract
LCC-VSC UHV hybrid cascaded DC transmission system will face over-voltage problems caused by power surplus when receiving terminal VSC station fault occurs. An over-voltage suppression strategy based on the action input of a high-voltage controllable arrester and the stepwise blocking of non-fault VSC at the receiving end is proposed, and a dynamic simulation test system is built to verify that the stepwise blocking protection scheme can effectively reduce the DC voltage stress of fault VSC by about 25.9%. Based on the test results, the effectiveness of the over-voltage suppression scheme of VSC at the receiving end in practical projects can be demonstrated by analogy.
Design of Lithium Battery Management System of Hydrogen Emergency Vehicle
Authors: Wang Qinbin , Liu Zhigang , Liu Shi , Cai Ri , Liu Ming 
Published: April 2023

Abstract
The hydrogen emergency power supply vehicle is mainly powered by a pure lithium battery power supply. Therefore, the reliable operation of the power supply and the analysis of charging characteristics play an important role. A battery management system for emergency vehicle power supply is designed in this paper. Through the battery management system, battery information collection, battery information analysis, and control management are carried out to realize the reliable operation of the power supply. The battery management system adopts the active equalization method for balance management, which improves the balance efficiency, improves the health status of the power supply, and extends the life of the power battery pack.
Simulation Study of Improved DDSRF-PLL under Distorted Grid Voltage
Authors: Sun Keqiang , Yang Guozhi , Huang Tailin 
Published: April 2023

Abstract
When the grid voltage is distorted and harmonic and DC components are mixed, the phase locking accuracy of decoupled double synchronous reference frame for phase-locked loop (DDSRF-PLL) will be greatly reduced. This paper proposes an improved DDSRF-PLL(IDDSRF-PLL) structure based on Frequency Adaptive Sliding Discrete Fourier Transform (FASDFT) filtering. A cascade SDFT structure is adopted for FASDFT filtering. The SDFT with fixed sliding window width at the front stage extracts the fundamental wave signal of power grid voltage to eliminate the influence of harmonics and DC components. The latter SDFT detects the sliding window width of power grid frequency update in real time through a nonlinear tracking differentiator (TD) to suppress spectrum leakage. Then DDSRFT-PLL is used to separate the positive and negative sequence of the fundamental signal and lock the phase. Finally, the simulation results in Matlab/Simulink verify the correctness and effectiveness of the proposed method.
PV Distribution Network Planning Method Considering the Cost and Effectiveness of Voltage Control
Authors: Shao Jingwei , Hua Ke , Xu Jun , Zhou Weidong , Sun Ran 
Published: April 2023

Abstract
The large-scale grid connection of distributed power sources can save energy, reduce emissions, and improve the flexibility of the power supply, but the volatility and uncertainty of its power output lead to voltage fluctuations and power quality problems, among which voltage problems have become an important factor inhibiting the large-scale access of distributed power sources, posing new challenges to the grid planning and operation. To address the grid voltage crossing problem after PV grid connection, firstly, a multi-time scale voltage control model based on voltage control coefficients is established to achieve maximum network safety and economic satisfaction; the problem is then solved using a variety of group traction differential evolutionary algorithms with the objective function being the minimum annual integrated cost and the maximum percentage of clean energy generation. This method offers a strong theoretical and technical guarantee for the planning of distributed power access to the distribution system.
Analysis of wind power output characteristics and output prediction
Authors: Ren Yiming , Zhou Renjun , Li Jincheng , Qin Zhichao 
Published: April 2023

Abstract
A fuzzy clustering method and a prediction correction method based on the Copula function are used to establish an analytical model of wind power generation output characteristics. It also predicts the expected and corrected values of its power generation to alleviate the pressure on the grid caused by the high proportion of random new energy sources connected to the grid. Based on the natural properties of wind, a new characteristic index based on the traditional load characteristic index and the new energy output curve is proposed to quantify and evaluate the characteristics of new energy power generation. The results show that the method proposed in this paper can effectively reduce the influence of climate change on output prediction; in comparison to the traditional index, the new index is more refined and instructive.
Evaluation of the autonomous and controllable degree of secondary substation equipment based on fuzzy comprehensive evaluation method
Authors: Wang Zhiyuan , Pu Weixing , Zhang Dongxin 
Published: April 2023

Abstract
The demand for autonomy and controllability of substations is increasing, and there is still a lack of specific methods to evaluate the degree of autonomy and controllability of secondary substation equipment. Given the above situation, firstly, the principle of an autonomous and controllable evaluation system is established. On this basis, the factors affecting the autonomous and controllable level of equipment are analyzed in depth, and the specific evaluation indicators of the autonomous and controllable degree of secondary equipment are determined. Then the fuzzy comprehensive evaluation method is used to establish the evaluation model of the degree of autonomy and controllability of secondary substation equipment. Finally, the specific examples are evaluated. The results show that the autonomous and controllable degree of the equipment has indeed increased after the autonomous and controllable improvement, which verifies the accuracy of the evaluation model. The evaluation model can also provide direction and guidance for the autonomous and controllable improvement of secondary equipment in substations.
Transformer DGA Fault Diagnosis Method Based on Stacked Sparse Auto-Encoders
Authors: Peng Yuxuan , Fu Qiang 
Published: April 2023

Abstract
In the field of transformer fault diagnosis, the imbalance of fault samples seriously affects the fault identification performance of the diagnosis model. Focusing on the problems of low accuracy and high leakage rate of diagnosis model caused by unbalanced fault samples of transformer, a transformer fault diagnosis method is proposed. First of all, the Borderline SMOTE algorithm is used to balance the fault data set from a few samples on the boundary, so as to achieve the effect of power transformer fault sample equalization. Secondly, a diagnosis model of the stacked sparse auto-Encoders with the gas in oil as input characteristic parameter is built. Finally, an evaluation system consisting of accuracy rate, recall rate and F1 score is selected to compare the diagnosis effect of the model before and after category equalization, the experiment proves the effectiveness of this method.
Research on the cooperative control strategy of output current in a distributed generation system
Authors: He Li , Sun Jun 
Published: April 2023

Abstract
In the ship degaussing system, a distributed power system is adopted, in which a single power module drives an independent coil load respectively. To ensure the degaussing effect, it is necessary to ensure the dynamic and static integrity of the load current. If an appropriate cooperative control strategy is not designed, the dynamic consistency of output current will be greatly affected by the difference in load. Therefore, this paper designs the cooperative control strategy based on the multi-agent consistency theory and proves the stability and consistency of the control strategy through the theory of discrete state space equation and graph theory. Through the simulation and experiment of multi distributed power system, it is verified that the control strategy has a good effect on improving the output current consistency of the power system.
A method based on rotated object detection to detect defects regarding distance in strain clamps
Authors: Du Qiliang , Zhou Huangze , Qu Fengrui , Tian Lianfang 
Published: April 2023

Abstract
Strain clamps in the transmission line have a vital role. With X-ray inspection in the transmission line, X-ray images to check defects of the tensioning line clip method have already become the mainstream method. In this paper, we concentrate on the strain clamps’ steel anchor end and strand distance defects. We propose a method based on the rotated object detection model RoI Transformer with KFIoU loss to extract the diameter of the steel anchor tube as a reference to determine whether the distance is too long. We first obtain the rotated bounding boxes of the steel anchor and the strand, then calculate the distance between the steel anchor end and the strand and the diameter of the steel anchor by rotated bounding boxes, and finally determine whether there is a defect. Through the study of this essay, the defect detection of strain clamps realizes with high accuracy which has an essential reference for the quality inspection of tension clamp crimping in engineering applications.
Multi-operation state traction control of regional coal-fired and gas-fired combined power generation system
Authors: Wang Pengyu , Yao Senjing , Wei Zhichu , Yang Mingrui , Yang Ping , Chen Yansen , Zhou Yue , Xu Yize 
Published: April 2023

Abstract
The traditional dispatching model and strategy of coal-fired and gas-fired power units are difficult to take into account the minimum total cost of power generation and the stable output of each unit. Therefore, this paper proposes a staged traction control model of coal-fired and gas-fired combined power generation, aiming at the minimum total power generation cost and stable output of the units. Based on the safe operation constraints of the regional coal-fired and gas-fired combined power generation system, the particle swarm optimization algorithm is adopted to solve the traction control strategy of the regional coal-fired and gas-fired combined power generation system in multiple operation states. The example simulation shows that the traction control strategy of regional coal-fired and gas-fired combined power generation systems in multiple operating states can realize flexible, coordinated control of each unit. Based on quickly responding to the change in load demand, it meets the minimum total power generation cost of regional coal-fired and gas-fired combined power generation systems. It makes the unit output stable to prolong the service life of the unit.