bluuebunny/crossref_metadata_2025_split huggingface dataset:
Overview of the application of digital construction in airport construction
Authors: Jia Zhiguo , Lv Jihong 
Published: February 2021

Abstract
Aiming at the current application status of digital construction in various industries in China, this paper analyzes the GIS and BIM technology used in the existing digital construction, and summarizes the application of GIS and BIM technology in the digital construction in the airport construction industry, which also analyzes the application value and development prospect of digital construction in the area of airport construction.
Influence of overloaded vehicles on pavement life based on WIM data
Authors: He Yulong , Li Jing , Xu Xiao , Li Ao , Liu Hua , Jiang Tianlin , Shi Kaixin 
Published: February 2021

Abstract
In this paper, the weight distribution characteristics of overloaded vehicles and the influence of overloaded vehicles on pavement service life are studied based on WIM data. Based on the vehicle weight data collected from weight in motion station, the vehicle weight distribution function of different axle type trucks and the weight overload ratio distribution function of different axle types are obtained by fitting. Equivalent single axle loads of the pavement under different weight limits are calculated based on the vehicle weight distribution function, and finally the pavement life growth factors under different weight limits are determined. The calculation results show that: the maximum overload ratio of two-axle vehicle can reach 340%; the number of six-axle overloaded vehicle accounts for more than 50% of the total number of overloaded vehicles, which is the largest proportion. Pavement life can be improved effectively by limiting load, and the road life growth factor shows a quadratic parabolic trend to increase with the decrease of load limit value. For two axle trucks with serious overload, the pavement life can be increased by more than 15 times with a strict load limit value.
Preparation of Nano-porous aerogels by supercritical drying
Authors: Zhili SUI , Zhaoguang LI , Fenghong ZHANG , Xiangyong ZHANG 
Published: February 2021

Abstract
Nano-porous silica aerogels are synthesized by two steps by the supercritical condition. By synthesized process, tetra-ethyoxysilane is used as raw material, isopropanol and H2O which is distilled after ion exchange was used as solvent, HCl and NH4OH are used as hydrolysis and condensation catalysts, glycerol is used as drying control chemical agent. Silica aerogels are obtained by supercritical drying condition after aging, surface modification and exchanging solvent. The effect of water, PH, temperature, and so on, are analysed at supercritical drying condition. The resulting aerogels are characterized by means of X-ray diffraction and scanning electron microscopy. It is found that the aerogels made by this method have high porosity, specific surface area and the structure is sponge with narrow particle and pore size distribution.
Application of digital construction whole process monitoring and management technology for airport asphalt pavement
Authors: Kong Fandong , Liu Kaidi , Cao Cheng , Du Xiaoyu , Jiao Huanjing 
Published: February 2021

Abstract
The construction and management of airport asphalt pavement project has the characteristics of large construction scale, high technology, many professionals involved, and high quality requirements. The traditional monitoring and management method that relies on manual on-site inspections and records is vulnerable to many factors such as environmental conditions and the ability of the implementer. It is difficult to ensure real-time monitoring of construction quality and data backtracking. With the rapid development of various advanced technologies such as global navigation satellite system(GNSS), geographic information system(GIS) and internet of things(IoT), digital construction monitoring and management technology for airport asphalt pavement has emerged as the times require. Digital construction technology is implemented through professional testing equipment, data collection, data integration, and system installation. It covers the entire construction process of airport asphalt pavement from the background management of the mixing plant, the transportation management of vehicles to the field management of paving and compaction. The technology monitors the construction quality, guarantees the construction progress, improves management efficiency, and saves costs, which has great social and economic benefits.
All-in-one Power Conversion System for a Smart Factory
Authors: Kim DongJin , Kwon WanSung , Kim YongSu , Park Jaehyo , Seo SangWon , Park JongWoo 
Published: February 2021

Abstract
This paper investigates the incorporation of a PV-ESS linked, all-in-one power conversion system (PCS) at a small factory, in an attempt to improve the factory’s resilience against the increase in load due to facility expansion. The aforementioned factory was installed with 210kWh PV and 550kWh ESS, both of which were simultaneously managed by 250kW hybrid power conversion system. This independent operation of the factory through the PCS was proven to be efficient and economical, because of the reduced power usage and the sale of surplus electricity.
Substation operation ticket system based on natural language analysis and intelligent reasoning
Authors: ming Chen , dekai Chen , yupeng Jiang 
Published: February 2021

Abstract
[Background/Reason] The operation ticket system is an important measure to ensure the safety of substation operation. At present, the issuance and review of substation operation tickets rely on manual operation knowledge and experience, and there are problems such as low work efficiency, lack of standardization, and human error. The risk of grid operation is reduced. [Method/Process] This paper proposes a substation operation ticket system based on natural language analysis and intelligent reasoning. It uses typical/standard operation tickets as the basic corpus and builds a natural language analysis model based on manual labeling to achieve compliance with the operation tickets. Sexual inspection, deduction and comparison of equipment status. Finally, combining the primary wiring diagram of the substation and the operation ticket to construct the equipment relationship knowledge map and the equipment operation knowledge map, use the Neo4j graph database for storage, and realize the intelligent drafting of operation tickets based on the graph search method. [Results/Conclusions] The research results have been implemented and applied in three substations in a certain area, verifying that the system has a high degree of intelligence and versatility, and can effectively solve the existing problems of standard invoicing and audit errors, and improve operation The work efficiency of personnel and the safety control level of power grid substation operation.
Tree Barrier Prediction of Power lines based on Tree Height Growth Model
Authors: Jinqiu Wu , Hanjun Liu , Jiakai Yang , Yuhao Chen 
Published: February 2021

Abstract
Aiming at the problem that the hidden trouble of tree barrier seriously threatens the safe operation of power lines, the typical tree species in the corridor of power lines in Guangdong area are investigated and studied. Firstly, a tree height growth prediction model based on Richard’s equation is established. The correlation deviation test results show that the model can accurately predict the tree height. The hidden trouble of tree barrier under line and the hidden trouble caused by wind deviation of wire are analyzed. Finally, the model for predicting the clearance distance from tree to power lines is established. By predicting the clearance distance between wire and tree, the functions of real-time detection of hidden trouble of tree barrier and risk assessment and prediction of tree barrier are realized. It avoids the flashover fault caused by the excessive growth of trees, and ensures the safe and stable operation of power lines.
Research on Market Mechanism and Scheme Design of Yunnan Demand Response
Authors: Ma Gaoquan , Zhang Fan , Ding Wenjiao , Yang Dongyuan , Huang Yifan , Gao Ciwei 
Published: February 2021

Abstract
In order to cope with the changes of participants, working mechanism and business model after the deregulation of power sales side under the new situation, and to improve the current situation of seasonal and periodic power shortage in Yunnan Province, the implementation scheme of Yunnan demand response is sorted out and its characteristics are analysed from the aspects of participation mode, implementation form and response type. Based on the lack of basis for the demand response subsidy price and the imperfect transaction mechanism in Yunnan demand response market mechanism construction, this paper proposes a price mechanism design scheme of charging seasonal peak electricity price for peak shaving demand response, collecting funds according to the grid electricity of power generation enterprises during valley filling period, and dynamically adjusting the price according to the change of supply side cost caused by demand response. Additionally, the trading mechanism of demand side response participating in day ahead market and real-time market is also proposed.
Local Autonomous Optimization based Virtual Power Plant Dispatch Strategy
Authors: Zhao Jianli , Zhang Shaodi , Gao Ciwei , Ma Sisi , Wei Siya , Zheng Hongjuan 
Published: February 2021

Abstract
The load of central air conditioning can be transferred or reduced through reasonable control and has become an effective alternative resource for the adjustable capacity of power grid. In the demand response mode, the central air-conditioning load can be aggregated to form a virtual power plant to participate in the unified grid dispatching operation. In this paper, the virtual energy storage model of the central air-conditioning system is built based on the integrated thermal inertia. The paper also proposed the internal coordination control mechanism based on multiple agents. Furthermore, the regulatory potential of the central air-conditioning system is evaluated from the perspectives of adjustable power and sustainable time according to the virtual energy storage characteristics. The virtual power generation unit is constructed by means of comprehensive coordinated control so as to realize the standardized unified modeling of central air conditioning system. Finally, This paper proposes the strategy of virtual generating unit dispatch based on local autonomous optimization and the operation strategy of virtual power plant participating in grid peak regulation. Through the strategy the distributed optimal control of power generation resources is realized in virtual power plant and the pressure on virtual power plant operators is released. This paper has guiding significance for virtual power plant to participate in the actual dispatching operation of power network.
Comprehensive evaluation method of micro-energy harvesters for power supply of outdoor wireless sensors
Authors: Guo Luyang , Wang Shouxiang , Chen Haiwen , Yang Aichao , Liang Bin 
Published: February 2021

Abstract
There have been many solar or wind micro-energy collection technologies for outdoor wireless sensors, but it is difficult to compare them horizontally and choose the appropriate scheme. To overcome this problem, this paper proposes a comprehensive evaluation method of micro-energy harvesters which includes an evaluation matrix composed of three types of indexes and the corresponding test method. After the evaluation matrix is obtained by testing, a CRITIC-based weight calculation method is used to get a comprehensive score. Finally, ten commonly used solar or wind micro-energy harvesters in five typical regions are compared horizontally by the proposed method. The results show that the evaluation method can comprehensively consider various factors, and harvesters with higher comprehensive scores tend to have more balanced performance in all aspects. Furthermore, in regions with rich wind resources, the wind and solar harvesters have complementary time-domain characteristics.
Research on Optimal Planning Method of Distribution Network Considering Emergency Power Supply Configuration and User Differentiated Reliability Requirements
Authors: Zhang Zhen , Li Congli , Li Junjie , Gao Mengke , Deng Jiaming , Li Peng , Wang Zixuan 
Published: February 2021

Abstract
Considering the configuration of emergency power supply in the distribution network and the differentiated reliability requirements of end users, the optimization planning model is proposed in this paper, which can harmonize economy and reliability. The model aims at the optimal total cost of the distribution network, considers the user’s differentiated reliability indicators, solves the results of the location and capacity of distributed power sources and emergency power configuration. Finally, the optimal solution is selected by the particle swarm algorithm into the program. Three scenarios are set on the IEEE-33 node system for simulation testing. The results show that this method can effectively meet the consequence.
Research on frequency modulation of DFIG wind turbines auxiliary power grid based on improved frequency control
Authors: Zhang Hongpeng , Tian Zengyao , Li Dan , Wei Jingxiao , Liu Siqi , Ye Peng 
Published: February 2021

Abstract
With a large number of DFIG wind turbines connected to the power grid, in order to improve the frequency fluctuation caused by its decoupling, this paper first analyses the current situation of DFIG wind turbines participating in the primary frequency modulation of power grid, and establishes the corresponding model based on the above analysis. According to the commonly used inertial control methods, a frequency modulation method for auxiliary power grid of DFIG wind turbines based on improved frequency control strategy is proposed. Through the simulation of actual power grid model, the grid frequency fluctuation has been effectively alleviated after adding frequency control link to DFIG wind turbines, and it is concluded that the higher the wind power penetration, the more significant the frequency improvement effect.
Unit Commitment with Tunable Frequency Response from Wind Turbine Generators
Authors: Liu Juelin , Yu Juan , Rui Song , Huang Junkai , Xuebin Wang , Li Wenyuan 
Published: February 2021

Abstract
Based on the natural inertia on the rotors, wind turbine generators can provide both inertia response and primary frequency response to support the system frequency stability. In this paper, by considering the coordinated optimization of frequency response, a unit commitment with tunable frequency response from wind turbine generators is proposed. The relationship between inertia response and primary frequency response is analyzed. A frequency response correlation constraint is proposed to eliminate the second frequency nadir. Considering the system frequency stability constraints and the feasible region of frequency response provided by wind turbine generators, a security-constrained unit commitment model with tunable frequency response is established. According to the actual operation mode of the power system, a bi-level algorithm is adopted to calculate the frequency response parameters of wind turbine generators. The simulation result of the GB 2030 system demonstrates that the proposed method can reduce operating costs while ensuring system stability.
An Operation and Maintenance Training Platform for Distribution Terminal Unit
Authors: Pan Zhiyuan , Li Hongwei , Wang Jing , Peng Ganrong , Li Guanghong 
Published: February 2021

Abstract
Distribution terminal unit is an important part of distribution automation. The application and maintenance of distribution terminal unit is directly related to the operation effect of distribution automation. In order to improve the technical level of power company maintenance personnel, the distribution terminal unit operation and maintenance training platform is designed. It is also beneficial to understand the principle of distribution terminal unit, the action process of distribution automation, and master the daily operation and maintenance operation of distribution terminal unit. According to the actual faults in the distribution automation, the platform realizes the primary fault simulation of the distribution network and the secondary fault simulation of the distribution terminal unit. Then the maintenance personnel will carry out operation and maintenance operation to remove the fault. Its application improves the level of operation and maintenance operators.
Power Transformer Condition Assessment Method based on Improved Rough Fuzzy K-means Clustering
Authors: Li Chunpeng , Hu Xinyuan , Guan Guofei , Li Zhongwen , Luan Qiqi , Jiang Feng 
Published: February 2021

Abstract
As an important equipment of power transmission and transformation, power transformer plays a direct role on the reliability of power supply. Considering the low proportion of power transformer fault data and the overlap boundary with normal data, an imbalance measurement of cluster size is introduced and a power transformer state assessment based on rough fuzzy k-means clustering is proposed. The developed method can not only judge the type of fault that has occurred, but also predict the possible future faults of power transformers. The effectiveness of the designed method is verified by experimental comparative analysis.
Research on transformer condition evaluation technology based on vibration signal analysis
Authors: Hao Ma , Chuang Yao , Minghui Duan , Jufang Wei , Xin Zhang , Cong Zhao 
Published: February 2021

Abstract
In order to analyze and judge the looseness defects of transformer core and winding, the causes and characteristics of core and winding vibration were analyzed theoretically. It could be seen that the resonance frequency and frequency spectrum distribution of vibration signals at different measuring points were not the same.The vibration signals of different measuring points of the transformer shell under the conditions of normal core and winding looseness and different degrees of looseness were tested experimentally. Then the method for judging the looseness defect of core and winding based on the content of fundamental frequency signal was proposed, which had advantage in effectiveness and convenience. Finally, the further research direction was pointed out to promote actual using.
A collaborative planning method of distribution network including EV charging piles and Distributed Generations
Authors: Yang Haiyue , Liu Dong , Yu Lu , Liu Eryong , Mei Xiaohui , Wang Shouxiang 
Published: February 2021

Abstract
With the growing penetration rate of distributed generations (DGs) and large number of unordered charging electric vehicles (EVs), the distribution network (DN) is facing more challenges than before. Therefore, the DN planning integrated of EVs and DGs is the primely problem. Firstly, an traffic network model and a distributed power supply output model are established to simulate the actual traffic network flow distribution through the principle of user equilibrium flow distribution. Secondly, an improved adaptive free search algorithm is proposed to coordinate site selection planning of EV charging pile and DG considering the factors of economy and users’ satisfaction of charging. Finally, taking the modified IEEE 33-node distribution network as an example, the proposed model and algorithm are simulated and verified. The simulation results show that the proposed model and programming method are feasible and effective.
Fault recovery strategy of distribution networks with multiple EHs for reliability improvement
Authors: Jin Qiang , Ma Weijing , Hu Ping , Qi Xiaoguang , Zhang Xianliang , Pan Yongchao , Zhang Lu 
Published: February 2021

Abstract
It has become a trend that user-side electricity/heat/gas energy supplies and loads are connected to the distribution network with energy hubs (EHs). The integrations of EHs bring new opportunities for the improvement of power supply reliability of distribution networks. For the distribution network with multiple EHs, a fault recovery strategy for the improvement of power supply reliability is proposed in this paper. Combining the models of EHs and radial distribution network, the typical structure of distribution network with multiple EHs is analyzed. Considering the scope of the fault and EH optimal dispatching, a failure recovery strategy for reliability improvement of distribution network with multiple EHs is proposed. With the objective of minimum power outage losses and operating costs, an optimal scheduling model for multiple EHs island operation is established. The analysis of the calculation example shows that the grid-connected operation of EH can improve the reliability of distribution network, and the optimal dispatch of the EH can effectively reduce the loss of power outage during the failure.
Optimal Restoration Strategy Based on Resilience Improvement for Power Transmission Systems Under Extreme Weather Events
Authors: Yu Z.Y. , Li Z.P. , Qian T. , Huang K.C. , Chen X.Y. , Tang W.H. 
Published: February 2021

Abstract
In the past few years, extreme weather events have threatened operations of power systems. The improvement of resilience for power system becomes crucial. This paper proposes an optimal restoration strategy, considering the resilience index of power transmission systems in restoration processes. Firstly, a typhoon is taken as an example to establish an extreme weather event impact model to obtain the failure probability of lines. Then Monte Carlo method is used to generate fault sets. For each restoration time point, the optimal restoration model is used to acquire the maximum recovery loads. The resilience index of system can be obtained by the resilience assessment methodology during restoration. Finally, the proposed strategy is compared with distance-based strategy in IEEE 6-bus system, which demonstrates the superiority of the proposed strategy.
Incentive-based Demand Response for a Virtual Power Plant
Authors: Li Yingyi , Luo Zhe , Liu Lifeng , Sun Ke , Yang Xuan , Huang Tian’en 
Published: February 2021

Abstract
With the development of Energy Internet, the virtual power plant (VPP) has been regarded as a creative and attractive form to realize the integration of different energy resources. The VPP could make advantages of demand-side participation and distributed energy resources (DERs) to eliminate the peak loads and thus to maintain the stability of power grid. Here, an incentive-based demand response (DR) scheme is designed to model the energy transactions in the VPP internal market. This scheme considers different attitudes of different kinds of consumers according to their DR bid offers. Especially, we also introduce the dissatisfaction function to model the impact of load reductions on the enthusiasm of consumers. With the objective to minimize VPP operation costs, the proposed scheme is formulated as an optimization problem with guaranteeing the interests of consumers. The experimental results show that the proposed incentive-based DR scheme could encourage consumers to reduce more load demands by offering corresponding incentive prices, which helps to decrease the total operation cost of the VPP and also improve the profits of consumers.