Research on Multi-party Data Secure Interaction Technology for Energy InternetZhang, X J; Miao, S W; Zhu, Y Y; Lin, Z Q; Hu, B J; Jiang, L; Cao, J Y
doi: 10.1088/1742-6596/2276/1/012017pmid: N/A
Aiming at the problems of the energy Internet interaction process, which involves more users and intermediate links, and each participant is independent of each other, information asymmetry, and participants do not trust each other, this paper proposes a blockchain-based energy Internet multiparty data interaction model to build a data circulation architecture, including four layers, which are data sensing layer, network transmission layer, data processing layer and application service layer, to realize identity association, cross-domain access, It can realize the basic functions such as identity association, cross-domain access, trust evaluation and privacy protection, and effectively guarantee the secure interaction of multi-party data in the energy Internet.
Numerical simulation of gas-liquid two-phase flow on an attitude control systemZhu, Fengqi; Liu, Wen; Li, Xiaobei; Li, Zhenjiang; Yan, Tiantian
doi: 10.1088/1742-6596/2276/1/012040pmid: N/A
This paper introduced an attitude control system, which used saturated carbon dioxide as a medium. Through energy conversion, the system converted the pressure energy of gas-liquid mixed carbon dioxide into velocity energy and formed supersonic flow through the nozzle to generate thrust and torque. Compared with the compressed gas attitude control system, the carbon dioxide system had a better compelling specific impulse. With the continuous consumption of the medium, a large amount of liquid carbon dioxide was transformed into a gaseous state. Simultaneously, the pressure variation was slight, which was conducive to control. With a higher initial temperature, more liquid carbon dioxide was consumed, and the thrust was more significant under the same conditions of tank volume and carbon dioxide mass; meanwhile, the faster the temperature decreased.
Damage analysis of wind turbine blade with different stacking parametersZhang, ZhiQiang; Qiao, YinHu; Wang, ShuaiShuai
doi: 10.1088/1742-6596/2276/1/012001pmid: N/A
Considering the damage and failure of wind turbine blades under gravity, centrifugal force and aerodynamic load, the influence of blade laminating parameters to the damage characteristics of wind turbine blades is studied. Different stacking schemes were designed by changing the stacking angle, stacking sequence and the ratio of ±Xn in the material. The maximum stress position of the blade was analyzed. At the same time, the failure factor of Tsai_Wu was used as the failure criterion to analyze the possibility of blade failure. The results show that the maximum stress of the blade appears at the junction of the leading edge web and the airfoil near circular airfoil and DU_35A17 airfoil; in the range of 40° ∼ 50°, as the layup angle increases, the blade Tsai_Wu failure factor shows a downward trend. On both sides of about 45°, the change trend of the Tsai_Wu failure factor is different with the increase of ±Xn thickness ratio; the Tsai_Wu failure factor of the blade material is greatly affected by the stacking angle and the thickness ratio of ±Xn.
Research about Wire-like Structure Iron Oxide Anode for Lithium-ion BatteriesZhao, Wenyu
doi: 10.1088/1742-6596/2276/1/012034pmid: N/A
Nano scaled iron oxides have attracted much attention as the anode materials of the lithium-ion batteries, because of its high theoretical capacity, high-capacity retention compared with bulk iron oxides and current commercialized graphite anode. Other benefits including rich abundance, environmental friendliness, low cost and even low toxicity even make it possible to be commercialized. However, problems such as the capacity loss over the first cycle and the capacity retention over the long run are still not satisfying. Thus, this work presents wire-like Fe3O4 core-shell NPs, synthesized by MFI method and high temperature annealing, for using as the anode of lithium-ion batteries. And the wire-like core-shell structure of this material was estimated to have a better electrochemical performance by reducing the aggregation particles and providing a stable nanostructure. In addition to the analysis of the characterization tests, analysis on the electrochemical tests was done in this work, including Cyclic voltammogram and galvanostatic charge and discharge. And the wire-like Fe3O4 core-shell NPs was estimated to show a 1000 mAh g−1 over 100 cycles. Furthermore, future work and challenges from the aspect of synthesizing conditions and further modification of wire-like Fe3O4 core-shell NPs were briefly discussed.
Optimization of micro methanol steam reforming reactorZhu, Ruihan; Zuo, Min; He, Zhenzong
doi: 10.1088/1742-6596/2276/1/012037pmid: N/A
In this paper, a micro reactor integrating hot air heating and methanol steam reforming hydrogen production (MSR) reaction is designed. Firstly, the mechanism of the reactor is studied. The Arrhenius chemical reaction rate evaluation model and simple-c algorithm are applied, the hot air is used to simulate the heat supply of engine exhaust, and the three-dimensional design simulation of the new structure reactor is carried out. The effects of the number of hot air inlet holes, parallel flow, counter flow and inlet schemes on the reactor are investigated. It is found that the conversion of methanol can reach 71.08% with the better inlet scheme of parallel flow in the two-hole condition. Then, taking the comparison of methanol conversion as the index, the correspondence between hot air and electric heating in a certain range is explored. The results of the study have implications for conducting research on the comprehensive utilization of waste heat from engines and the heat reforming for hydrogen production.
Research on defect type diagnosis of composite insulator based on infrared detection technologyLi, Xinran; Huang, Qilin; Zhang, Ruien; Chen, Xiaolin; Geng, Jianghai; Liu, Yunpeng; Zhang, Simin
doi: 10.1088/1742-6596/2276/1/012010pmid: N/A
Composite insulator is widely used in Hainan area of China because of its lightweight, small volume, good anti pollution flashover performance and many other advantages. Aiming at the problem of how to correctly judge the aging state of composite insulators under live conditions in Hainan’s high humidity environment, this paper analyzes the main causes of composite insulator heating and the heating position and temperature rise of composite insulator under different defect types by building equivalent circuit, and puts forward several criteria for distinguishing the defect types of composite insulator by infrared detection technology; taking the abnormal temperature rise of 220kV returned composite insulator in Hainan as an example, the defect type of the composite insulator is analyzed by infrared detection technology, and the correctness of the infrared results is verified by the appearance inspection and anatomical analysis of the test object. The results show that the defect that the temperature rise is between 1-5°C and only appears among the fittings and the first umbrella is caused by the aging, moisture absorption or surface pollution of the umbrella cover; the defect that the temperature rise is above 5°C and the range extends from the high-voltage end sheath to several umbrella skirts is caused by the internal deterioration of the insulator. In conclusion, the conclusion provides a guarantee for the safe operation of power grid and has important reference value for the study of on-line monitoring of composite insulators.
Battery storage systems in electric power grid: A reviewMviri, Franck Soleil Mpio
doi: 10.1088/1742-6596/2276/1/012016pmid: N/A
Renewable energy within the utility grid has increased during the previous decade. Severe issues have been raised about the dependability, effectiveness, and efficiency of energy infrastructure. Therefore, energy storage devices have considerably enhanced the network’s accuracy and reliability. Battery energy storage systems (BESS) are among the greatest widely used storage solutions because they have several advantages over traditional power sources, including fast and accurate response, flexibility, and predictability. They are regarded as a reasonable alternative to the threat of climate change. This paper provides a comprehensive evaluation of the BESS’s optimum size targets, limitations, methodology, benefits and disadvantages. Furthermore, energy storage technologies and improved application targets have been presented and discussed for greater clarity. This study focuses primarily on BESS deployments, methodologies, and environmental impact. BEES innovations and achievements for electrical networks are also compared to other energy storage technologies. Concerns and obstacles are discussed to offer researchers in BESS a comprehensive picture. Finally, this study provides several essential ideas that economists and practitioners can use to design a fruitful, robust, efficient, and resilient BESS for a brighter and more optimal deployment.
Research on Turn-to-Turn Insulation Test of Dry-Type Air-Core ReactorWang, Lulu; Pei, Ying; Wang, Zhijun; Zhao, Yishu; Song, Xinxin; Zhao, Jixiang; Xu, Yuanyuan; Pan, Zhiyuan
doi: 10.1088/1742-6596/2276/1/012029pmid: N/A
The dry-type air-core reactor insulation detection is the key component of reactive power compensation and filter device, which needs to be tested. At present, there are few researches on detection method of dry-type air-core reactor insulation. Based on the principle of pulsed voltage method and reducing test cost, the mathematical model of dry-type air-core reactor is established, the actual parameters are entered for simulation analysis. The simulation results verify the feasibility of using the pulse voltage method to detect the turn insulation between the dry-type air-core reactors, which can guide the actual dry-type air-core reactor insulation detection method.
Study on power grid transient stability control assisted by large-scale energy storageChen, Changqing; Li, Xinran
doi: 10.1088/1742-6596/2276/1/012019pmid: N/A
With the development of energy storage technology, energy storage power station has gradually become one of the main means to solve the voltage instability of the main network caused by uHV DC bipolar phase lock. Therefore, energy storage model has become a difficulty in research. Firstly, the structure model of power storage station participating in power grid voltage transient stability control system is constructed, and the control strategy of power storage station is analyzed. Secondly, in the power system analysis software package (PSASP), the ES model of transient voltage stability control is established by using user-defined modules, and each module in the model is introduced in detail, so as to realize the purpose of enhancing voltage transient stability control of energy storage power station connected to the power grid. Finally, the simulation results show that compared with the adjustable camera, the voltage recovery speed is faster when the same capacity ES is connected in the same place. For example, the voltage recovery speed of 110kV bus decreases from 2.42s to 1.69s, and the recovery speed is increased by 30.17%. And PCS of ES power station has enough short time (<1s) overload capacity, then the ES configuration capacity can be less than the camera capacity.
The technical proposal of energy control system for renewable energy usageZhao, Heng; Liu, Wei; Zhou, Bin; Liu, Zai-wang; Gao, Jia-xin; Wang, Hao-yang; Xie, Chuan-Nan
doi: 10.1088/1742-6596/2276/1/012003pmid: N/A
The industry use of fossil fuels cause global warming and climate change. And, the grid is potentially not reliable source for power supply. Thus, the renewable energy decrease COX and NOX emission. It is suggested that alternative energy resources are encouraged and promoted by the world. That cause, energy control and facilities make reused energy efficiency in industrial region. In conclusion, the technical proposal of innovated and competitive renewable energy is fundamentally concerned rapidly.