Archives of Electrical Engineering最新文献_第8页

Robust microgrids for distribution systems with high solar photovoltaic penetration 高太阳能光伏渗透率配电系统的鲁棒微电网

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146050

{"title":"Robust microgrids for distribution systems with high solar photovoltaic penetration","authors":"","doi":"10.24425/aee.2023.146050","DOIUrl":"https://doi.org/10.24425/aee.2023.146050","url":null,"abstract":": A microgrid is an appropriate concept for urban areas with high penetration of renewable power generation, which improves the reliability and eﬃciency of the distribution network at the consumer premises to meet various loads such as domestic, industrial, and agricultural types. Microgrids comprising inverter-based and synchronous generator-based distribution generators can lead to the instability of the system during the islanded mode of operation. This paper presents a study on designing stable microgrids to facilitate higher penetration of solar power generation into a distribution network. A generalized small signal model is derived for a microgrid with static loads, dynamic loads, energy storages, solar photovoltaic (PV) systems, and diesel generators, incorporating the features of dynamic systems. The model is validated by comparing the transient curves given by the model and a transient simulator subjected to step changes. The result shows that full dynamic models of complex systems of microgrids can be built accurately, and the proposed microgrid is stable for all the considered loading situations and solar PV penetration levels according to the small signal stability analysis.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135774875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photovoltaic power prediction based on improved grey wolf algorithm optimized back propagation 基于改进灰狼算法优化反向传播的光伏发电预测

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146040

{"title":"Photovoltaic power prediction based on improved grey wolf algorithm optimized back propagation","authors":"","doi":"10.24425/aee.2023.146040","DOIUrl":"https://doi.org/10.24425/aee.2023.146040","url":null,"abstract":": At present, the back-propagation (BP) network algorithm widely used in the short-term output prediction of photovoltaic power stations has the disadvantage of ignoring meteorological factors and weather conditions in the input. The existing traditional BP prediction model lacks a variety of numerical optimization algorithms, such that the prediction error is large. The back-propagation (BP) neural network is easy to fall into local optimization thus reducing the prediction accuracy in photovoltaic power prediction. In order to solve this problem, an improved grey wolf optimization (GWO) algorithm is proposed to optimize the photovoltaic power prediction model of the BP neural network. So, an improved grey wolf optimization algorithm optimized BP neural network for a photovoltaic (PV) power prediction model is proposed. Dynamic weight strategy, tent mapping and particle swarm optimization (PSO) are introduced in the standard grey wolf optimization (GWO) to construct the PSO–GWO model. The relative error of the PSO–GWO–BP model predicted data is less than that of the BP model predicted data. The average relative error of PSO–GWO–BP and GWO–BP models is smaller, the average relative error of PSO–GWO–BP model is the smallest, and the prediction stability of the PSO–GWO–BP model is the best. The model stability and prediction accuracy of PSO–GWO–BP are better than those of GWO–BP and BP","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135774878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling of Li-Ion battery state-of-health with Gaussian processes 锂离子电池健康状态的高斯过程建模

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146042

引用次数: 0

Investigation of local properties of the Fe-Si alloy subjected to mechanical and laser cutting 机械和激光切割Fe-Si合金局部性能的研究

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146045

{"title":"Investigation of local properties of the Fe-Si alloy subjected to mechanical and laser cutting","authors":"","doi":"10.24425/aee.2023.146045","DOIUrl":"https://doi.org/10.24425/aee.2023.146045","url":null,"abstract":": The eﬀective design of energy-saving electric motors with eﬃciency class IE4 and higher requires the use of material characteristics that take into account the core shaping process. Therefore, it becomes necessary to use analytical or numerical models that take into account the change of local properties of Fe-Si material. The aim of the work is to indicate a useful analytical model for estimating the local magnetic permeability of the material, as well as to understand the reasons for these changes. For this purpose, low-loss ferromagnetic materials cut with a guillotine and a laser were tested. Rectangular samples, cut at an angle of 0 degrees in relation to the rolling direction, were subjected to macroscopic and microscopic examinations. Finally, the main reasons for changes in material characteristics for both cutting technologies were indicated. Therefore, the proposed model takes into account not only the cutting technology used, but also the current width of the tested strip, for which the material characteristics are to be determined. The parameters of the analytical model are determined on the basis of a limited number of measurements carried out on samples of a simple geometric shape.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135774885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-domain analytical rotor model with buried permanent magnets in V-arrangement for high-speed applications 高速v形埋置永磁体转子多域解析模型

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146041

引用次数: 0

Research on improving low-frequency oscillation characteristics of wind power grid-connected power system with doubly-fed wind generator based on virtual impedance power system stabilizer 基于虚拟阻抗电力系统稳定器改善双馈风电并网系统低频振荡特性的研究

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146051

{"title":"Research on improving low-frequency oscillation characteristics of wind power grid-connected power system with doubly-fed wind generator based on virtual impedance power system stabilizer","authors":"","doi":"10.24425/aee.2023.146051","DOIUrl":"https://doi.org/10.24425/aee.2023.146051","url":null,"abstract":": The grid integration of large-scale wind power will alter the dynamic characteristics of the original system and the power distribution among synchronous machines. Meanwhile, the interaction between wind turbines and synchronous machines will aﬀect the damping oscillation characteristics of the system. The additional damping control of traditional synchronous generators provides an important means for wind turbines to enhance the damping characteristics of the system. To improve the low frequency oscillation characteristics of wind power grid-connected power systems, this paper adds a parallel virtual impedance link to the traditional damping controller and designs a DFIG-PSS-VI controller. In the designed controller, the turbine active power diﬀerence is chosen as the input signal based on residual analysis, and the output signal is fed back to the reactive power control loop to obtain the rotor voltage quadrature component. With DigSILENT/PowerFactory, the inﬂuence of the controller parameters is analyzed. In addition, based on diﬀerent tie-line transmission powers, the impact of the controller on the low-frequency oscillation characteristics of the power system is examined through utilizing the characteristic root and time domain simulation analysis.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135774884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Economic dispatch in power system networks including renewable energy resources using various optimization techniques 利用各种优化技术实现含可再生能源的电网经济调度

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2021.137579

{"title":"Economic dispatch in power system networks including renewable energy resources using various optimization techniques","authors":"","doi":"10.24425/aee.2021.137579","DOIUrl":"https://doi.org/10.24425/aee.2021.137579","url":null,"abstract":": Economic dispatch (ED) is an essential part of any power system network. ED is howtoscheduletherealpoweroutputsfromtheavailablegeneratorstogettheminimumcost while satisfying all constraints of the network. Moreover, it may be explained as allocating generation among the committed units with the most eﬀective minimum way in accordance with all constraints of the system. There are many traditional methods for solving ED, e.g., Newton-Raphson method Lambda-Iterative technique, Gaussian-Seidel method, etc. All these traditional methods need the generators’ incremental fuel cost curves to be increasing linearly. But practically the input-output characteristics of a generator are highly non-linear. This causes a challenging non-convex optimization problem. Recent techniques like genetic algorithms, artiﬁcial intelligence, dynamic programming and particle swarm optimization solve nonconvex optimization problems in a powerful way and obtain a rapid and near global optimum solution. In addition, renewable energy resources as wind and solar are a promising option due to the environmental concerns as the fossil fuels reserves are being consumed and fuel price increases rapidly and emissions are getting higher. Therefore, the world tends to replace the old power stations into renewable ones or hybrid stations. In this paper, it is attempted to enhance the operation of electrical power system networks via economic dispatch. An ED problem is solved using various techniques, e.g., Particle Swarm Optimization (PSO) technique and Sine-Cosine Algorithm (SCA). Afterwards, the results are compared. Moreover, case studies are executed using a photovoltaic-based distributed generator with constant penetration level on the IEEE 14 bus system and results are observed. All the analyses are performed on MATLAB software.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135774860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of winding and shaft cooling on the thermal characteristics of a traction machine for heavy-duty distribution transport 卷绕和轴冷却对重型分配输送牵引机热特性的影响

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146049

引用次数: 0

Study of an open-switch fault detection algorithm for a three-phase interleaved DC–DC boost converter in a photovoltaic system 光伏系统三相交错DC-DC升压变换器开路故障检测算法研究

Archives of Electrical Engineering Pub Date : 2023-11-03 DOI: 10.24425/aee.2023.146043

引用次数: 0

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Archives of Electrical Engineering Pub Date : 2023-09-08 DOI: 10.24425/aee.2023.147415

引用次数: 0