Renewable Energy and Power Quality Journal最新文献

I-V Characteristics Measuring System for PV Generator based on PDM Inverter 基于PDM逆变器的光伏发电I-V特性测量系统

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.434

A. Sandali, A. Chériti

引用次数: 0

Experimental set-up to study power quality in single-phase split-phase distribution systems 研究单相分相配电系统电能质量的实验装置

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.251

I. Vicente, A. Arrinda, J. E. Rodriguez-Seco, L. Piyasinghe

{"title":"Experimental set-up to study power quality in single-phase split-phase distribution systems","authors":"I. Vicente, A. Arrinda, J. E. Rodriguez-Seco, L. Piyasinghe","doi":"10.24084/repqj21.251","DOIUrl":"https://doi.org/10.24084/repqj21.251","url":null,"abstract":"Power Quality (PQ) has been an important topic since the creation of distribution systems. The deployment of the Advanced Metering Infrastructure (AMI) provided an important tool to measure the PQ of the electric power in the consumption points. One of the smallest secondary distribution systems in terms of power consumption is the single-phase split-phase system (120 V/240 V) that countries such as the United States, Canada, and some countries of central and south America have. Due to its size, this secondary distribution system is more prone to PQ issues. To that end, an experimental set-up was built by the authors so the distribution system from the Low Voltage (LV) transformer to the final appliances of the different houses was emulated. The aim is to capture the currents and voltages observed by the smart meter located at the entrance of the house and look for the different responses. A combination of real and dummy loads was installed in the set-up, so real noise could also be simulated. The set-up was totally automated by an industrial controller and relays, and it produced a very detailed dataset that could be used for multiple purposes.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72395317","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

Cosine Windows in Interpolated DFT-based Method for an Accurate High-Frequency Distortion Assessment in Power Systems 基于余弦窗插值dft的电力系统高频失真准确评估方法

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.312

A. Bracale, P. Caramia, G. Carpinelli, P. De Falco, P. Verde

{"title":"Cosine Windows in Interpolated DFT-based Method for an Accurate High-Frequency Distortion Assessment in Power Systems","authors":"A. Bracale, P. Caramia, G. Carpinelli, P. De Falco, P. Verde","doi":"10.24084/repqj21.312","DOIUrl":"https://doi.org/10.24084/repqj21.312","url":null,"abstract":"The transformation of electrical networks in the context of the new smart grid paradigm unavoidably involves new challenges regarding Power Quality (PQ) disturbances not only for customers but also for all the other involved stakeholders. Among PQ disturbances, waveform distortions have recently gained growing interest due to the massive presence of new technologies in distributed energy resources, in modern loads and in advanced smart metering systems. The presence of these devices determines arduous electromagnetic compatibility problems since the current and voltage waveform distortions in smart grids are characterized by spectral components above the traditional 2 kHz frequency limit, in a range extended up to 150 kHz. In this paper, an interpolated DFT-based (IDFT) method, recently proposed in the relevant literature in the field of signal processing, is properly extended for an accurate and fast assessment of power system waveform distortions in the frequency range from 2 to 150 kHz. Since DFT-based methods can suffer well-known spectral leakage problems, in this paper the IDFT is applied using cosine windows that minimize interference conditions among spectral components and maximise the estimation accuracy of the spectral component amplitude, phase angle and frequency. An optimal number of cosine window terms is also searched to improve the spectral analysis of high-frequency power system waveforms. Numerical applications on synthetic test signals and measured waveforms are carried out to quantify the accuracy and computational efforts of the proposed approach and to select the cosine window terms that better optimize the waveform distortion assessment.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72531032","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

Analysis of current barriers and solutions in the implementation of energy efficiency methods in the European industry 分析目前的障碍和解决方案，在欧洲工业的能源效率方法的实施

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.375

L. Molina Cañamero, E. Peñalvo-López, I. Valencia-Salazar, V. León-Martínez

引用次数: 0

State of the art of the optimisation of the selection and use of renewable energies for the agricultural environment 为农业环境优化选择和使用可再生能源的最新技术

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.335

A. León-Vinet, E. Peñalvo-López, I. Valencia-Salazar, Cárcel-Carrasco

引用次数: 0

Analysis of market entry, restructuring and economic risks at energy companies – literature review 能源企业的市场进入、重组与经济风险分析——文献综述

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.291

I. Vokony, M. Csete Szalmáné

{"title":"Analysis of market entry, restructuring and economic risks at energy companies – literature review","authors":"I. Vokony, M. Csete Szalmáné","doi":"10.24084/repqj21.291","DOIUrl":"https://doi.org/10.24084/repqj21.291","url":null,"abstract":"The entry of companies dealing with renewable energy sources into the market will be analyzed firstly, in addition to the companies dealing with fossil-based energy production, which are still strongly present. Here the game-theoretic stylization of the competition between two types of companies is in scope, while the incumbents determine the energy prices, and those entering the market can respond with quantitative adjustments. After that, the cyber security issues of the market-leading energy companies are under revision. Nowadays, due to the widespread use of computer control systems, a possible cyber-attack is a big risk for a power plant, as it can result in a complete system shutdown or, in the worst case, even irreparable damage. In light of these, risk networks are analyzed in three layers, reflecting normal and extreme market conditions. Ultimately, we will analyze the strategic steps of companies' restructuring and withdrawal. In the current economic situation, many dominant companies have a diversified portfolio, which on one hand promises beneficial profit opportunities and financial stability due to the parallel presence of diverse investment and production directions, but also makes it necessary to abandon the given route and to reallocate resources to another sector if necessary. Based on these points, by the end of the analysis, we will have a clearer picture of the struggle for market dominance of large energy companies and the steps necessary for success.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77986868","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

Real-time Simulation Framework for Validating Controllers of Virtual Synchronous Generators 虚拟同步发电机控制器验证的实时仿真框架

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.299

M. Chowdhury, L. Strayóczky, Z. Sütő

引用次数: 0

A path planning approach for unmanned solar-powered aerial vehicles 一种无人太阳能飞行器路径规划方法

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.240

A. Ailon

{"title":"A path planning approach for unmanned solar-powered aerial vehicles","authors":"A. Ailon","doi":"10.24084/repqj21.240","DOIUrl":"https://doi.org/10.24084/repqj21.240","url":null,"abstract":"Solar energy is an available high-quality source for the operation of many technological systems that fulfil the needs of human society. Among all the many applications, the use of solar energy in aircraft is extremely challenging, with a lot of potential advantages. The application of solar energy for flight is one of the promising uses of renewable energy, and in particular the possibility of improving the long endurance requirement in complex missions of unmanned aerial vehicles (UAVs) using solar energy is very attractive. In this context, the article deals with the problem of flight path planning in solar-powered UAVs that fly at a constant altitude. The UAV model incorporates kinematic and dynamic equations where the components of the input vector are the thrust force and the bank angle. Planning the flight path relies here on the flatness property of the system. In fact, his property allows us to plan a flight path without solving non-linear differential equations, and most importantly to link the dynamics of the system, the energy lost and the solar energy absorbed during the flight. Some relevant applications of the approach are discussed, and numerical results are demonstrated. Key words. Solar energy, UAV control, kinematic & dynamic equations, path planning, differentially flat system.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88377442","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

Free Simulation Tools for Power Quality and Grid-Integration of Renewable Energies Cases 电能质量和可再生能源并网案例的免费仿真工具

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.458

M. Mañana, A. Arroyo, R. Martínez, S. Bustamante, A. Laso, E. Sainz

{"title":"Free Simulation Tools for Power Quality and Grid-Integration of Renewable Energies Cases","authors":"M. Mañana, A. Arroyo, R. Martínez, S. Bustamante, A. Laso, E. Sainz","doi":"10.24084/repqj21.458","DOIUrl":"https://doi.org/10.24084/repqj21.458","url":null,"abstract":"The analysis of Power Quality issues and/or the integration of renewable energy into the grid requires the use of different tools, among which the use of computer simulation applications stands out. The basic objective is to obtain a model of the electrical system under study that allows for knowledge, with a reasonable degree of precision, of its behavior under different operating conditions. The benefits of these tools are manifold, since they allow us to understand the response of the system, both in transient and steady-state conditions, to situations that are difficult to reproduce in practice: short circuits, failures in generation, transmission and distribution infrastructures, etc. Additionally, these tools can be used as platforms for operator training and network planning. Currently, a wide variety of commercial tools that are de facto standards can be found on the market. Some of these tools have a high cost and cannot be used by students outside the academic environment. In parallel, and thanks to the efforts of the scientific community, simulation tools have been developed that are available free of cost under several licensing models. This contribution analyzes some of the available tools, with special attention to those that are published under several open source and academic non-commercial software licenses that are available to the academic community free of cost.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82652509","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

Modeling of a stand-alone solar photovoltaic water pumping system for irrigation 独立太阳能光伏灌溉抽水系统的建模

Renewable Energy and Power Quality Journal Pub Date : 2023-07-01 DOI: 10.24084/repqj21.443

J. S. Artal-Sevil, V. Ballestín-Bernad, J. Lujano-Rojas, R. Dufo-López, J. Bernal-Agustín

{"title":"Modeling of a stand-alone solar photovoltaic water pumping system for irrigation","authors":"J. S. Artal-Sevil, V. Ballestín-Bernad, J. Lujano-Rojas, R. Dufo-López, J. Bernal-Agustín","doi":"10.24084/repqj21.443","DOIUrl":"https://doi.org/10.24084/repqj21.443","url":null,"abstract":"Solar photovoltaic water pumping systems have been research topics in recent decades. The purpose was to develop much more profitable and efficient systems to meet the needs of pumping water for livestock and irrigation. This paper describes the design of a stand-alone photovoltaic water pumping system. A Boost converter is used to apply the Maximum Power Point Tracking (MPPT) algorithm. Similarly, a three-phase voltage source converter (VSC) is used to supply the asynchronous motor. The installation must provide a continuous water flow during the irrigation interval. It has been verified that in adverse weather conditions (cloud transits or partly cloudy) it is necessary to incorporate a decentralized-hybrid energy storage system (based on batteries or ultracapacitors), or excessively oversize the standalone photovoltaic system, to supply the water pump. The model has been simulated in Matlab-Simulink. In this way, different simulations have been developed to verify the basic characteristics of the proposed system. The results of the simulated model and the conclusions obtained are also presented in this paper.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88088960","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