Energy Systems Research最新文献

Nonlinear load modeling for analysis of non-sinusoidal conditions in electrical networks based on measurements of harmonic parameters 基于谐波参数测量的电网非正弦状态分析的非线性负荷建模

Energy Systems Research Pub Date : 2021-11-30 DOI: 10.38028/esr.2021.03.0001

L. Kovernikova, V. C. Luong

{"title":"Nonlinear load modeling for analysis of non-sinusoidal conditions in electrical networks based on measurements of harmonic parameters","authors":"L. Kovernikova, V. C. Luong","doi":"10.38028/esr.2021.03.0001","DOIUrl":"https://doi.org/10.38028/esr.2021.03.0001","url":null,"abstract":"Non-sinusoidal conditions in electrical networks need to be calculated for their control and development of technical measures to maintain harmonic parameters according to the requirements of regulatory documents. These calculations are impossible without electrical network and nonlinear load models that adequately reflect them in computational programs. Nonlinear load models have been developed for a long time. Some studies present general modeling principles and models of various nonlinear devices. Others consider some nonlinear devices as equivalent nonlinear loads connected to low and medium voltage networks. A whole host of high-power nonlinear electrical equipment is connected to high voltage networks. Modeling nonlinear loads connected to these networks is a problem. Research of measured parameters of harmonic conditions in electrical networks has shown that they are random values. The probabilistic nature is determined by the network configuration, a range of network components, the number of nonlinear loads, wave and frequency properties of the network, harmonic source phase currents, voltage at terminals of nonlinear electrical equipment, changes in operating conditions and load power, and many other factors. Nonlinear loads can only be modeled based on the measurements of parameters of harmonic conditions due to their unpredictability. The paper presents an overview of existing methods for modeling nonlinear loads, a methodological approach to modeling nonlinear loads based on measured parameters, an algorithm for modeling harmonics of active and reactive currents, a computational program algorithm designed to identify distribution functions of measured current harmonics, and modeling results for current harmonics of railway transformers supplying power to electric locomotives.","PeriodicalId":171218,"journal":{"name":"Energy Systems Research","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129145886","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

Thermodynamic Analysis of Air-Blown Staged Gasification of Coal in a Flow 气流吹煤阶段气化的热力学分析

Energy Systems Research Pub Date : 2021-11-30 DOI: 10.38028/esr.2021.03.0004

D. Svishchev

{"title":"Thermodynamic Analysis of Air-Blown Staged Gasification of Coal in a Flow","authors":"D. Svishchev","doi":"10.38028/esr.2021.03.0004","DOIUrl":"https://doi.org/10.38028/esr.2021.03.0004","url":null,"abstract":"One of the ways to environmentally friendly use coal is an integrated gasification combined cycle. The most common oxidizing agent employed in gasification is oxygen. It is feasible to use air instead of oxygen to reduce the cost of generated electricity. The air gasification downsides can be reduced by using heated air and organizing a staged process. The paper is concerned with a thermodynamic analysis of the MHPS (Mitsubishi Hitachi Power Systems) air-blown staged gasifier. The analysis relies on an original approach that suggests investigating experimental data on a set of calculated ones. The experimental run nears the thermodynamic optimum, which coincides with the carbon boundary line. Cold gas efficiency can be increased from 78.6 to 81.5% by reducing the equivalence ratio. Thus, the temperature will decrease from 1 200 to 1 100 °C. The experimental run of the MHPS gasifier is not optimal thermodynamically, but it is probably optimal kinetically. The fact is that the rates of heterophase reactions decline near the carbon boundary, which leads to a sharp increase in fuel underburning and a decrease in efficiency. The experimental run is also located close to the region with the maximum thermal efficiency of the process, which is indicative of the high efficiency of converting air heat into chemical energy of producer gas.","PeriodicalId":171218,"journal":{"name":"Energy Systems Research","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117265139","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: 1

ACHIEVEMENTS AND CHALLENGES OF SYSTEMS STUDIES ON ENERGY DEVELOPMENT IN RUSSIA, THEIR POSSIBILITIES IN THE "DIGITAL" SOCIETY 俄罗斯能源发展系统研究的成就与挑战及其在“数字”社会中的可能性

Energy Systems Research Pub Date : 2021-11-30 DOI: 10.38028/esr.2021.03.0008

A. Makarov

引用次数: 0

Effect of Grid Faults on Dominant Wind Generators for Electric Power System Integration:A Comparison and Assessment 电网故障对电力系统集成中优势风力发电机组影响的比较与评估

Energy Systems Research Pub Date : 2021-11-30 DOI: 10.38028/esr.2021.03.0007

M. Metwally, M. K. Ratib, M. Aly, A. Abdel-Rahim

引用次数: 8

New Opportunities for the Development of Corporate Governance in Power Generating Companies for the Benefit of Investors 发电公司治理发展的新机遇，造福投资者

Energy Systems Research Pub Date : 2021-11-30 DOI: 10.38028/esr.2021.03.0006

G. Sheveleva

{"title":"New Opportunities for the Development of Corporate Governance in Power Generating Companies for the Benefit of Investors","authors":"G. Sheveleva","doi":"10.38028/esr.2021.03.0006","DOIUrl":"https://doi.org/10.38028/esr.2021.03.0006","url":null,"abstract":"The paper presents an analysis of the central metrics of corporate governance in wholesale and territorial generating companies of the electric power industry that concern ownership structure and compliance of the companies with the principles of the Corporate Governance Code based on their performance results of 2018 - 2019. An increase in ownership concentration and the presence of the state in the competitive segment of the electric power industry is noted. This study has identified the least met criteria for evaluating compliance with the principles of the Corporate Governance Code. The possibilities of developing corporate governance for the benefit of investors are elucidated. These are tightening control over the observance of international \"soft law\" (\"comply or explain\"); expanding the criteria for evaluating compliance with the principles of the Corporate Governance Code that are recommended by the Bank of Russia; updating the Corporate Governance Code based on ESG (Environmental, Social, and Governance) transformation. A new form of oversight over compliance with the Corporate Code principles and criteria for evaluating the adherence to the ESG principles are proposed.","PeriodicalId":171218,"journal":{"name":"Energy Systems Research","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133009221","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

Prospects for the development of geothermal energy supply 地热能供应的发展前景

Energy Systems Research Pub Date : 2021-11-30 DOI: 10.38028/esr.2021.03.0003

V. Stennikov, S. Batmunkh, P. Sokolov

引用次数: 0

Analysis of the electric power potential as illustrated by the UES of Russia 电力潜力的分析，如俄罗斯的UES所示

Energy Systems Research Pub Date : 2021-11-30 DOI: 10.38028/esr.2021.03.0002

V. Trufanov, P. Drachev, V. Khanaev

引用次数: 0

Why IEEE Xplore Matters for Research Trend Analysis in the Energy Sector 为什么IEEE探索能源领域研究趋势分析的重要性

Energy Systems Research Pub Date : 2021-08-09 DOI: 10.20944/preprints202108.0197.v1

B. Chigarev

{"title":"Why IEEE Xplore Matters for Research Trend Analysis in the Energy Sector","authors":"B. Chigarev","doi":"10.20944/preprints202108.0197.v1","DOIUrl":"https://doi.org/10.20944/preprints202108.0197.v1","url":null,"abstract":"The article is aimed at a brief comparison and analysis of the results of queries to IEEE Xplore and the leading abstract databases Scopus and Web of Science to identify research trends. Some errors in the Author Keywords in Web of Science have been revealed. Therefore, a more detailed analysis was conducted by comparing different types of key terms for IEEE Xplore and Scopus platforms only. I used IEEE Access journal metadata as indexed on both platforms. The sample match for IEEE Xplore and Scopus was achieved by comparing DOI. The IEEE Xplore metadata contains more types of key terms, which provides an advantage in analyzing research trends. Using NSPEC Controlled Terms from expert-compiled vocabulary provides a more stable data, which gives an advantage when considering the change of terms over time. Apriori, an algorithm for finding association rules, has been used to compare co-occurrence of terms for a more detailed description of sample subjects on both platforms. VOSviewer was used to analyze trends in scientific research based on IEEE Xplore data. The 2011-2021 ten-year period was divided into two sub-intervals for comparing the occurrence of Author Keywords, IEEE Terms, and NSPEC Controlled Terms. Using the IEEE conference proceedings bibliometric data, I illustrated the importance of context in estimating the rate of growth of publishing activity on a topic of interest.","PeriodicalId":171218,"journal":{"name":"Energy Systems Research","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130453780","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

Review of Clustering Methods for Slow Coherency-Based Generator Grouping 基于慢相干的发电机分组聚类方法综述

Energy Systems Research Pub Date : 2021-07-23 DOI: 10.38028/esr.2021.02.0001

G. Chicco

引用次数: 1

A Methodological Approach to Assessing the Possible Effect of Distributed Generation Expansion on Regional Energy Supply Systems 一种评估分布式发电扩展对区域能源供应系统可能影响的方法学方法

Energy Systems Research Pub Date : 2021-07-22 DOI: 10.38028/esr.2021.02.0006

E. Galperova

{"title":"A Methodological Approach to Assessing the Possible Effect of Distributed Generation Expansion on Regional Energy Supply Systems","authors":"E. Galperova","doi":"10.38028/esr.2021.02.0006","DOIUrl":"https://doi.org/10.38028/esr.2021.02.0006","url":null,"abstract":"One of the new challenges arising from the transition of the energy industry to the path of intelligent development is to assess the effect of distributed generation (DG) on the prospects for the development of regional energy supply systems. Such an assessment requires that the factors characterized by high uncertainty be taken into account. In this case, it is expedient to employ a combination of the optimization method with the Monte Carlo method. Such an approach has already been adopted in a model (computer program) developed at the Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences. This model is designed to determine the rational mix of new power plants (with investment risks assessed and factored in) and the likely cost of electricity generation in a given aggregated region. We propose using this model as a source of projected data for an approximate assessment of the DG expansion, given the projected conditions for the energy sector and electric power industry development. It may also provide the basis for an array of research tools for relevant studies. The new toolkit requires a more detailed representation of the administrative division and the inclusion of consumers with their sources of electric power generation in the generating capacity. Although such an estimate is approximate, it can give an overall idea of the extent to which the cost and demand for electricity may vary under different options for the DG expansion in a region.","PeriodicalId":171218,"journal":{"name":"Energy Systems Research","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126838841","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