System Research in Energy最新文献

{"title":"Esource-saving continuous optical control of liquid metal temperature in metallurgy of energy machine building","authors":"L. Zhukov, D. Petrenko","doi":"10.15407/srenergy2023.03.064","DOIUrl":"https://doi.org/10.15407/srenergy2023.03.064","url":null,"abstract":"The article is devoted to the problem of the most effective and non-alternative continuous optical temperature control of metallurgical aggregates in machine building metallurgy. The aim of the article is to develop and investigate the technologies of continuous temperature control on the base of classical and spectral (multicolor) thermometry. To achieve thе aim, the next methods have been used: analysis of literature sources; experimental investigations of influence regularities of sighting zones, time of tapping, intensity of mixing and liquid metal temperature on one color radiation temperature of liquid metal in visible and infrared spectrum ranges under industrial conditions; statistical processing of the results of direct and indirect measurements with their errors estimation. It has been found the main role of thermometry in the metrological support structure of metallurgical plants. The production volumes of world machine building metallurgy have been analyzed, particularly, the part of metallurgy of energy machine building in it. Metallurgical equipment to be used for liquid metal obtaining and treatment has been classified from thermometric position. The stability of radiation characteristics of liquid metal in cupola, arc and induction furnaces has been investigated under conditions of different impact factors. The methodical errors of optical temperature measurements of liquid metal during tapping from cupola and arc furnaces on the base of classical energy thermometry have been estimated. In special determined сases these errors don’t exceed 1,0–1,5% with confidence level 0,997. Under another conditions these errors reaches 8% and this fact stimulates transition to the spectral thermometry. With the use of modern elemental base, the technologies of spectral measurements of temperature and emissivity have been developed. The technologies include: symmetric-wave, two-color compensative, as well as based on nonlinearity equation of emissivity spectral distribution. The temperature measurement errors of new technologies are lower than the same ones of known spectral, as well as classical energy and spectral ratio thermometry in 2,3; 11,7–20,0 and 6,1–7,6 times. Keywords: metallurgy of machine building, continuous optical temperature control, cupola furnace, arc furnace, classical and spectral thermometry.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125337672","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}

{"title":"Software and information simulation complex of multi-node integrated and autonomous power and heat supply systems","authors":"Viktor Denysov, V. Babak","doi":"10.15407/srenergy2023.03.050","DOIUrl":"https://doi.org/10.15407/srenergy2023.03.050","url":null,"abstract":"A software and information complex for modeling multi-node integrated and autonomous power and heat supply systems is proposed. The main difference of the proposed software and information complex is the possibility of a detailed consideration of the influence of economic and technological parameters contained in the power system of individual power units and nodes. These parameters can be presented both in the form of matrices on the sheets of the software and information complex, and in the form of separate attached files available for automated input by the software and information complex. The main advantages of the complex, which distinguish it from the known ones, include versatility, which makes it possible to study various models of energy systems in a short time. This versatility is ensured by the fact that the complex is developed using a combination of standard Microsoft Excel software and SolverStudio – an add-in for Excel 2007 and later versions on Windows, which allows you to explore a variety of optimization models using a large list of optimization modeling languages. With the SolverStudio add-in in the information package, the user can develop, edit, save, and debug an optimization model in an Excel workbook. The connection of source data, sets, parameters, constants and variables used in the model is conveniently organized. After editing the parameters and source data, the model is launched. Simulation results can be displayed both on model sheets and displayed as separate files. Another advantage of the software and information complex is the ability to conveniently compare many models, due to the fact that each of the worksheets can have its own model. The developed software and information complex makes it possible to calculate in detail the energy, technological and economic indicators of the optimal use of power system components, to determine the permissible limits of the operating parameters of power units of autonomous and integrated power systems. The results of these calculations make it possible to select appropriate measures for the future renewal of technologies for the production of electric and thermal energy. The ease of use and editing of both individual parameters and program texts used in modeling the development of power systems improves the quality of the resulting development scenarios. The proposed software and information complex can be used to study the prospects for short-term and long-term development of Ukraine, as well as the energy system integrated with the power systems of neighboring ENTSO-E member countries, which is relevant in these conditions. Keywords: software, information, complex, multi-node, integrated, autonomous, power, systems.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132124696","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}

{"title":"Enhanced phase method of signal detection for ultrasonic magnetostriction defectoscopy of power equipment","authors":"I. Bohachev, Svitlana Kovtun, Y. Kuts, Stanislav Sozonov, V. Khaidurov","doi":"10.15407/srenergy2023.02.072","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.072","url":null,"abstract":"The magnetostrictive method of ultrasonic flaw detection has certain advantages, in particular, the ability to control objects with complex geometry, at their high temperature, the ability to control dry contact between the transducer and the object, difficult access to the controlled area, etc. The peculiarities of the generation of ultrasonic waves by magnetostrictive transducers and their distribution in control objects determine the low level of the signal/noise ratio, which limits the possibilities of practical application of this method. The aim of the paper is to improve the phase method for detecting signals of magnetostrictive receivers with a low signal/noise ratio and to check the effectiveness of the proposed technical solution for solving problems of non-destructive testing of energy equipment elements using magnetostrictive defectoscopes. The paper discusses the phase method of detecting radio pulse signals of magnetostrictive converters against the background of additive noise, which is based on a combination of the capabilities of the discrete Hilbert transformation, which makes it possible to determine the envelope and phase of signals, and methods of statistical processing of the results of phase measurements. The proposed signal processing algorithm was studied both in a model experiment and when processing real magnetostrictive defectoscope signals. The proposed method makes it possible to detect radio pulse signals with a signal/noise ratio close to 1. The reliability of the obtained data is confirmed by the results of computer simulation. The considered method of detecting signals can be used in ultrasonic magnetostrictive defectoscopes and other diagnostic systems operating in conditions of reduced signal/noise ratio. Keywords: magnetostrictive defectoscope, ultrasonic defectoscopy, phase methods of signal processing, Hilbert transform, envelope, phase, sample resulting length of the vector.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129393854","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}

{"title":"Methodological platform for determining energy efficiency indicators of a complex system","authors":"Tatiana Eutukhova, I. Iliev, O. Novoseltsev, Yevhen Nikitin, Ye. M. Shcherbyna","doi":"10.15407/srenergy2023.02.038","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.038","url":null,"abstract":"The correct determination of the energy efficiency (EE) of a complex system is a problematic task that requires the use of specialized methods and approaches. Most often, EE is considered as an indicator of the quality-of-service provision, which most fully corresponds to the technical and economic essence of this indicator. The structural and functional organization of the system of such indicators is carried out either on a bottom-up approach or a top-down approach, gradually deploying macroeconomic indicators defined at the system levels. This paper considers the tensor form of organization of the system of such indicators, which allows combining within a single model not only their organizational levels (economy as a whole, economic sectors, enterprises, technologies and equipment), but also the types of activities that reflect these indicators (energy, financial, economic, institutional, environmental, social, etc.), and the factors of changes in energy use (structural, technological, resource, managerial, regulatory, etc.). The paper presents the mapping of this model on the plane of structural and functional factors in the form of classification tables (matrices) of these factors (system elements). The paper describes the procedure for optimizing indicators, which can be carried out for each of these factors separately, their aggregate at each level and for the system as a whole, taking into account the need to implement iterative procedures for coordinating the global (system-wide) goal and local objective functions. Given the use of optimization variables measured in energy and monetary units, this problem is formalized within the framework of the set-theoretic approach. For the purpose of comparing the results, the paper examines the relevant provisions of the International Energy Agency methodology, which uses the direct method of three-factor Laspeyres decomposition analysis, and the Sectoral Methodology for Calculating Harmful Emissions of the Ministry for Communities and Territories Development of Ukraine. Keywords: Energy efficiency, energy efficiency indicators, system analysis, tensor approach.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"248 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116576113","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}

{"title":"World experience in legal support for the use of consumers-regulators in power systems","authors":"I. Sokolovska","doi":"10.15407/srenergy2023.02.083","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.083","url":null,"abstract":"The positive experience of using various technologies in power systems as consumers-regulators for energy management is shown, which helps to increase the reliability and stability of power systems, and also reduces the need for new generating capacities, including expensive peak ones. The world experience of legal support for the use of consumers-regulators in power systems at the international, national, and regional levels is considered, namely: directives and regulations of the 4th European EU Energy Package; laws of the USA about independence and national security, energy efficiency improvements, research and development for grid modernization, and the results of the programs developed based on them; laws and regulations of the U.S.A. states and Canada to promote energy savings and reduce greenhouse gas emissions through increased use of renewable energy sources (RES) and other new technologies; the effectiveness of the system of measures DSM (Demand Side Management). In these documents, an important role is assigned to both the use of technologies such as RES, energy storage, Smart Grid, etc., and the possibility to combine consumers of different categories and the rules for their participation in the electricity market in a non-discriminatory way. An increase step by step in support for the use of consumers-regulators in power systems in the legislative and other national documents of Ukraine, in particular, in the new law on the development of energy storage installations, the National Action Plan for Renewable Energy for the period up to 2030, the National Transport Strategy of Ukraine for the period up to 2030, etc., which meet the main provisions of European directives, and it is also shown the need to take into account the wide introduction of new technologies such as Smart Grid, building consumption regulation, the use of electric vehicle charging stations, etc. Keywords: consumers-regulators, legal support, power system.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129086642","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}

{"title":"Aggregated energy supply model according to product energy balance data structure","authors":"M. Kaplin, T. Bilan","doi":"10.15407/srenergy2023.02.048","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.048","url":null,"abstract":"An economic-mathematical model of the production type was developed, intended for forecasting the country's energy supply by calculating the balanced supply of carbon-containing fuels, electricity and heat from fossil fuel and renewable energy sources. The model was built on the basis of open data sources according to the specific structure of technological methods by L.V. Kantorovich, which, unlike the known ones, uses subsystems for the production of abstract products that correspond to the range of outputs and inputs of the product energy balance, and also uses procedures for their selective aggregation to build various forms of inter-product balance matrices. This allowed us to obtain a tool for forecasting and assessing energy balances that is resistant to the growing limitations of information support, which is distinguished by a new system of conditions for a production-type model for the expanded range of the International Energy Agency's product energy balance, as well as a set of technological methods proposed for the first time by L.V. Kantorovich, which together determined the structure of output, costs and product links of individual producers of the energy supply system within the framework of a mutually agreed multi-product balance. The proposed model provides opportunities for using statistical and technological approaches to determining output and cost coefficients in solving forecasting problems, applying inherent means of analyzing retrospective balances to identify unaccounted volumes of FER, as well as volumes of their consumption and transformation in the country's energy sector with significant changes in the structure of electricity and heat generation capacities. The forecasted volumes of supply of the main types of energy resources obtained in the calculations using the developed energy supply model allowed us to assert that, given the indicators of energy efficiency achieved in 2020, the country's energy supply system is able to meet the country's needs mainly through the development of domestic fuel bases. Keywords: energy supply, product energy balance, production type model.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128011544","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}

{"title":"Current state and prospects for development of renewable distributed generation in Ukraine","authors":"G. Kostenko, O. Zgurovets","doi":"10.15407/srenergy2023.02.004","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.004","url":null,"abstract":"The development of distributed generation in Ukraine corresponds to global trends in the energy sector. The particular relevance of distributed energy for Ukraine lies in the fact that its development contributes to reducing the costs of energy consumers, reducing the load on energy networks and losses of electrical energy, as well as improving the reliability of the energy system and energy efficiency of the economy. This article provides an overview of the main sources, technologies, and trends in the development of distributed generation (DG) in Ukraine, including stations running on biofuels (biomass and biogas), small hydroelectric power stations, as well as distributed solar and wind power plants. Various aspects related to the current state and future prospects of distributed energy in Ukraine are considered, with particular attention to barriers that impede its development. The main operating modes of distributed generation facilities are identified together with the National Energy Company of Ukraine. An analysis of the structure of distributed generation facilities by technology and power usage is carried out using statistical data. The factors that stimulate the development of distributed generation technologies are identified, and examples of successful implementation of DG facilities in Ukraine are provided. The main expected effects of implementing DG are determined, such as the adaptation of consumers to the uncertainty of the state of electricity due to the armed aggression of the Russian Federation, increasing the reliability of power supply, partial unloading of both main and distribution power lines, reducing energy losses in networks, as well as providing opportunities for communities to meet their energy needs. In addition, the development of distributed generation can contribute to increasing the level of competition in the electricity market, stimulating the review and optimization of pricing strategies. Keywords: distributed generation, RES, local networks, decentralization of energy supply.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132064285","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}

{"title":"Assessment of the prospectiveness of operating coal mining enterprises","authors":"V. Makarov, M. Perov","doi":"10.15407/srenergy2023.02.018","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.018","url":null,"abstract":"A new methodology for ranking coal mines by the integral coefficient of prospects has been developed. Unlike the known ones, the developed methodology uses a system of volumetric, technological, financial, economic, safety, environmental and social criteria for the functioning of coal industry enterprises that are accessible to the general public. These criteria have been brought to a comparable form. The methodology also takes into account the degree of importance of each criterion in terms of its impact on the technical and economic level of the mine. The system of criteria for the prospects of coal mining enterprises includes the following: installed production capacity of mines, coal production volumes, coal production volumes using new technologies, the cost of coal products, the category of mines by sudden coal and gas emissions, the number of employees and the number of residents of the community where the mine is located, and methane emissions. Mine ratings were calculated to identify unpromising mines that will be considered for further operation or closure. The calculations took into account the WTO requirements for the prospects of coal mining enterprises, as well as the consequences of military operations in Ukraine. The mines were analyzed for two areas of coal product use, namely for energy and coke production. The developed methodology allowed us to form a list of promising coal mining enterprises for steam and coking coal production. The research results provide an opportunity to make managerial decisions on further operation or closure of unpromising coal mining enterprises when developing forecasts of coal fuel supply for thermal power and the country's economy as a whole. The decision on the feasibility of further operation will be made for mines of the lower group. Keywords: coal industry, methodology, ranking, criteria, perspective.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131310449","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}

{"title":"Improving the model of long-term technological update of power system components","authors":"Viktor Denysov, A. Zaporozhets, T. Nechaieva, S. Shulzhenko, V. Derii","doi":"10.15407/srenergy2023.02.030","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.030","url":null,"abstract":"An improved model of mathematical programming is proposed for the study of directions and optimal parameters of the technological renewal of energy system elements operating in energy associations, for the distant perspective and taking into account the perspectives of these elements. The model is a combination and, at the same time, a separate case of two models: a model of a hierarchical controlled quasi-dynamic system and a stochastic quasi-dynamic model of the economic and technological impact of the life cycle of innovative technologies. The main difference of the proposed improved model is the explicit consideration of the influence of economic and technological indicators of the development of the national economy and production, presented in the form of stochastic quasi-dynamic functions. The conducted test calculations confirm the adequacy of the proposed model, the perspective of applying this approach and further development of the model to achieve the necessary levels of detail in the forecast scenarios of the development of energy systems of Ukraine. The performed test calculations made it possible to obtain numerical estimates of the potential that can be achieved by improving the model of long-term technological renewal of power system components. Consideration of the influence of economic and technological indicators of the development of the national economy and production in the form of stochastic quasi-dynamic functions expands the tools and possibilities of obtaining high-quality predictive scenarios of the development of energy systems in Ukraine. The use of efficiency coefficients LCOE, LCOS and LACE, which are widely used in modeling the development of energy systems, increases the quality of the conclusions obtained. Examples of calculations of values of parameters of power system components under different modes of use are given. Keywords: long-term technological renewal of power system components.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128920319","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}

{"title":"Prospective directions for the modernization of control tools load regime in the United energy system of Ukraine","authors":"Ye.A. Lenchevsky, O. Godun","doi":"10.15407/srenergy2023.02.062","DOIUrl":"https://doi.org/10.15407/srenergy2023.02.062","url":null,"abstract":"Considered a promising possibility in the system of dispatching control of the load mode of the United energy system of Ukraine to ensure the processes of regulating the generating capacities of NPP stations. The new direction of construction of control systems using the United energy system of Ukraine mode will make it possible to abandon too expensive means of maneuverable generation, such as the construction of reserve stations with highly maneuverable TPPs that have high-speed start-up characteristics, as well as frequency control support systems using powerful storage batteries. Instead, it is proposed to use powerful automatically controlled electric boilers, previously included in the means of regulating the load regime of the combined energy system. This will contribute to the further development of the generating capacity of nuclear power plants, wind power plants, and thermal power plants, as well as to the resolution of issues related to ensuring the stability and sustainability of the combined power system. Keywords: Unified power system, powerful electric boilers, automated dispatch control system, daily electrical load schedule, main power transmission lines.","PeriodicalId":307644,"journal":{"name":"System Research in Energy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130812579","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}