Lighting engineering and power engineering最新文献

{"title":"Development and simulation of the Institute of ionosphere measuring complex energy consumption","authors":"A. Gapon, O. Grib, S. Kozlov, O. Yevseienko, O. Levon","doi":"10.33042/2079-424x-2020-2-58-28-32","DOIUrl":"https://doi.org/10.33042/2079-424x-2020-2-58-28-32","url":null,"abstract":"The work is devoted to solving an urgent problem - the development of a computer model of the energy consumption system of the Institute of the ionosphere of the National Academy of Sciences and the Ministry of Education and Science of Ukraine in order to solve the problem of increasing the energy efficiency of the measuring complex. The power supply system of the complex is described, a generalized structural diagram of the loads - powerful consumers of electricity is presented. The graphs characterizing the energy consumption of individual powerful loads are presented, the problem of compensating the reactive power of loads is shown. The adequacy of the developed model is confirmed by the coincidence of the shape and values of the experimentally obtained characteristics on loads with the characteristics of the model. The model adequacy was assessed by the variance of feedback deviations from the system mean. The results obtained confirmed the possibility of using the developed Matlab-model of the energy consumption system of the measuring complex for creating and testing on the model of an energy-efficient power supply system, which will ensure the stable operation of scientific equipment for the implementation of research programs of the NAS of Ukraine.","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125194318","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":"Increasing the parameters of electrical distribution networks of town districts with low load density","authors":"V. Perepecheny","doi":"10.33042/2079-424x-2020-1-57-28-32","DOIUrl":"https://doi.org/10.33042/2079-424x-2020-1-57-28-32","url":null,"abstract":"This article presents the results of research on the parameters of electrical networks with a voltage of 6 (10) and 0.38 kV in relation to capital investments. The analysis of existing methods of estimation of parameters before designing for power supply networks in a small town with low load density is carried out. In modern conditions, in the distribution of electrical networks is of paramount importance the introduction of energy-saving schemes and parameters of power supply systems. One of the main ways to implement them is to increase the efficiency of 6-10 / 0.38 kV networks. In the actual design of electrical networks, economic proportionality can not always be maintained for various reasons: the impact of technical constraints, the discreteness of the rated power of transformers and cable crossing scales, a significant deviation of individual capacities of consumers from the average value. In that case there is an increase in the reduced costs. A methodology for determining the optimal power of transformer substations and optimal\u0000sections of 0.38 kV power transmission lines is proposed, taking into account the probable nature of the applied load. When assembling the power supply circuit for the optimal form of parameters, voltage, principles of voltage regulation and reactive power compensation. Decisions of this kind are substantiated by technical and economic comparisons of a series of technically acceptable variants of power supply networks. An important measure that facilitates the selection of the most economical option is the assessment of the proposed project, which relates to the selection of the optimal capacity of transformer substation (TS) networks using calculation formulas. The aim of the research was to improve the existing methods on the basis of separate accounting of the reliability coefficient of 0.38 kV and 6-10 kV network. Key words - electric power supply network, network parameters, transformer substation, load density, line wire section, specific load, unit costs, optimum parameter, distribution networks, electric energy.","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129988034","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":"Space of visual and circadian parameters of RGBW lighting systems","authors":"D. Kalustova, V. Kornaga, A. Rybalochka, S. Valyukh","doi":"10.33042/2079-424x-2020-1-57-16-21","DOIUrl":"https://doi.org/10.33042/2079-424x-2020-1-57-16-21","url":null,"abstract":"Due to the proven effect of light on human\u0000circadian rhythms, nowadays researchers and developers of\u0000lighting systems (LS) concentrate on the non-visual\u0000parameters of light and methods of ensuring a safe\u0000comfortable light environment. This requires optimisation of\u0000spectral power distribution (SPD). In this view the most\u0000promising and functional are RGBW systems due to their\u0000ability to change dynamically SPD and, hence, light\u0000parameters. In this work we explore two RGBW (red-greenblue-white) systems with different white LEDs (warm white\u0000and neutral white) and the space of visual and non-visual\u0000parameters that they can ensure. Visual parameters are\u0000studied in terms of colour rendering index, colour fidelity\u0000index and visual corneal illuminance while non-visual\u0000parameters are studied in terms of circadian light, circadian\u0000stimulus and circadian action factor. These parameters are\u0000calculated for different contribution of the components in a\u0000correlated colour temperature (CCT) range of 2500 – 7000K.\u0000In addition, acceptable criterion of the colour fidelity index\u0000above 85 is used. It is shown that under this condition the\u0000circadian action factor in the range of 0.33-0.98 can be\u0000obtained by changing the CCT and (or) colour fidelity index.\u0000Also an achievable area of the circadian stimulus versus\u0000corneal illuminance space for RGBW systems is found. It\u0000enables to choose optimal combination of CCT, circadian\u0000stimulus and corneal illuminance to provide the desired level\u0000of circadian effect with sufficient visual comfort depending\u0000on the daytime and field of system's implementation. This\u0000data is useful for LS manufacturers and lighting designers to\u0000create a comfortable lighting environment.\u0000Keywords - RGBW colour mixing, tunable white light,\u0000circadian effect, colour rendering, colour fidelity index.","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115481018","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":"Ranking of energy consumption objects using the principal components method","authors":"A. Perekrest, V. Ogar, О. Vovna, M. Kushch-Zhyrko","doi":"10.33042/2079-424x-2020-1-57-39-44","DOIUrl":"https://doi.org/10.33042/2079-424x-2020-1-57-39-44","url":null,"abstract":"Ensuring comfortable conditions in civil buildings requires the implementation of tasks of monitoring and forecasting the cost of energy resources, as well as energy-efficient management of heating engineering systems and its equipment. The implementation of appropriate automation and monitoring solutions allows the accumulation of a significant amount of data. To increase the informativeness of the analysis of energy efficiency in the operation of civil buildings a model of their information ranking was developed using correlation analysis and the principal component analysis. Based on the interdisciplinary methodology of data analysis (CRISP-DM), the basic indicators were determined for the accepted initial conditions on electricity and heat consumption of the university buildings and the matrix of correlation coefficients of their interrelation was estimated. Certain data (external volume and area of the building and average temperature values for this region according to the norm) are obtained from the technical documentation of buildings and available from open sources, others (amount of consumed heat and electricity, indoor temperature) are determined during operation and characterize the efficiency of energy resources in the building. At the initial stage, a correlation analysis of the relationship between the main parameters that\u0000characterize buildings and their consumption of energy resources. The principal component analysis was used to reduce the dimensionality of the feature set of data and to identify homogeneous groups of energy consumption objects. The obtained four components explain about 90% of the variance of the initial data and characterize the efficiency of energy use in terms of temperature, volume and coefficient of heating degree days of the heating season. The obtained results are recommended for implementation in modern systems of energy monitoring and municipal energy management as applied models for diagnosing abnormal situations and sound management decisions.\u0000Keywords – buildings; energy consumption; principal components; machine learning; data segmentation.","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123585243","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":"The technique of calculating the profile of a mirror reflector for discharge lamps of cylindrical shape and its testing on the example of design of an\u0000industrial lamp type ZhSP-250","authors":"Y. Lobanov, G. Petchenko","doi":"10.33042/2079-424x-2020-1-57-22-27","DOIUrl":"https://doi.org/10.33042/2079-424x-2020-1-57-22-27","url":null,"abstract":"Current scientific trends are developments - methodological, theoretical and experimental, related to increasing the efficiency of some categories of lamps with discharge lamps. One such category is the powerful industrial spotlight class luminaires. This work is aimed at solving the\u0000urgent scientific task of finding ways to improve the design efficiency of industrial luminaires with deep and concentrated light distribution. At present, there are practically no works related to the task of calculating the geometry of the profiles of mirrored round-symmetric reflectors, which, in the presence of a light source of a fixed type and power, would provide the necessary light distribution of the luminaires. The elemental reflection method described in classical works does not determine the geometry of the reflector correctly, which provides the necessary balance in the equation that relates the light power of the lamp to the light power of the source and the reflector. The considerable time of calculation by the classical method and obtaining inaccurate decisions leads to rethinking the solution of the problem of calculating the geometry of the the reflector profile of the lamp with rigidly regulated light distribution. This task was first formulated by us in previous works. The purpose of this work is to approve the technique of solving the inverse problem of determining the geometry of a round-symmetric mirror reflector on the example of an industrial lamp type ZhKU-250 with light distribution type G-2. As the output of the calculation we used the light source and technical characteristics of the light source - DNAT-250 lamps, the required light distribution of the light fixture, the reflectance of the reflector, and the requirements for the efficiency of the designed luminaire and its gain. As a result of the performed work, it is possible to note the efficiency of the method both in terms of the accuracy of the calculations and the simple geometry of the reflector, obtained in the calculation method, which will allow to use simplified technological schemes for the serial production of such lamps. \u0000Keywords - industrial luminaires, DNaT discharge lamps, reflector LPC (Light Power Curve) required, zone LPCs of the reflector, radius vector array, luminaire gain and efficiency, elemental reflection method, reflector profile, rotary extrusion method.","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124309928","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":"The technology of a condition based maintenance of an overhead contact line with Markov approximation of contact wire wear","authors":"K. Pereverzyev, V. Vasenko, G. Domanska","doi":"10.33042/2079-424x-2020-1-57-3-8","DOIUrl":"https://doi.org/10.33042/2079-424x-2020-1-57-3-8","url":null,"abstract":"The technologies of OCL condition based maintenance were improved for providing reliable and economic current collecting on electrified railways and in traction power networks of urban electric transport. It is established that one of the most perspective methods of reducing operating costs is the transition to scientifically justified terms of repair and planning of works\u0000based on the actual state of OCL, the reliability of which is determined by the reliability, repair suitability and durability of the\u0000elements. The basic criteria of the current collecting process are proposed: the value of contacting pair wear, the detachment of\u0000the current collectors from the wires, the scope of oscillations of pantograph head and the contact pressure, coefficients of contact unreliability and cost savings of collecting a power from catenary, and, finally, a minimum of annual operating costs.\u0000Technology of maintenance according to Markov type parameter control is developed. Models of controlling actions on\u0000stagger and the contact wire gradient adjustment processes are developed. The standard linear programming algorithm was\u0000used to solve the problem. The application of such technology to determine the matrix of controlling actions based on the results\u0000of monitoring the stagger and the contact wire gradient is shown. The factors that determine the cost of staying in a state of\u0000stagger have been identified. The controlling actions matrices on the stagger and the contact wire gradient and the cost of staying in these gradient states are established.\u0000The technology of service with Markov approximation of wear of contact wires is offered. It has been investigated that the\u0000contact wires, primarily due to wear, are degraded during operation. Degradation processes cause gradual failures. The first\u0000group of failures: breakages, burnouts, local wear - require controlling actions to incut the insertion or putting into operation a\u0000shunt. The second group: a burnout, a decrease in the average cross-section of a wire less than the allowable one requires controlling actions to replace the wire of the entire tension length. After conducting the first type of controlling actions, the contact\u0000wire returns to the working state with the previous value of the determining parameter. When performing a second type of\u0000controlling actions, the defining parameter returns to its original state. If the quantification step is chosen such that the intensities of failures and transitions from one state to another with a sufficient degree of accuracy were constant, then the graph of\u0000states and transitions, as well as the Kolmogorov differential equations, can be used for the research. The readiness function,\u0000the density of time distribution of infallible operation, the total failure rate, and the average recovery rate from state S0i to Si\u0000are determined. Thus, all reliability indicators are defined and it is possible to use them in determining the condition of the contact wire of the tension","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116449733","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":"Principles of constructing, calculation methods of direct current hybrid contactors for alternative energy","authors":"A. Soskov, Y. Forkun, S. Kotelevets","doi":"10.33042/2079-424x-2019-1-54-18-29","DOIUrl":"https://doi.org/10.33042/2079-424x-2019-1-54-18-29","url":null,"abstract":"It is shown that the principle of control and voltage supply of the hybrid DC contactor network is realized by connecting the electronic circuit with one terminal between two counter-actuated power-operated semiconductor devices of the two-way key, which shunts the main contacts of the first pole of the contactor, and the second terminal Luce. As a result, the network voltage is fed to the electronic circuit only for a short period of time (several ms), which is determined by the value of the time flow of the load current through the shunted bidirectional NC under the disconnected load. The features of the process of current flowing from the main contacts to the circuits of switching on and off power controlled devices and the charge of the switching capacitor are determined. It was found that in order to ensure reliable switching in the entire range of switching currents of the contactor, it is necessary that the parameters of the elements of the switching circuit and the charge circuit of the switching capacitor were selected on the condition that the current in the switching circuit of the power NC at the moment of its switching was equal to the current in the charge circuit of the switching capacitor. In this case, the value of this current should not be less than the maximum switching-off current of a fully controlled NC. This makes it possible to reasonably approach the determination of the parameters of the elements, which ensure the secure locking of the two-directional NC. As a result of the studies, it was also shown that the proposed hybrid contactors due to the introduction of voltage control of the network compared to the existing ones have competitiveness enhancing properties. In particular, they increase the reliability of the work, they do not need to supply an additional source of power, they exclude standard drivers, minimize energy consumption. Thus, an exemplary aspect of using the scientific result obtained is the ability to create competitive on-line hybrid DC contactors with a voltage up to 1000 V and currents of 100 ÷ 600 A for alternative energy. Key wordhybrid contactor, main contact elements, two directional semiconductor key, voltage control","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115648355","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":"Mathematical Modeling of Photovoltaic Module with Simulink","authors":"H. Abugoukh","doi":"10.33042/2079-424x-2019-1-54-47-54","DOIUrl":"https://doi.org/10.33042/2079-424x-2019-1-54-47-54","url":null,"abstract":"Annotation – Solar Energy is a good choice for electric power generation, since the solar energy is directly converted into electrical energy by solar photovoltaic modules Solar cells generates most of their electricity from direct sunlight. However, they also generate electricity on cloudy days and some systems can even generate very small amounts of electricity on bright moonlit nights. Individual solar cells typically only generate tiny amounts of electrical energy. To make useful amounts of electricity, these cells are connected together to make a solar module, otherwise known as a solar panel or, to be more precise, a photovoltaic module.The PV model plays an important role in the accuracy of the time simulation of the PV cell model. Modeling of PV cell involves the estimation of the I–V and P–V characteristics curves to emulate the real cell under various environmental conditions Photovoltaic (PV) model is used in a simulation study to validate the system design of a PV system. This paper presents modeling of Photovoltaic (PV) module using MATLAB/SIMULINK. The model is developed on the basis of mathematical model of the PV module. The PV module of SN72-CELL-POLY CRYSTALLINE PV MODULE SN325P is selected for the experimental and technical data to analyze the developed model. The output current and power characteristic curves highly depend on some climatic factors such as solar radiation and temperature, are obtained by simulation for the selected module with the output power of 325 W .The objective of this paper is to develop a model to simulate the behavior of a photovoltaic cell. The achieved Voc voltage and current values from I-V and P-V characteristics are compared with module data sheet both models are implemented in MATLAB /SIMULINK. The “five-parameter model” is a performance model for photovoltaic solar cells that predicts the voltage and current output by representing the cells as an equivalent electrical circuit with radiation and temperature-dependent components. An important feature of the five-parameter model is that its parameters can be determined using data commonly provided by module manufacturers on their published datasheets..","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115492694","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 efficiency of managing the modes of distributive networks by automated monitoring the parameters of the mode and the environment in real time","authors":"N. Cheremisin, O. Savchenko, S. Diubko, O. Iegorov","doi":"10.33042/2079-424x-2019-1-54-3-8","DOIUrl":"https://doi.org/10.33042/2079-424x-2019-1-54-3-8","url":null,"abstract":"Annotation The article deals with monitoring of power lines in areas with intensive ice deposition. It emphasizes the need to apply environmental parameters that significantly affect the short-term forecast of electricity consumption, energy losses in power grid elements, frostbite on power lines and their forecasting, outlines the main tasks that are solved by an automated monitoring system. It is proposed to improve the existing monitoring systems for power lines by adding meteorological parameters to the system. It is shown that monitoring of power lines, taking into account real-time monitoring of meteorological data, will allow to increase the efficiency of management of the modes of operation of electric networks","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122186517","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":"Analisis of the results obtained by the method of amplitudeindependent internal friction on metals and ionic crystals","authors":"O. Petchenko, G. Petchenko","doi":"10.33042/2079-424x-2019-1-54-30-39","DOIUrl":"https://doi.org/10.33042/2079-424x-2019-1-54-30-39","url":null,"abstract":"","PeriodicalId":186321,"journal":{"name":"Lighting engineering and power engineering","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124812779","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}