Preparation and preliminary analysis of data on energy consumption by municipal buildings

Perekrest, Andrii; Chornyi, Oleksii; Mur, Oleksandra; Kuznetsov, V. V.; Kuznetsova, Yevheniia; Nikolenko, Anatoliy

doi:10.15587/1729-4061.2018.147485

Cited by 17 publications

(4 citation statements)

References 11 publications

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“…A feature of the work of these systems is the provision of power to consumers of the first and second categories, namely: circuits of automatic and semiautomatic blocking, signalling, communications, outdoor track lighting, automatic heating control systems for buildings etc. [10][11][12]. Accordingly, for such networks it is necessary to determine the indicators on which the reliability of providing electric energy depends [13][14][15].…”

Section: Relevancementioning

confidence: 99%

Analysis of the neutral grounding modes influence on the reliability characteristics of local systems with renewable energy sources

Ostapchuk¹,

Kruczek²,

Kuznetsov³

et al. 2021

Diagnostyka

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When comparing the performance indicators of electrical networks with different types of neutral grounding, along with the fulfilment of the requirement to ensure reliability of power supply to consumers, serious attention is drawn to the main network parameters influencing the performance of power supply systems. Analysis of research and its results, reported above, on the influence of the neutral ground of power networks on the reliability and electrical safety conditions of the power supply systems as a whole, on the damage of distribution networks and electrical equipment as well as on the working capacity of relay protection devices, provides an opportunity to estimate each specific operation mode of the neutral and to develop recommendations aimed at strengthening the positive indicators of the corresponding modes. Other things being equal, reliability of power supply to electrical receivers or reliability of distribution networks is mainly determined by the damage to network elements and the performance of relay protection devices. The degree of influence of these factors on the reliability of distribution networks depends on the neutral mode, which in turn determines the level of internal overvoltages and the nature of transient processes at earth fault.

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Section: Relevancementioning

confidence: 99%

Analysis of the neutral grounding modes influence on the reliability characteristics of local systems with renewable energy sources

Ostapchuk¹,

Kruczek²,

Kuznetsov³

et al. 2021

Diagnostyka

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“…In previous works [8,9] the structure of information flows for obtaining data from available sources was developed. Features of data depending on type and functional features of buildings are established.…”

Section: Existing Solutions Analysismentioning

confidence: 99%

Ranking of energy consumption objects using the principal components method

Perekrest

Ogar

Vovna

et al. 2020

LEPE

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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 characterize 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. Keywords – buildings; energy consumption; principal components; machine learning; data segmentation.

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“…The Department of Automation and Instrumentation of the Dnipro University of Technology has implemented a laboratory bench (Fig. 1) being hardware-and-software complex, and involving thermal controlled object; and hardware, and software for the automated control system [13][14][15][16] which makes it possible to study and analyse the automatic systems implementing different control strategies.…”

Section: Formation Of Objectivesmentioning

confidence: 99%

Laboratory bench to analyze of automatic control system with a fuzzy controller

Tryputen¹,

Kuznetsov²,

Kuznetsov³

et al. 2020

Diagnostyka

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The paper represents laboratory bench to analyse a system of automated control with a fuzzy controller. The laboratory bench consists of a thermal object, and software and hardware complex involving logic controller VIPA System 200 V as well as HMI / SCADA system Zenon Supervisor 7.0. The thermal object is described with the help of the second-order differential equation using "current value within the power converter of electric heater-air temperature inside a thermal object" control channel. Coefficients of the differential equation depend upon location of a dampener and upon rotation frequency of a centrifugal fan.Control error (ie deviation between the specified temperature value within the thermal object and its current value), and derivative of the error, represented in the form of linguistic variables involving five triangular terms and two trapezoidal (extreme) ones have been used as the input values of the fuzzy controller. Output value of the fuzzy controller is the electric power supplied to the electric heater and assuming seven specified values. Selection of the specific value of electric power depends upon knowledge base being a finite set of rules of fuzzy sets falling into line with the applied linguistic variables.To implement such a system of automated control with a fuzzy controller, original software has been developed making it possible to analyze a process of thermal object heating with the use of human-computer interface. Interaction algorithm of certain program elements has been described. Experimental results, concerning the thermal object transfer from different initial conditions to terminal ones, have been demonstrated. A dependence of mean-square error of the controlled value upon the control period has been demonstrated.

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Preparation and preliminary analysis of data on energy consumption by municipal buildings

Cited by 17 publications

References 11 publications

Analysis of the neutral grounding modes influence on the reliability characteristics of local systems with renewable energy sources

Analysis of the neutral grounding modes influence on the reliability characteristics of local systems with renewable energy sources

Ranking of energy consumption objects using the principal components method

Laboratory bench to analyze of automatic control system with a fuzzy controller

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