ANALYSIS OF COMPLEX MODEL OF MONITORING OF ELECTRIC POWER QUALITY PARAMETERS

The main task of Ukraine's energy strategy until 2030 is to bring the country's electricity complex in line with international requirements for efficiency and reliability of energy supply, which requires improvement of the regulatory framework of Ukraine's electricity. The introduction of international standards as national standards of Ukraine will remove many controversial issues in the modernization of energy facilities, promote domestic energy equipment in the Western market, create conditions for parallel operation of Ukraine's energy system with European energy associations, improve the quality of energy. But updating the regulatory framework of the industry requires significant time and money, so it is necessary to properly organize this process in order to improve the technical and economic efficiency (EE) of energy in the shortest possible time with minimal costs. One of the methods of solving this problem is complex standardization (CS), the methodological foundations of which were laid in Soviet times, but are outdated due to changing economic conditions and basic criteria for assessing the efficiency of energy facilities, especially their impact on humans and the environment. Therefore, it is necessary to develop a new approach to the COP in the field of electricity in modern conditions, in particular, to develop a model of the COP, methods, classification of tasks and determine the priority of standardization in the field of electricity. Standardization in the electricity sector should cover all major areas of industry development and contribute to the creation of conditions for safe operation of electricity facilities, ensuring rational energy consumption, improving the technical level and environmental safety of energy facilities, ensuring reliable and efficient operation of Ukraine's integrated energy system. Therefore, the development of the COP model should be based on the structural model of the power industry, which corresponds to the real conditions of the industry. To ensure the cost-effectiveness of the COP, it is necessary to develop a new methodology for evaluating EE development and implementation of standards for energy equipment in market conditions, as well as methodological approaches to economic optimization of the sequence of implementation of standards. Thus, the development of scientific and methodological principles for improving the system of regulatory documents of the electric power industry of Ukraine is an urgent and important task, the solution of which will contribute to the effective updating of the regulatory framework of the industry.

Efficiency Increase of Energy Systems in Oil and Gas Industry by Evaluation of Electric Drive Lifecycle

The efficiency issue of energy systems in the oil and gas industry is a crucial factor nowadays. Energy share in the production costs of oil and gas can reach 50%. Among the most important energy equipment are the electric drives of the pumps, compressors, auxiliary units, etc. The paper considered the lifecycle of the electric drives used at oil and gas fields and evaluated their efficiency parameters during periods of operational wear or malfunctioning. At the same time, the lifecycle of the energy equipment was seen as its technical state during operation. Based on the spectral analysis of the current using the finite Fourier transform (FFT), the main frequency components were identified that characterize the type and level of malfunction, taking into account defined efficiency indicators of the electric drive. A technique for assessing the technical state of an electric drive was proposed based on the normalized levels of the amplitudes of the frequency components. Predictive management of the electric drive was implemented in terms of correcting the control system when a malfunction occurs, providing the required efficiency indicators. Boundaries for the technical state of the electric drive were determined. Recommendations for further operation, terms of maintenance and repair or preventive management were presented.

Uncertainty analysis for industries investing in energy equipment and renewable energy sources

This paper studies the optimal design and operation of new energy equipment including renewable energy sources for prosumer industries. In order to augment the interest of industries in performing energy actions, the economic parameters of the investment are analysed and the risk related to it considering the uncertainty in energy markets is evaluated. A two-stage optimization approach is proposed considering the whole lifetime of the energy equipment and an uncertainty analysis performed through the evaluation of the deterministic model under Latin Hypercube Samples of uncertain parameters. A case study based on a real industry is presented, whose results expose the robustness of the optimization methodology and the acceptable risk of investing in renewable energy sources and energy equipment for prosumer purposes.

Practical Use of Drones for Energy Infrastructure Monitoring in Slovakia

Academic science, research and technology companies are currently working intensively on the possibilities of using cutting-edge information and communication technologies in practice. An example of the much-needed deployment of unmanned aerial vehicles (UAVs) is energy. This sector of the national economy requires the monitoring of large line and area objects at regular intervals in order to analyse the state of wear and damage of energy equipment. The Slovak Republic, as a modern European country, is working very intensively on the implementation of all available modern technologies in the energy sector. The text of the chapter aims to present and describe the current state of practical use of drones in the energy infrastructure in Slovakia.

Energy-Investment Decision-Making for Industry: Quantitative and Qualitative Risks Integrated Analysis

Industrial SMEs may take the decision to invest in energy efficient equipment to reduce energy costs by replacing or upgrading their obsolete equipment or due to external socio-political and legislative pressures. When upgrading their energy equipment, it may be beneficial to consider the adoption of new energy strategies rising from the ongoing energy transition to support green transformation and decarbonisation. To face this energy-investment decision-making problem, a set of different economic and environmental criteria have to be evaluated together with their associated risks. Although energy-investment problems have been treated in the literature, the incorporation of both quantitative and qualitative risks for decision-making in SMEs has not been studied yet. In this paper, this research gap is addressed, creating a framework that considers non-risk criteria and quantitative and qualitative risks into energy-investment decision-making problems. Both types of risks are evaluated according to their probability and impact on the company’s objectives and, additionally for qualitative risks, a fuzzy inference system is employed to account for judgmental subjectivity. All the criteria are incorporated into a single cost–benefit analysis function, which is optimised along the energy assets’ lifetime to reach the best long-term energy investment decisions. The proposed methodology is applied to a specific industrial SME as a case study, showing the benefits of considering these risks in the decision-making problem. Nonetheless, the methodology is expandable with minor changes to other entities facing the challenge to invest in energy equipment or, as well, other tangible assets.

Empirical Analysis of the Matching Degree between Energy Equipment Manufacturing and Market Demand: A Global Perspective

The study of matching degree between energy equipment manufacturing and market demand is crucial for energy enterprises to adjust business strategies, expand market share, and develop sustainably. Considering that the current electricity market evaluation indicators are rarely selected from a global perspective and a single evaluation method may lead to one-sided results, this article takes the technology and equipment related to electric energy as the research object and selects six indicators, including technical standards, qualification certification, export methods, after-sales service, market concentration, and product concentration. By analyzing the supply and demand characteristics of major global regional markets and the situation of Chinese power enterprises in these markets, we propose matching model cluster including osculating value method, rank-sum ratio method, ideal point method, entropy value method, and efficacy coefficient method to conduct the matching degree study. The results show that the overall market matching degree of Chinese power companies is good, especially in Southeast Asia, Central Asia, and Africa. For markets with a low degree of matching, we analyze the reasons based on the matching indicators values to provide companies with corresponding strategies and recommendations.

FEASIBILITY STUDY OF PROJECTS FOR THE PRODUCTION OF SOLID BIOFUELS FROM BIOMASS OF AGRARIAN PLANTATIONS PRUNING AND REMOVAL

The aim of the work is to carry out a feasibility study of projects for the production of solid biofuels from biomass of pruning of perennial agricultural plantations for further use in boilers. Currently, this bioenergy sector is at the beginning of its development in the EU and in Ukraine, however it has quite good prospects for the future. An assessment of the energy potential of biomass obtained from pruning and removal of orchards and vineyards in Ukraine is performed. According to data of 2019, this potential is estimated at 116.2 ktoe. Though this potential is only a minor part of the total energy potential of biomass in Ukraine (23.6 Mtoe in 2019), biomass of these types is an important local fuel for the regions of its generation and can significantly reduce their dependence on traditional energy carriers. Biomass of pruning and removal of agricultural plantations can be a feedstock for chips (more often for hog fuel) or for solid biofuels of higher quality such as pellets and briquettes. Fuel properties of such solid biofuels are slightly worse than those of biofuels from forest wood or energy crops, but still high enough for the effective use in energy equipment. The main features are higher ash content and, accordingly, lower calorific value. The feasibility study of a typical project for the production of briquettes from vineyard pruning demonstrated economic viability of such projects in Ukraine. Further research in this area will lie in the feasibility study of obtaining solid biofuels from biomass of pruning and removal of orchards, as well as projects for the production of heat from such biofuels for Ukraine’s conditions.