Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine

The rapid pace of the introduction of renewable electricity generation sources (REGS) in Ukraine's Integrated Power System (IPS) has brought about a number of problems such as rapid growth in prices provoked by the introduction of REGS and inability to ensure reliable compensation for their cap...

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Дата:2014
Автори та афіліації:
  • Kostyukovskyi B.A.
  • Shulzhenko S.V.
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Автори: Kostyukovskyi B.A., Shulzhenko S.V.
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Мова:Українська
Опубліковано: General Energy Institute of the National Academy of Sciences of Ukraine 2014
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System Research in Energy
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author Kostyukovskyi B.A.
Shulzhenko S.V.
author_facet Kostyukovskyi B.A.
Shulzhenko S.V.
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author_sort Kostyukovskyi B.A.
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datestamp_date 2026-07-18T12:57:41Z
description The rapid pace of the introduction of renewable electricity generation sources (REGS) in Ukraine's Integrated Power System (IPS) has brought about a number of problems such as rapid growth in prices provoked by the introduction of REGS and inability to ensure reliable compensation for their capacity fluctuations due to insufficient manoeuvrability of Ukraine's IPS. These problems could be solved by substantially improving the existing public system of incentives for REGS development.Any further uncontrolled development of REGS, primarily high-capacity WFs and PVPSs as part of Ukraine's IPS will drastically reduce power supply reliability while increasing the risk of accidents. Considering the low purchasing capacity of Ukrainian consumers and highly energy intensive economy this, in its turn, may precipitate electricity non-payment crisis.Taking into account the above, the existing incentives for the development of high-capacity WFs and PVPSs based on feed-in tariff should be replaced by a mechanism that would reasonably reduce the introduction of new capacities of such REGS adjusting them to the IPS capability to ensure power supply in parallel operation with the national power grid while ruling out substantial price increase for local consumers.This incentive mechanism for the development of highcapacity WFs and PVPSs has been created based on combined advantages offered by investment grants and competitive selection of construction projects. The article also presents an algorithm to implement such mechanism, according to which electricity sector management and operating bodies will determine possible scope of introduction of new capacities at WFs and PVPSs taking into account technical and financial capabilities.
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fulltext 13ISSN 1562-8965. Проблеми загальної енергетики, 2014, вип. 2 (37) UDK 621:311;621.646:502.3 B.A. KOSTYUKOVSKYI, Candidate of Science (Eng.), S.V. SHULZHENKO, Candidate of Science (Eng.), Institute of General Energy National Academy of Sciences of Ukraine) VIABLE AREAS FOR IMPROVING INCENTIVES TO INTRODUCE RENEWABLE ELECTRICITY GENERATION SOURCES IN UKRAINE This article discusses the issue of introducing renewable electricity generation sources in Ukraine's integrated power system after imposing feed-in tariff with a view to promoting their development. It points out that their further uncontrolled development may have serious neg- ative repercussions on reliable supply of electric power to local consumers, bringing about dramatic growth in tariffs. This makes necessary further improvement of incentives to pro- mote the development of renewable electricity generation sources, the viable ones being presented in this article. K e y w o r d s: electric power, renewable energy sources, wind farm, photovoltaic power sta- tion, state policy. The rapid pace of the introduction of renewable electricity generation sources (REGS) in Ukraine's Integrated Power System (IPS) has brought about a number of problems, which could be solved by sub- stantially improving the incentives for REGS devel- opment. This work aims to study these problems and identify viable areas for improving incentives for REGS development in Ukraine taking into consid- eration the specific conditions of the development and functioning of the national economy and ener- gy sector. A stable development of Ukraine's economy is impossible without the efficient operation of its IPS, with key criteria of efficient operation being defined as the ability to ensure: 1. Acceptable prices for electric power both for the utilities and the consumers. 2. Normalized power quality and reliable operation of the IPS. These objectives will be much more difficult to achieve if REGS, primarily wind farms (WFS) and photovoltaic power stations (PVPSs) are integrated to the IPS. The key factors responsible for this situ- ation are presented below. In general, REGS are uncompetitive compared to conventional power plants, and with their intro- duction electricity price for consumers will rise. This price increase - ΔCt, could be deduced from the following formula: correspond in equal condi- tions to the electricity price under the base case optimal IPS development scenario, which excludes the introduction of uncompetitive REGS technolo- gies, and the price under the base case optimal IPS development scenario when REGS are introduced to a certain amount. The increase in the production cost of electrici- ty is not only caused by the higher cost of REGS- generated electricity, but also by the rising cost of electric power generated by conventional power plants as a result of decreased electricity production and the badly needed investment in the power grid development, automation and management sys- tems, raising thus transmission cost. On the other hand, integrating WFs and PVPSs in the power grid has virtually no impact on the required capacity lev- els of the IPS’s conventional power plants, provid- ing only some extra capacity to the IPS. Another problem is to compensate for WFs and PVPSs capacity fluctuations caused by objective instability of the primary energy source, which they© B.A. KOSTYUKOVSKYI, S.V. SHULZHENKO, 2014 where and B.A. KOSTYUKOVSKYI, S.V. SHULZHENKO ISSN 1562-8965. Проблеми загальної енергетики, 2014, вип. 2 (37)14 utilise (for instance, changes in wind velocity and solar radiation intensity), while maintaining nor- malized power quality (frequency, voltage, etc.). This problem could be solved by using regulating capacities provided by conventional power plants and/or special controlled load consumers. It is common knowledge that if REGS capacities exceed IPS capability to compensate for such capacities fluctuations, the IPS in the best case sce- nario will not be able to maintain normalized power quality. In the worst case scenario, this will bring about system blackouts with serious negative and possibly catastrophic socio-economic and environ- mental consequences. Presently, these problems have aggravated in the countries that had the highest introduction rates and the share of REGS in the structure of generat- ing capacities. This concerns, in the first place, the EU countries, where REGS introduction rates have been substantially cut down, and even a moratori- um is being imposed on their tapping into the IPS. This is the case with Spain, where enormous subsi- dies required for the development of solar and wind energy have put the country in dire economic straits. [1]. In Ukraine, a somewhat paradoxical situation came to exist with regard to REGS development. Ukraine's Energy Strategy until 2030, which was approved in 2006 [2] (the 2006 Strategy) and effec- tive until 2013, was silent about any incentives for or any substantial development of REGS. As appears from the studies carried out in the process of the Strategy development, the following factors were behind that: 1. Ukraine's IPS has low manoeuvrability and the problems related to the power quality and secu- rity of supply are largely resolved by its parallel operation with Russia's electric power system. Should some technical, economic or other factors make the parallel operation with Russia impossible, Ukraine will face problems ensuring a reliable power supply and quality even without introducing REGS. Increasing WFs and PVPSs capacities may dramatically aggravate this problem and cause per- manent emergency situations in Ukraine's power system. 2. Given Ukraine's energy-intensive economy, the impossibility of curtailing energy consumption within a short term and the low paying capacity of the consumers, a significant growth in cost of elec- tric power provoked by REGS introduction will have an extremely negative socio-economic impact, bringing down local manufacturers' competitive- ness and standard of living for households. 3. The high rate of obsolescence of plants and equipment calls for heavy investments in the con- ventional power engineering sector and existing networks to ensure reliable power supply. Shorter payback periods and lower investment risks in case some preferences are provided for renewable elec- tricity-generation technologies will increase invest- ments in their development, limiting the possibility of addressing much more acute problems in the national power industry than REGS introduction. 4. Most parts of REGS equipment are not manufactured in Ukraine and their imports will make worse the country's already negative trade bal- ance and pressure on national currency. However, contrary to the 2006 Strategy, the Law of Ukraine "On the Power Industry" [3] incorporat- ed changes [4] creating most favourable conditions for investing in local REGS. Except for some refer- ence to world trends, no in-depth feasibility study substantiating such decision was presented, no con- sideration was given to the above problems con- cerning REGS introduction, to Ukraine's specifics and possible consequences for the economy and reliable operation of the IPS. These changes imposed an encouraging, very high basic feed-in tariff, whereas the State guaran- teed purchasing feed-in electricity that was not sold under contracts with consumers or electric utilities. This minimum tariff was set as a retail price for the second class voltage consumers in January 2009 multiplied by the feed-in tariff ratio for the electric- ity produced by each type of REGS. In case of PVPSs, the derived value is additionally increased by the tariff rate applied for the peak hours (for three-zone tariff classification). At the same time, it guaranteed no-charge connection of REGS to elec- tricity mains and, which may have no precedents in the world, minimization of currency risks by peg- ging the minimum feed-in tariff to the current euro exchange rate set by the National Bank of Ukraine for the respective period of time. If the euro rate is higher than it was in January 2009, the feed-in tar- iff is increased proportionally. The National Electricity Regulatory Commission (NERC) reviews it therefore on a monthly basis. In this context, the fast growth of the REGS capacity in this country was only a matter of time, Viable areas for improving incentives to introduce renewable electricity generation sources in Ukraine ISSN 1562-8965. Проблеми загальної енергетики, 2014, вип. 2 (37) 15 while some possible negative consequences of introducing the above incentives were pointed at virtually immediately after these changes took effect. [5-6]. This also enabled using the Joint implementa- tion mechanism under the Kyoto Protocol to the United Nations Framework Convention on Climate Change, which made renewable power generation even more attractive. Against this background, an investment boom started in Ukraine's REGS sector as experts had predicted. The declared capacity of projected REGS reached around 17 GW as soon as in 2010- 2011, where wind and solar energy projects had the lion's share. The projects were launched rather fast, and the installed capacity of the renewable energy facilities operating under the feed-in tariff totalled 1.216 GW as of 1 January 2014, growing more than 12-fold against 2009. In 2013 alone, PVPSs operat- ing under the feed-in tariff doubled their capacity, increasing it from 371.6 MW to 746.9 MW, wind power capacity rose from 275.7 MW to 370.7 MW or by almost 34.5%, small hydropower plants showed a modest growth from 73.5 MW to 75.3 MW, and electricity produced from biomass jumped more than 4-fold, from 4.2 MW to 17.2 MW. Power output rose from 638.6 million kWh in 2012 to 1,247 million kWh in 2013, showing a near- ly double increase. However, fast growth of REGS capacity and electricity output are rapidly building up their pressure on the price of electricity to con- sumers (Table). As appears from the above Table, while not reaching 1% of the output, cost of electricity pro- duced by REGS accounted for almost 5% of the total cost of power supplied to the market. It is clear that further growth in REGS output and declining hryvnia/euro exchange rate, providing a substantial compensation for lowering feed-in tariffs over the long term as foreseen in legislation, will result in further increase in REGS influence on the price of electricity to ultimate consumers that are actually subsidizing REGS development. In this context, the price will be growing uncontrollably and fast. The studies carried out by the National Academy of Sciences of Ukraine Institute of General Energy [5- 7] show that subject to specific conditions of the development of the national power engineering sec value will be 1.5 to 2 times higher than by around 2030. On the other hand, even with the existing wind and solar capacities and the paral- lel operation with Russia's electric power system, serious problems have already occurred in ensuring reliable operation of Ukraine's IPS. In view of the customary cross-subsidization this burden falls chiefly on economic entities, above all industry, thus exacerbating its already poor ability to compete. It was not until possible catastrophic conse- quences of any further uncontrolled growth of wind and solar energy in Ukraine became clear to almost everyone, not only to experts, that efforts were made to restrict the development of renew- ables by substantially increasing the so-called "local" component (a certain share in the equip- ment/construction and installation services manu- factured/provided by companies operating in Ukraine) in REGS construction projects [8]. Starting from 1 July 2014 this component is sup- posed to make up at least 50%. REGS share in power supply to Wholesale Electricity Market and in total cost of electricity, in %* tor, the However, the capability of this mechanism to substantially restrict the introduction of wind and solar energy capacities is raising serious doubts for the following reasons: 1. Our Energy Community and European Union partners, international financing institutions consider such measures as discrimination against foreign investors, and make strenuous efforts to remove the "local" component; its virtual elimina- tion is one of the requirements for Ukraine in the framework of its Association Agreement with and membership in the EU. 2. The production localisation process got off to a flying start, in particular, the Wind Farms of Ukraine Group has already been licensed to manufacture 2.05 MW, 2.5 MW and 3 MW wind power turbines, and representatives of the company have published its capacity to produce up to 100 turbines a year. The "local" component may therefore only slightly slow down the REGS development in Ukraine and decrease imports of technologies for REGS introduction. Ukrainian economy and power engineering sector will, however, have to cope with uncontrolled development of WFs and PVPSs in the longer term. In view of this, it is necessary to refashion the incentive system for REGS development, which in the first place concerns WFs and PVPSs. It would be reasonable to continue stimulating the development of small hydro power plants and biomass-fuelled thermal power facilities, especially, if the issues related to flood protection and disposal of agricultural, forestry and solid household waste are resolved at the same time, taking into consider- ation the general scarcity of the feasible potential of such sources. The existing potential should also be preserved for low-capacity (up to 5 kW) WFs and PVPSs; however, tight control should be exercised over feed-in volumes. With regard to WFS and PVPSs, the new stimu- lation system should primarily limit bringing into operation of new capacities at such REGS accord- ing adjusting them to Ukraine's IPS capability to provide a reliable supply of electric power to its con- sumers when REGS operate parallel with the national power grid. On the other hand, the new system must not lead to a dramatic price increase for Ukrainian consumers. It is reasonable that these two prerequisites, as shown in analysis [9-10], should be met by intro- ducing a mechanism stimulating the development of high-power wind farms and photovoltaic power stations using the combination of advantages offered by investment grants and competitive selec- tion of construction projects. This mechanism will provide investment grants to wind and solar construction project owners on competitive basis when their electricity is purchased at average conventional sector prices formed at the Wholesale Electricity Market, or at such market prices one day in advance when a new electricity market model is introduced based on bilateral agreements and a balancing market. The funding source is provided by the investment surcharge to tariff for generated electricity at the rate of 1%. New capacities are introduced at WFs and PVPSs according to the following algorithm: 1. A State Fund for Support of Wind and Solar Energy Development (WSEF) is set up. 2. The system operator, whose functions are presently performed by Ukrenergo, determines on an annual basis the possible scope of introduction of wind and solar capacities ensuring stability of the national IPS, taking into account conventional generating capacities and REGS development plans, as well as electricity mains, power system manoeuvrability, expected electric power use levels and conditions, etc., as well as risks related to incomplete performance of the planned activities. 3. The WSEF invites tenders and selects pro- posals for the construction of WFs and PVPSs with- in the scope determined in step 2. A list of projects potentially eligible for investment support from the WSEF is prepared and the amount of funds required for their implementation is identified tak- ing into account connections. 4. NERC identifies financial capacities to support WF and PVPS development with a 1% investment surcharge to tariffs (prices) for electric- ity for the next year and relays them to the WSEF. 5. The WSEF, taking into consideration finan- cial restrictions, prepares the final list of WFs and PVPSs that will receive investment grants, and makes contracts with the owners of such projects. Such mechanism would minimize risks associat- ed with price shocks and system blackouts, which will be steadily increasing if the uncontrolled devel- opment of WFs and PVPSs continues. Of course, the investors that have already man- aged to register their WFs and PVPSs construction projects, our Energy Community and EU partners, international financing institutions will hardly be in raptures over the introduction of such system, but Ukraine has virtually no other way out considering 16 ISSN 1562-8965. Проблеми загальної енергетики, 2014, вип. 2 (37) B.A. KOSTYUKOVSKYI, S.V. SHULZHENKO its current financial situation, paying capacity of the consumers, which may drop dramatically given extremely complicated relations with Russia, and the technical condition of Ukraine's ISP. Conclusions 1. The established system for subsidizing the development of high-power WFS and PVPSs is posing grave threats as their unpredictable develop- ment supported by substantial preferences, which provide gradual growth of their capacities, may stir up a new non-payment crisis, reduce home manu- facturers' ability to compete and trigger system blackouts in Ukraine's IPS. We have already had such experiences. 2. It is reasonable to encourage the develop- ment of high-power WFs and PVPSs based on inte- grating investment grants with competitive selec- tion of projects. Such mechanism could be imple- mented by establishing a State Fund for Support of Wind and Solar Energy Development (WSEF). Based on proposals put forward by Ukrenergo and NERC, the WSEF will make a list of investment projects which will not cause any problems for the country while ensuring reliable operation of Ukraine's IPS and not placing crushing burden on power consumers. 3. It is necessary for the government to come up with a clear public explanation for such steps as the response of all stakeholders will be extremely negative if the existing situation continues. References 1. Испания перестала поддерживать ВИЭ [Електронний ресурс] – Режим доступу: http://peretok.ru/trading/bworldonline-com- ispaniya-perestala-podderzhivat-vie.html 2. Енергетична стратегія України на період до 2030 року. – Київ, 2006. – 129 с. (розпорядження Кабінету Міністрів України від 15 березня 2006 р. № 145-р.). 3. Закон України про електроенергетику, м. Київ, від 16 жовтня 1997 року № 575/97- ВР [Електронний ресурс] – Режим доступу: h t t p : / / z a k o n . r a d a . g o v . u a / c g i - bin/laws/main.cgi?nreg=575%2F97-%E2%F0. 4. Про внесення змін до Закону України «Про електроенергетику» щодо стимулю- вання використання альтернативних джерел енергії / Закон України від 1 квітня 2009 року №1220-VI – Відомості Верховної Ради України (ВВР). – 2009. – № 32–33. – C. 496. 5. Костюковський Б.А. Оцінка доцільно- сті та можливих наслідків запровадження на законодавчому рівні спеціального «зелено- го» тарифу на електроенергію в Україні / Б.А. Костюковський // Проблеми загальної енергетики. – 2010. – № 21. – С. 11–16. 6. Вплив на стан та розвиток електроенер- гетики впровадження «зеленого тарифу» та нової моделі ринку електроенергії в Україні / Б.А. Костюковський, М.В. Парасюк, С.В. Шульженко, Т.П.Нечаєва // Проблеми загальної енергетики. – 2010. – Вип. 3 (23). – С. 13–18. 7. Аналіз ефективності реалізації альтер- нативних стратегій розвитку структури гене- руючих потужностей ОЕС України / Б.А. Костюковський, М.В. Парасюк, С.В. Шульженко, Т.П. Нечаєва // Проблеми загальної енергетики. – 2013. – Вип. 1 (32). – С. 14–19. 8. Про внесення змін до Закону України «Про електроенергетику» щодо стимулю- вання виробництва електроенергії з альтер- нативних джерел енергії». Закон України від від 20 жовтня 2012 № 5485-17 // Відомості Верховної Ради (ВВР). – 2013. – № 51 – C. 714. 9. Шульженко С.В., Костюковський Б.А., Біленко М.С., Нечаєва Т.П. Аналіз доціль- ності використання різних механізмів дер- жавної підтримки розвитку вітроенергетики в умовах України // Проблеми загальної енергетики: Наук. зб. – 2004. – № 11. – C. 33–38. 10. Звіт про наукову роботу «Визначення доцільних обсягів використання відновлю- ваних джерел енергії в структурі виробницт- ва електричної та теплової енергії», № держ- реєстрації 0111U002037. – Київ: Інститут загальної енергетики НАН України, 2013. – 170 с. Надійшла до редколегії 28.03.2014 Рецензент Зав. відділу прогнозування розвитку та управління функціонуванням електроенергетики ІЗЕ НАН України, д-р техн. наук, ст. наук. співр. С.В. Дубовський 17ISSN 1562-8965. Проблеми загальної енергетики, 2014, вип. 2 (37) Viable areas for improving incentives to introduce renewable electricity generation sources in Ukraine
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spelling systemreorg-article-5172026-07-18T12:57:41Z Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine Доцільні напрями удосконалення системи стимулювання впровадження відновлюваних джерел виробництва електроенергії в умовах України Kostyukovskyi B.A. Shulzhenko S.V. electric power, renewable energy sources, wind farm, photovoltaic power station, state policy. електроенергія, відновлювані джерела енергії, вітрова електрична станція, сонячна електрична станція, державна політика. The rapid pace of the introduction of renewable electricity generation sources (REGS) in Ukraine's Integrated Power System (IPS) has brought about a number of problems such as rapid growth in prices provoked by the introduction of REGS and inability to ensure reliable compensation for their capacity fluctuations due to insufficient manoeuvrability of Ukraine's IPS. These problems could be solved by substantially improving the existing public system of incentives for REGS development.Any further uncontrolled development of REGS, primarily high-capacity WFs and PVPSs as part of Ukraine's IPS will drastically reduce power supply reliability while increasing the risk of accidents. Considering the low purchasing capacity of Ukrainian consumers and highly energy intensive economy this, in its turn, may precipitate electricity non-payment crisis.Taking into account the above, the existing incentives for the development of high-capacity WFs and PVPSs based on feed-in tariff should be replaced by a mechanism that would reasonably reduce the introduction of new capacities of such REGS adjusting them to the IPS capability to ensure power supply in parallel operation with the national power grid while ruling out substantial price increase for local consumers.This incentive mechanism for the development of highcapacity WFs and PVPSs has been created based on combined advantages offered by investment grants and competitive selection of construction projects. The article also presents an algorithm to implement such mechanism, according to which electricity sector management and operating bodies will determine possible scope of introduction of new capacities at WFs and PVPSs taking into account technical and financial capabilities. Швидкі темпи впровадження відновлювальних джерел виробництва електричної енергії (ВДВЕ) до Об’єднаної електроенергетичної системи (ОЕС) України зумовило виникнення низки проблем, вирішення яких потребує удосконалення існуючої державної системи стимулювання їх розвитку. Зокрема це стосується швидкого зростання цін за рахунок впровадження ВДВЕ та неможливості забезпечити надійну компенсацію коливань їх потужності через недостатні маневрові можливості ОЕС України.Подальший неконтрольований розвиток ВДВЕ, що, у першу чергу, стосується потужних ВЕС та СЕС в складі ОЕС України приведе до різкого зниження надійності електропостачання та зростання ймовірності виникнення аварій, може викликати кризу платежів за електроенергію з огляду на низьку платоспроможність споживачів України та значну електроємність вітчизняної економіки.З урахуванням означеного, запропонована заміна існуючого механізму стимулювання розвитку потужних ВЕС та СЕС на базі «зеленого» тарифу, на механізм, що дозволяє раціонально обмежувати впровадження нових потужностей на цих типах ВДВЕ відповідно до можливостей ОЕС України надійно забезпечувати електропостачання споживачів при їх паралельній роботі з енергосистемою країни та не веде до значного зростання цін для споживачів України.Цей механізм стимулювання розвитку потужних ВЕС та СЕС розроблено на основі об’єднання переваг механізму інвестиційних субсидій та відбору проектів їх будівництва на тендерних засадах. В статті наведено алгоритм його реалізації, за якого органи управління розвитком та функціонування електроенергетики країни визначають можливі обсяги впровадження нових потужностей на ВЕС та СЕС на основі технічних та фінансових можливостей. General Energy Institute of the National Academy of Sciences of Ukraine 2014-04-29 Article Article application/pdf https://systemre.org/index.php/journal/article/view/517 System Research in Energy; No. 2 (37) (2014): The Problems of General Energy; 13-17 Системні дослідження в енергетиці; № 2 (37) (2014): Проблеми загальної енергетики; 13-17 2786-7102 2786-7633 uk https://systemre.org/index.php/journal/article/view/517/452 Copyright (c) 2014 Kostyukovskyi B.A., Shulzhenko S.V. https://creativecommons.org/publicdomain/zero/1.0
spellingShingle electric power
renewable energy sources
wind farm
photovoltaic power station
state policy.
Kostyukovskyi B.A.
Shulzhenko S.V.
Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine
title Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine
title_alt Доцільні напрями удосконалення системи стимулювання впровадження відновлюваних джерел виробництва електроенергії в умовах України
title_full Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine
title_fullStr Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine
title_full_unstemmed Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine
title_short Viable Areas for Improving Incentives to Introduce Renewable Electricity Generation Sources in Ukraine
title_sort viable areas for improving incentives to introduce renewable electricity generation sources in ukraine
topic electric power
renewable energy sources
wind farm
photovoltaic power station
state policy.
topic_facet electric power
renewable energy sources
wind farm
photovoltaic power station
state policy.
електроенергія
відновлювані джерела енергії
вітрова електрична станція
сонячна електрична станція
державна політика.
url https://systemre.org/index.php/journal/article/view/517
work_keys_str_mv AT kostyukovskyiba viableareasforimprovingincentivestointroducerenewableelectricitygenerationsourcesinukraine
AT shulzhenkosv viableareasforimprovingincentivestointroducerenewableelectricitygenerationsourcesinukraine
AT kostyukovskyiba docílʹnínaprâmiudoskonalennâsistemistimulûvannâvprovadžennâvídnovlûvanihdžerelvirobnictvaelektroenergíívumovahukraíni
AT shulzhenkosv docílʹnínaprâmiudoskonalennâsistemistimulûvannâvprovadžennâvídnovlûvanihdžerelvirobnictvaelektroenergíívumovahukraíni