scholarly journals Impact of size and distribution of installed PV power in E-W direction on the level in which selected consumers’ energy needs were met

2018 ◽  
Vol 10 ◽  
pp. 02023 ◽  
Author(s):  
Krzysztof Necka ◽  
Hubert Latala ◽  
Sławomir Kurpaska ◽  
Jarosław Knaga ◽  
Anna Karbowniczakʼ
Keyword(s):  
Power Plant ◽  
Power Distribution ◽  
Energy Demand ◽  
Energy Needs ◽  
East And West ◽  
Installed Capacity ◽  
The Impact

The aim of the study was to analyse the energy needs of selected consumers and to select the PV installed capacity in the east and west panels orientation (E-W). The analysis was carried out for two variants. The first concerned the impact of the installation power of a PV source on the contracted power in its symmetric east and west position. The second variant was the result of previous observations and studies of the authors of this paper. Thus, in this variant, the unbalanced power of PV E-W in relation to the S azimuth has been analyzed, taking into account the characteristics of the recipients' needs and the variation of the PV power installed. The analyses show that an increase in meeting the energy demand for two of the tested plants at symmetrical power distribution to the east and west occurred only when the installed power was increased to the level of approx. 1.4-1.6 of the contracted power. However, the power distribution in the E-W direction has a very strong effect on the energy amount that is generated in the power plant and cannot be used due to the lack of demand in the plant.

Modelling the Effect of the Hydroelectric Pumped Storage Plant on Hydrodynamic Regime of the Kaunas Reservoir In Lithuania

2003 ◽  
Vol 34 (5) ◽  
pp. 507-518 ◽  
Author(s):  
Brunonas Gailiusis ◽  
Jurate Kriauciuniene ◽  
Erika Rimaviciute
Keyword(s):  
Power Plant ◽  
Hydroelectric Plant ◽  
Optimal Number ◽  
Water Levels ◽  
Level Fluctuation ◽  
Simultaneous Operation ◽  
Lower Reservoir ◽  
Pumped Storage ◽  
Installed Capacity ◽  
The Impact

The Kaunas Reservoir was formed during construction of the Kaunas Hydroelectric Plant (Kaunas HP) on the Nemunas River in 1960. Since 1992 it has also been serving as a lower reservoir for the Kruonis Hydroelectric Pumped-Storage Plant (Kruonis HPP), which currently has four generating units with 200 MW of installed capacity each. There are plans to increase the capacity of this power plant by constructing additional four generating units. Operation of the Kruonis HPP is already changing the hydrophysical regime (water levels and flow velocities) of the Kaunas Reservoir and new units can seriously aggravate the situation by inducing bottom erosion. The objective of this study is to determine the optimal number of generating units so that the impact of the Kruonis HPP on the hydrophysical regime of the reservoir would be acceptable. The hydrodynamic model MIKE 21 was used to calculate the flow velocity and water level fluctuation in the Kaunas reservoir for different number of the Kruonis HPP generating units. The Kaunas HP was considered as operating with minimal load or under conditions equivalent to a big flood (2,000 m3/s). The modelling results indicate that the impact of four units is acceptable while simultaneous operation of the eight units at Kruonis HPP would not be desirable.

Repositioning gas in the power generation mix

2018 ◽  
Vol 58 (2) ◽  
pp. 647
Author(s):  
Martin Wilkes
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Energy Demand ◽  
International Energy Agency ◽  
Potential Range ◽  
Energy Agency ◽  
Energy Needs ◽  
World Energy ◽  
The One ◽  
The Impact

Since the turn of the century, gas has been highlighted as the transition fuel to a lower emissions world, and, in 2011, the International Energy Agency published a special report entitled ‘Are we entering the golden age of gas’, which indicated that gas use could rise by over 50% to provide more than 25% of world energy demand by 2035. Even though gas use has risen in tandem with the increase in renewable energy, over the past decade, coal has been the fastest growing fuel because developing countries choose cheap power to provide their growing energy needs. Gas has been, and continues to be, subject to a green, cheap squeeze; squeezed by cleaner renewables on the one hand, and cheaper coal on the other. This paper will look at the impact that increasing amounts of renewable energy has on existing power generation and supply systems, and provide insights into the potential range of outcomes in emission levels, and the need to not only discuss renewable energy target, but to also understand the total energy mix, and the need to reposition gas from a transition fuel to the natural long-term companion of renewables.

scholarly journals Assessing the impact of demand response programs on the reliability of the Ghanian distribution network

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248012
Author(s):  
Ernestina M. Amewornu ◽  
Nnamdi I. Nwulu
Keyword(s):  
Renewable Energy ◽  
Total Energy ◽  
Demand Response ◽  
Power Distribution ◽  
Energy Demand ◽  
Supply And Demand ◽  
Distribution Network ◽  
Distribution Networks ◽  
Diesel Generator ◽  
The Impact

The balancing of supplied energy to energy demand is often very challenging due to unstable power supply and demand load. This challenge causes the level of performance of distribution networks to be lower than expected. Research has however, shown the role of demand response (DR) on the performance of power networks. This work investigates the influence of DR, in the presence of incorporated renewable energy, on technical loss reduction, reliability, environment, energy saved and incentives paid to consumers with the help of PSAT and AIMMS software. Results from simulation have shown that the introduction of renewable energy into a Ghanaian distribution network coupled with implementing the proposed DR improves total energy supply by 9.8% at a corresponding operation cost reduction of 72.79%. The GHG and technical loss reduced by 27.26% and 10.09% respectively. The total energy saving is about 105kWh and 5,394.86kWh, for domestic and commercial loading profiles, respectively. Incentives received by consumers range between 45.14% and 58.55% more than that enjoyed, without renewable energy, by domestic and commercial consumers. The utility benefit also increased by 76.96% and 67.31% for domestic and commercial loads than that without renewable energy. Network reliability improves with implementation of DR. However, the reliability of a grid-connected network is better with a diesel generator only than with the integration of renewable energy. The power distribution companies, therefore, need to consider the implementation of incentive-based demand response program.

scholarly journals Assessment of the turkey’s electric power policies in terms of sustainability

2014 ◽  
Vol 18 (3) ◽  
pp. 695-707 ◽  
Author(s):  
Selcuk Atis ◽  
Nevzat Onat ◽  
Irfan Guney
Keyword(s):  
Sustainable Development ◽  
Renewable Energy ◽  
Energy Demand ◽  
Emission Rates ◽  
Demand Growth ◽  
Local Resources ◽  
Energy Projects ◽  
Increasing Demand ◽  
Installed Capacity ◽  
The Impact

This study, using statistical data published by the Turkish Electricity Transmission Company, analyzes key parameters such as installed capacity and energy demand growth rates, investment plans and emission rates, taking into consideration the expected increase in use through the year 2023. The results of the analyses were compared to relevant data from around the world. The weight of domestic - and especially renewable - resources in investment plans for the next 10 years was discussed. Recommendations for an investment plan to support sustainable development in Turkey are listed. Consequently, the lack of investment in domestic and renewable energy projects decreases the competitive power of Turkey vis-?-vis Organisation for Economic Co-Operation and Development countries in terms of many parameters. For a sustainable development, the country must make significant changes in its foreign-dependent energy production policies. Any future policies must encourage supplying local resources to meet the continuously increasing demand. Qualifications for incentive mechanisms applied to investments in renewable energy should be developed. The impact of the private sector on the installation of new plants must also be increased by quickly completing the privatization process.

scholarly journals Analysis of the Impact of the Assumed Moment of Meeting Total Energy Demand on the Profitability of Photovoltaic Installations for Households in Poland

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1637
Author(s):  
Natalia Iwaszczuk ◽  
Mariusz Trela
Keyword(s):  
Sensitivity Analysis ◽  
Total Energy ◽  
Energy Demand ◽  
Electricity Demand ◽  
First Year ◽  
Market Prices ◽  
The Future ◽  
Installed Capacity ◽  
The Impact

In this article, the authors analyzed two extreme investment variants considering the installed capacity of Poland’s residential pv installation: (a) pv installation meets electricity demand only in the first year of operation, and in each subsequent year it is necessary to purchase electricity at market prices; (b) installation meets electricity demand even in the last year of operation, and in each previous year, the excess of generated electricity needs to be transferred back to the grid, with the limited (by law) right of drawing it from the grid for free in the future. In the article, a sensitivity analysis was performed, and profitability changes were established based on the NPV value, depending on case (a) or (b). The performed analyses showed that the pv installation profitability should not be analyzed, assuming only one moment when it meets 100% of the household’s electricity demand. It was shown that the choice of such a moment, depending on the value of particular technical and financial parameters, can lead to a change in the NPV value, even over 10%. Although the studies were done for Poland, such an approach can be implemented in other countries.

Impact of Thermal Insulation and Type of Windows on Energy Demand of Buildings with Passive House Standard

2015 ◽  
Vol 725-726 ◽  
pp. 1519-1529
Author(s):  
Milos Knezevic ◽  
Meri Cvetkovska ◽  
Strahinja Trpevski ◽  
Andrej Andreev ◽  
Ana Trombeva Gavriloska ◽  
...  
Keyword(s):  
Energy Demand ◽  
Building Envelope ◽  
Thermal Isolation ◽  
Passive House ◽  
Factors Affecting ◽  
Building Orientation ◽  
Energy Needs ◽  
Basic Parameters ◽  
The Impact ◽  
House Standard

The building orientation and the thickness of the thermal isolation of the building envelope are one of the factors affecting the achievement of the Passive House standard. Other important factors are the windows. For the windows the three basic parameters that influence the achievement of the Passive House standard are: the size of the windows in facade elements, the type of the glass and the type of the window frames. Analysis based on variations of all these parameters give a clear picture of the impact of each of these parameters as well as of their combination on the energy needs of the Passive House. The calculations presented in this paper were based on the methods of thermodynamics, using MKS EN and DIN standards, and the program packages PHPP 2007, HEAT2 and NOVOLIT

scholarly journals Relation between Electric Vehicles and Operation Performance of Power Grid

2021 ◽  
Vol 25 (1) ◽  
pp. 1142-1151
Author(s):  
Gunars Valdmanis ◽  
Gatis Bazbauers
Keyword(s):  
Electric Vehicles ◽  
Power Distribution ◽  
Distribution System ◽  
Economic Effect ◽  
Power Grids ◽  
Operation Performance ◽  
Charging Infrastructure ◽  
Power Distribution System ◽  
Installed Capacity ◽  
The Impact

Abstract Rapidly increasing number of electric vehicles (EV) is expected in the future. It is important to understand the consequences of this process for operation of power grids. The goal of this study was to determine an impact of increasing number of EV on the economic performance of electricity distribution system, including the impact on users of power distribution infrastructure. Factors, such as expected network load changes and required investment in the networks as well as possible changes in power distribution tariff were considered. Analysis of Latvia’s power distribution system shows that the installed capacity significantly exceeds the load. It means that connection of EV charging infrastructure to the system and resulting increase of the system’s load may not require additional investments and even could bring a positive economic effect due to better utilization of the infrastructure.

Fuzzy multi-objective decision making approach for nuclear power plant installation

2020 ◽  
Vol 39 (5) ◽  
pp. 6339-6350
Author(s):  
Esra Çakır ◽  
Ziya Ulukan
Keyword(s):  
Linear Programming ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Energy Supply ◽  
Energy Demand ◽  
Nuclear Power ◽  
Power Plants ◽  
Total Duration ◽  
Objective Functions ◽  
Multi Objective

Due to the increase in energy demand, many countries suffer from energy poverty because of insufficient and expensive energy supply. Plans to use alternative power like nuclear power for electricity generation are being revived among developing countries. Decisions for installation of power plants need to be based on careful assessment of future energy supply and demand, economic and financial implications and requirements for technology transfer. Since the problem involves many vague parameters, a fuzzy model should be an appropriate approach for dealing with this problem. This study develops a Fuzzy Multi-Objective Linear Programming (FMOLP) model for solving the nuclear power plant installation problem in fuzzy environment. FMOLP approach is recommended for cases where the objective functions are imprecise and can only be stated within a certain threshold level. The proposed model attempts to minimize total duration time, total cost and maximize the total crash time of the installation project. By using FMOLP, the weighted additive technique can also be applied in order to transform the model into Fuzzy Multiple Weighted-Objective Linear Programming (FMWOLP) to control the objective values such that all decision makers target on each criterion can be met. The optimum solution with the achievement level for both of the models (FMOLP and FMWOLP) are compared with each other. FMWOLP results in better performance as the overall degree of satisfaction depends on the weight given to the objective functions. A numerical example demonstrates the feasibility of applying the proposed models to nuclear power plant installation problem.

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