scholarly journals Methods Improving Energy Efficiency of Photovoltaic Systems Operating under Partial Shading

2021 ◽  
Vol 11 (22) ◽  
pp. 10696
Author(s):  
Pavel Kuznetsov ◽  
Leonid Yuferev ◽  
Dmitry Voronin ◽  
Vladimir A. Panchenko ◽  
Michał Jasiński ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Production ◽  
Power Plants ◽  
Parametric Optimization ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Partial Shading ◽  
The Sustainable Development ◽  
Pv Systems ◽  
Pv Modules

This article is devoted to the relevant problem of increasing the efficiency of PV systems. The presented analysis discusses the available methods for improving the power generation of PV modules under partial shading. Mathematical models for power loss calculation were compiled based on the results of this analysis. The proposed approach minimizes the negative impact of partial shading on the energy production of PV modules. It is based on the equalization of voltages of parallel-connected arrays of modules by installing additional power elements in them. The proposed solution is promising for various areas; it allows for the minimization of the unfavorable influence of existing urban objects (buildings, trees, communications, etc.) on the energy efficiency of PV modules. The obtained results are useful for the sustainable development of the urban environment in the context of digital transformation. They are the basis for the promising methodology of the parametric optimization of power plants using renewable energy sources.

Increasing the Energy Efficiency of Photovoltaic Systems Operating Under Conditions of Uneven Illumination

2019 ◽  
pp. 88-114 ◽  
Author(s):  
Leonid Yuferev ◽  
Pavel Nikolaevich Kuznetsov
Keyword(s):  
Energy Efficiency ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Electric Energy ◽  
Energy Sources ◽  
Partial Shading ◽  
Solar Power Plants ◽  
Parallel Voltage ◽  
Selection Of

The presented research was carried out at existing solar power plants and renewable energy sources laboratories, whose purpose was to increase the energy efficiency of photovoltaic installations with parallel and mixed switching of photocells, operating under uneven illumination, parallel voltage arrays of photovoltaic modules due to voltage equalization. Experimental characteristics of photovoltaic installations with the developed device for coordinating the array of photoelectric modules (DCA), realizing a method of selection of electric energy and without its use are given. It is experimentally shown that the use of DCA increases the electrical power of the array with partial shading up to 2.6 times with partial shading. The results of the research can be used to design new photovoltaic installations and upgrade existing ones.

scholarly journals A Simple Mismatch Mitigating Partial Power Processing Converter for Solar PV Modules

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2308
Author(s):  
Kamran Ali Khan Niazi ◽  
Yongheng Yang ◽  
Tamas Kerekes ◽  
Dezso Sera
Keyword(s):  
Experimental Tests ◽  
Energy Yield ◽  
Power Electronic ◽  
Solar Pv ◽  
Partial Shading ◽  
Loss Analysis ◽  
Pv Systems ◽  
Pv Module ◽  
Pv Modules ◽  
In Series

Partial shading affects the energy harvested from photovoltaic (PV) modules, leading to a mismatch in PV systems and causing energy losses. For this purpose, differential power processing (DPP) converters are the emerging power electronic-based topologies used to address the mismatch issues. Normally, PV modules are connected in series and DPP converters are used to extract the power from these PV modules by only processing the fraction of power called mismatched power. In this work, a switched-capacitor-inductor (SCL)-based DPP converter is presented, which mitigates the non-ideal conditions in solar PV systems. A proposed SCL-based DPP technique utilizes a simple control strategy to extract the maximum power from the partially shaded PV modules by only processing a fraction of the power. Furthermore, an operational principle and loss analysis for the proposed converter is presented. The proposed topology is examined and compared with the traditional bypass diode technique through simulations and experimental tests. The efficiency of the proposed DPP is validated by the experiment and simulation. The results demonstrate the performance in terms of higher energy yield without bypassing the low-producing PV module by using a simple control. The results indicate that achieved efficiency is higher than 98% under severe mismatch (higher than 50%).

scholarly journals A review of challenges and benefits of integration of CHP plant into the grid: a case study in Serbia

2021 ◽  
Author(s):  
Rade M. Ciric ◽  
Sasa N. Mandic
Keyword(s):  
Energy Efficiency ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Increase Energy Efficiency ◽  
High Voltage Supply ◽  
The Republic ◽  
Technical Solutions ◽  
The Impact

AbstractThe Republic of Serbia must make significant efforts to promote and exploit renewable energy sources and increase energy efficiency in all energy sectors to ensure energy security and economic competitiveness, reduce the negative impact on the environment from energy production and use, and contribute to global efforts to reduce greenhouse gases. Within the paper several issues of integration of recently realized CHP plant are introduced and discussed. Firstly, the legal and energy policy issues in the Republic of Serbia regarding connecting CHP to the grid are presented. The challenges and technical solutions for CHP connection to the grid, as well as power quality issues and the role of the CHP plant during the restoration of power supply during the maintenance of the substation and unplanned loss of high voltage supply, are presented and discussed. Finally, the impact of prospective massive integration of CHP on the energy balance and CO2 emission reduction in the province of Vojvodina in Serbia is investigated and discussed. Since it is the first CHP plant realized in Serbia, it is crucial that experience be shared to all potential stakeholders in the future energy efficiency projects.

scholarly journals Methodology for assessing the environmental characteristics of various methods of generating electricity

2019 ◽  
Vol 140 ◽  
pp. 09001 ◽  
Author(s):  
Ekaterina Gryznova ◽  
Vadim Davydov ◽  
Yuri Batov ◽  
Valentin Dudkin ◽  
Danila Puz’ko ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Performance Indicators ◽  
Environmental Performance ◽  
Energy Production ◽  
Negative Impact ◽  
Environmental Efficiency ◽  
Electricity Production ◽  
Environmental Characteristics ◽  
Research Results ◽  
Advantages And Disadvantages

The article considers the energy efficiency of energy production from various types of fuel. The analysis of the negative impact of the use of various types of fuel on the environment. The most significant indicators for assessing the environmental efficiency of the use of fuel for electricity production are established. A comparison is made with the performance indicators that are currently used. The advantages and disadvantages are established. The necessity of developing a more effective methodology for assessing environmental performance is substantiated. A new methodology for assessing the environmental efficiency of using various methods for the production of electricity is proposed. Research results are presented.

scholarly journals Improving Flexibility and Energy Efficiency of Post-Combustion CO2 Capture Plants Using Economic Model Predictive Control

Processes ◽  
2018 ◽  
Vol 6 (9) ◽  
pp. 135 ◽  
Author(s):  
Benjamin Decardi-Nelson ◽  
Su Liu ◽  
Jinfeng Liu
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Model Predictive Control ◽  
Predictive Control ◽  
Economic Performance ◽  
Economic Model ◽  
Power Plants ◽  
Gas Flow ◽  
Renewable Energy Sources ◽  
Economic Model Predictive Control

To reduce CO 2 emissions from power plants, electricity companies have diversified their generation sources. Fossil fuels, however, still remain an integral energy generation source as they are more reliable compared to the renewable energy sources. This diversification as well as changing electricity demand could hinder effective economical operation of an amine-based post-combustion CO 2 capture (PCC) plant attached to the power plant to reduce CO 2 emissions. This is as a result of large fluctuations in the flue gas flow rate and unavailability of steam from the power plant. To tackle this problem, efficient control algorithms are necessary. In this work, tracking and economic model predictive controllers are applied to a PCC plant and their economic performance is compared under different scenarios. The results show that economic model predictive control has a potential to improve the economic performance and energy efficiency of the amine-based PCC process up to 6% and 7%, respectively, over conventional model predictive control.

An Energy Ontology Focusing on Demand Side Management in Smart Homes

2016 ◽  
Vol 19 ◽  
pp. 124-131
Author(s):  
Beate Naser ◽  
Franziska Schäfer ◽  
Jörg Franke
Keyword(s):  
Energy Production ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Electric Energy ◽  
Smart Homes ◽  
Demand Side Management ◽  
Demand Side ◽  
Conceptual Foundation ◽  
Available Energy ◽  
Solar Power Plants

By increasing the share of renewable energy sources, the volatility of available energy is rising. More and more fluctuating power generation by solar power plants and wind turbines has to be integrated into the power grid. Demand side management (DSM) represents one possible solution to achieve this goal by including energy production and energy consumption simultaneously. In this paper, we especially focus on the field of electric energy in smart homes. Considering the implementation of different DSM devices, an ontology-based approach can serve as a conceptual foundation for a necessary knowledge base. We propose an advanced energy ontology for smart homes, integrating important aspects for a successful DSM. We describe how power producers, storages and consumers are represented in our ontology. Finally, we show the scenario-based utilization of our approach.

scholarly journals APPLICATION OF DESIGN APPROACH TO IMPLEMENTATION OF ENERGY EFFICIENT TECHNOLOGIES

2020 ◽  
pp. 290-295
Author(s):  
A. Yevdokymova ◽  
A. Dehtiarenko ◽  
N. Petrenko
Keyword(s):  
Power Systems ◽  
Energy Efficient ◽  
Energy Production ◽  
Alternative Energy ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Power Grids ◽  
Electrical Networks ◽  
Energy Network

The paper analyzes the peculiarities of the development of the energy sector in Ukraine, as well as in European countries. Existing approaches to energy production are shown. The situation in Ukraine has changed in recent years. Energy production has shifted from centralized to distributed. The emergence of new types of power plants has made it possible to connect to the grid in places where it was previously impossible, a large number of consumers already have their own power units. Therefore, managing the energy network is becoming increasingly complex and therefore requires new approaches. The normative and legislative beginning of the active development of alternative energy in Ukraine already exists, and European and world experience should help Ukraine achieve energy independence and high environmental standards. Existing problems in the development of power grids arise due to the intensive growth of production and consumption of electricity, while the management of power systems is complicated by the growing share of distributed and renewable energy sources with changing production schedule. Improved controllability of electrical networks allows to prevent emergencies by load control programs, division of the network into autonomous zones, etc. Investment is a crucial factor in creating a flexible and efficient power grid based on innovative technical solutions. Implementation of energy efficiency projects is a guideline for improving the intelligent level of the energy system, which will allow energy companies to manage the energy network as a single system, increase profitability, reliability and uninterrupted, reduce technical and commercial losses, improve network management and efficiency. An important role is played by the interaction of all stakeholders in projects - the state, production, energy and energy sales companies, consumers and equipment manufacturers. Thus, the international experience in the transmission and distribution of electricity creates opportunities for successfully implementing projects for the introduction of energy-efficient technologies in our Ukraine.

scholarly journals Interpretation of MPPT Techniques in Grid Connected Solar PV Array System

IJOSTHE ◽  
2019 ◽  
Vol 5 (6) ◽  
pp. 5
Author(s):  
Neha Singh ◽  
Prof. Govind Prasad Pandiya
Keyword(s):  
Renewable Energy Sources ◽  
Maximum Efficiency ◽  
Energy Sources ◽  
Solar Pv ◽  
Pv System ◽  
Partial Shading ◽  
System Architectures ◽  
Pv Systems ◽  
Pv Array ◽  
Uniform Condition

Solar energy is one of the most used and readily available renewable energy sources among the other energy sources. The power generated by PV systems is dependent on solar irradiance and temperature parameters. In the literature, many researchers and studies are interested in estimating true maximum efficiency point for the PV systems. Due to that fact, MPPT applications and techniques become an important issue for PV systems under both uniform and non uniform conditions. Although, PV system under uniform environment has only one maxima point on P-V curve which is simple to estimate correctly by conventional MPPT techniques, it is not as simple as under non-uniform condition such as partial shading and mismatch effects. To overcome the drawbacks of the conventional MPPTs under non uniform condition, researchers has been investigated new soft computing MPPTs, PV array configurations, system architectures and topologies.

Socio-environmental and Economic Problems of Solar Panels Recycling

2020 ◽  
pp. 48-55
Author(s):  
Olena I. Matsenko ◽  
Vladyslav S. Tereshchenko ◽  
Vladyslav S. Piven ◽  
Andrii A. Panchenko ◽  
Evhenyi A. Perekhod
Keyword(s):  
Renewable Energy ◽  
Alternative Energy ◽  
Power Plants ◽  
Solar Power ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Economic Problem ◽  
Energy Sources ◽  
Solar Power Plants ◽  
Technical Specifications

The use of alternative energy sources, in particular solar energy, has gained rapid growth in recent years. This trend is prompting manufacturers of equipment for solar power plants to increase production volumes. At the same time, the question arises of the disposal of used modules, because each material has its service life. According to technical specifications, the average life of solar modules and batteries is 25-30 years. Decommissioning may occur earlier than this time due to the following reasons – moral and physical deterioration, mechanical damage, replacement of obsolete equipment with new, modernization of solar power plants. Already in 2030, it will be necessary to replace the solar modules installed in 2000. Therefore, there are acute questions not only regarding the development of technologies for processing waste equipment from solar power plants but also organizational and economic methods. This article discusses the main problems that arise during the utilization and recycling of solar modules, analyzes the experience of countries in resolving these issues. After all, the use of renewable energy sources should minimize the negative impact on the environment from energy production at all stages – from the production of equipment for a power plant to the disposal and recycling of this equipment. Keywords: solar panel, recycling, economic method, solar power, natural resource, economic problem, environment, renewable energy.

scholarly journals Experimental Tests and Modeling on a Combined Heat and Power Biomass Plant

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2615 ◽  
Author(s):  
Guido Marseglia ◽  
Carlo Maria Medaglia ◽  
Alessandro Petrozzi ◽  
Andrea Nicolini ◽  
Franco Cotana ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Production ◽  
Renewable Energy Sources ◽  
Experimental Tests ◽  
Biomass Energy ◽  
Production Plant ◽  
The Sustainable Development ◽  
Development Goals ◽  
Energy Production System ◽  
Biomass Plant

Renewable energy sources can help the countries to achieve some of the Sustainable Development Goals (SDGs) provided from the recent 2030 Agenda, allowing for clean, secure, reliable and affordable energy. Biomass technology is a relevant renewable energy to contribute to reach a clean and affordable energy production system with important emissions reduction of greenhouse gases (GHG). An innovative technological application of biomass energy consisting of a burner coupled with an external fired gas turbine (EFGT) has been developed for the production of electricity. This paper shows the results of the plant modelling by Aspen Plus environment and preliminary experimental tests; the validation of the proposed model allows for the main parameters to be defined that regulate the energy production plant supplied by woodchips.

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