scholarly journals Analysis of Performance and Control of DC Microgrids as Electricity Providers for Renewable Energy

2021 ◽  
Vol 317 ◽  
pp. 04032
Author(s):  
Denis ◽  
Enda Wista Sinuraya ◽  
Jaka Windarta ◽  
Yosua Alvin Adi Soetrisno ◽  
Kurnianto Fernanda
Keyword(s):  
Distributed Generation ◽  
Fossil Fuels ◽  
Service Providers ◽  
Electric Energy ◽  
Electrical Energy ◽  
System Stability ◽  
Small Scale ◽  
Distributed Generators ◽  
Drastic Increase ◽  
And Control

The increase in demand for electrical energy is increasing rapidly, in line with economic growth. In developing the electricity system, electrical energy service providers must provide electrical energy according to demand with good quality. The generation of conventional electric energy systems that use fossil fuels faces depleting fossil fuel sources, poor efficiency, and environmental pollution. This technology is known as Distributed Generation (DG). Distributed Generation (DG) or Micro Grid (MG) is a small-scale power plant located close to the load. The use of distributed generators can improve the entire system's efficiency, reduce transmission losses, reduce pollution, and ensure the continuity of the distribution of electrical energy. However, the drastic increase in the use of DG causes problems in the form of voltage and frequency stability which will be disturbed due to rapid changes in the generation and loading rates. If this is left unchecked, it can harm system security and reliability. A proper control strategy will restore system stability in the event of an imbalance.

scholarly journals Environmentally Friendly Electric Energy Development Model

2021 ◽  
Vol 8 (7) ◽  
pp. 303
Author(s):  
Ahmad Hermawan ◽  
Abdul Hakim ◽  
Marjono Marjono ◽  
Bambang Semedi
Keyword(s):  
Energy Management ◽  
Management System ◽  
Structural Equation ◽  
Fossil Fuels ◽  
Electric Energy ◽  
Environmentally Friendly ◽  
Electrical Energy ◽  
Energy Development ◽  
Equation Modeling ◽  
Energy Management System

The increased production of electrical energy will lead to an increase on the use of fossil fuels which ultimately raise the Greenhouse Gas (GHG) emissions. The use of fossil fuels (non-renewable fuels) for large-scaled generation of electrical energy will certainly cause problems considering oil and coal reserves as the main source for PLTU will shrink and run out over time. In addition, several environmental problems need to be considered and studied regarding this condition. Thus, it is very important to efficiently use electrical energy according to Presidential Instruction No. 6 of 2014 concerning energy development which focused on sub-sectors electricity development and minimization of fossil energy use as well as development of new, renewable, and converted energies. Based on this, a system which can support energy saving is needed. A system used for regulating energy needs is called the Energy Management System (EMS). The study was conducted in the Malang State Polytechnic Campus which is located on Jalan Soekarno Hatta no. 9, Jatimulyo, Lowokwaru Sub-district, Malang City. The sample used in this study consists of 230 people, including 150 students, 30 lecturers and 50 academics. This study is purposed to examine the correlation of the four variables to the energy management system and the use of environmentally friendly energy. Thus, the most appropriate model to accommodate this requirement is Structural Equation Modeling (SEM). The results of SEM analysis showed that the model of an environmentally friendly electric energy management is said to be feasible to be developed, thus it can be collectively adapted in all aspects for creating a green campus.

scholarly journals An experimental investigation into a novel small-scale device for energy harvesting using vortex-induced vibration

2020 ◽  
Author(s):  
Farshad Moradi Gharghani ◽  
Mohamad Ali Bijarchi ◽  
Omid Mohammadi ◽  
Mohammad Behshad Shafii
Keyword(s):  
Wind Energy ◽  
Large Scale ◽  
Fossil Fuels ◽  
Energy Harvester ◽  
Electrical Energy ◽  
Small Scale ◽  
Comprehensive Investigation ◽  
Vortex Induced Vibration ◽  
Geometrical Shapes ◽  
Oscillating Plate

Abstract Renewable energies could be a good solution to the problems associated with fossil fuels. The storage of wind energy by means of small-scale devices rather than large-scale turbines is a topic that has gained lots of interest. In this study, a compact device is proposed to harvest wind energy and transform it into electrical energy, by means of oscillations of a magnet into a coil, using the concept of vortex-induced vibration (VIV) behind a barrier. For a more comprehensive investigation, this system is studied from two viewpoints of fluid mechanics (without magnet) and power generation (with the magnet). For this purpose, an oscillating plate hinging on one side and three barriers with different geometrical shapes including cylindrical, triangular and rectangular barriers are used. In addition to the effect of barrier geometry, the impacts of various barriers dimensions, the distance between the plate and the barriers as well as inclination angle of the plate with respect to the horizon on the amplitude of oscillations and generated power are investigated. Results showed that in each case, there is a unique Reynolds number in which the frequency of vortex shedding equals to the frequency of plate oscillation and the output power from the energy harvester device is maximum. Besides, by increasing the barrier dimensions, the amplitude of oscillations increases up to three times, which leads to a higher generated power. Finally, by considering the studied parameters, the best conditions for generating energy using the VIV method are presented for design purposes. Among all the considered cases, the cylindrical barrier with the highest diameter and nearest distance to the plate led to the highest efficiency (0.21%) in comparison with other barriers.

scholarly journals The implementation of small-scale hydropower stations in slow flow micro-rivers: a case study of Uzbekistan

2019 ◽  
Vol 135 ◽  
pp. 01036 ◽  
Author(s):  
Dilshod Kodirov ◽  
Obid Tursunov ◽  
Sevarakhon Parpieva ◽  
Nusratillo Toshpulatov ◽  
Kurash Kubyashev ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Experimental Studies ◽  
Electric Energy ◽  
Point Of View ◽  
Small Scale ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Independent Basis ◽  
Hydropower Stations

Electric energy production in small-scale hydropower stations is attractive from both an ecological and an economical point of view. Technological innovations and measures to lessen environmental impacts make small-scale hydropower stations inexpensive and justified energy sources that provide renewable energy on an independent basis and help not only to protect the environment but also to weaken human dependence on fossil fuels. This study is devoted to finding solutions based on renewable energy technologies and innovations in Uzbekistan. This article is devoted to the development of a water wheel experimental model for the micro-hydroelectric power station. Experimental studies were carried out on the basis of this model and obtained results were used in the preliminary calculations. The results from the calculations showed that the installation can generate 7-11 kWh of electricity per hour, about 168-264 kWh of electricity per day and 61 to 96 MWh of electricity per year.

scholarly journals Impact of Demand Response on Optimal Sizing of Distributed Generation and Customer Tariff

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 190
Author(s):  
Krishna Mohan Reddy Pothireddy ◽  
Sandeep Vuddanti ◽  
Surender Reddy Salkuti
Keyword(s):  
Energy Management ◽  
Distributed Generation ◽  
Demand Response ◽  
Distribution System ◽  
Fossil Fuels ◽  
Global Climate ◽  
Management Strategies ◽  
Communication Technologies ◽  
Load Demand ◽  
Drastic Increase

Due to the surge in load demand, the scarcity of fossil fuels, and increased concerns about global climate change, researchers have found distributed energy resources (DERs) to be alternatives to large conventional power generation. However, a drastic increase in the installation of distributed generation (DGs) increases the variability, volatility, and poor power quality issues in the microgrid (MG). To avoid prolonged outages in the distribution system, the implementation of energy management strategies (EMS) is necessary within the MG environment. The loads are allowed to participate in the energy management (EM) so as to reduce or shift their demands to non-peak hours such that the maximum peak in the system gets reduced. Therefore, this article addresses the complication of solutions, merits, and demerits that may be encountered in today’s power system and encompassed with demand response (DR) and its impacts in reducing the installation cost, the capital cost of DGs, and total electricity tariff. Moreover, the paper focuses on various communication technologies, load clustering techniques, and sizing methodologies presented.

Political-economic, social and environmental aspects of sugar cane biomass use for the electrical energy generation

2020 ◽  
Vol 13 (3) ◽  
pp. 77
Author(s):  
A. Areias
Keyword(s):  
Rural Communities ◽  
Environmental Impacts ◽  
Fossil Fuels ◽  
Nutrient Recycling ◽  
Electric Energy ◽  
Electrical Energy ◽  
Reduction Of Co2 ◽  
Agricultural Areas ◽  
Political Economic ◽  
The Impact

Energy produced through biomass, when produced in an efficient and sustainable way, generates a series of environmental, economic and social benefits when compared to the use of fossil fuels. Benefits such as better land management, job creation, efficient use of agricultural areas, provision of modern energy vectors to rural communities, reduction of CO2 emissions, waste control and nutrient recycling can be highlighted. This paper discusses the contributions of energy co-generation, from biomass, to the supplementation of electric energy, reduction of environmental impacts and generation of employment. The aim was to understand the impact of public policies to increase the efficiency of the sugar-energy sector and if there was an increase in employment and manpower in the field, as well as reduction of environmental impacts by reducing the consumption of other less renewable sources of energy within the State from São Paulo. In order to carry out this study, it was necessary to analyze the social, economic and agronomic indicators and the energy plans that aim at the development of the sector, such as the National Energy Plan and the Paulista Energy Plan.

scholarly journals The Application of Piezoelectric Sensor as Energy Harvester from Small-scale Hydropower

2018 ◽  
Vol 65 ◽  
pp. 05024
Author(s):  
Hidayatul Aini Zakaria ◽  
Chan Men Loon
Keyword(s):  
Renewable Energy ◽  
Water Waves ◽  
Fossil Fuels ◽  
Mechanical Energy ◽  
Renewable Energy Sources ◽  
Piezoelectric Sensor ◽  
Electrical Energy ◽  
Ocean Waves ◽  
Small Scale ◽  
Flowing Water

Renewable energy technology nowadays is advancing in research and application as an alternative for non-renewable energy sources including fossil fuels and coals since it is considerably less hazardous for the environment. In recent years, many studies to harvest energy from water energy including ocean waves and hydropower has been conducted. The inherent characteristic of the piezoelectric sensor which can convert mechanical energy to electrical energy has created an alternative to generate energy from renewable sources. The main aim of this research is to harvest energy from water movements which include self-generated water waves, automated water waves, flowing water and falling water. The piezoelectric sensor used in this research is a pressure-based piezoelectric sensor which means when there is a pressure exerted on the surface, it will generate electricity. A prototype was designed and simulated by Proteus software and the prototype was fabricated for energy harvesting from water movements. In this study, four methods had been used to harvest energy from small scale hydropower where two methods are from water waves generated from a hairdryer and ultrasonic cleaner and another two methods from falling water and flowing water. The results obtained shows that harvested energy from falling water gives the best results in which it has accumulated up to 13V in the same amount of time as compared to water waves and water flow.

scholarly journals RANCANG BANGUN SMART-HOME (APLIKASI INSTALASI PERANGKAT ENERGI ALTERNATIF SINAR MATAHARI DALAM DISAIN RUMAH TINGGAL)

MODUL ◽  
2018 ◽  
Vol 18 (1) ◽  
pp. 26
Author(s):  
Septana Bagus Pribadi ◽  
Eddy Prianto
Keyword(s):  
Power Plant ◽  
Smart Home ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Electric Energy ◽  
Electrical Energy ◽  
Solar Panels ◽  
Major Power ◽  
Hydro Power ◽  
Residential Design

The development of non-polluted renewable energy such as solar power, wind power, hydro power, sea wave power, growed rapidly in accordance with the technology developments in the recent decade.The electric energy from PLN (Indonesian Electricity Company) obtained from fuels processed through power plant converted into electrical energy. Generally, the use of electricity as a major power generator causes pollution, besides the price of fossil fuels tends to rise that make the increase in investment. One of abundantly alternative energy in Indonesia is solar radiation. The employing of of solar energy used solar panels (solar cell) convert sunlight into electrical energy directly. It easily employs in residencies commonly referred to Solar Home System.The synergistic home design which applies active design tools called Smart Home. As the development of a power plant has no synchronization with the residential design, this research purposes to observe and synchronize the installation of alternative energy device in residencies.The cooperation with PT ATMI Kreasi Energy was very advantageous for developing this subject matter from other perspectives in the future.

scholarly journals Design and Energy Requirements of a Photovoltaic-Thermal Powered Water Desalination Plant for the Middle East

2021 ◽  
Vol 18 (3) ◽  
pp. 1001
Author(s):  
Saeed Alqaed ◽  
Jawed Mustafa ◽  
Fahad Awjah Almehmadi
Keyword(s):  
Renewable Energy ◽  
Middle East ◽  
Fossil Fuels ◽  
Minimum Cost ◽  
Electrical Energy ◽  
Water Desalination ◽  
Small Scale ◽  
Remote Community ◽  
East Region ◽  
Middle East Region

Seawater or brackish water desalination is largely powered by fossil fuels, raising concerns about greenhouse gas emissions, particularly in the arid Middle East region. Many steps have been taken to implement solar resources to this issue; however, all attempts for all processing were concentrated on solar to electric conversion. To address these challenges, a small-scale reverse-osmosis (RO) desalination system that is in part powered by hybrid photovoltaic/thermal (PVT) solar collectors appropriate for a remote community in the Kingdom of Saudi Arabia (KSA) was designed and its power requirements calculated. This system provides both electricity to the pumps and low-temperature thermal energy to pre-heat the feedwater to reduce its viscosity, and thus to reduce the required pumping energy for the RO process and for transporting the feedwater. Results show that both thermal and electrical energy storage, along with conventional backup power, is necessary to operate the RO continuously and utilize all of the renewable energy collected by the PVT. A cost-optimal sizing of the PVT system is developed. It displays for a specific case that the hybrid PVT RO system employs 70% renewable energy while delivering desalinized water for a cost that is 18% less than the annual cost for driving the plant with 100% conventional electricity and no pre-heating of the feedwater. The design allows for the sizing of the components to achieve minimum cost at any desired level of renewable energy penetration.

Sign in / Sign up

Export Citation Format

Share Document