Options For Adaptation Of The Biogas Sector To Serve Evolving Electricity Grids

2015 ◽  
pp. 565-592
Keyword(s):  
Electricity Grids

scholarly journals Can Blockchain Strengthen the Energy Internet?

Network ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 95-115
Author(s):  
Charithri Yapa ◽  
Chamitha de Alwis ◽  
Madhusanka Liyanage
Keyword(s):  
Distributed Generation ◽  
Paradigm Shift ◽  
Distribution Networks ◽  
Future Research ◽  
Disruptive Technology ◽  
Electricity Distribution ◽  
Energy Internet ◽  
Energy Delivery ◽  
Electricity Grids

Emergence of the Energy Internet (EI) demands restructuring of traditional electricity grids to integrate heterogeneous energy sources, distribution network management with grid intelligence and big data management. This paradigm shift is considered to be a breakthrough in the energy industry towards facilitating autonomous and decentralized grid operations while maximizing the utilization of Distributed Generation (DG). Blockchain has been identified as a disruptive technology enabler for the realization of EI to facilitate reliable, self-operated energy delivery. In this paper, we highlight six key directions towards utilizing blockchain capabilities to realize the envisaged EI. We elaborate the challenges in each direction and highlight the role of blockchain in addressing them. Furthermore, we summarize the future research directive in achieving fully autonomous and decentralized electricity distribution networks, which will be known as Energy Internet.

scholarly journals Economic Feasibility of Energy Supply by Small Modular Nuclear Reactors on Small Islands: Case Studies of Jeju, Tasmania and Tenerife

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2587 ◽  
Author(s):  
Sanghyun Hong ◽  
Barry Brook
Keyword(s):  
Energy Demand ◽  
Nuclear Reactors ◽  
High Energy ◽  
Economic Feasibility ◽  
System Level ◽  
Small Island ◽  
Small Islands ◽  
Hydroelectric Power ◽  
Generation Cost ◽  
Electricity Grids

Small modular nuclear reactors (SMRs) offer the promise of providing carbon-free electricity and heat to small islands or isolated electricity grids. However, the economic feasibility of SMRs is highly system-dependent and has not been studied in this context. We selected three case-study islands for such an evaluation: Jeju, Tasmania and Tenerife based on their system complexity. We generated 100,000 electricity-mix cases stochastically for each island and examined the system-level generation-cost changes by incrementing the average generation cost of SMRs from USD$60 to 200 MWh−1. SMRs were found to be economically viable when average generation cost was <$100 MWh−1 for Jeju and <$140 MWh−1 for Tenerife. For Tasmania the situation was complex; hydroelectric power is an established competitor, but SMRs might be complementary in a future “battery of the nation” scenario where most of the island’s hydro capacity was exported to meet peak power demand on the mainland grid. The higher average generation cost of SMRs makes it difficult for them to compete economically with a fossil fuel/renewable mix in many contexts. However, we have demonstrated that SMRs can be an economically viable carbon-free option for a small island with a limited land area and high energy demand.

scholarly journals SOLAR 1.1: DEVELOPMENT OF SOFTWARE FOR SELECTING COMMERCIALLY AVAILABLE PHOTOVOLTAIC PANELS, INCLUDING THE ECONOMIC ANALYSIS

2009 ◽  
Vol 8 (2) ◽  
pp. 21
Author(s):  
P. Laranci ◽  
J. L. Silveira ◽  
W. Q. Lamas
Keyword(s):  
Developing Countries ◽  
Interest Rate ◽  
Economic Analysis ◽  
Electric Energy ◽  
Photovoltaic System ◽  
Photovoltaic Panels ◽  
Subsidy Rate ◽  
Electricity Cost ◽  
Electricity Grids ◽  
The Interest Rate

Photovoltaic energy represents an opportunity to produce electricity in a clean manner. It can be applied in all world places, in particular in the developing countries, where there are places where electricity grids are unreliable or non-existent and is inconvenient to make investments in a grids expansion. In remote locations photovoltaic power supplies often the most economic and cleaner option to produce electric energy. In addition, many developing countries have high radiation levels year round because of their latitude. The software SOLAR 1.1 was developed with purpose of helping the choice of photovoltaic panels available commercially including electric needs calculation for the installation. This new version of program also help to conduce the economic analysis for grid connected or stand alone photovoltaic systems for the choice of convenient values of interest rate and payback period. In this version of the software is possible to select the language among English, Italian and Portuguese. The software choices the panels in its archive that contains more of 250 types of photovoltaic modules made by 35 producers. The selection provides as output three modules, the cheapest for each cell type: monocrystalline, multicrystalline and amorphous. The software archive can be updated adding new item or editing the inserted items. The economic analysis can be operated by SOLAR 1.1 in each of the chosen panels. This analysis gives as output all the values of the costs in the photovoltaic system and the diagrams with the electricity cost and the expected annual saving trend with variation of the amortisation period and for different values of the interest rate and the governmental subsidy rate.

scholarly journals Assessing the Risk to Indoor Thermal Environments on Industrial Sites Offering AHU Capacity for Demand Response

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6261
Author(s):  
Alexander Brem ◽  
Ken Bruton ◽  
Paul D. O’Sullivan
Keyword(s):  
Demand Response ◽  
Response Times ◽  
Industrial Sector ◽  
Industrial Building ◽  
Factors Affecting ◽  
Ambient Temperatures ◽  
Thermal Environments ◽  
Industrial Sites ◽  
Electricity Grids

Increasing participation in demand response within the industrial sector may be crucial to growing the levels of available flexible capacity required to reliably control national electricity grids as renewable generation increases to satisfy emission targets. This research aims to assist the uptake of demand response in the industrial sector by investigating risk to indoor thermal environments on industrial sites offering air handling unit capacity for demand response. This evaluation uses a systematic model-based approach, calibrated and validated with empirical data from a relevant case study industrial building to assess risk through a number of scenarios. The conditions investigated cover several relevant grid response times and durations, and national and international extreme external ambient temperatures in the past, present and future under a variety of temperature limits. The study demonstrated that there is very low risk to the case study site participating in demand response, with only 15 of 264 initial and 284 of 936 total scenarios triggering any risk. The major factors affecting risk levels identified were more stringent temperature limits and the influence of more extreme climates. The development and implementation of this concept has considerable potential to benefit industrial participants and the wider national electricity grids.

scholarly journals Development Effects of Electrification: Evidence from the Topographic Placement of Hydropower Plants in Brazil

2013 ◽  
Vol 5 (2) ◽  
pp. 200-231 ◽  
Author(s):  
Molly Lipscomb ◽  
A. Mushfiq Mobarak ◽  
Tania Barham
Keyword(s):  
Time Series ◽  
General Equilibrium ◽  
Labor Productivity ◽  
Positive Effects ◽  
Hydropower Plants ◽  
Electricity Grids ◽  
Infrastructure Investments

We estimate the development effects of electrification across Brazil over the period 1960–2000. We simulate a time series of hypothetical electricity grids for Brazil for the period 1960–2000 that show how the grid would have evolved had infrastructure investments been made based solely on geography-based cost considerations. Using the model as an instrument, we document large positive effects of electrification on development that are underestimated when one fails to account for endogenous targeting. Broad-based improvement in labor productivity across sectors and regions rather than general equilibrium re-sorting appears to be the likely mechanism by which these development gains are realized. (JEL H54, L94, O11, O13, Q41, Q43)

scholarly journals ASYMMETRICAL SIX-PHASE SPACE VECTOR PWM SCHEME / ASIMETRINIS ERDVINIO VEKTORIAUS MODULIAVIMO METODAS ŠEŠIŲ FAZIŲ ĮTAMPAI FORMUOTI

2014 ◽  
Vol 6 (2) ◽  
pp. 168-171 ◽  
Author(s):  
Tadas Lipinskis
Keyword(s):  
Modulation Scheme ◽  
Motor Speed ◽  
Space Vector ◽  
Matlab Simulink ◽  
Stator Windings ◽  
Simulink Simulation ◽  
Three Phase ◽  
Electricity Grids ◽  
Torque Pulsations ◽  
Vector Modulation

Multiphase electric motors have smaller torque pulsations and are more reliable that their three-phase alternatives. However, standard electricity grids around the world are three-phase, so power inverter is needed to drive multiphase motors. Inverter is used not only to power the motor, but also to control the am­plitude and frequency of the produced voltage, thus controlling motor speed and torque. Multiphase systems with odd number of phases have been widely investigated; therefore, this paper focuses on a six-phase inverter with a single neutral symmetrical load. A novel asymmetrical space vector modulation scheme is proposed and evaluated using simulations in Matlab/Simulink. Simulation results are compared to other modulation schemes. The proposed method is suitable for generating near-sinusoidal output voltages; however, it might not be suited for driving motors with sinusoidally distributed stator windings. Daugiafaziai elektros varikliai turi mažesnes sukimo momento pulsacijas ir didesnį patikimumą, lyginant su trifaziais varikliais. Pasaulyje paplitę trijų fazių elektros tinklai, todėl daugiafaziams varikliams maitinti reikalingi dažnio keitikliai, keičiantys standartinę vienfazę arba trifazę tinklo įtampą į daugiafazę. Dažnio keitiklis keičia ir išėjimo įtampos amplitudę, ir dažnį. Tai sudaro galimybių tiksliai valdyti variklio greitį. Literatūroje plačiai išnagrinėti daugiafazės įtampos formavimo metodai, esant nelyginiam fazių skaičiui. Darbe siūlomas naujas erdvinių vektorių asimetrinis įtampos formavimo algoritmas šešių fazių dažnio keitikliui, apkrautam simetrine apkrova su viena neutrale. Algoritmas tiriamas Matlab / Simulink programa, rezultatai palyginami su gautais, taikant kitus šešiafazės įtampos formavimo metodus.

Wildfires Down Under: Impacts and Mitigation Strategies for Australian Electricity Grids

2022 ◽  
Vol 20 (1) ◽  
pp. 52-63
Author(s):  
Dean Sharafi ◽  
Andrew Dowdy ◽  
Judith Landsberg ◽  
Phillip Bryant ◽  
Dene Ward ◽  
...  
Keyword(s):  
Mitigation Strategies ◽  
Electricity Grids
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