scholarly journals Development of a simulation platform of all-electric aircraft on-board systems for energy management studies

2017 ◽  
Vol 121 (1239) ◽  
pp. 710-719 ◽  
Author(s):  
F. Schettini ◽  
E. Denti ◽  
G. Di Rito
Keyword(s):  
Power Systems ◽  
Energy Management ◽  
Electrical Power ◽  
Electrical Energy ◽  
Simulation Platform ◽  
Technology Initiative ◽  
Hydraulic Power ◽  
Simulink Simulation ◽  
Electric Aircraft

ABSTRACTThis paper deals with the development of a simulation platform for the dynamic analysis of systems characterised by different physical domains. The research has been carried out in the context of the EC-funded Clean Sky Joint Technology Initiative (Green Regional Aircraft/All-Electric Aircraft domain). In particular, the objective of the research is focused on the on-board systems of new All-Electric Aircraft, where a crucial design point is related to the electrical energy management. In the “all-electric” concept, where pneumatic and hydraulic power systems are eliminated to improve aviation costs and environmental impact, the dynamics of electrical power absorptions is to be characterised and managed to avoid excessive peaks with respect to generators capabilities. The paper describes the architecture of a Matlab/Simulink simulation platform developed in order to design and validate of the electrical energy management logics, which lead up to 32% reduction of the maximum power request for the case study considered. Thanks to an approach based on a mixing of co-simulation and S-function compiling, the platform integrates models coming from different environments (AMESim, Dymola/Modelica), and developed by various partners/specialists.

scholarly journals Optimal energy management for hybrid-electric aircraft

2020 ◽  
Vol 92 (6) ◽  
pp. 851-861 ◽  
Author(s):  
José Pedro Soares Pinto Leite ◽  
Mark Voskuijl
Keyword(s):  
Power Systems ◽  
Energy Management ◽  
Gas Turbines ◽  
Weight System ◽  
Content Type ◽  
Optimal Energy ◽  
Variable Weight ◽  
Electric Aircraft ◽  
Optimal Energy Management ◽  
Hybrid Electric

Purpose In recent years, increased awareness on global warming effects led to a renewed interest in all kinds of green technologies. Among them, some attention has been devoted to hybrid-electric aircraft – aircraft where the propulsion system contains power systems driven by electricity and power systems driven by hydrocarbon-based fuel. Examples of these systems include electric motors and gas turbines, respectively. Despite the fact that several research groups have tried to design such aircraft, in a way, it can actually save fuel with respect to conventional designs, the results hardly approach the required fuel savings to justify a new design. One possible path to improve these designs is to optimize the onboard energy management, in other words, when to use fuel and when to use stored electricity during a mission. The purpose of this paper is to address the topic of energy management applied to hybrid-electric aircraft, including its relevance for the conceptual design of aircraft and present a practical example of optimal energy management. Design/methodology/approach To address this problem the dynamic programming (DP) method for optimal control problems was used and, together with an aircraft performance model, an optimal energy management was obtained for a given aircraft flying a given trajectory. Findings The results show how the energy onboard a hybrid fuel-battery aircraft can be optimally managed during the mission. The optimal results were compared with non-optimal result, and small differences were found. A large sensitivity of the results to the battery charging efficiency was also found. Originality/value The novelty of this work comes from the application of DP for energy management to a variable weight system which includes energy recovery via a propeller.

Investigation and Optimization of Power Based Smart Home Module Integrated with Automatic Solar Tracking System and MPPT Technique

2019 ◽  
Vol 889 ◽  
pp. 526-532
Author(s):  
Thai Viet Dang ◽  
Si Thong Dinh ◽  
Xuan Toi Bui
Keyword(s):  
Solar Cell ◽  
Solar Energy ◽  
Power Consumption ◽  
Power Systems ◽  
Tracking System ◽  
Electrical Power ◽  
Research Result ◽  
Electrical Energy ◽  
Cell System ◽  
Power Sources

Currently, the world has a lot of research and practical application of intelligent building systems integrated with intelligent power systems. Because Vietnam is a country with potential for solar energy, the integrator of solar energy is being strongly developed. However, the research result of the optimization of electrical energy used by the intelligent type solar integration is rare. This paper presents the design and structure of the module of intelligent control and monitoring via wireless network integrated with the automatic solar concentration system. The system allows easy connection and operation of all electrical power sources including the dispersal solar power to ensure the efficient and lower power consumption. In addition, the solar cell system is applied the Maximum Power Point Tracking technique (MPPT), which helps to stabilize and improve the power generation efficiency of the PV panels. The test results on the module showed absorption performance of automatic solar-cell flat plate systems is raised by 20-30% and power consumption in small households reduced approximately 30%.

scholarly journals Integrating Greenhouse Gas Emissions Costs in Lifecycle Loss Evaluations: A Case Study for Transmission Lines

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Antonis L. Lazari ◽  
Charalambos A. Charalambous
Keyword(s):  
Power Systems ◽  
Transmission Line ◽  
Transmission Lines ◽  
Evaluation Method ◽  
Energy Savings ◽  
Electrical Energy ◽  
Low Loss ◽  
Enhanced Transmission ◽  
Investment Volume

Considering the investment volume in the electrical energy infrastructure and the increasing awareness for global warming and climate change, this paper aims to deliver an enhanced transmission line losses evaluation method that integrates true environment financial figures. The enormous volume of transmission lines utilized in power systems across the world provides a considerable potential for energy savings by adopting the idea of “energy-efficient transmission lines.” In this paper the total owning cost (TOC) formula with built-in environmental components is used to assess the relative economic benefit of a high-first-cost, low-loss transmission line unit versus one with a lower first cost and higher losses. The proposed methodology is applied on the Cyprus Power System, by incorporating true financial data and system characteristics.

scholarly journals Electrical power supply consumption in education sector and energy audit: Case study of University of Jos

2021 ◽  
Vol 40 (2) ◽  
pp. 321-328
Author(s):  
B.I. Gwaivangmin
Keyword(s):  
Electrical Power ◽  
Electrical Energy ◽  
Electricity Supply ◽  
Energy Audit ◽  
Demand Forecast ◽  
Generating Sets ◽  
Load Demand ◽  
The Cost ◽  
The University

Electricity supply has been identified as the key constraint to industrialization and economic development in Nigeria. The unbundling of the power sector was aimed at boosting electricity supply, this effort has yielded some appreciable results, but not very significant. As a result of the low power generation and distribution, Nigeria’s federal government is working towards solving the prevailing problems of inadequate power in some key sectors by building power generating plants in some of the institutions of learning in the country. This paper looks at the determinants of electrical energy consumption and electrical energy audit, a case study of the University of Jos. The load profiles demand survey, load demand forecast and other important factors were investigated. The result revealed that there is available power of 22–23 hours from the national grid and the balance 1–2 hours of power is supplied by the generating sets, good savings in the cost of diesel and maintenance. An annual excess of 2,199,900 kWH is enjoyed by the university over the national per capita power consumption.

scholarly journals MATLAB/SIMULINK Simulation Tool for Power Systems

2011 ◽  
pp. 140-145
Author(s):  
Santosh B. Kulkarni ◽  
Rajan H. Chile
Keyword(s):  
Power Systems ◽  
Modeling And Simulation ◽  
Test System ◽  
Simulation Tool ◽  
Matlab Simulink ◽  
Simulink Simulation ◽  
Systems Simulation ◽  
User Friendly

This paper describes the modeling and simulation library for power systems simulation under SIMULINK environment. The different features of MATLAB Toolboxes used in the analysis of power systems are described. Software introduces SIMULINK environment of MATLAB for implementing user friendly and future expansion. To illustrate the capabilities of SIMULINK simulation tool, a case study based on a test system is presented.

Unsettled Issues Regarding the Certification of Electric Aircraft

2021 ◽  
Author(s):  
Anna Mracek Dietrich ◽  
◽  
Ravi Rajamani ◽  
Keyword(s):  
Power Systems ◽  
Aerospace Industry ◽  
Electrical Energy ◽  
Regulatory Agencies ◽  
Special Importance ◽  
Regulatory Requirements ◽  
Development Organizations ◽  
Electric Aircraft ◽  
Rule Changes ◽  
Technical Safety

The aerospace industry is beginning to grapple with the reality of certifying electric aircraft (EA), signaling the maturing of the field. Many players are ramping up their activities to respond to imminent technical, safety, and regulatory requirements. While there are gaps in EA knowledge as well as the processes for certifying them, some leading standards development organizations (SDOs) such as SAE International, ASTM International, and RTCA—ably supported by representatives from regulatory agencies—are stepping in to address many of these issues. Of special importance are the new rule changes in the normal category (14 CFR Part 23, Amendment 64) that shift from a prescriptive philosophy to “performance-based rules.” Regarding system knowledge, there has been a trend in the use electrical energy to power systems that have long employed mechanical hydraulics. In the new EA paradigm, these components will be employed at criticality levels not previously witnessed in conventional aircraft, calling for a specific set of certification demands. Unsettled Issues Regarding the Certification of Electric Aircraft tackles the certification challenges faced by EA manufacturers in both the small (normal) and large (transport) categories, addressing technical, business, and process issues.

scholarly journals Active Distribution Network Modeling for Enhancing Sustainable Power System Performance; a Case Study in Egypt

2020 ◽  
Vol 12 (21) ◽  
pp. 8991
Author(s):  
Ali A. Radwan ◽  
Ahmed A. Zaki Diab ◽  
Abo-Hashima M. Elsayed ◽  
Hassan Haes Alhelou ◽  
Pierluigi Siano
Keyword(s):  
Power Systems ◽  
Electricity Market ◽  
System Performance ◽  
Power Flow ◽  
Electrical Power ◽  
Distribution Network ◽  
Distribution Networks ◽  
Western Desert ◽  
Distribution Transformers

The remarkable growth of distributed generation (DG) penetration inside electrical power systems turns the familiar passive distribution networks (PDNs) into active distribution networks (ADNs). Based on the backward/forward sweep method (BFS), a new power-flow algorithm was developed in this paper. The algorithm is flexible to handle the bidirectional flow of power that characterizes the modern ADNs. Models of the commonly used distribution network components were integrated with the developed algorithm to form a comprehensive tool. This tool is valid for modeling either balanced or unbalanced ADNs with an unlimited number of nodes or laterals. The integrated models involve modeling of distribution lines, losses inside distribution transformers, automatic voltage regulators (AVRs), DG units, shunt capacitor banks (SCBs) and different load models. To verify its validity, the presented algorithm was first applied to the unbalanced IEEE 37-node standard feeder in both passive and active states. Moreover, the algorithm was then applied to a balanced 22 kV real distribution network as a case study. The selected network is located in a remote area in the western desert of Upper Egypt, far away from the Egyptian unified national grid. Accordingly, the paper examines the current and future situation of the Egyptian electricity market. Comparison studies between the performance of the proposed ADNs and the classical PDNs are discussed. Simulation results are presented to demonstrate the effectiveness of the proposed ADNs in preserving the network assets, improving the system performance and minimizing the power losses.

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