Research on Power Systems-Driven Model of Hybrid Electric Sanitation Vehicle

2013 ◽  
Vol 373-375 ◽  
pp. 2161-2164
Author(s):  
Chuan Sheng Si ◽  
Zhuang Zhuang Shang
Keyword(s):  
Power Systems ◽  
Development Trend ◽  
Actual Situation ◽  
Hybrid Electric ◽  
At Home

Combined with the actual situation of sanitation vehicle at home and abroad, the text analyzes development trend of hybrid electric sanitation vehicle, selected assembly-driven structure of parallel electric sanitation vehicle power systems,designed two different programs of power systems, and this program plays an important role in improving the dynamic and economy of sanitation vehicle.

App design of distance art education platform under internet ecological environment

2021 ◽  
pp. 002072092098352
Author(s):  
Lanlan Xu ◽  
Qiang Zhou
Keyword(s):  
Art Education ◽  
Interaction Design ◽  
Rapid Development ◽  
Development Trend ◽  
Mobile App ◽  
Traditional Art ◽  
Art Teaching ◽  
Education Platform ◽  
App Design ◽  
At Home

With the rapid development of computer and network technology, the application of mobile app has been involved in all walks of life, especially the traditional art teaching mode. Therefore, it is of great significance to design an app with art learning and education as the main content based on the concept of young people's cognitive psychology and art training. This paper first analyzes the current situation and development trend of art education app at home and abroad, then analyzes and studies the design and application needs of education app at home, clarifies the needs of students and teachers, analyzes the visual and psychological characteristics of teenagers and their impact on interface and interaction design, and finally designs an art education app that meets the domestic needs. The results show that the app can enhance the interest of young people in art learning.

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.

scholarly journals Review of VSG Control-Enabled Universal Compatibility Architecture for Future Power Systems with High-Penetration Renewable Generation

2019 ◽  
Vol 9 (7) ◽  
pp. 1484 ◽  
Author(s):  
Xiangwu Yan ◽  
Weichao Zhang
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Control Strategy ◽  
Fossil Fuels ◽  
Clean Energy ◽  
Energy Generation ◽  
Development Trend ◽  
Synchronous Machines ◽  
Renewable Generation ◽  
Renewable Energy Generation

Due to the irreversible energy substitution from fossil fuels to clean energy, the development trend of future power systems is based on renewable energy generation. However, due to the incompatibility of converter-based non-dispatchable renewable energy generation, the stability and reliability of traditional power systems deteriorate as more renewables are introduced. Since conventional power systems are dominated by synchronous machines (SM), it is natural to utilize a virtual synchronous generator (VSG) control strategy that intimates SM characteristics on integrated converters. The VSG algorithm developed in this paper originates from mimicking mathematic models of synchronous machines. Among the different models of implementation, the second-order model is simple, stable, and compatible with the control schemes of current converters in traditional power systems. The VSG control strategy is thoroughly researched and case studied for various converter-interfaced systems that include renewable generation, energy storage, electric vehicles (EV), and other energy demands. VSG-based integration converters can provide grid services such as spinning reserves and inertia emulation to the upper grids of centralized plants, distributed generation networks, and microgrids. Thus, the VSG control strategy has paved a feasible way for an evolutionary transition to a power electronics-based future power grid. By referring to the knowledge of traditional grids, a hierarchical system of operations can be established. Finally, generation and loads can be united in universal compatibility architecture under consolidated synchronous mechanisms.

Predict Research for Loss of Life Due to Dam Breach for Guangxi Luocheng Kama Reservoir

2011 ◽  
Vol 243-249 ◽  
pp. 3877-3882
Author(s):  
Rong Yong Ma ◽  
Xiang Chen ◽  
Lei Lei Yang ◽  
Xiao Qing Zhang
Keyword(s):  
Calculation Result ◽  
Dam Break ◽  
Dam Failure ◽  
Suitable Model ◽  
Actual Situation ◽  
Dam Breach ◽  
Loss Of Life ◽  
At Home

In this paper，the basic situation of Guangxi luocheng Kama reservoir and the potential dangers are introduced firstly, and then，different models often used to estimate the loss of life in dam failure at home and abroad are introduced and analysed.Based on the above, a suitable model for national actual situation is chosen to predict the loss due to this reservoir dam breach，and the severity according to the calculation result of assuming Kama reservoir dam-break is assessed. Finally, the relevant departments’s measures of rescuing and evacuating downstream masses etc. at danger in 2009 are proved to be correct，necessary and timely.

Unit commitment in power systems with plug-in hybrid electric vehicles

2012 ◽  
Vol 23 (7) ◽  
pp. 1205-1220 ◽  
Author(s):  
Lingrong Lu ◽  
Fushuan Wen ◽  
Gerard Ledwich ◽  
Jiansheng Huang
Keyword(s):  
Power Systems ◽  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Unit Commitment ◽  
Hybrid Electric
Sign in / Sign up

Export Citation Format

Share Document