scholarly journals Hybrid Power System for the Range Extension of Security Robots: Specification Development Phase

2021 ◽  
Vol 11 (23) ◽  
pp. 11577
Author(s):  
Woosuk Sung
Keyword(s):  
Power Systems ◽  
Power System ◽  
Operating Conditions ◽  
Critical Conditions ◽  
Development Phase ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Long Duration ◽  
Main Development ◽  
Development Goals

This paper describes our best practices related to hybrid power system (HPS) development, with a focus on the specification development phase. The HPS specifications are based on the main development goals of our security robot, which place top priority on 24 h continuous operation on a single charge. Similar to human guards, security robots are expected to operate 24 h per day, seven days per week, but existing battery-powered robots cannot meet these goals. For long-duration missions, their operating times are too short, and their charging times are too long. As an effective alternative, hydrogen fuel cells are combined with batteries to hybridize the power systems of security robots. In this study, several HPS structures were comprehensively compared by selecting a one-stage series structure. Component specifications were determined based on the selected structure to achieve the main development goals of our security robot. To verify whether the determined specifications are valid, a HPS simulator was developed. The key operating conditions for the HPS were simulated, including overloading, terminal short-circuiting, and drive cycling. Under critical conditions, the behavior of the entire system and its components was confirmed. The developed specifications will eventually be carried over to the prototyping phase.

scholarly journals Sizing and Simulation of PV-Wind Hybrid Power System

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Mustafa Engin
Keyword(s):  
Power System ◽  
Wind Turbine ◽  
Hybrid System ◽  
Operating Conditions ◽  
Renewable Energy Resources ◽  
Average Wind Speed ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Battery Capacity ◽  
Yearly Average

A sizing procedure is developed for hybrid system with the aid of mathematical models for photovoltaic cell, wind turbine, and battery that are readily present in the literature. This sizing procedure can simulate the annual performance of different kinds of photovoltaic-wind hybrid power system structures for an identified set of renewable resources, which fulfills technical limitations with the lowest energy cost. The output of the program will display the performance of the system during the year, the total cost of the system, and the best size for the PV-generator, wind generator, and battery capacity. Security lightning application is selected, whereas system performance data and environmental operating conditions are measured and stored. This hybrid system, which includes a PV, wind turbine, inverter, and a battery, was installed to supply energy to 24 W lamps, considering that the renewable energy resources of this site where the system was installed were 1700 Wh/m2/day solar radiation and 3.43 m/s yearly average wind speed. Using the measured variables, the inverter and charge regulator efficiencies were calculated as 90% and 98%, respectively, and the overall system’s electrical efficiency is calculated as 72%. Life cycle costs per kWh are found to be $0.89 and LLP = 0.0428.

scholarly journals Application of using Hybrid Renewable Energy in Saudi Arabia

2011 ◽  
Vol 1 (4) ◽  
pp. 84-89
Author(s):  
E. A. Al-Ammar ◽  
N. H. Malik ◽  
M. Usman
Keyword(s):  
Saudi Arabia ◽  
Renewable Energy ◽  
Power Systems ◽  
Power System ◽  
Power Plants ◽  
Hybrid Power Systems ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Hybrid Renewable Energy ◽  
The Village

One of the major world wide concerns of the utilities is to reduce the emissions from traditional power plants by using renewable energy and to reduce the high cost of supplying electricity to remote areas. Hybrid power systems can provide a good solution for such problems because they integrate renewable energy along with the traditional power plants. In Kingdom of Saudi Arabia a remote village called Al-Qtqt, was selected as a case study in order to investigate the ability to use a hybrid power system to provide the village with its needs of electricity. The simulation of this hybrid power system was done using HOMER software.

scholarly journals Hybrid Power System for the Range Extension of Security Robots: Prototyping Phase

2021 ◽  
Vol 11 (24) ◽  
pp. 12095
Author(s):  
Woosuk Sung ◽  
Yong-Gu Park
Keyword(s):  
Fuel Cells ◽  
Power System ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Discharge System ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Development Goals ◽  
Electronic Load ◽  
A Charge

This paper describes our best practices related to hybrid power system (HPS) development with a focus on the prototyping phase. Based on the main development goals of our security robot, 24 h continuous operation on a single charge as a top priority, the HPS specifications were developed in the previous phase. For long-duration missions, batteries are hybridized with hydrogen fuel cells. By hybridization, the practical issues of fuel cells can be addressed such as lack of durability and low power density. With the developed specifications of the HPS, its components were acquired and installed to build a prototype. Using an electronic load coupled with a charge-discharge system controller, the constructed prototype was tested, discovering the maximum output power (850 W) that the fuel cell can sustain for 24 h. To further increase the energy density of the HPS, its structure was converted to a plug-in hybrid. With the developed HPS simulator, the converted HPS was simulated, predicting an extended hours of operation (2.07 h) based on the larger battery (7S12P) over the widest SOC window (90%). The plug-in HPS prototype was integrated into the security robot. On a dedicated chassis dynamometer, the integrated prototype was tested, demonstrating its capability to continuously operate the security robot for 24 h.

Optimization of Hybrid Power System Operation

Solar Energy ◽  
2004 ◽  
Author(s):  
Kendra Tupper ◽  
Rob Jensen ◽  
Joe Cloyd ◽  
Rob Wills ◽  
Charles Sullivan
Keyword(s):  
Power Systems ◽  
Power System ◽  
Cost Savings ◽  
Cost Effective ◽  
System Operation ◽  
Power System Operation ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Load Following ◽  
The Cost

In developing countries, half of the world’s population lives without electric power. Hybrid power systems, consisting of photovoltaic (PV) modules, battery banks, and backup diesel generators, have the potential to become a cost-effective solution for delivering power to many of these remote villages where grid extension is cost-prohibitive. In this paper, we show that improved dispatch strategies can significantly decrease the cost of a hybrid power system. We propose using a genetic algorithm (GA) in combination with novel load and insolation predictive strategies to reduce the operating costs over the present state-of-the-art methods. Realistic simulations demonstrate that this technique provides an average cost savings of 20.9% over the Set Point Strategy and 13.8% over the Load Following Strategy. We show that this strategy is a viable means of reducing the cost of hybrid power system operation.

Research on Simulation and Experiment of Ship Complex Diesel-Electric Hybrid Propulsion System

2020 ◽  
Vol 64 (02) ◽  
pp. 171-184
Author(s):  
Nengqi Xiao ◽  
Xiang Xu ◽  
Baojia Chen
Keyword(s):  
Power System ◽  
Energy Management ◽  
Test Bench ◽  
Propulsion System ◽  
Operating Conditions ◽  
Hybrid Power System ◽  
Hybrid Propulsion ◽  
Hybrid Power ◽  
Operation Modes ◽  
And Control

This article introduces the composition and 12 operating conditions of a four-engine two-propeller hybrid power system. Through the combination of gearbox clutch and disconnection, the propulsion system has four single-engine operation modes, two double-engine parallel operation modes, and six PTI operation modes. Because the propulsion system has a variety of operating conditions, each operating condition has a form of energy transfer. As a result, its energy management and control are more complicated. To study the energy management and control strategy of a diesel- electric hybrid propulsion system, this work mainly studies the simulation model and sub-models of a diesel-electric hybrid propulsion system. In this study, MATLAB/ SIMULINK software is used to build the diesel engine model, motor model, and ship engine system mathematical model. The test and analysis were carried out on the test bench of the diesel-electric hybrid power system. By comparing the theoretical value of the SIMULINK simulation model with the test value of the test bench system, the correctness of each sub-model modeling method is verified. On the one hand, research on the text lays a theoretical foundation for the subsequent implementation of the conventional energy management and control strategy based on state identification on the unified management and distribution of the diesel-electric hybrid power system. At the same time, energy management of the diesel-electric hybrid system is also carried out. Optimization research provides theoretical guidance.

scholarly journals A Novel Evaluation Model for Hybrid Power System Based on Vague Set and Dempster-Shafer Evidence Theory

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Dongxiao Niu ◽  
Yanan Wei ◽  
Yan Shi ◽  
Hamid Reza Karimi
Keyword(s):  
Power Systems ◽  
Power System ◽  
Index System ◽  
Evaluation Model ◽  
Evidence Theory ◽  
Hybrid Power Systems ◽  
Decision Matrix ◽  
Hybrid Power System ◽  
Vague Set ◽  
Hybrid Power

Because clean energy and traditional energy have different advantages and disadvantages, it is of great significance to evaluate comprehensive benefits for hybrid power systems. Based on thorough analysis of important characters on hybrid power systems, an index system including security, economic benefit, environmental benefit, and social benefit is established in this paper. Due to advantages of processing abundant uncertain and fuzzy information, vague set is used to determine the decision matrix. Convert vague decision matrix to real one by vague combination ruleand determine uncertain degrees of different indexes by grey incidence analysis, then the mass functions of different comment set in different indexes are obtained. Information can be fused in accordance with Dempster-Shafer (D-S) combination rule and the evaluation result is got by vague set and D-S evidence theory. A simulation of hybrid power system including thermal power, wind power, and photovoltaic power in China is provided to demonstrate the effectiveness and potential of the proposed design scheme. It can be clearly seen that the uncertainties in decision making can be dramatically decreased compared with existing methods in the literature. The actual implementation results illustrate that the proposed index system and evaluation model based on vague set and D-S evidence theory are effective and practical to evaluate comprehensive benefit of hybrid power system.

Dynamic Modeling and Simulation on a Hybrid Power System for Dual-Motor-Drive Electric Tracked Bulldozer

2014 ◽  
Vol 494-495 ◽  
pp. 229-233 ◽  
Author(s):  
Hong Wang ◽  
Feng Chun Sun
Keyword(s):  
Power Systems ◽  
Power System ◽  
Dynamic Models ◽  
High Efficiency ◽  
Motor Drive ◽  
Hybrid Power Systems ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Simulation Results ◽  
The Mathematical Model

Hybrid power systems provide high-performances and high-efficiency power for electric bulldozer. This paper firstly constructs the mathematical model of driving motors system based on the design of dual-motor-driving propulsion system for bulldozer. Secondly, by using the setting values from a bulldozer, simulation work is implemented, and parameters of the hybrid power system are matched, and finally, based on MATLAB/Simulink ,dynamic models for the dual-motor-driving hybrid power system is established, and the simulation results are discussed. Simulation results demonstrate the validity of the hybrid power system model and the matching of the parameters of the hybrid power system is reasonable.

A Novel Fused Converter for Hybrid Power Systems

2014 ◽  
Vol 984-985 ◽  
pp. 744-749
Author(s):  
W. Margaret Amutha ◽  
Renugadevi ◽  
V. Rajini
Keyword(s):  
Wind Speed ◽  
Power Systems ◽  
Power System ◽  
Rural Areas ◽  
Power Flow ◽  
Electrical Energy ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Different Seasons ◽  
Continuous Power

—Hybrid power system consists of different sources of electrical energy with different operating times during different seasons. Deployment of a hybrid power system is expected in rural areas. Supplying remote load systems such as rural telephony, hospitals, military etc.., where continuous power supply is required, can be realized with the combination of wind and solar power. The proposed topology is designed for telecom load which uses dual input dc-dc fused converter for combining solar and wind energy sources. For the further research and improvements in the proposed fused converter topology, it is necessary to know in detail the power flow from solar and wind sources to the load or to storage battery depending on different seasons. For various wind speed with constant solar irirradiation and, for various solar irirradiations with constant wind speed, the power flow of the hybrid power system is simulated and presented. The same topology is investigated for different switching frequencies (10 kHz and 20 kHz), using MATLAB/SIMULINK, and the efficiencies are calculated.

scholarly journals Intertied AC-DC Hybrid System Power Sharing Through Intelligent Droop Controller

2018 ◽  
Vol 8 (1) ◽  
pp. 2609-2615
Author(s):  
P. Gupta ◽  
P. Swarnkar
Keyword(s):  
Power Systems ◽  
Power System ◽  
Hybrid System ◽  
Power Flow ◽  
Power Converter ◽  
Power Sharing ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Power Management Strategy ◽  
Communication Links

The result of DG clustering is the hybrid power system while further clustering forms the intertied hybrid power system. Interfacing of intertied hybrid power system requires an interlinking converter with a legitimate power administration and control system. In contrast to individual hybrid power system (HPS), power administration of the intertied hybrid system is more complex. Autonomous droop strategy is appropriate for the intertied hybrid system where communication links are not possible. This paper proposes a new topology for control in intertied hybrid system where two hybrid power systems are connected to each other through interlink power converter. Evaluated frequencies in different HPSs can diverse. In order to manage power flow a power management strategy with consideration characteristics of common bus, a PDC-vDC2 method is proposed, and compared with conventional droop, to realize power sharing among HPS. The practicability of the proposed power sharing method is realized in MATLAB/Simulink platform.

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