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.

scholarly journals Optimal Adaptive Gain LQR-Based Energy Management Strategy for Battery–Supercapacitor Hybrid Power System

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1660
Author(s):  
Seydali Ferahtia ◽  
Ali Djeroui ◽  
Tedjani Mesbahi ◽  
Azeddine Houari ◽  
Samir Zeghlache ◽  
...  
Keyword(s):  
Power System ◽  
Energy Management ◽  
Management Strategy ◽  
Lithium Ion ◽  
Control Technique ◽  
Energy Management Strategy ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Load Following ◽  
Stable Voltage

This paper aims at presenting an energy management strategy (EMS) based upon optimal control theory for a battery–supercapacitor hybrid power system. The hybrid power system consists of a lithium-ion battery and a supercapacitor with associated bidirectional DC/DC converters. The proposed EMS aims at computing adaptive gains using the salp swarm algorithm and load following control technique to assign the power reference for both the supercapacitor and the battery while achieving optimal performance and stable voltage. The DC/DC converter model is derived utilizing the first-principles method and computes the required gains to achieve the desired power. The fact that the developed algorithm takes disturbances into account increases the power elements’ life expectancies and supplies the power system with the required power.

scholarly journals Architectural and functional classification of smart grid solutions

2019 ◽  
Vol 2 (S1) ◽  
Author(s):  
Friederike Wenderoth ◽  
Elisabeth Drayer ◽  
Robert Schmoll ◽  
Michael Niedermeier ◽  
Martin Braun
Keyword(s):  
Smart Grid ◽  
Power Systems ◽  
Power System ◽  
Power Distribution ◽  
Hierarchical Architecture ◽  
Distribution Grid ◽  
Active System ◽  
System Operation ◽  
Power System Operation

Abstract Historically, the power distribution grid was a passive system with limited control capabilities. Due to its increasing digitalization, this paradigm has shifted: the passive architecture of the power system itself, which includes cables, lines, and transformers, is extended by a communication infrastructure to become an active distribution grid. This transformation to an active system results from control capabilities that combine the communication and the physical components of the grid. It aims at optimizing, securing, enhancing, or facilitating the power system operation. The combination of power system, communication, and control capabilities is also referred to as a “smart grid”. A multitude of different architectures exist to realize such integrated systems. They are often labeled with descriptive terms such as “distributed,” “decentralized,” “local,” or “central." However, the actual meaning of these terms varies considerably within the research community.This paper illustrates the conflicting uses of prominent classification terms for the description of smart grid architectures. One source of this inconsistency is that the development of such interconnected systems is not only in the hands of classic power engineering but requires input from neighboring research disciplines such as control theory and automation, information and telecommunication technology, and electronics. This impedes a clear classification of smart grid solutions. Furthermore, this paper proposes a set of well-defined operation architectures specialized for use in power systems. Based on these architectures, this paper defines clear classifiers for the assessment of smart grid solutions. This allows the structural classification and comparison between different smart grid solutions and promotes a mutual understanding between the research disciplines. This paper presents revised parts of Chapters 4.2 and 5.2 of the dissertation of Drayer (Resilient Operation of Distribution Grids with Distributed-Hierarchical Architecture. Energy Management and Power System Operation, vol. 6, 2018).

Aircraft Power System Options and Thermal Management for High, Pulsed Power Application

2004 ◽  
Author(s):  
V. Shanmugasundaram ◽  
M. L. Ramalingam ◽  
Brian Donovan ◽  
T. Mahefkey ◽  
B. Hager
Keyword(s):  
Power System ◽  
Thermal Management ◽  
Power Density ◽  
Duty Cycle ◽  
Power Source ◽  
Pulsed Power ◽  
Specific Power ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Load Following

A general thermodynamic analytical evaluation tool was developed to investigate the impact of technological improvements on mission effectiveness and weapon power generation in an aircraft based pulsed power system. The power system investigated consists of six major components, the prime power source, the power generator, the power conditioner, the pulsed power source, the pulsed power processor and the thermal management with a total estimated payload restriction of 4600 kgs. based on a USAF cargo aircraft. The analysis was based on a 2.5 MW pulsed power source output and a notional mission profile with an engagement period of 60 minutes during which several duty cycle scenarios were considered. Six power system architectures were evaluated with a baseline power system model that incorporated current off-the-shelf technologies for each component. A helicopter engine was used as the primary power source because of its high power density but the engine performance is very sensitive to increasing altitude where the output power diminishes rapidly. As a result of this and the necessity to accommodate load-following during engagement, the investigations were extended to a hybrid power system architecture with turboalternator-battery and turboalternator-flywheel combinations. Preliminary analysis based on prorated values of specific power and power density for all the components revealed that the overall mass of the power system could be brought down from 13,330 kgs. for the baseline architecture to 4075 kgs. for the conceptual load-following turboalternator-battery hybrid power system. Coolant requirements for an open thermal management system ranged from 2007 kgs. of Ammonia or 1127 kgs. of water for a heat load of 2.9 Mwt corresponding to a 30% duty cycle pulsed power source operation.

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.

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