scholarly journals Optimal Operation Method for Microgrid with Wind/PV/Diesel Generator/Battery and Desalination

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Qingfeng Tang ◽  
Nian Liu ◽  
Jianhua Zhang
Keyword(s):  
Power Supply ◽  
Optimal Operation ◽  
Environmental Benefits ◽  
Seawater Desalination ◽  
Diesel Generator ◽  
Nsga Ii ◽  
Optimal Method ◽  
Diesel Generators ◽  
Storage Batteries ◽  
Supply Mode

The power supply mode of island microgrid with a variety of complementary energy resources is one of the most effective ways to solve the problem of future island power supply. Based on the characteristics of seawater desalination system and water demand of island residents, a power allocation strategy for seawater desalination load, storage batteries, and diesel generators is proposed with the overall consideration of the economic and environmental benefits of system operation. Furthermore, a multiobjective optimal operation model for the island microgrid with wind/photovoltaic/diesel/storage and seawater desalination load is also proposed. It first establishes the objective functions which include the life loss of storage batteries and the fuel cost of diesel generators. Finally, the model is solved by the nondominated sorting genetic algorithm (NSGA-II). The island microgrid in a certain district is taken as an example to verify the effectiveness of the proposed optimal method. The results provide the theoretical and technical basis for the optimal operation of island microgrid.

scholarly journals Multiobjective Economic Optimal Dispatch for the Island Isolated Microgrid under Uncertainty Based on Interval Optimization

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Guoping Zhang ◽  
Weijun Wang ◽  
Jie Du ◽  
Haoyun Sheng
Keyword(s):  
Storage System ◽  
Economic Cost ◽  
Optimal Operation ◽  
Interval Optimization ◽  
Renewable Generation ◽  
Diesel Generator ◽  
Nsga Ii ◽  
Operation Optimization ◽  
Optimal Dispatch ◽  
The Impact

In order to analyse the impact of renewable generation and load uncertainties on the economic operation optimization of the island microgrid, a multiobjective economic optimal dispatch model under uncertainty based on interval optimization is proposed in this paper. The mathematical model of distributed generation and the prediction model of wind speed and wave generation are established. The uncertainties of renewable generation and load are described by the interval mathematical method. On this basis, the interval multiobjective optimal dispatch model is presented. For the “battery disgusting” users on the island, the battery cost is regarded as a separate optimization objective, and a multiobjective optimization objective function to minimize the economic cost, battery cost, and pollution emission of the island microgrid is discussed. An island microgrid, composed of wind turbine, photovoltaic, wave energy generation, diesel generator, and energy storage system, is chosen as a case study. The NSGA-II algorithm is applied to solve the multiobjective optimal problem. The results for deterministic forecast data and load are analysed, and the optimal operation scheme is obtained by the improved multiobjective grey target decision-making method. The influence of renewable generation fluctuations ±10%, ±20%, and ±30% and the load fluctuations ±10% and ±20% on island microgrid operation optimization is discussed in detail, respectively. The relevant research results can provide a reference for formulating the operating scheme of the island microgrid.

scholarly journals Selection of Best Power Supply Source for Telecom Towers in Remote Areas

2020 ◽  
Vol 5 (5) ◽  
pp. 913-925
Author(s):  
Shwetank Avikal ◽  
Rahul Singhal ◽  
Rajat Sajwan ◽  
Rahul Kumar Tiwari ◽  
Rohit Singh
Keyword(s):  
Power Supply ◽  
Fuzzy Ahp ◽  
Operating Cost ◽  
Energy System ◽  
Maintenance Cost ◽  
Diesel Generator ◽  
Supply Source ◽  
Remote Areas ◽  
Power Supply Source ◽  
Diesel Generators

Installation of telecom towers in remote areas especially in developing countries like India is a major problem for telecom industries because of the unavailability of reliable power supply. The grid supply is not regular in these countries and up to some extent, they are dependent on diesel generators for power supply. But these diesel generators have some major issues such as high operating cost due to high cost of fuel, transportation cost of fuel, high maintenance cost, and these diesel generators also emits pollution to the environment. In presented work, an approach has been proposed for telecom companies for providing power supply to their telecom towers. An economic cost analysis has been proposed by considering various criteria such as cost, air & noise pollution and reliability, etc. Some power supply alternatives including unconventional and hybrid of conventional and unconventional alternatives have been compared to find the solution such as diesel-powered telecom towers, solar powered telecom towers, and their hybrids. The main objective of this work is to provide a reliable, cost effective and environment friendly Remote Area Power Supply (RAPS) system for a particular site in India (Uttar Pradesh). A number of criteria are involved in discussed problem in order to select an effective power supply source. Therefore, the problem has been considered as a Multi Criteria Decision Making (MCDM) problem. To select the best alternative, a Fuzzy AHP and TOPSIS based approach has been proposed. Fuzzy AHP (Analytic Hierarchy process) has been used for calculating the weightage of criteria and the concept of Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) has been applied for ranking the alternatives. The results give assured reliability and sustainability for remote areas using a solar photovoltaic (PV)-diesel generator hybrid energy system.

Analysis of Data Center Power System

2014 ◽  
Vol 989-994 ◽  
pp. 1224-1227
Author(s):  
Hui Song ◽  
Zhi Tan Wang
Keyword(s):  
Power System ◽  
Power Supply ◽  
Data Center ◽  
Electrical Equipment ◽  
Diesel Generator ◽  
Emergency Power ◽  
Compensation Device ◽  
Equipment Configuration ◽  
Supply Mode ◽  
Power Supply Mode

Data center presented in this paper, has a high requirement on the power supply system, that needs emergency power supply, SVG compensation device, large diesel generator set, two lines of mains large capacity UPS and other electric equipments. And there are some differences between data center and conventional power system in many aspects,such as in the nature, quantity, the load requirements, the related electrical equipment configuration, load, power supply mode, connection,and so on.

Feasibility Analysis of Stand-Alone Renewable Energy Supply for Telecommunication Tower Using Homer

2016 ◽  
Vol 818 ◽  
pp. 223-227
Author(s):  
Mohamad Shahrizal Mohd Noor ◽  
Zuraimy Adzis ◽  
Yanuar Z. Arief ◽  
Nor Asiah Muhamad
Keyword(s):  
Renewable Energy ◽  
Energy Supply ◽  
High Energy ◽  
Environmental Benefits ◽  
Solar Pv ◽  
Diesel Generator ◽  
Pv System ◽  
Economic Output ◽  
Wide Range ◽  
Diesel Generators

This paper deals with the importance and need of using solar photovoltaic (PV) system as a stand-alone system instead of diesel generators for electrical energy supply of a communication tower owned by Celcom (Malaysia) Berhad at G0422 Batu 18, Ulu Langat, Selangor, Malaysia. It can be considered as a commercial renewable energy application in Malaysia, addressing the potential and possibility of adopting solar energy resources, particularly for sectors with high energy consumption. The electric power generation system, which consists of solar PV system hybrid with diesel generator, has the ability to provide 24 hours electricity to the load. To optimize the system design, this work compares a wide range of equipment with different constraints and sensitivities. The Hybrid Optimization Model for Electric Renewables (HOMER) was utilized for designing the system in the early phases of planning and decision making in rural electrification projects due to its flexibility. The analysis is based on the technical properties and life cycle cost (LCC) of the system. The initial capital cost, cost of installation and operation costs over the system’s life span is comprised in the LCC. This system offers a better reliability, efficiency, flexibility of planning and environmental benefits compared to the diesel generators systems by saving the environment from the burning of fossil fuels. The proposed system is able to supply 3.5kW of power which is suitable for actual site loading requirement of around 3kW. The economic output from HOMER exhibits that the tower without diesel generator, total net present cost is RM 610,639, the highest compared with a tower with diesel generator; RM 421,244.

scholarly journals The Use of Generating Sets with ING Gas Engines in “Shore to Ship” Systems

2016 ◽  
Vol 23 (3) ◽  
pp. 172-177 ◽  
Author(s):  
Dariusz Tarnapowicz ◽  
Sergiej German-Galkin
Keyword(s):  
Air Pollution ◽  
Power Supply ◽  
Electrical Energy ◽  
Environmental Benefits ◽  
Power Electronic ◽  
Diesel Generator ◽  
Power Electronic Converters ◽  
Advantages And Disadvantages ◽  
Generating Sets ◽  
Generator Sets

Abstract The main sources of air pollution in ports are ships, on which electrical energy is produced in the autonomous generating sets Diesel-Generator. The most effective way to reduce harmful exhaust emissions from ships is to exclude marine generating sets and provide the shore-side electricity in “Shore to Ship” system. The main problem in the implementation of power supply for ships from land is connected with matching parameters of voltage in onshore network with marine network. Currently, the recommended solution is to supply ships from the onshore electricity network with the use of power electronic converters. This article presents an analysis of the „Shore to Ship” system with the use of generating sets with LNG gas engines. It shows topologies with LNG - Generator sets, environmental benefits of such a solution, advantages and disadvantages.

scholarly journals Multi-objective operation optimization of regional integrated energy system based on NSGA-II algorithm

2021 ◽  
Vol 257 ◽  
pp. 02022
Author(s):  
Zheming Xu ◽  
Changbin Hu ◽  
Xiaojun Lu
Keyword(s):  
Energy System ◽  
Optimal Operation ◽  
Air Pollutant ◽  
Environmental Benefits ◽  
Pollutant Emissions ◽  
Pollutant Emission ◽  
Nsga Ii ◽  
Multi Objective ◽  
District Energy ◽  
Integrated Energy System

With the deepening of China’s energy market reform and the promotion of integrated energy services, the regional integrated energy system becomes an important development direction of energy supply system. In order to maximize the economic efficiency and reduce the air pollutant emission of the regional integrated energy system, the distributed power generation module and the cooling-heat-power (CCHP) triple-supply module are formed into a model, and the power balance, equipment capacity and environmental factors of the system are constrained with the objective function of minimizing the daily operation cost of the system as well as minimizing the air pollutant emission. Based on the mathematical system framework model and the optimal operation control strategy, the NSGA-II algorithm is used to solve the multi-objective programming model to obtain the Pareto solution set, and the hourly output of the optimal operation of the system equipment with both economic and environmental benefits is obtained. The results show that the daily operating costs and pollutant emissions of the district energy system are significantly reduced compared with those without optimization, which effectively solves the problems of low operating efficiency and serious environmental pollution of the district energy system and achieves the optimal operation with both economic and environmental benefits.

scholarly journals A Novel Co-Phase Power-Supply System Based on Modular Multilevel Converter for High-Speed Railway AT Traction Power-Supply System

Energies ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 253
Author(s):  
Si Wu ◽  
Mingli Wu ◽  
Yi Wang
Keyword(s):  
Power Supply ◽  
High Speed ◽  
Power Supply System ◽  
Supply System ◽  
High Speed Railway ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Supply Mode ◽  
Power Supply Mode ◽  
Traction Power

The existing problems of the traction power-supply system (i.e., the existence of the neutral section and the power quality problems) limit the development of railways, especially high-speed railways, which are developing rapidly worldwide. The existence of the neutral section leads to the speed loss and traction loss as well as mechanical failures, all of which threaten the fast and safe operation of the train and the system. Meanwhile, the power quality problems (e.g., the negative sequence current, the reactive power, and the harmonic) can bring a series of problems that cannot be ignored on the three-phase grid side. In response, many researchers have proposed co-phase power-supply schemes to solve these two problems simultaneously. Given that the auto-transformer (AT) power-supply mode has become the main power-supply mode for the high-speed railway traction power-supply system, it has a bright future following the rapid development of the high-speed railway. In addition, there is no co-phase power-supply scheme designed for AT power-supply mode in the existing schemes. Therefore, the main contribution of this paper is to propose a specifically designed power-supply mode more suitable for the AT, as well as to establish the control systems for the rectifier side and the inverter side. In addition, for the proposed scheme, the operation principle is analyzed, the mathematical model is built, and the control system is created, and its functionality is verified by simulation, and its advantages are compared and summarized finally. The result proves that it can meet functional requirements. At the same time, compared with the existing co-phase power-supply scheme, it saves an auto-transformer in terms of topology, reduces the current stress by 10.9% in terms of the current stress of the switching device, and reduces the power loss by 0.25% in terms of the entire system power loss, which will result in a larger amount of electricity being saved. All of this makes it a more suitable co-phase power-supply scheme for the AT power-supply mode.

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