Economic Operation Assessment of Micro-Grid Combining Photovoltaic and Energy-Storage

2013 ◽  
Vol 291-294 ◽  
pp. 2015-2021
Author(s):  
Li Fang Wei ◽  
Min Zhang
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Economic Analysis ◽  
Case Studies ◽  
Market Competition ◽  
Recovery Model ◽  
Economic Operation ◽  
Photovoltaic Power ◽  
Micro Grid ◽  
Financial Profitability

In order to carry an economic analysis of micro-grid project represented by photovoltaic power-generation, this paper proposed a cost recovery model for micro-grid project through case studies. Meanwhile, based on how micro-grid participates in market competition, we have designed the framework for gaining profits. Issues like basic profits, reasonable depreciation method and the project’s financial profitability are analyzed in detail.

scholarly journals Study on a New Operational Mode of Economic Operation of Islanded Microgrids Using Electric Springs

2018 ◽  
Vol 160 ◽  
pp. 04004
Author(s):  
Zhiyu Zhao ◽  
Keyou Wang ◽  
Guojie Li ◽  
Xiuchen Jiang ◽  
Yin Zhang
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Peak Load ◽  
Energy Storage System ◽  
Operational Cost ◽  
Operational Mode ◽  
Load Demand ◽  
Economic Operation

With the increasing penetration of intermittent renewable energy sources (RESs) into microgrids, the original operation mode of power generation determined by load demand faces severe challenges due to the uncertainties of the RESs power output. The electric springs(ESs), as an emerging technology has been verified to be effective in enabling load demand to follow power generation and stabilizing fluctuation of RESs output. This paper presents a new mode of economic operation for island microgrids including non-critical loads with embedded electric springs. Its connotation includes that i) the capacity of energy storage can be reduced through the interaction of the energy storage system (ESS) and the electric springs, ii) the electric springs reduce the stress of peak load regulation and operational cost and iii) the demand of microgrids system for ramping ability of generation units is reduced with the buffer of the electric springs. Numerical results show that the coordinated operation between electric springs and energy storage system of microgrids can bring down the investment cost for the ESS and short-term operational cost in the aspect of economic dispatch, reducing requirements for the capacity and ramp ability of the energy storage system in microgrids. Energy buffering can be achieved with lower cost and the load demand can follow power generation in the new operational mode of islanded microgrids using electric springs.

CHP Microgrid Optimized Operation Based on Bacterial Foraging Optimization Algorithm

2014 ◽  
Vol 981 ◽  
pp. 668-672
Author(s):  
Rui Li ◽  
Peng Li
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Optimization Algorithm ◽  
Storage System ◽  
Energy Storage System ◽  
Optimal Operation ◽  
Bacterial Foraging Optimization ◽  
Distributed Power ◽  
Bacterial Foraging ◽  
Micro Grid

CHP system with Energy saving, environmental protection, economic and other characteristics,have good prospects for the development and application value.This paper directe a micro grid system consisted by photovoltaic cells, wind turbines, fuel cells, microturbines, auxiliary boilers, thermal energy storage systems and batteries and heat load and electrical load.Considering various distributed power generation costs, environmental costs and micro-grid equipment maintenance costs,To meet the constraints of micro-grid operation, optimization of the different micro-grid distributed power and energy storage system power output, make the system's total operating costs are minimized.This paper analyzes the economic and environmental of micro-grid optimal operation characteristics, given a model of CHP micro-grid.For the cost of power generation and emissions of different weights, using bacterial foraging optimization(BFO) algorithm,through a numerical example verified the Correctness and effectiveness of mathematical model and optimization algorithm .

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