scholarly journals Energy Storage Configuration Optimization Strategy for Islanded Microgrid Interconnection Based on Energy Consumption Characteristics

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Haoqing Wang ◽  
Chunyan Ma ◽  
Wanxing Sheng ◽  
Guanglin Sha ◽  
Caihong Zhao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Cost Saving ◽  
Economic Benefits ◽  
Optimization Strategy ◽  
Storage Allocation ◽  
Distributed Energy ◽  
The Cost ◽  
Configuration Scheme ◽  
Positive Effect ◽  
Allocation Strategies

As a result of distributed energy development, the demand for energy storage grows more rapidly. The optimization of energy storage allocation is urgently needed. The economic benefits and characteristics of storage allocation have been thoroughly explored, and a mathematical model of economy was established. The centralized configuration of energy storage can make the best use of surplus electricity and reduce charging loss. The peak cutting and valley filling effect is quite obvious. Furthermore, some allocation strategies of storage were proposed. Based on the data of a user-side transformer and photovoltaic power generation, the cost under different strategies and the configuration scheme with the lowest cost is calculated. The example was used to analyze and compare the benefits under various strategies, and the results show it works in cost-saving. The strategy of similarity storage allocation has a positive effect on energy and cost-saving.

Integrated Management of Energy Storage for Sustainable Operation of Energy Microgrids

2011 ◽  
Author(s):  
Ratnesh K. Sharma ◽  
Koji Kudo
Keyword(s):  
Energy Storage ◽  
Smart Grids ◽  
Integrated Management ◽  
Operating Cost ◽  
Stable Operation ◽  
Distributed Energy ◽  
Government Grants ◽  
Sustainable Operation ◽  
Control And Management ◽  
The Cost

Energy microgrids are a key building block of smart grids. Energy microgrids can not only provide voltage and VAR support to the power grid but also reduce the emission footprint of the overall power generation infrastructure. While it provides added advantages like grid decongestion and reduced operating cost for system operators, it creates significant challenges in stable operation and meeting economic goals of the microgrid owners. Currently, energy microgrids are heavily subsidized through government grants/rebates and require high maintenance in terms of skilled operating staff and advance control systems. In this paper, we propose a microgrid energy storage architecture that could reduce the cost of ownership and simplify control and management of energy microgrids while retaining the advantages of reduced emissions and resource consumption. The controls existing in normal energy storage also offers unique opportunities in simplifying the control system of such distributed generation infrastructure and improving the reliability of microgrid in meeting local demand constraints. From a utility operator’s perspective, energy storage provides a reliable and dispatchable source as opposed to intermittent distributed energy resources.

scholarly journals Peak Shaving and Frequency Regulation Coordinated Output Optimization Based on Improving Economy of Energy Storage

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 29
Author(s):  
Daobing Liu ◽  
Zitong Jin ◽  
Huayue Chen ◽  
Hongji Cao ◽  
Ye Yuan ◽  
...  
Keyword(s):  
Energy Storage ◽  
Control Method ◽  
Economic Benefits ◽  
Economic Problem ◽  
Frequency Regulation ◽  
Cost Models ◽  
Optimization Strategy ◽  
Economic Optimization ◽  
Peak Shaving ◽  
Electricity Cost

In this paper, a peak shaving and frequency regulation coordinated output strategy based on the existing energy storage is proposed to improve the economic problem of energy storage development and increase the economic benefits of energy storage in industrial parks. In the proposed strategy, the profit and cost models of peak shaving and frequency regulation are first established. Second, the benefits brought by the output of energy storage, degradation cost and operation and maintenance costs are considered to establish an economic optimization model, which is used to realize the division of peak shaving and frequency regulation capacity of energy storage based on peak shaving and frequency regulation output optimization. Finally, the intra-day model predictive control method is employed for rolling optimization. An intra-day peak shaving and frequency regulation coordinated output optimization strategy of energy storage is proposed. Through the example simulation, the experiment results show that the electricity cost of the whole day is reduced by 10.96% by using the coordinated output strategy of peak shaving and frequency regulation. The obtained further comparative analysis results and the life cycle economic analysis show that the profit brought by the proposed coordinated output optimization strategy is greater than that for separate peak shaving or frequency modulation of energy storage under the same capacity.

Design and Simulation for Microgrid System Based on Homer Software

2011 ◽  
Vol 361-363 ◽  
pp. 1874-1877
Author(s):  
Lan Zhu ◽  
Xiu Yang
Keyword(s):  
Solar Wind ◽  
Energy Storage ◽  
Diesel Engine ◽  
Power Plant ◽  
Wind Power ◽  
Wind Power Plant ◽  
Distributed Energy ◽  
Power Resources ◽  
The Cost ◽  
Simulation Parameters

Aiming at some microgrid system in Shanghai, economic simulations and analyses are done. A microgrid including solar, wind power, microturbines, diesel engine, energy storage and other distributed power resources is constructed based on homer software and simulation parameters are set to make an optimum proposal. Further studies such as running on the grid, changing the cost of distributed energy and operating in the PV / wind power plant mode are discussed.

scholarly journals Optimization Strategy of Configuration and Scheduling for User-Side Energy Storage

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 120
Author(s):  
Yushan Liu ◽  
Qianqian Liu ◽  
Huaimin Guan ◽  
Xiao Li ◽  
Daqiang Bi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Optimization Model ◽  
Lithium Iron Phosphate ◽  
Economic Benefits ◽  
Forecast Errors ◽  
Loop Scheduling ◽  
Optimization Strategy ◽  
Scheduling Optimization ◽  
Power Fluctuations ◽  
The Impact

In order to reduce the impact of load power fluctuations on the power system and ensure the economic benefits of user-side energy storage operation, an optimization strategy of configuration and scheduling based on model predictive control for user-side energy storage is proposed in this study. Firstly, considering the cost and benefits of energy storage comprehensively, an energy storage configuration optimization model with the highest annualized net income as the goal is built to determine the parameters for configuring energy storage. Then, with the goal of maximizing the profit during the scheduling period, pre-month scheduling optimization model, day-ahead scheduling optimization model and intra-day scheduling optimization model are established. The goal of the pre-month scheduling optimization model is to determine the maximum monthly demand; part of the scheduling results in the day-ahead scheduling optimization model directly participate in the intra-day scheduling; the intra-day rolling optimization relies on the advantages of real-time feedback and closed-loop scheduling to smooth out power fluctuations caused by load forecast errors. Finally, the configuration and economic benefit of lithium iron phosphate batteries, lead-carbon batteries and sodium-sulfur batteries are analyzed and compared, and scheduling analysis is performed. The simulation results show that the proposed optimization method can cut peaks and fill valleys, ensure the economic benefits of users, and provide guidance for users to invest in energy storage.

scholarly journals STORAGE SCHEDULING SCHEME FOR DISTRIBUTED ENERGY GENERATION SOURCES

2019 ◽  
Vol 1 (02) ◽  
pp. 93-102
Author(s):  
Nayana Shetty
Keyword(s):  
Energy Storage ◽  
Storage Systems ◽  
Renewable Energy Sources ◽  
Magnetic Core ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Energy Storage Systems ◽  
Distributed Energy Generation ◽  
The Cost

Innumerable methods of generating, delivering and consuming electricity has become very prominent in the recent days due to the emergence of the distributed energy resources that are comprised of renewable energy sources and the energy storage systems. The prevailing energy storage systems for the distributed energy resources has its own challenges that are related to the methods of storage, the cost of the storage and their functioning. So the paper puts forward a novel energy accumulator that is supported by a rotating magnetic core as storage for the distributed energy resources. The proposed method brings down the operational, technical and financial complexities in storage of the distributed energy resources.

scholarly journals Energy Storage Economic Analysis of Multi-Application Scenarios in an Electricity Market: A Case Study of China

2020 ◽  
Vol 12 (20) ◽  
pp. 8703
Author(s):  
Zhixian Wang ◽  
Ying Wang ◽  
Qia Ding ◽  
Chen Wang ◽  
Kaifeng Zhang
Keyword(s):  
Energy Storage ◽  
Economic Analysis ◽  
Electricity Market ◽  
The United States ◽  
Economic Benefits ◽  
Market Mechanism ◽  
Frequency Regulation ◽  
Power Stations ◽  
Price Levels ◽  
The Cost

Energy storage has attracted more and more attention for its advantages in ensuring system safety and improving renewable generation integration. In the context of China’s electricity market restructuring, the economic analysis, including the cost and benefit analysis, of the energy storage with multi-applications is urgent for the market policy design in China. This paper uses an income statement based on the energy storage cost–benefit model to analyze the economic benefits of energy storage under multi-application scenarios (capacity, energy, and frequency regulation markets) in China’s future electricity market. The results show that the economic benefits of energy storage can be improved by joining in the capacity market (if it exists in the future) and increasing participation in the frequency regulation market. Nevertheless, the benefits under multi-application scenarios can hardly guarantee the cost recovery of energy storage under the current market mechanism or at the current price levels. Moreover, the economic benefits under different subsidy policies are studied, and the results show that energy storage can recover the cost with appropriate subsidy policies (the subsidy of 0.071 USD/kWh for pumped storage power stations is sufficient while the subsidy of 0.142 USD/kWh is required for electrochemical power stations). Finally, the sensitivity analysis of an energy storage power station to different price levels is carried out considering the difference in electricity price between China and the United States.

scholarly journals An Outreach Rehabilitation Program for Nursing Home Residents After Hip Fracture May Be Cost-Saving

2020 ◽  
Vol 75 (10) ◽  
pp. e159-e165
Author(s):  
Lauren A Beaupre ◽  
Doug Lier ◽  
Jay S Magaziner ◽  
C Allyson Jones ◽  
D William C Johnston ◽  
...  
Keyword(s):  
Nursing Home ◽  
Hip Fracture ◽  
Cost Saving ◽  
Incremental Cost ◽  
Usual Care ◽  
Nursing Home Residents ◽  
Rehabilitation Program ◽  
Study Entry ◽  
Rehabilitation Intervention ◽  
The Cost

Abstract Background We compared the cost-effectiveness of 10 weeks of outreach rehabilitation (intervention) versus usual care (control) for ambulatory nursing home residents after hip fracture. Methods Enrollment occurred February 2011 through June 2015 in a Canadian metropolitan region. Seventy-seven participants were allocated in a 2:1 ratio to receive a 10-week rehabilitation program (intervention) or usual care (control) (46 intervention; 31 control). Using a payer perspective, we performed main and sensitivity analyses. Health outcome was measured by quality-adjusted life years (QALYs), using the EQ5D, completed at study entry, 3-, 6-, and 12-months. We obtained patient-specific data for outpatient visits, physician claims, and inpatient readmissions; the trial provided rehabilitation utilization/cost data. We estimated incremental cost and incremental effectiveness. Results Groups were similar at study entry; the mean age was 87.9 ± 6.6 years, 54 (71%) were female and 58 (75%) had severe cognitive impairment. EQ5D QALYs scores were nonsignificantly higher for intervention participants. Inpatient readmissions were two times higher among controls, with a cost difference of −$3,350/patient for intervention participants, offsetting the cost/intervention participant of $2,300 for the outreach rehabilitation. The adjusted incremental QALYs/patient difference was 0.024 favoring the intervention, with an incremental cost/patient of −$621 for intervention participants; these values were not statistically significant. A sensitivity analysis reinforced these findings, suggesting that the intervention was likely dominant. Conclusion A 10-week outreach rehabilitation intervention for nursing home residents who sustain a hip fracture may be cost-saving, through reduced postfracture hospital readmissions. These results support further work to evaluate postfracture rehabilitation for nursing home residents.

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