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.

scholarly journals V2B/V2G on Energy Cost and Battery Degradation under Different Driving Scenarios, Peak Shaving, and Frequency Regulations

2020 ◽  
Vol 11 (1) ◽  
pp. 14 ◽  
Author(s):  
Alain Tchagang ◽  
Yeong Yoo
Keyword(s):  
Energy Cost ◽  
Economic Benefits ◽  
Frequency Regulation ◽  
Optimization Strategy ◽  
Peak Shaving ◽  
Vehicle To Grid ◽  
Electricity Cost ◽  
Battery State Of Charge ◽  
Battery Degradation ◽  
Operational Constraints

The energy stored in electric vehicles (EVs) would be made available to commercial buildings to actively manage energy consumption and costs in the near future. These concepts known as vehicle-to-building (V2B) and vehicle-to-grid (V2G) technologies have the potential to provide storage capacity to benefit both EV and building owners respectively, by reducing some of the high cost of EVs, buildings’ energy cost, and providing reliable emergency backup services. In this study, we considered a vehicle-to-buildings/grid (V2B/V2G) system simultaneously for peak shaving and frequency regulation via a combined multi-objective optimization strategy which captures battery state of charge (SoC), EV battery degradation, EV driving scenarios, and operational constraints. Under these assumptions, we showed that the electricity usage/bill can be reduced by a difference of 0.1 on a scale of 0 to 1 (with 1 the normalized original electricity cost), and that EV batteries can also achieve superior economic benefits under controlled SoC limits (e.g., when kept between the SoC range of SoCmin > 30% and SoCmax < 90%) and subjected to very restricted charge-discharge battery cycling.

scholarly journals Ultracapacitors for Port Crane Applications: Sizing and Techno-Economic Analysis

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2091 ◽  
Author(s):  
Mostafa Kermani ◽  
Giuseppe Parise ◽  
Ben Chavdarian ◽  
Luigi Martirano
Keyword(s):  
Energy Storage ◽  
Fast Response ◽  
Economic Benefits ◽  
Container Terminals ◽  
Load Factor ◽  
Peak Reduction ◽  
Peak Demand ◽  
Peak Shaving ◽  
Suggested Approach ◽  
Load Leveling

The use of energy storage with high power density and fast response time at container terminals (CTs) with a power demand of tens of megawatts is one of the most critical factors for peak reduction and economic benefits. Peak shaving can balance the load demand and facilitate the participation of small power units in generation based on renewable energies. Therefore, in this paper, the economic efficiency of peak demand reduction in ship to shore (STS) cranes based on the ultracapacitor (UC) energy storage sizing has been investigated. The results show the UC energy storage significantly reduce the peak demand, increasing the load factor, load leveling, and most importantly, an outstanding reduction in power and energy cost. In fact, the suggested approach is the start point to improve reliability and reduce peak demand energy consumption.

scholarly journals Energy Storage Economic Optimization Scheduling Method for Multi-Scene Demand of Peak and Frequency Modulation

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8605
Author(s):  
Wen Wei ◽  
Yali Wang ◽  
Shuangfeng Dai ◽  
Changqing Chen ◽  
Lei Chen
Keyword(s):  
Energy Storage ◽  
Frequency Modulation ◽  
Control Method ◽  
Recovery Period ◽  
Operating Cost ◽  
Utilization Rate ◽  
Net Income ◽  
Economic Optimization ◽  
Scheduling Method ◽  
Optimization Scheduling

energy storage (ES) only contributes to a single-scene (peak or frequency modulation (FM)) control of the power grid, resulting in low utilization rate and high economic cost. Herein, a coordinated control method of peak modulation and FM based on the state of ES under different time scales is proposed. Firstly, for monotone peak and FM control scenarios, the ES configuration and scheduling model is constructed with the goal of maximizing net profit. Secondly, to further improve the ES utilization rate and optimize the operating cost of ES, a cooperative control method of peak modulation and FM is proposed. This method can realize the switch between peak modulation and FM control of ES and improve the ES utilization rate and system economy. Finally, the simulation results show that, compared with that of mono-peak and single-FM control, the ES efficiency of the peak-FM multiscenario optimization scheduling method is improved by 16.25% and 37.29%, respectively. The annual net income is increased by €28,021.50, the investment recovery period is shortened by 0.27 years, and the ES configuration economy is effectively improved.

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 Design and simulation analysis of high-temperature heat-storage combined-circulation system

Clean Energy ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 841-852
Author(s):  
Hongwei Zhang ◽  
Junqing Liu ◽  
Wenbin Liang ◽  
Hongqing Shan ◽  
Jie Wang
Keyword(s):  
High Temperature ◽  
Simulation Analysis ◽  
Thermal Storage ◽  
Economic Benefits ◽  
Combined Cycle ◽  
Circulation System ◽  
Peak Shaving ◽  
Continuous Increase ◽  
Electricity Cost ◽  
Cycle Simulation

Abstract In view of the continuous increase in the proportion of renewable energy connected to the grid in China and the increasing peak-to-valley difference in electricity demand on the power grid, this paper proposes a high-temperature thermal-storage combined-cycle power-generation system. Using Thermoflex thermal simulation analysis software, a high-temperature thermal-storage combined-cycle simulation analysis system model was established, and the influence of different initial temperatures and pressure ratios on the combined-cycle system was analysed. Sensitivity analysis of factors such as electricity cost, annual operating hours, initial equipment investment, unit efficiency and other factors that affect the net income of the system was carried out. According to the current power-peak-shaving auxiliary service market in China, it is pointed out that high-temperature thermal-storage combined-cycle projects must be profitable and obtain good economic benefits. The results obtained, on the one hand, provide suggestions for the flexibility and transformation of current gas-fired steam generators for peak shaving and, on the other hand, provide references for the subsequent development of high-temperature thermal-storage combined-cycle demonstration projects.

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