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It was found that the stored energy, exergy efficiency and heat transfer rate of the PBTES system with cascaded three-PCMs were higher than those of the non-cascaded PBTES system during the cyclic charging and discharging processes.
This study proposes a novel fully distributed coordination control (DCC) strategy to coordinate charging efficiencies of energy storage systems (ESSs). To realize this fully DCC strategy in an active distribution system (ADS) with high penetration of intermittent renewable generation, a two-layer consensus algorithm is proposed and
The energy storage charging pile achieved energy storage benefits through charging during off-peak periods and discharging during peak periods, with benefits ranging from 646.74 to 2239.62 yuan. At an average demand of 90 % battery capacity, with 50–200 electric vehicles, the cost optimization decreased by 16.83%–24.2
This paper investigates the energy efficiency of Li-ion battery used as energy storage devices in a micro-grid. The overall energy efficiency of Li-ion battery depends on the energy efficiency under charging, discharging, and charging-discharging conditions. These three types of energy efficiency of single battery cell
they have become electric vehicles'' essential energy storage systems [[4], [5], [6]]. The charging and discharging efficiency is related to the internal resistance of the battery, which is calculated with the formula proposed by Yang F et al. [59]. Fig. 3
For an important special case with full charging/discharging efficiency and all EVs available for charging at the initial period, Fast MPC-based coordination of wind power and battery energy storage systems J. Energy Eng., 138 (2)
The losses in the PEU were measured between 0.88% and 16.53% for charging, and 8.28% and 21.80% for discharging, reaching the highest losses of any EV or building components. Generally, with some exceptions, percentage losses are higher at lower current, more consistently for charging than discharging.
Basic objectives of the proposed DCC for ESSs are: ① to coordinate the ESSs and improve efficiency using associated marginal charging costs (MCCs) in a
To describe such a transient problem at off-design conditions, firstly, solar energy will be taken to explain what the variability of renewables means for a CCES system. The solar energy intensity in three successive days in November 2020 is given in Fig. 1 from the Duren Tiga weather station at PLN Research Institute, Indonesia [34], and the
If the BESS always operates at a constant charging and discharging power, due to the maximum and minimum capacity constraints of BESS, it may appear the following situations: 1) when the load in Fig. 1 (a) does not reach the lowest point in the valley period, the BESS in Fig. 1 (b) has reached its maximum allowable charging capacity.
5.1. Data description and parameter setting To get close to reality, a case study is conducted using real data from Car2go and the solar radiation intensity in Portland, Oregon, collected by the National Renewable Energy Laboratory (NREL). Portland is
This article focuses on the distributed battery energy storage systems (BESSs) and the power dispatch between the generators and distributed BESSs to supply electricity and
The efficiency, durability, and health of the energy storage system components depend on controlling the power flow subjected to proper operational constraints. Improved Energy Management Algorithm With Time-Share-Based Ultracapacitor Charging/Discharging for Hybrid Energy Storage System | IEEE
Under the background of charging and discharging large-scale electric vehicles connected to the power grid, how to make full use of the load and energy storage properties of electric vehicle batteries, reduce the number of
This paper presents a method for obtaining individual one-way charging and discharging efficiencies dependent on the charging/discharging power. The method consists of two parts. First, the roundtrip cycle efficiency is experimentally obtained for different pairs of charging and discharging power rates.
4 · The energy storage demonstrates its charge–discharge flexibility, charging during the night and at noon, and discharging at 8 am and 6 pm, achieving "low storage
In this paper, a two-stage optimization strategy for electric vehicle charging and discharging that considers elasticity demand response based on particle
6 · With the increasing adoption of electric vehicles (EVs), optimizing charging operations has become imperative to ensure efficient and sustainable mobility. This study proposes an optimization
1 · Thermal energy storage (TES) is a key technology to facilitate the integration of renewable energy sources and heat pumps into energy systems. It allows capturing, storing, and releasing thermal energy efficiently for later use, which contributes to reducing dependence on fossil fuels and promoting greater sustainability.
The energy storage revenue has a significant impact on the operation of new energy stations. In this paper, an optimization method for energy storage is proposed to solve the energy storage configuration problem in new energy stations throughout battery entire life cycle. At first, the revenue model and cost model of the energy
1 · However, how to schedule MC to achieve higher charging efficiency with less mobile charging cost, Chen S., Jiang C., Li J., Xiang J., Xiao W., Improved deep Q
This study delves into the exploration of energy efficiency as a measure of a battery''s adeptness in energy conversion, defined by the ratio of energy output to
In this paper we provide non-simultaneous charging and discharging guarantees for a linear energy storage system (ESS) model for a model predictive control (MPC) based home energy management system (HEMS) algorithm. The HEMS optimally controls the residential load and residentially-owned power sources, such as photovoltaic
The stable, efficient and low-cost operation of the grid is the basis for the economic development. The amount of power generation and power consumption must be balanced in real time. Traditionally the grid needs to quickly detect the electrical load of users in real time and adjust the power generation to maintain the balance between electrical supply and
There, Yalmip and CPLEX are used in methods 2–4 to solve the charging and discharging strategy of energy storage, and the operating efficiency of the energy storage is set to a constant 0.98. All the costs of energy storage are converted when calculating the capacity attenuation cost of energy storage, the average annual
This review presents a first state-of-the-art for latent heat thermal energy storage (LHTES) operating with a simultaneous charging-discharging process (SCD). These systems combine the thermal behaviour of a storage with a phase change material (PCM) and the behaviour of a heat exchanger with heat transfer between two heat
Ceramic capacitors designed for energy storage demand both high energy density and efficiency. Achieving a high breakdown strength based on linear dielectrics is of utmost importance. In this study, we present the remarkable performance of densely sintered (1–x)(Ca 0.5 Sr 0.5 TiO 3)-xBa 4 Sm 28/3 Ti 18 O 54 ceramics as energy
As a result, high energy storage density and discharge efficiency are achieved at x/y = 0.07/0.02, giving the large storage density of 1.83 J/cm 3 and high discharging efficiency of 70%. The present work presents a feasible strategy to develop energy storage materials based on perovskite ferroelectrics by the partial substitutions
Renewable resources, including wind and solar energy, are investigated for their potential in powering these charging stations, with a simultaneous exploration of
Here, we show that fast charging/discharging, long-term stable and high energy charge-storage properties can be realized in an artificial electrode made from a
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