- 标题
- 摘要
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- 实验方案
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High Sensitivity Detection of Copper Ions in Oysters Based on the Fluorescence Property of Cadmium Selenide Quantum Dots
摘要： Enhancing the mass transport from the flow field side to the membrane side without sacrificing the active surface area is a critical strategy for the design of electrodes in flow-field structured vanadium redox flow batteries (VRFBs). In this work, we design and prepare a novel porous electrode with a gradient distribution in pores, enabling a gradual decrease in permeability but an increase in active surface areas from the flow field side to the membrane side. This design not only increases the electrode utilization due to the enhanced mass transport near the flow field side, but also avoids the loss of active surface area near the membrane side. Numerical modeling results show that compared to the conventional electrode design, the gradient electrode design can promote the uniform distribution of local reaction current density and overpotential, leading to a lower charge voltage and higher discharge voltage. Experimental results show that at the current density of 240 mA cm?2, the battery with the gradient electrode design delivers a 69% higher discharge capacity than that with the conventional electrode design, demonstrating the superiority of the gradient electrode design strategy.
关键词： Gradient porous electrode,Large-scale energy storage,Mass transport,Vanadium redox flow batteries
更新于2025-09-11 14:15:04
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[IEEE 2018 5th International Conference on Information, Cybernetics, and Computational Social Systems (ICCSS) - Hangzhou (2018.8.16-2018.8.19)] 2018 5th International Conference on Information, Cybernetics, and Computational Social Systems (ICCSS) - RBF Neural Network Adaptive PID Control for Energy Storage System in Grid-Connected Photovoltaic Microgrid
摘要： In photovoltaic microgrid, the output power of PV array will change with the change of external light and temperature. In order to maintain the stability of output power of PV system, energy storage system is usually added into the system. In a energy storage system, the most widely used control method is proportional-integral-derivative (PID) based control, however, the control effect of PID control is dependent on parameter tuning. In this paper, a PID controller based on adaptive radial basis function (RBF) neural network is proposed to adjust the PID parameters adaptively, and improve the response speed, anti-interference ability and robustness of the traditional PID controller. In the end, the energy storage system is built in the MATLAB/Simulink software, which is applied to the 100kW photovoltaic array to stabilize the output power when the light and temperature changed.
关键词： adaptive control,energy storage system,photovoltaic microgrid,RBF neural network,PID control
更新于2025-09-11 14:15:04
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[IEEE IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - Washington, DC (2018.10.21-2018.10.23)] IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - Photovoltaic and Energy Storage Grid Integration with Fully Modular Architecture using Triple Port Active Bridges and Cascaded H-Bridge Inverter
摘要： This paper presents a novel architecture to integrate the photovoltaic and energy storage to the grid. The modular approach is provided by using the triple port active bridge DC-DC converter modules and the cascaded H-Bridge multilevel inverter structures. The modular approach helps in easy scaling up, easy maintenance and better controllability of the available power. The triple port bridge is capable of supplying and receiving power in any of its ports, allowing various control modes. Also the voltage control mode at its output allows for additional grid services. The cascaded H-bridge is a multilevel inverter with higher number of voltage levels, reduced ?lter size, lower switching frequency, lower dv/dt and EMC issues. The experimental and simulation results presented in this paper ensures that the proposed architecture is suitable for large scale photovoltaic and energy storage grid integration.
关键词： ZVS,cascaded H-bridge,Photovoltaic,Energy storage,triple port,Modular,multi-level
更新于2025-09-11 14:15:04
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An Alcohol-Soluble Polymer Electron Transport Layer Based on Perylene Diimide Derivatives for Polymer Solar Cells
摘要： Modular multilevel converter with integrated battery energy storage system (MMC-BESS) has been proposed for energy storage requirements in high-voltage applications with large-scale renewable energy resources. The MMC-BESS is essentially a three-port converter which can transfer energy between any two of the ac port, dc port, and BESS, constituting multimode operation of the system. Different from conventional MMCs, the state-of-charge (SOC) inconsistency among batteries would magnify the submodule capacitor voltage unbalance issue in the MMC-BESS. In this study, an improved capacitor voltage balancing method applicable for multimode operation of MMC-BESS is proposed by adjusting ac and dc modulation indexes simultaneously. After that, the ratio of ac and dc modulation indexes is optimised to enhance the tolerance of unbalanced power among SMs within phase arm, greatly improving the SOC equalisation rate. Based on the proposed capacitor voltage balancing method, the control structure is given and the dynamic model is conducted for the analytic design of the closed-loop controller. Finally, the simulations and experimental results validate the effectiveness and feasibility of the proposed control strategy.
关键词： SOC equalisation,Multimode operation,Modular multilevel converter,Battery energy storage system,Capacitor voltage balancing
更新于2025-09-11 14:15:04
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[IEEE 2019 Eleventh International Conference on Ubiquitous and Future Networks (ICUFN) - Zagreb, Croatia (2019.7.2-2019.7.5)] 2019 Eleventh International Conference on Ubiquitous and Future Networks (ICUFN) - Pricing-based shared energy storage optimization for residential users with photovoltaic generation system and demand-side load management
摘要： In this paper, we investigate a problem of optimal capacities of energy storage system for the residential users and an optimal unit price energy storage system for an aggregator. We suppose that the residential users have own photovoltaic generation system and a smart meter which can schedule activation of home appliances and controls. The aggregator participates in energy market to maximize his pro?t by selling the storage to the residential users. Each user determines his energy consumption schedule and a required amount of storage to minimize his energy cost depending on the unit price of energy storage, price pro?le of electricity from the main grid and his renewable power generation capacity. We consider electricity bill from main grid and storage bill from the aggregator as users’ energy cost. We formulate a problem for the aggregator to decide an optimal unit price of energy storage and a problem for each user to decide energy consumption schedule and a required amount of storage capacity. With numerical investigation, it is shown that the energy storage can reduce the energy load to main grid and shave peak power. As a result, by purchasing energy storage, users can save their energy cost by 43% in average compared to the case without energy storage.
关键词： home load management,Energy storage system,aggregator,residential photovoltaic generation,smart grids
更新于2025-09-11 14:15:04
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[IEEE 2017 14th IEEE India Council International Conference (INDICON) - Roorkee, India (2017.12.15-2017.12.17)] 2017 14th IEEE India Council International Conference (INDICON) - Power Management In Solar PV Fed Microgrid System With Battery Support
摘要： Installation of renewable resources at single phase residential premises calls on for the need of power management and coordination control of operating system. System is divided components which includes, solar PV maximum power point tracking (MPPT) via boost converter, bi-directional DC-DC converter for battery charging applications, and bidirectional AC-DC converter for feeding AC loads, etc.,. This paper, the solar PV alongside with battery power elaborates management scenario so as to form a sophisticated residential consumer system capable of operating in both grid forming (or, islanded) and feeding (or, grid connected) modes. System is tested via PSCAD based simulation platform, for operation in varying operating modes such that the power could be fed from DC to AC microgrid and vice-versa. DC-AC converter operating in closed loop sine pulse width modulation (SPWM) scheme, is used to control AC side voltage while operating in islanded mode. It works in rectification mode during grid connected mode. In day time, system is in islanded mode where excess / deficit power is exchanged with energy storage unit (ESU). In evening or night time, it operates in grid connected mode so as to charge the ESU.
关键词： Converter control,power management,grid forming,energy storage unit,microgrid,grid feeding
更新于2025-09-11 14:15:04
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Submicron barium calcium zirconium titanate ceramic for energy storage synthesised via the co-precipitation method
摘要： Monodisperse submicron barium calcium zirconium titanate [(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3] powders with homogeneous spherical microstructure were synthesised via the co-precipitation method. The (Ba+Ca)/(Zr+Ti) molar ratio and concentrations of reactants and NaOH used in the synthesis process were adjusted to obtain a single phase. Thermogravimetric analysis, X-ray diffraction, infrared and Raman spectroscopies and transmission electron microscopy were used to analyse the phase formation temperature, crystalline structure and reaction mechanism of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 formation at room temperature. The results suggested that the pure perovskite phase formation temperature was approximately 900–950 °C, which is considerably lower than that of BCZT powders synthesised using the conventional solid-state reaction (1250 °C). The dense phase-pure ceramics synthesised at 1320 °C displayed high recoverable energy storage performance (0.25 J/cm3) and breakthrough field (100 kV/cm). This work provides a new strategy to lower the synthesis temperature and improve the electrical properties of perovskites as well as revealing a possible formation mechanism.
关键词： Mechanism,Energy storage,Submicron BCZT powders,Co-precipitation method
更新于2025-09-11 14:15:04
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A Novel Mode-Based Energy Storage Control Approach for Residential PV Systems
摘要： This paper presents a novel mode-based energy storage control approach. Assuming that an energy storage device (ESD) is equipped with a set of predetermined real-time control modes, the dispatch objective is to select an optimal mode instead of a continuous charging or discharging power value. A two-stage algorithm is developed for mode selection. In the first stage, a sliding 24-hour economic model predictive control (EMPC) algorithm is used to determine the power outputs of the ESD for the next 24 hours. In the second stage, the output sign for the next time step determines the class of modes to be selected (charging or discharging). The information from the first stage is used to compute the total cost for each selected mode. The mode with the lowest day-ahead cost is chosen. The residential electricity consumption data collected in the PECAN Street Project is used in the simulation to validate the performance of the proposed algorithm. Simulation results show that using a mode-based approach reduces the sensitivity to forecasting errors along with load and solar variability. The algorithm performance is consistent across different load patterns.
关键词： forecasting errors,residential PV systems,control modes,energy storage,economic model predictive control
更新于2025-09-11 14:15:04
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AGC of PV-thermal and hydro-thermal energy systems using CES and a new multi-stage FPIDF-(1+PI) controller
摘要： The interconnected power system with renewable energy sources is an intricate nonlinear system, which frequently brings light to the serious problem of the system frequency and tie-line power fluctuations due to deficient damping under severe and dynamically changing loading conditions. Primarily, the power system generation-demand equilibrium point amendments following a contingency and in this case, it is stiffer to recapture a tolerable equilibrium point via conventional control practices. To overcome this problem, advanced control techniques and fast acting energy storage systems (ESS) are requisite. The ESS such as capacitive energy storage (CES) units have tremendous capability in preserving the generation-demand balance and perpetuating the power grid frequency by effective damping of the power-frequency oscillations caused due to the sudden and variable load disturbances in power system. Hence, the impact of CES units in automatic generation control (AGC) of interconnected power system is analysed and contrasted critically in this paper. Motivated by the fact that fuzzy control techniques display superior performance under volatile operating conditions in contrast to conventional control strategies, this paper also proposes a new design of intelligent multi-stage fuzzy assisted PID with filter-(1+PI) i.e., FPIDF-(1+PI) controller to enhance the conduct of AGC of power system. Initially, a linear model of two-area photovoltaic-reheat thermal system is considered and a maiden attempt is made to optimize the parameters of FPIDF-(1+PI) controller utilizing imperialist competition algorithm. The ascendancy of the proposed controller is substantiated by comparing the outcomes with PI/FPI/FPIDF controller based on various existing optimization techniques. It is observed that CES units installed in each control area sustain the area controller to restore the area frequency and tie-line power deviations adequately and hastily following a step load disturbance in an area. To exhibit the potency and scalability of CES and the proposed controller over other prevalent control methods, the study is also extended to a multi-unit multi-source hydro-thermal power system. Finally, robustness of the proposed controller with/without CES is validated under large changes in the system parameters and random load demands. Hence, the proposed approach asserts better and vigorous results to supply reliable and high-quality electric power to the end user.
关键词： automatic generation control,capacitive energy storage,robust controller,Energy system,PV system,optimized FLC
更新于2025-09-10 09:29:36
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[Lecture Notes in Electrical Engineering] Proceedings of 2018 Chinese Intelligent Systems Conference Volume 528 (Volume I) || Control Strategy of PV-Hybrid Energy Storage Device Based on Household Load
摘要： In order to improve the stability and economy of roof photovoltaic system. The frequency distribution of photovoltaic power can be obtained by using Hilbert-Huang transform (HHT), and a boundary frequency algorithm is proposed to determine the frequency of photovoltaic power generation. Then, the roof photovoltaic-hybrid energy storage control model based on household load is constructed, and the model is solved by LINGO software. Data analysis and comparison show that under the condition of full life cycle and real time price of photovoltaic power generation, user economy is superior to that of fixed price condition. The effectiveness of the proposed model coordination control strategy is verified by the user’s economy.
关键词： Hybrid energy storage,Maximum power point tracking,Capacity configuration,Energy management,Control strategy,Photovoltaic power generation
更新于2025-09-10 09:29:36