Abstract Zinc‐ion batteries (ZIBs) are regarded as a promising candidate for next‐generation energy storage systems due to their high safety, resource availability, and environmental friendliness. Nevertheless, the instability of Zn metal anode has impeded ZIBs from being reliably deployed in proposed applications. Specifically, dendrite formation hydrogen evolution reaction (HER) on surface significantly compromise Coulombic efficiency cycling stability ZIBs. In recent years, increasing...

Battery storage is usually employed in photovoltaic (PV) system to mitigate the power fluctuations due characteristics of PV panels and solar irradiance. Control schemes for PV-battery systems must be able stabilize bus voltages as well control flows flexibly. This paper proposes a comprehensive management (CAPMS) PV-battery-based hybrid microgrids with both ac dc buses, grid-connected islanded modes. The proposed CAPMS successful regulating frequency stably, controlling voltage each unit...

In this letter, a novel autonomous control framework “Grid Mind” is proposed for the secure operation of power grids based on cutting-edge artificial intelligence (AI) technologies. The platform provides data-driven, model-free and closed-loop agent trained using deep reinforcement learning (DRL) algorithms by interacting with massive simulations and/or real environment grid. learns from scratch to master grid voltage problem purely data. It can make (AVC) strategies support operators in...

Fault detection in photovoltaic (PV) arrays becomes difficult as the number of PV panels increases. Particularly, under low irradiance conditions with an active maximum power point tracking algorithm, line-to-line (L-L) faults may remain undetected because fault currents, resulting loss energy and potential fire hazards. This paper proposes a algorithm based on multiresolution signal decomposition for feature extraction, two-stage support vector machine (SVM) classifiers decision making....

This paper presents a detection scheme for DC side short-circuit faults of photovoltaic (PV) arrays that consist multiple PV panels connected in series/parallel configuration. Such are nearly undetectable under low irradiance conditions, particularly, when maximum power point tracking algorithm is in-service. If remain undetected, these can considerably lower the output energy solar systems, damage panels, and potentially cause fire hazards. The proposed fault based on pattern recognition...

Resource-abundant metal (e.g., zinc) batteries feature intrinsic advantages of safety and sustainability. Their practical feasibility, however, is impeded by the poor reversibility anodes, typically caused uncontrollable dendrite enlargement. Significant effort exerted to completely prevent dendrites from forming, but this seems less effective at high current densities. Herein, work presents an alternative regulation strategy forming tiny, homogeneously distributed, identical zinc facet...

Abstract Organic cathodes for aqueous zinc‐ion batteries (AZIBs) feature intrinsic flexibility and favorable kinetics, but they suffer from high solubility. Herein, a partial charge regulation strategy is deployed by designing small organic molecule with extended π ‐conjugated plane, namely benzo[i]benzo[6′,7′]quinoxalino[2′,3′:9,10]phenanthro[4,5‐abc]phenazine‐5,10,16,21‐tetraone (PTONQ). The equalization of active sites induced the plane PTONQ combined aromaticity renders low solubility,...

Abstract Layered vanadium oxides are promising cathode materials for zinc‐ion batteries (ZIBs) owing to their high capacity, but the sluggish electron/ion migration kinetics and structural collapse/dissolution severely limit Zn 2+ ‐storage performance. Herein, poly(3,4‐ethylenedioxythiophene) coated Mn ‐intercalated with rich oxygen vacancies (MnVOH@PEDOT) prepared as cathodes ZIBs. The PEDOT coating, synergistic vacancies, tailors electron conductivity, ‐intercalation enlarges interlayer...

In this paper, a reinforcement-learning-based online optimal (RL-OPT) control method is proposed for the hybrid energy storage system (HESS) in ac-dc microgrids involving photovoltaic systems and diesel generators (DGs). Due to low inertia, conventional unregulated charging discharging (C&D) of storages may introduce disturbances that degrade power quality performance, especially fast C&D situations. Secondary tertiary levels can optimize state charge reference HESS; however, they are...

The concept of peer-to-peer (P2P) trading, or transactive energy (TE), is gaining momentum as a future grid restructure. It has the potentials to utilize distributed resources (DERs), proactive demand side management (DSM), and infusion in information communication technologies (e.g., blockchain Internet Things (IoT)) for promoting technical economic efficiency system its entirety. An efficient market framework vital successful sustainable implementation such concept. This article proposes...

Large-scale wind and solar power integration are likely to cause a short-term mismatch between generation load demand because of the intermittent nature renewables. System frequency is therefore challenged. In recent years, it has been proposed that part residential can be controlled for regulation with little impact on customer comfort. This paper proposes thermostatic control strategy primary secondary regulation, in particular, using heating, ventilation, air-conditioning units electric...

Advantages of distributed control have been extensively discussed, while its impacts on microgrid performance and stability, especially in the case communication latency, not explicitly studied or fully understood. This paper addresses this gap by proposing a generalized theoretical framework for small-signal stability analysis evaluation microgrids using control. The proposed synthesizes generator load frequency-domain characteristics, primary secondary loops, as well latency into...

In this article, the real-time nonintrusive load-monitoring (NILM) problem with limited measurements, i.e., low sampling rate data, is investigated. NILM a technique to identify various types of appliances by analyzing voltage and current features collected sensors, such as smart outlets. It one most important topics in grid management optimization. Although recent methods developed several general models that can be used for scenarios, these algorithms either require high-frequency...

This paper presents a novel algorithm for recovering missing phasor measurement unit (PMU) data. Due to the low-rank property of PMU data, recovery can be formulated as matrix-completion problem. Based on maximum-margin matrix factorization, we propose an efficient algorithm, alternating direction method multipliers (ADMM), solving completion Compared existing approaches, proposed ADMM based does not need estimate rank target data and provides better performance in computation complexity....

Direct current (DC) building microgrids allow the integrations of DC distributed energy resources (DERs) and loads with a simpler topology elimination alternating (AC) system issues, such as frequency transients harmonics. Because domination power-electronics-interfaced generators, islanded in general present very low inertia, which reveals subtle stability threats to systems. In addition, conventional droop-based DER power-sharing mechanisms may suffer from poor accuracy bus voltage...

Line-to-Line (L-L) faults in Photovoltaic (PV) arrays prevent the PV system from producing maximum power, and if not cleared, may result serious energy revenue losses cause fire hazards. Maximum Power Point Tracking (MPPT), a technique employed to maximize power output of array at different irradiance level, potentially mask certain make them undetectable by protection devices, especially when these occur under low solar condition or with high fault impedance. This paper proposes an...

The rapid development of Internet-of-Things in smart grid has enabled millions grid-connected distributed controllable resources (DCR; e.g., electric vehicles, loads) to provide service the grid, such as frequency regulation and demand response. integration these DCRs may become a large virtual power plant network with various characteristics. This poses great challenges from both control management perspectives, computation/communication burden, optimization complexity, scalability...

Abstract Zn ion batteries (ZIBs) are a promising candidate in safe and low‐cost large‐scale energy storage applications. However, significantly deteriorated cycling stability of anode high depth charge or after long‐term quiescence impedes the practical application ZIBs. Aiming at above issue, spontaneous solid electrolyte interphase (SEI) formation 4 (OH) 6 SO ·xH 2 O (ZHS) on powder is achieved pure ZnSO by facile rational interface design. The stable ultrathin ZHS SEI plays crucial part...