Air pollution forecasting can provide reliable information about the future situation, which is useful for an efficient operation of air control and helps to plan prevention. Dynamics are usually reflected by various factors, such as temperature, humidity, wind direction, speed, snowfall, rainfall, so on, increase difficulty in understanding change pollutant concentration. In this paper, a short-term model based on deep learning proposed PM2.5 (particulate matter with aerodynamic diameter...

We propose an experimentally accessible single-photon routing scheme using a $△$-type three-level atom embedded in quantum multichannels composed of coupled-resonator waveguides. Via the on-demand classical field being applied to atom, router can extract single photon from incident channel, and then redirect it into another. The efficient function perfect reflection signal channel is rooted coherent resonance existence photonic bound states.

Integrated energy system is important for the high-efficient utilization of multitype systems. In this paper, stochastic optimal operation investigated micro integrated electric power, natural gas, and heat delivery (IPGHS). First, a low-carbon micro-IPGHS proposed with comprehensive consideration renewable generation, carbon-capture-based power-to-gas technology, combined power units. Second, scenario-based model to handle uncertainties in demand generation. model, transactions between...

This paper aims to model interdependencies between power systems and dispatching data networks, analyze the intricate impacts on cascading failures. The functions of communication networks are embedded into in China, thus we use paper. structures generally categorized two types: 1) double-star; 2) mesh. correlation nodes double-star is "degree degree," whereas betweenness" for mesh networks. Furthermore, interactive grids presented by a dynamic flow model. Taking IEEE 39-bus system China's...

This paper proposes an adaptive droop control (ADC) strategy for the voltage source converter (VSC) based multiterminal high direct current (VSC-MTDC) system, which enables VSC-station to provide frequency regulation onshore ac grids. A V-I-f characteristic is derived establish relationship between deviation and dc voltage. working with able adjust its reference autonomously according grid deviation. Thus, power flow of VSC-MTDC system will be redistributed more going injected into adjacent...

Accurate load forecasting is the key to economic dispatch and efficient operation of Multi-Energy System (MES). This paper proposes a combined method for MES based on Bi-directional Long Short-Term Memory (BiLSTM) multi-task learning. Firstly, this investigates multi-energy interaction mechanism multi-loads characteristics analyzes correlation in different seasons. Then, proposed, which focuses making full use coupling relationship among multiple loads. In model, loads are selected...

This paper proposes a low-carbon operation model for an energy hub (EH) that combines the distributionally robust optimization (DRO) method with Stackelberg game. Firstly, bilevel single-leader-multi-follower game is presented where EH leader while users and electric vehicles (EVs) are regarded as two followers. Then, Kullback-Leibler (KL) divergence-based DRO developed to deal uncertainty of renewable generation (RG) in EH. Besides, Karush–Kuhn–Tucker (KKT) conditions, strong duality...

Abstract The access of large‐scale distributed generation (DG) easily leads to energy imbalance in distribution network. To deal with this issue, paper proposes an optimal schedule method for network considering the participation source‐load‐storage aggregation groups (SAGs). Firstly, system model consisting layer and SAGs is established, objectives constraints each are also given. Secondly, fluctuation on load side, a forecasting based Adaboost integrated convolutional neural networks...

Knowledge of the precise water depth in shallow areas ocean is great significance to safe navigation ships and hydrographic surveying. Compared with traditional bathymetry, satellite remote sensing for determination makes it possible cover large by dynamic observation. In this paper, we conducted an optically bathymetric inversion study using a Stumpf empirical model, random forest neural network support vector machine model based on Sentinel-2 images Ganquan Dao measured bathymetry data. We...

This paper shows that associated control synthesis problems of Ramadge-Wonham type can be efficiently solved under mild technical restrictions, using elementary methods combined with linear integer programming. Both memoryless and dynamic state feedback are treated. Structural conditions provided which the controller computed in "closed-form," namely represented as a VDES or "generalized" (GVDES). The results applied to model an AGV system, adapted from work Holloway Krogh (1990).< <ETX...

With the rapid increase of renewable energy sources and power electronic converters in system, inertia system is declined stability problem more serious than ever before. In this paper, a virtual synchronous generator (VSG) control strategy proposed to enable voltage-source converter-based multiterminal high-voltage direct current (VSC-MTDC) damp low-frequency oscillation modes. Both rotational part governor are modeled VSG controller. The V <sup...

With the explosive growth of mobile data demand, fifth generation (5G) network would exploit enormous amount spectrum in millimeter wave (mmWave) bands to greatly increase communication capacity. There are fundamental differences between mmWave communications and existing other systems, terms high propagation loss, directivity, sensitivity blockage. These characteristics pose several challenges fully potential communications, including integrated circuits system design, interference...

In this paper, a flexible voltage control strategy, which takes good use of the distributed energy storage (DES) units, is proposed to enhance stability and robustness dc distribution network. The characteristics ac/dc interface in network are analyzed, virtual inertia capacitance given demonstrate interactive influence ac systems. strategy for DES located at microgrid or terminal bus designed based on characteristics, enabling respond both variation frequency change utility grid. A...

A robust coordination approach for the controller design of multiple high-voltage direct-current (HVDC) and flexible ac transmission systems (FACTS) wide-area controls (WACs) is presented in this paper has aim stabilizing interarea oscillation modes large-scale power systems. The suitable control signals, which are given to HVDC FACTS controllers, respectively, chosen from a large number candidate items. Then, sequential planned devices. This based on theory formulated as standard problem...

This letter proposes a two-layer active disturbance rejection control (ADRC) method with the compensation of estimated equivalent input disturbances (EID) for load frequency (LFC) multi-area interconnected power system. has capability rejecting effects random variations and parameter uncertainties, guaranteeing high dynamic performance. The state-space model LFC system is established. Then full-order generalized state observer (GSO) employed in ADRC to estimate EID. A stability condition...

Fast and reliable service restoration strategy is necessary to restore as many out-of-service loads possible in a short time. In this paper, mixed-integer second-order cone programming formulation proposed for of distribution network with distributed generations (DGs). This relaxes the original non-convex power flow equations into conic quadratic format. The employment relaxation great importance because it ensures quality obtained solution. formulated multi-objective optimization problem...

Ellipsoidal Fe₃O₄@CuSilicate nanorattles with larger aspect ratio exhibited polarization enhancement of microwave absorption.

With the development of high-speed and high-power electrified railway, power quality traction grid becomes more serious. In order to achieve three-phase balance grid, a modular multilevel converter (MMC)-based railway conditioner (RTPC) is studied, which characterized by cascaded structure. The RTPC consists four H-Bridge links output filter inductors, can be connected 27.5-kV feeders in co-phase supply system directly. This used for different kinds system, especially suited Scott system....

A fast and effective service restoration method is proposed for medium-voltage distribution system with distributed generators by combining intentional islanding of network reconfiguration to maximize out-of-service loads. The whole process divided into four stages: 1) matching schemes; 2) connectivity generators; 3) reconfiguration; 4) optimization load shedding. Whether the last three stages are executed or not depends on violations operational constraints. In accordance topological...

In this paper, a traveling wave based fault location method is proposed for distribution networks. Before occurs, an intrinsic distance difference matrix (IDDM) established on the characteristics of propagation and topology network. After fault, initial signals are decomposed into several mode function (IMF) by variational decomposition (VMD), first IMF signal analyzed teager energy operator (TEO) to determine arriving time waves. According double-ended arrival at all recorders, (FDDM)...

This paper presents a new solution of power quality management for the photovoltaic (PV) plant with transformer integrated filtering method. The innovation PV is that it contains two-stage station, which consists box-type filter and 110 kV grid-connected based on inductive reactor can be into as decoupled winding, so modular design passive realized. Inductive method applied in not only improves at point common coupling, but dampens harmonic resonance between grid. hierarchical structure...

A reagent-free electrochemical synthesis of valuable 1,2,4-triazolo[4,3-<italic>a</italic>]pyridines and related heterocycles was developed.