In recent years, machine learning techniques have been applied to test the fault type in high-voltage circuit breakers (HVCBs). Most related research involves improving classification method for higher precision. Nevertheless, as an important part of diagnosis, feature information description vibration signal HVCB has neglected; particular, its diversity and significance are rarely considered many real-world fault-diagnosis applications. Therefore, this paper, a hybrid transformation is...

By collecting and organizing historical data typical model characteristics, hydrogen energy storage system (HESS)-based power-to-gas (P2G) gas-to-power systems are developed using Simulink. The transfer mechanisms numerical modeling methods of the proposed studied in detail. integrated HESS covers following components: alkaline electrolyzer (AE), high-pressure tank with compressor (CM & H2 tank), proton-exchange membrane fuel cell (PEMFC) stack. unit models established based on U-I curves...

With the high proportion of new energy access and increasing demand for load electricity, efficient reasonable control battery storage systems (BESS) in power grid is key to promoting consumption, improving quality economy supply grid. To solve optimization problem BESS under multiple service objectives, a two-stage method based on multi-service attribute utility evaluation has been proposed this paper. Firstly, various demands operation constraints, multi-objective optimized scheduling...

The output–voltage–power curves of photovoltaic (PV) arrays exhibit complex multi-peak shapes when local shading occurs. existing maximum power point tracking (MPPT) algorithms to solve this problem do not consider the possibility failures due time irradiance change. In study, first, reason for failure global MPPT (GMPPT) algorithm is analyzed based on PV array mathematical model and its output characteristics under partial conditions; then, in order estimate MPP voltage, an artificial...

Mechanical faults of high-voltage circuit breakers (HVCBs) always happen over long-term operation, so extracting the fault features and identifying type have become a key issue for ensuring security reliability power supply. Based on wavelet packet decomposition technology random forest algorithm, an effective identification system was developed in this paper. First, compared with incomplete description Shannon entropy, time-frequency energy rate (WTFER) adopted as input vector classifier...

As a kind of widely used switchgear in power system, the reliability gas insulated (GIS) is very important for safe operation systems. However, there lack research on intelligent detection technology mechanical state GIS at present. A new method urgently needed to improve operability, effectiveness, and accuracy fault GIS. Aiming abnormal vibration signals generated by faults, this article presents diagnosis (GA-DBSCAN) consisting feature selection based genetic algorithm (GA) Density-Based...

The coupling of renewable energy sources with electrolyzers under stand-alone conditions significantly enhances the operational efficiency and improves cost-effectiveness as a technologically viable sustainable solution for green hydrogen production. To address configuration optimization challenge in hybrid electrolyzer systems integrating alkaline water electrolysis (AWE) proton exchange membrane (PEME), this study proposes an innovative methodology leveraging morphological analysis Pareto...

Mechanical faults of high-voltage circuit breakers (HVCBs) always occur during long-term operation; thus, the recognition such fault types has become a key issue. Now, most related research involves improvements to classification method for higher precision based on single sensor, ignoring multi-sensor information fusion vibration signal diagnosis HVCB. Classical evidence theory is common approach solving fusion. However, it fails upon encountering conflicting evidence. Therefore, this study...

The integration of Electric Vehicles (EV) and diverse energy users in an Integrated Energy System (IES) poses a key challenge IES optimization dispatch. This paper presents dispatch method that incorporates EV zoning electricity prices multi-objective weight optimization. Firstly, the power flow calculation is integrated into dispatch, establishing comprehensive network model considers electricity, gas, heat. Next, innovative Regional Time Use Price (RTOU) developed based on regional...

The reliability of gas insulated switchgear (GIS) is very important for the safe operation power systems. However, research on potential faults GIS mainly focused partial discharge, and intelligent detection technology mechanical state scarce. Based abnormal vibration signals generated by a fault, fault diagnosis method consisting frequency feature extraction based coherent function (CF) multi-layer classifier was developed in this paper. First, Fourier transform used to analyze differences...

Photovoltaic (PV) systems have non-linear characteristics that generate maximum power at one particular operating point. Environmental factors such as irradiance and temperature variations greatly affect the point (MPP). Diverse offline online techniques been introduced for tracking MPP. Here, to track MPP, an augmented-state feedback linearized (AFL) controller combined with artificial neural network (ANN) is proposed. This approach linearizes in PV DC/DC converters, optimizing system...

Abstract Evaluating the mechanical state of high-voltage circuit breakers (HVCBs) based on vibration information has currently become an important research direction. In contrast to unicity travel–time and current–time curves, from different positions is diverse. These differences are often overlooked in HVCB fault identification applications. Additionally, recognition results location vary, conflicting diagnosis directly cause accurate type fail. Therefore, this paper, a novel...

Mechanical fault diagnosis of high-voltage circuit breakers (HVCB) is great significance for grid safety. However, as evaluation data diagnosis, most relevant studies considered only a single-signal type with one-sided information. Furthermore, when using the Mel frequency cepstrum coefficient (MFCC) algorithm to extract features from signals, traditional equally spaced framing method does not match characteristics HVCB action mechanism. Therefore, this study combines travel, vibration, and...

To address the issue of multiobjective control in multienergy systems with diverse operational objectives, a two-stage optimization framework based on expected point tolerance has been proposed this paper. In first stage, single objective function is used for to obtain problem. Then, second by defining allowable deviation between each and point, original problem transformed into solution measurement. Finally, simulation scene system, it demonstrated that compared optimal results under...

DC microgrid systems that integrate energy distribution, storage, and load units can be viewed as examples of reliable efficient power systems. However, the isolated operation microgrids, in case a power-grid failure, is key factor limiting their development. In this paper, we analyze six typical modes an off-grid based on photovoltaic storage system (PV-ESS), well operational characteristics different comprise microgrid, from perspective balance. We also distributed control techniques for...

To address the problems of difficult online monitoring, low recognition efficiency and subjectivity work condition identification in mineral flotation processes, a foam performance state method is developed to improve issues mentioned above. This combines multi-dimensional CNN (convolutional neural networks) characteristics improved LBP (local binary patterns) characteristics. We have divided conditions into six categories. First, multi-directional multi-scale selectivity anisotropy...

Intermediate-frequency power technology is widely used in aircraft power-supply systems. This paper studies the appearance and motion of vacuum plasmas an axial magnetic field (AMF) butt contacts at 360-800 Hz. Under influence AMF, electrons travel a cylindrical spiral, which advantageous for maintaining arc diffusion. The experimental results show that when contact separation was 3 mm, arcs were uniformly distributed diffused AMF contacts. We found maximum pinch pressure column...

Due to the complexity of state change mechanism lithium batteries, there are problems such as difficulties in aging characterization. Establishing a assessment model for batteries can reduce its safety risk energy storage power station applications. Therefore, this paper proposes method establishing battery including resistance under combination digital and analog, uses time-frequency time–frequency domain test analysis establish impedance expression realize parameterization process...

With the increasing maturity of large-scale new energy power generation and shortage storage resources brought about by increase in penetration rate future, development electrochemical technology construction demonstration applications are imminent. In view characteristics different battery media technical problems applications, structure systems summarized. On this basis, analyzed examples their internal structures analyzed. And role played grid, finally was summarized prospected.

The high performance of medium-voltage direct current (MVDC) power supply system is a pre-requisite for several industrial applications. To meet the higher voltage (DC) breaking requirements in fields aviation, aerospace, and new energy, this article proposes novel MVDC commutation topology that combines load-carrying branch an arcing parallel. In contrast to conventional structure based on semiconductor devices, each proposed contains mechanical contact, which provides lower on-state loss...