Qingjun Peng
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View article: Prediction of Magnetic Fields in Single-Phase Transformers Under Excitation Inrush Based on Machine Learning
Prediction of Magnetic Fields in Single-Phase Transformers Under Excitation Inrush Based on Machine Learning Open
With the digital transformation of power systems, higher demands are being placed on smart grids for the timely and precise acquisition of the status of transmission and transformation equipment during operational and maintenance processes…
View article: Deep Learning Model for Magnetic Field Prediction of Transformers Under Overvoltage Conditions
Deep Learning Model for Magnetic Field Prediction of Transformers Under Overvoltage Conditions Open
The transformer is an important equipment in power systems. However, prolonged abnormal conditions can lead to significant damage of the transformer equipment. The current finite element analysis (FEA) method for calculating the internal p…
View article: Top-Oil Temperature Prediction of Power Transformer Based on Long Short-Term Memory Neural Network with Self-Attention Mechanism Optimized by Improved Whale Optimization Algorithm
Top-Oil Temperature Prediction of Power Transformer Based on Long Short-Term Memory Neural Network with Self-Attention Mechanism Optimized by Improved Whale Optimization Algorithm Open
The operational stability of the power transformer is essential for maintaining the symmetry, balance, and security of power systems. Once the power transformer fails, it will lead to heightened instability within grid operations. Accurate…
View article: Harmonic voltage phasor reconstruction and harmonic state estimation based on the measurement data of a capacitive voltage transformer
Harmonic voltage phasor reconstruction and harmonic state estimation based on the measurement data of a capacitive voltage transformer Open
Harmonic state estimation, which highly depends on accurate synchronised phasors, is a crucial basis for the location, traceability, and governance of harmonics in power systems. However, most existing synchronous phasor measurement units …
View article: Research into the Fast Calculation Method of Single-Phase Transformer Magnetic Field Based on CNN-LSTM
Research into the Fast Calculation Method of Single-Phase Transformer Magnetic Field Based on CNN-LSTM Open
Magnetic field is one of the basic data for constructing a transformer digital twin. The finite element transient simulation takes a long time and cannot meet the real-time requirements of a digital twin. According to the nonlinear charact…
View article: Power Transformer On-Load Capacity-Regulating Control and Optimization Based on Load Forecasting and Hesitant Fuzzy Control
Power Transformer On-Load Capacity-Regulating Control and Optimization Based on Load Forecasting and Hesitant Fuzzy Control Open
The operational stability of a power transformer exerts an extremely important impact on the power symmetry, balance, and security of power systems. When the grid load fluctuates greatly, if the load factor of the transformer cannot be mai…
View article: Defect Prediction for Capacitive Equipment in Power System
Defect Prediction for Capacitive Equipment in Power System Open
As a core component of the smart grid, capacitive equipment plays a critical role in modern power systems. When defects occur, they pose a significant threat to the safety of both other equipment and personnel. Hence, it is of great signif…
View article: Transformer fault classification for diagnosis based on DGA and deep belief network
Transformer fault classification for diagnosis based on DGA and deep belief network Open
Power transformer plays a very important role in power system, its long-term operation will cause various kinds of faults. Accurate identification and timely elimination of transformer faults are the basis of safe operation of power grid. …
View article: Harmonic Voltage Phasor Reconstruction and Harmonic State Estimation Based on the Measurement Data of a Capacitive Voltage Transformer
Harmonic Voltage Phasor Reconstruction and Harmonic State Estimation Based on the Measurement Data of a Capacitive Voltage Transformer Open
Harmonic state estimation, which highly depends on accurate synchronized phasors, is a crucial basis for the location, traceability, and governance of harmonics in power systems. However, most existing synchronous phasor measurement units …
View article: Fine-grained similarity semantic preserving deep hashing for cross-modal retrieval
Fine-grained similarity semantic preserving deep hashing for cross-modal retrieval Open
Cross-modal hashing methods have received wide attention in cross-modal retrieval owing to their advantages in computational efficiency and storage cost. However, most existing deep cross-modal hashing methods cannot employ both intra-moda…
View article: Outlier detection and data filling based on KNN and LOF for power transformer operation data classification
Outlier detection and data filling based on KNN and LOF for power transformer operation data classification Open
The missing and abnormal data in power transformer operation and monitoring greatly affect the accuracy of fault diagnosis and thus threaten the stable operation of power systems. To conduct outlier detection and improve data quality for s…
View article: Mass Appraisal of Urban Housing Based on GIS and Deep Learning
Mass Appraisal of Urban Housing Based on GIS and Deep Learning Open
View article: Investigation on Temperature Rise Characteristic and Load Capacity of Amorphous Alloy Vegetable Oil Distribution Transformers with 3D Coupled-Field Method
Investigation on Temperature Rise Characteristic and Load Capacity of Amorphous Alloy Vegetable Oil Distribution Transformers with 3D Coupled-Field Method Open
The large differences in the load peak and valley of rural distribution networks always bring severe problems to system planners and operators. Given this issue, this paper deals with the hot-spot temperature (HST) of the transformer and i…
View article: Morphological Characteristics of Molybdenum Disulfide and Current Application on Detecting SF6 Decomposing Products
Morphological Characteristics of Molybdenum Disulfide and Current Application on Detecting SF6 Decomposing Products Open
MoS2 has been considered a potential novel material in various fields due to its large specific surface area, high carrier mobility, and tunable electronic properties. However, with the increasing demand for sensor substrates, different st…
View article: Calculation model for the earth potential of HVDC ground electrode based on image recognition of surface-layer soil moisture
Calculation model for the earth potential of HVDC ground electrode based on image recognition of surface-layer soil moisture Open
Changes in soil electrical parameters can affect the distribution of earth potential in high-voltage direct-current (HVDC) ground electrodes when climatic conditions changes. This paper proposes a model to describe the relationship between…
View article: Hydrothermal Synthesis of Flake-Flower NiO and Its Gas Sensing Performance to CO
Hydrothermal Synthesis of Flake-Flower NiO and Its Gas Sensing Performance to CO Open
In this work, flake-flower NiO was successfully prepared via a facile hydrothermal method. The microstructure of the synthesized sample was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmissi…
View article: Physicochemical Characteristics and Dynamic Charge Mapping in Thermally Aged Two-Layered Polymer Considering Surface States: Experiment and Simulation
Physicochemical Characteristics and Dynamic Charge Mapping in Thermally Aged Two-Layered Polymer Considering Surface States: Experiment and Simulation Open
Under operational conditions of high electric fields and elevated temperatures, the accumulation of space charges at multilayer insulation interfaces is often considered as an important factor affecting insulation performance. This study e…
View article: First-Principles Insight Into Au-Doped MoS2 for Sensing C2H6 and C2H4
First-Principles Insight Into Au-Doped MoS2 for Sensing C2H6 and C2H4 Open
C2H6 and C2H4 gases are two typical decompositions produced by partial discharge of transformer oil. To fully evaluate the feasibility of MoS2-based materials for the detection of C2H6 and C2H4 gases, the adsorption of C2H6 and C2H4 molecu…