Diyi Chen
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View article: Bending–Torsional Coupling Vibration of Hydro-Turbine Generator Unit Considering Gyroscopic Effect Under Multiple Excitations
Bending–Torsional Coupling Vibration of Hydro-Turbine Generator Unit Considering Gyroscopic Effect Under Multiple Excitations Open
In this study, a bending–torsional coupling vibration model of the hydro-turbine generator unit (HTGU) incorporating the gyroscopic effect is developed. Using numerical simulation grounded in the actual installation and operational paramet…
View article: Multi-Objective Sensitivity Analysis of Hydraulic–Mechanical–Electrical Parameters for Hydropower System Transient Response
Multi-Objective Sensitivity Analysis of Hydraulic–Mechanical–Electrical Parameters for Hydropower System Transient Response Open
Hydropower’s ability to start up and shut down quickly, combined with its flexible regulation characteristics, effectively alleviates frequency fluctuations caused by new energy sources, ensuring the safe and stable operation of the power …
View article: Study on the Vortex Characteristics and Wear of Centrifugal Pump Based on Field‐Force Coupling Method
Study on the Vortex Characteristics and Wear of Centrifugal Pump Based on Field‐Force Coupling Method Open
To examine the vortex and wear characteristics of high‐speed centrifugal pumps, a field force coupling method was employed via the Application Programming Interface (API) of Engineering Discrete Element Model (EDEM) software and Field Data…
View article: Analysis of Falling Object Impact and Fishing Net Drag for Subsea Integrated Fiberglass Protective Structures
Analysis of Falling Object Impact and Fishing Net Drag for Subsea Integrated Fiberglass Protective Structures Open
Objective: This study aims to improve the safety of subsea oil and gas production facilities by designing an integrated fiberglass protective structure. Glass fiber-reinforced materials, noted for their lightweight, high strength, and corr…
View article: Unlocking Mid-to-Long-Term Flexibility: Why Seasonal Pumped Storage Outperforms Conventional Pumped Storage in Wind-Solar Dominated Grids
Unlocking Mid-to-Long-Term Flexibility: Why Seasonal Pumped Storage Outperforms Conventional Pumped Storage in Wind-Solar Dominated Grids Open
View article: TOU-Aware energy dispatch for reservoir-constrained hybrid renewable systems via scenario-specific reinforcement learning enhanced with a heuristic policy
TOU-Aware energy dispatch for reservoir-constrained hybrid renewable systems via scenario-specific reinforcement learning enhanced with a heuristic policy Open
View article: Evaluating the Performance of Seasonal Pumped Hydro Storage Coordinated Operation with Cascade Hydropower Station Integrating Variable Renewable Energy
Evaluating the Performance of Seasonal Pumped Hydro Storage Coordinated Operation with Cascade Hydropower Station Integrating Variable Renewable Energy Open
View article: Optimizing Time-of-Use Arbitrage for Hybrid Pumped Storage Systems: A Real-Time Agent-Parallel Dispatch Anchored by Heuristic Policy
Optimizing Time-of-Use Arbitrage for Hybrid Pumped Storage Systems: A Real-Time Agent-Parallel Dispatch Anchored by Heuristic Policy Open
View article: Novel Paradigm for Voltage Regulation of Pumped-Storage Units: Coordinated Optimization of Multi-Unit Operation for Enhanced Transient Stability in Renewable-Dominated Grids
Novel Paradigm for Voltage Regulation of Pumped-Storage Units: Coordinated Optimization of Multi-Unit Operation for Enhanced Transient Stability in Renewable-Dominated Grids Open
View article: Stress Prediction Via Vmd-Gru-Attention for Fatigue Life Estimation in Pelton Turbine Runners
Stress Prediction Via Vmd-Gru-Attention for Fatigue Life Estimation in Pelton Turbine Runners Open
View article: Heuristic-Anchored Reinforcement Learning for Scenario-Specific Dispatch of Hybrid Energy Systems
Heuristic-Anchored Reinforcement Learning for Scenario-Specific Dispatch of Hybrid Energy Systems Open
View article: Synergistic Mechanism for Secure-Economic-Frequency Regulation Performance of Hydropower Units: Dynamic Load Dispatch Method with Zonal Constraints
Synergistic Mechanism for Secure-Economic-Frequency Regulation Performance of Hydropower Units: Dynamic Load Dispatch Method with Zonal Constraints Open
View article: Evaluating the Performance of Seasonal Pumped Hydro Storage Coordinated Operation with Cascade Hydropower Station Integrating Variable Renewable Energy
Evaluating the Performance of Seasonal Pumped Hydro Storage Coordinated Operation with Cascade Hydropower Station Integrating Variable Renewable Energy Open
View article: Optimization of fish-friendly bulb turbine based on orthogonal method and computational fluid dynamics
Optimization of fish-friendly bulb turbine based on orthogonal method and computational fluid dynamics Open
A high-performance, fish-friendly bulb turbine was developed in this study by optimizing a runner with spiral blades to enhance the flow passage for fish. The key aspect of this work is multi-objective optimization based on the orthogonal …
View article: Durability test study of laminated specimens for large glass fiber protective structures in seawater
Durability test study of laminated specimens for large glass fiber protective structures in seawater Open
The mechanical properties of glass fiber composite structures prepared by vacuum forming manufacturing process are influenced by various factors and have a certain degree of dispersion, resulting in unclear durability characteristics when …
View article: Enhancing The Economic Efficiency Of Cross-Regional Renewable Energy Trading Via Optimizing Pumped Hydro Storage Capacity
Enhancing The Economic Efficiency Of Cross-Regional Renewable Energy Trading Via Optimizing Pumped Hydro Storage Capacity Open
View article: Engineering Applications of Fiberglass Protective Covers for Oil and Gas Production Facilities in Submerged Sand Slope Areas
Engineering Applications of Fiberglass Protective Covers for Oil and Gas Production Facilities in Submerged Sand Slope Areas Open
View article: Durability Test Analysis of Glass Fiber Composite Structure in Seawater
Durability Test Analysis of Glass Fiber Composite Structure in Seawater Open
View article: Comprehensive Evaluation of the Flexibility of Hydro-Wind-Photovoltaic Power Generation System Based on Hierarchical-Entropy Method
Comprehensive Evaluation of the Flexibility of Hydro-Wind-Photovoltaic Power Generation System Based on Hierarchical-Entropy Method Open
View article: Beyond fixed-speed pumped storage: A comprehensive evaluation of different flexible pumped storage technologies in energy systems
Beyond fixed-speed pumped storage: A comprehensive evaluation of different flexible pumped storage technologies in energy systems Open
View article: New Approach to Quasi-Synchronization of Fractional-Order Delayed Neural Networks
New Approach to Quasi-Synchronization of Fractional-Order Delayed Neural Networks Open
This article investigates quasi-synchronization for a class of fractional-order delayed neural networks. By utilizing the properties of the Laplace transform, the Caputo derivative, and the Mittag–Leffler function, a new fractional-order d…
View article: Multi-step wind speed prediction based on LSSVM combined with ESMD and fractional-order beetle swarm optimization
Multi-step wind speed prediction based on LSSVM combined with ESMD and fractional-order beetle swarm optimization Open
Accurate and stable wind speed prediction can alleviate the uncertain impacts of wind power generation caused by nonlinear characteristics of wind speed, and then improve the reliability of wind power. In this paper, a hybrid model for win…
View article: A Novel Energy Performance Prediction Approach towards Parametric Modeling of a Centrifugal Pump in the Design Process
A Novel Energy Performance Prediction Approach towards Parametric Modeling of a Centrifugal Pump in the Design Process Open
Traditional centrifugal pump performance prediction (CPPP) employs the semi-theoretical and semi-empirical approaches; however, it can lead to many prediction errors. Considering the superiority of deep learning when applied to nonlinear s…
View article: Corrigendum to “The importance of flexible hydropower in providing electricity stability during China’s coal phase-out” [Appl. Energy 336 (2023) 120684]
Corrigendum to “The importance of flexible hydropower in providing electricity stability during China’s coal phase-out” [Appl. Energy 336 (2023) 120684] Open
View article: Dynamic information transfer in vibration signal applied to early fault detection of hydropower generation unit
Dynamic information transfer in vibration signal applied to early fault detection of hydropower generation unit Open
Early fault detection of hydropower generation unit (HGU) is of great significance for the safe operation of the hydropower plant. Most of the related research focuses on the decomposition and feature extraction of single vibration monitor…
View article: Clocking effect on the internal flow field and pressure fluctuation of PAT based on entropy production theory
Clocking effect on the internal flow field and pressure fluctuation of PAT based on entropy production theory Open
The high-quality development of energy is closely related to the efficiency of energy utilization, and improving the hydraulic performance of the pump as turbine ( PAT ) has become increasingly important. In order to explore the influence …
View article: The importance of flexible hydropower in providing electricity stability during China’s coal phase-out
The importance of flexible hydropower in providing electricity stability during China’s coal phase-out Open
View article: A fault diagnosis method of rotating machinery based on improved multiscale attention entropy and random forests
A fault diagnosis method of rotating machinery based on improved multiscale attention entropy and random forests Open
In order to precisely diagnose the fault type of rotating machinery, a fault diagnosis method for rotating machinery based on improved multiscale attention entropy and random forests is proposed in this study. Firstly, a nonlinear dynamics…
View article: Performance Assessment for Primary Frequency Regulation of Variable-Speed Pumped Storage Plant in Isolated Power Systems
Performance Assessment for Primary Frequency Regulation of Variable-Speed Pumped Storage Plant in Isolated Power Systems Open
Primary frequency regulation (PFR) is a crucial operating condition for PSPs to realise frequency modulation, and the effectiveness of PFR is significant to the stability of power system frequency. Several challenges and risks have been pr…
View article: Diagnostics of a hydraulic turbine failure
Diagnostics of a hydraulic turbine failure Open
This paper presents the failure analysis and diagnostic of a hydraulic turbine. Shortly after a maintenance revision the thrust bearing of the turbine was destroyed when the turbine was put into operation. The damaged bearing was examined …