Design, simulation, and experiment research on fast control system of steam turbine inlet valve

Liu, Ying; Yin, Xiaoju; Yi, Yunlong; Li, Xiaoxiao; Wang, Liming

doi:10.1177/09544089211043971

Cited by 2 publications

(3 citation statements)

References 20 publications

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“…In the industry's early days, steam turbines were controlled utilizing mechanical and hydraulic adjustment systems and electrical hydraulic adjustment [4]. Due to steam turbines' increased capacity and function, the original mechanical-hydraulic and electro-hydraulic control systems are unsustainable [5].…”

Section: Introductionmentioning

confidence: 99%

Intelligent diagnosis and prediction of turbine digital electro-hydraulic control system faults: Design and experimentation

Zhong,

2023

PLoS ONE

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A physical modeling approach was adopted to build a Digital Electro-Hydraulic Control (DEH) system simulation model and the fault models using the SIMULINK tool. This research combined the advantages of the gray system and neural network to build a multi-parameter gray error neural network fault prediction model for the first time. Furthermore, an embedded platform for intelligent fault diagnosis and prediction was developed using an Application Specific Integrated Circuit chip. The results show that the simulation model of the DEH system has good performance. A jam fault, internal leakage, and a device fault could be accurately identified through the fault diagnosis model. The multi-parameter gray error neural network prediction model improves the accuracy of fault prediction. The embedded platform developed by the Application Specific Integrated Circuit chip solves the problem of transmission limitation and insufficient computing power. It realizes the intelligent diagnosis and prediction of DEH system faults and guarantees the regular operation of the DEH system.

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Section: Introductionmentioning

confidence: 99%

Intelligent diagnosis and prediction of turbine digital electro-hydraulic control system faults: Design and experimentation

Zhong,

2023

PLoS ONE

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“…A range of investigations took the advantages of CFD to study the performances of the hydraulic proportional valves. [16][17][18][19][20] Why would the strange phenomenon of the high-flow valve appear and how to deal with it? They will be revealed and discussed gradually.…”

Section: Introductionmentioning

confidence: 99%

“…A range of investigations took the advantages of CFD to study the performances of the hydraulic proportional valves. 16–20…”

Section: Introductionmentioning

confidence: 99%

Design, failure analysis, and optimization of a high-flow water valve: A case study

Liao

Tao

Zi-sheng

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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An 800-L/min high-flow water cartridge poppet valve with the commonly used single feed channel was designed to meet the moving speed of the hydraulic powered roof support in the coal mine. Mathematical model was used to explore the dynamic displacement of the valve, and the experimental displacement was measured to verify the accuracy of the simulation value. However, an interesting phenomenon occurred that the experimental opening and closing time of the valve becomes longer and longer with the increase of flow, even vibration appears when the flow is up to 800 L/min, and the simulation error is also getting bigger. To find the reason and solutions, the computational fluid dynamics technology is used. It is discovered that the valve is subjected to radial imbalanced force that is not considered in the initial mathematical model, which leads to big simulation error at high flow condition. Then, the new mathematical model is proposed. The relative simulation error of the response time decreases to 11.7% from 33.3% in the opening process and decreases to 4.6% from 76.9% in the closing process at 800 L/min. A symmetrical dual channel is designed to improve the performance of the valve. The imbalanced force on the dual-channel valve is 63.9% lower than that of the original valve, and the corresponding opening and closing time decreases by 37.5% and 69%, respectively. Furthermore, a double channel valve with auxiliary passage is proposed for super high flow valves. The innovation of this study is correcting the mathematical model by considering the additional radial imbalanced force induced by the asymmetrical flow channel of the valve. It is of great help to successful design of the 800-L/min water directional valve. The case study systematically provides reference for design, failure analysis, and optimization of new products in fluid engineering.

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Design, simulation, and experiment research on fast control system of steam turbine inlet valve

Cited by 2 publications

References 20 publications

Intelligent diagnosis and prediction of turbine digital electro-hydraulic control system faults: Design and experimentation

Intelligent diagnosis and prediction of turbine digital electro-hydraulic control system faults: Design and experimentation

Design, failure analysis, and optimization of a high-flow water valve: A case study

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