Optimal design of variable suspension parameters for variable-gauge trains based on the improved CRITIC method

Liu, Yumei; Hu, Ting; Hao, Zixu; Sheng, Jiaxiang

doi:10.1080/02533839.2023.2227877

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…In the CRITIC method, the objective weight of each indicator is calculated by the amount of information contained in the indicator data, which is expressed by the standard deviation and correlation coefficient between indicators. As an improvement of the entropy weight method, it fully expresses the volatility and conflict between indicators and has strong engineering practical value [33]. Therefore, in this paper, the CRITIC method is adopted to further quantify the above indicators to derive the evaluation scores of the PV hosting capacity of the distribution system under typical operating scenarios, and its specific calculation steps are described below:…”

Section: Critic Methodsmentioning

confidence: 99%

Evaluation Method for Hosting Capacity of Rooftop Photovoltaic Considering Photovoltaic Potential in Distribution System

Xu,

He,

Liu

et al. 2023

Energies

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Regarding the existing evaluation methods for photovoltaic (PV) hosting capacity in the distribution system that do not consider the spatial distribution of rooftop photovoltaic potential and are difficult to apply on the actual large-scale distribution systems, this paper proposes a PV hosting capacity evaluation method based on the improved PSPNet, grid multi-source data, and the CRITIC method. Firstly, an improved PSPNet is used to efficiently abstract the rooftop in satellite map images and then estimate the rooftop PV potential of each distribution substation supply area. Considering the safety, economy, and flexibility of distribution system operation, we establish a multi-level PV hosting capacity evaluation system. Finally, based on the rooftop PV potential estimation of each distribution substation supply area, we combine the multi-source data of the grid digitalization system to carry out security verification and indicator calculation and convert the indicator calculation results of each scenario into a comprehensive score through the CRITIC method. We estimate the rooftop photovoltaic potential and evaluate the PV hosting capacity of an actual 10 kV distribution system in Shantou, China. The results show that the improved PSPNet solves the hole problem of the original model and obtains a close-to-realistic rooftop photovoltaic potential estimation value. In addition, the proposed method considering the photovoltaic potential in this paper can more accurately evaluate the rooftop PV hosting capacity of the distribution system compared with the traditional method, which provides data support for the power grid corporation to formulate a reasonable PV development and hosting capacity enhancement program.

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Section: Critic Methodsmentioning

confidence: 99%

Evaluation Method for Hosting Capacity of Rooftop Photovoltaic Considering Photovoltaic Potential in Distribution System

Xu,

He,

Liu

et al. 2023

Energies

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show abstract

“…An optimal Latin hypercube design ensures that the selected sample points are uniformly distributed in the highdimensional space defined by the six input parameters, allowing for a more comprehensive study of sample point combinations and yielding better experimental results with fewer samples. Thus, an optimal Latin hypercube design was used for data sampling in this study [27].…”

Section: Process Of Analysismentioning

confidence: 99%

Multi-Objective Optimization of Bogie Stability for Minimum Radius Curve of Battery Track Engineering Vehicle

Shen,

Zhao,

Wang

et al. 2024

Applied Sciences

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A battery track engineering vehicle faces challenges such as derailment and other safety concerns when navigating an R20m minimum radius curve, primarily owing to its low vertical and horizontal stabilities. To address these issues, a methodology integrating genetic optimization algorithms with a rigid and flexible coupled multi-body dynamics simulation is proposed to optimize the primary suspensions of the bogie of the vehicle. Initially, a multi-objective optimization model combining rigid and flexible coupled multi-body dynamics of battery track engineering vehicles with a genetic optimization algorithm was formulated. Subsequently, the optimal Latin hypercube design was applied to analyze the sensitivity of vertical and horizontal stability to various suspension parameters. Finally, a non-dominated sorting genetic algorithm (NSGA-II) and an archive-based micro genetic algorithm (AMGA) were applied to optimize the primary suspensions to enhance stability. Consequently, a set of optimal suspension parameter combinations was obtained. A notable enhancement was observed in the lateral stability of the optimized battery track engineering vehicles by 23.33% and in the vertical stability by 3.5% when traversing the R20m minimum radius curve, thereby establishing a theoretical foundation for further improving the running safety of railway vehicles and resolving the shortcomings of less research on the smallest radius curve.

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Dynamic implementation and verification of the gauge changing function of high-speed variable gauge bogies

Liu,

Hu,

Wang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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The variable gauge bogie has become an effective method to resolve the different gauge problems existed in cross-country and inter-regional railroad transportation, for which the variable gauge function implementation and dynamic performance is investigated in high-speed variable gauge train. This study provides comprehensive analysis of the stress state of the vehicle’s key components during gauge changing and the motion characteristics of the unlocking-locking device under high-speed operation conditions. The analysis results prove the mechanical properties of key components meet the requirements of national standards, and the gauge changing action can be completed reliably during the gauge changing process. The phenomenon of slippage and resonance will not occur during normal operation, which can ensure the safe operation of the trains. A simulation model for the dynamics of a high-speed variable gauge train with a gauge width of 1435/1520 mm is established based on SIMPACK, which is used to analyse and verify the operational stability, quality and smoothness of the designed variable gauge train. The results indicate that all dynamic performance indices meet the operational requirements.

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Optimal design of variable suspension parameters for variable-gauge trains based on the improved CRITIC method

Cited by 4 publications

References 17 publications

Evaluation Method for Hosting Capacity of Rooftop Photovoltaic Considering Photovoltaic Potential in Distribution System

Evaluation Method for Hosting Capacity of Rooftop Photovoltaic Considering Photovoltaic Potential in Distribution System

Multi-Objective Optimization of Bogie Stability for Minimum Radius Curve of Battery Track Engineering Vehicle

Dynamic implementation and verification of the gauge changing function of high-speed variable gauge bogies

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