A power grid partitioning optimization method based on fractal theory

Li, Hongzhong; Zhang, Xinyu; Han, Wenhua; Li, Yingchuang; Kang, Aimin

doi:10.1002/etep.2741

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…The experimental data showed that pore morphology could combine with diffusion coefficient to diagnose the laziness change of diffusion. Li et al (2019) applied fractal theory to power grid planning and control, and proposed a power grid topology method based on fractal theory, which is used to prove the fractal characteristics of power grid, and can quickly identify power grid faults, which played a promoting role in power grid production. Joveini and Sadri (2018) applied fractal theory to complex biological networks and proposed a new algorithm.…”

Section: Literature Reviewmentioning

confidence: 99%

RETRACTED ARTICLE: Research on service level analysis method of container terminal’s logistics system based on fractal self-similarity theory

et al. 2021

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Based on the fractal self-similarity theory, this paper puts forward the service level analysis method of container terminal's logistics system. Based on the detailed study of container terminal's logistics system, firstly, the self-similarity characteristics of container terminal' logistics system are extracted to verify the applicability of fractal theory to container terminal's logistics system. Secondly, the simulation analysis model is established, which measures the service level of container terminal's logistics system from nine indicators, such as annual throughput, average service time of the ships, average ship-time efficiency, average utilization rate of berths, average daily occupancy rate of container yard, etc. The simulation model is applied to a container terminal, and the results show that the model can not only evaluate the overall service level of the container terminal, but also analyze the influence of different storage time and ship inter-arrival time on the service level of the terminal, so as to provide the basis for the terminal operation decision. The constructed model is a useful tool for assessing the validity of ideas about the functional interrelationships between the dry port's primary parameters, as well as the system's long-term viability.

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Section: Literature Reviewmentioning

confidence: 99%

RETRACTED ARTICLE: Research on service level analysis method of container terminal’s logistics system based on fractal self-similarity theory

et al. 2021

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“…Weighted least squares method (WLS) is the most widely used state estimation method in the power system. It can eliminate the interference of random Gaussian errors and achieve unbiased estimation of true values [20][21][22].…”

Section: An Improved DC Methods Of Short-circuit Current Partitioningmentioning

confidence: 99%

A Power Grid Partitioning Method for Short-Circuit Current Considering Multi-Scenario Security with an Improved Direct Current Model

Zhang,

Guo,

Shi

et al. 2023

Energies

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In order to ensure the security of power grids and control the level of short-circuit currents, a multi-objective optimization method for power grid partitioning is proposed. This method takes into consideration both short-circuit currents and multi-scenario safety constraints. A power grid partitioning optimization model is established to achieve objectives such as minimizing disconnected lines, maximizing safety margins, and ensuring load balance in the main transformers. The model aims to satisfy constraints related to short-circuit current levels, base-case power flow, and N − 1 security. To address the significant deviation in the static security constraint model caused by large amounts of active power losses in large-scale power grids, an improved direct current model is proposed to reduce these errors and meet the accuracy requirements for grid partitioning optimization. Additionally, to adapt to the variability of renewable energy output, an optimization method is proposed, combining three scenarios of renewable energy generation while satisfying short-circuit current and static security constraints. The power grid partitioning model is mathematically formulated as a large-scale mixed-integer linear programming problem, which presents challenges in terms of hardware requirements and computational complexity when solved directly. To mitigate these challenges, equivalent WARD values are assigned to the short-circuit current constraints, base-case constraints, and anticipated fault-induced power flow constraints. Anticipated faults and bottleneck branches are accurately incorporated, and the problem is decomposed into smaller-scale mixed-integer linear programming problems, solved in a stepwise iterative manner. This approach significantly improves computational efficiency and meets the requirements of practical large-scale power grid applications. To validate the proposed model and algorithm, a simulation program is developed using C++, and a simulation analysis of a regional transmission network is conducted. The program ensures the correctness of the proposed model and demonstrates the effectiveness of the algorithm.

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A fractal-theory-based multi-agent model of the cyber physical production system for customized products

Wei

Zhang

2023

Journal of Manufacturing Systems

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A power grid partitioning optimization method based on fractal theory

Cited by 4 publications

References 27 publications

RETRACTED ARTICLE: Research on service level analysis method of container terminal’s logistics system based on fractal self-similarity theory

RETRACTED ARTICLE: Research on service level analysis method of container terminal’s logistics system based on fractal self-similarity theory

A Power Grid Partitioning Method for Short-Circuit Current Considering Multi-Scenario Security with an Improved Direct Current Model

A fractal-theory-based multi-agent model of the cyber physical production system for customized products

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