Determination of Maximum Acceptable Standing Phase Angle across Open Circuit Breaker as an Optimisation Task

Kacejko, P.; Miller, P.; Pijarski, Paweł

doi:10.3390/en14238105

Cited by 4 publications

(7 citation statements)

References 28 publications

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“…Kacejko et al in [2] tackle the problem of optimizing a standing phase angle when closing circuit breakers in high voltage electrical power systems. This problem is closely related to the power system transient stability assessment and associated transitional generator shaft torque vibrations.…”

Section: A Short Review Of the Contributions In This Issuementioning

confidence: 99%

Machine Learning in Power System Dynamic Security Assessment

Sarajčev

2022

Energies

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Section: A Short Review Of the Contributions In This Issuementioning

confidence: 99%

Machine Learning in Power System Dynamic Security Assessment

Sarajčev

2022

Energies

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“…Different approaches to minimization are proposed; e.g., [6] proposes that the higher the sensitivity, the higher the participation logic during regulation activities. We can also find an implementation of methods that look for the external (safe) angle of the switching value [11].…”

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confidence: 99%

“…The OPF algorithms in the process of reducing the switching angle were also used in [13]. The objective function is the required difference of angles at two selected points of the network.…”

mentioning

confidence: 99%

“…The task to be solved is the minimization of the objective function described by Formula (6). In [13], one of the heuristic optimization methods, namely, the simulated annealing method, was used to obtain a solution.…”

mentioning

confidence: 99%

“…Some of these methods also allow load shutdowns in case the change in generator loads does not lead to the expected solutions. The literature review can be summarized by citing examples of the calculations presented in [13]. The calculations were performed on the Polish power system model for a switched off 400 kV power line, for which the permissible switching angle was assumed equal to 20 • .…”

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confidence: 99%

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Switching Operations in 110 kV Networks in the Context of Synchro-Check and Mitigation of Switching Stress by Utilizing Proper Control of Renewables and Energy Storages

Łowczowski,

Miller,

Udzik

et al. 2023

Energies

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Synchro-check (SC) relays are devices that control synchronization between different fragments of power system networks. Synchronism is monitored by controlling the voltage amplitude, angle, and frequency differences. The goal of monitoring is to avoid dangerous transients after the circuit breaker (CB) closing, which occur when the differences between the voltage, angle, and frequency at both sides of the CB are above the threshold. Although the idea of SC is straightforward, one needs to realize that blocking of the CB closing may cause even more severe issues, i.e., the deterioration of power system stability and safety. The conflicting goals of the switching operation result in many different interpretations, regarding the recommended settings and utilization of the SC relays in different locations of power system networks. The paper presents considerations connected with switching operations in power systems, in particular, in 110 kV networks. Different problems connected with switching operations are highlighted and described. Moreover, the switching-relevant parameters and switching constraints are provided. Further, the simulation results connected with switching operations are presented, the realistic possible voltage and angle differences before switching operations are provided, and the impacts of mitigation measures—renewables and energy storage—are estimated. Finally, the proposed procedures and algorithms of switching stress mitigation are provided.

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Advanced Optimisation and Forecasting Methods in Power Engineering—Introduction to the Special Issue

2023

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Modern power engineering is struggling with various problems that have not been observed before or have occurred very rarely. The main cause of these problems results from the increasing number of connected distributed electricity sources, mainly renewable energy sources (RESs). Therefore, energy generation is becoming more and more diverse, both in terms of technology and location. Grids that have so far worked as receiving networks change their original function and become generation networks. The directions of power flow have changed. In the case of distribution networks, this is manifested by power flows towards transformer stations and further to the network with a higher voltage level. As a result of a large number of RESs, their total share in the total generation increases. This has a significant impact on various aspects of the operation of the power system. Voltage profiles, branch loads, power flows and directions of power flows between areas change. As a result of the random nature of RES generation, there are problems with the quality of electricity, source stability issues, branch overloading, voltage exceedances and power balance. The occurrence of various types of problems requires the use of more and more advanced methods to solve them. This review paper, which is an introduction to the Special Issue Advanced Optimisation and Forecasting Methods in Power Engineering, describes and justifies the need to reach for effective and available mathematical and IT methods that are necessary to deal with the existing threats appearing in the operation of modern power systems. It indicates exemplary, current problems and advanced methods to solve them. This article is an introduction and justification for the use of advanced calculation methods and algorithms. Engineering intuition and experience are often not enough due to the size and complexity of power grid operation. Therefore, it becomes necessary to use methods based on artificial intelligence and other advanced solutions that will facilitate and support decision making in practice.

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Determination of Maximum Acceptable Standing Phase Angle across Open Circuit Breaker as an Optimisation Task

Cited by 4 publications

References 28 publications

Machine Learning in Power System Dynamic Security Assessment

Machine Learning in Power System Dynamic Security Assessment

Switching Operations in 110 kV Networks in the Context of Synchro-Check and Mitigation of Switching Stress by Utilizing Proper Control of Renewables and Energy Storages

Advanced Optimisation and Forecasting Methods in Power Engineering—Introduction to the Special Issue

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