Optimal location of step-up transformer in radial distribution networks to enhance static voltage stability

Rouholamini, Mahdi; Wang, Caisheng; Mohammadian, Mohsen; Bahari, Alireza

doi:10.1002/etep.2557

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Every power flow study assumes that the system operates on a permanent basis. This means that you want to know the operating conditions of the system for some previously assumed conditions, such as constant load, constant generation and the invariant topology [36].…”

Section: Distribution System Modelingmentioning

confidence: 99%

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Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid

et al. 2021

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This paper proposes a computational process development capable of filling the electric power sector shortage regarding voltage non-conformities identification in electric distribution power grid accounting for loads dynamic behavior at medium and low voltages. Actual distribution power grid data are used, with georeferencing to signal voltage transgressions locations, generate a report with voltage transgression indices and financial reimbursement values provided by legislation. The methodology compares regulatory requirements and makes available in software some possible actions in an attempt to adjust voltage levels, avoiding inconvenience and penalties for energy utilities providers. The method involves a data extractor construction for electricity provider company’s databases, computer simulations and comparison of obtained results with values established in electricity quality control standards. Thus, finding non-conformity locations and determining network adjustments to correct tension indexes in permanent regulation. The proposal features a reduction in electricity utilities operating costs, increasing efficiency in operation and energy quality available to consumers.

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Section: Distribution System Modelingmentioning

confidence: 99%

“…Knowing that loads connected to distribution power grid vary over the hours of the day and cause variations in voltage, it is necessary to control these expected variations. To prevent this, one of the options is the transformers in primary substations that have On-Load Tap Changer (OLTC) [36].…”

Section: Main Actions For Electric Power Distribution Adjustmentmentioning

confidence: 99%

Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid

et al. 2021

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“…However, there is no recognized evaluation method. The research progress in the field of the relationship between voltage and power angle stability is slow [10][11][12]. In particular, the research on the conversion mechanism and its dominant factors is rare, and the related literature is very few.…”

Section: Introductionmentioning

confidence: 99%

Method of static stability dominant identification

Cui

Dai

et al. 2023

IET Generation Trans & Dist

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Two extreme cases of static stability are voltage stability and power angle stability. The general stability analysis only focuses on one of the voltage stability or power angle stability. The stability limit and state change are studied for a certain kind of stability characteristics. In this paper, the stability limits of static voltage and power angle are derived, respectively. Therefore, different stability characteristics and their interrelationships can be further studied. The index to judge the dominant stability characteristic is defined. The proposed index only needs the system wide-area measurement information to quickly and accurately judge the dominant static stability characteristics. The dominant instability (DI) characteristic index proposed in this paper is equal to 1 or −1, which can help to quickly identify whether the power angle stability or voltage stability is dominant. The effectiveness of the method is proved by a simple system.

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“…Under voltage load shedding (UVLS) is an emergency control and management procedure in a power distribution system, that leads to a voluntary power cut, for short periods of time, in order to preserve system stability. The inability of a power system to support overloads is the main reason for voltage instability, which is a local problem, but can lead to blackout 1‐3 . Thus, UVLS is an effective solution to preserve the system voltage stability against major faults and events 4 …”

Section: Introductionmentioning

confidence: 99%

An adaptive decentralized under voltage load shedding in distribution networks

Nemouchi

Tiguercha²,

Ladjici³

2020

Int Trans Electr Energ Syst

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Blackout around the world generally manifests due to the voltage instability on distribution networks following major overloads, therefore the activation of the protection devices via a load shedding strategy is necessary to avoid severe contingencies. This article aims is to develop a new approach for under voltage load shedding (UVLS) ensuring two primordial parameters of shedding strategy, its amount and its load priority. The main contribution of this work lies in the application of a neuroevolution algorithm to enhance the UVLS relays decisions in the distribution network, under a decentralized process. The proposed algorithm adapts the amount of the shed loads in each bus, in a cooperative manner, in order to maintain the voltage stability of the system, and in where the priority of UVLS is defined by two voltage stability indices (SI): voltage SI and voltage electrical distance in addition to the measured voltage deviation. The efficiency of the proposed approach is validated for several overload scenarios performed in 33‐bus IEEE distribution system, in where the performance of the proposed adaptive Load shedding outperforms the conventional scheme.

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Optimal location of step-up transformer in radial distribution networks to enhance static voltage stability

Cited by 4 publications

References 25 publications

Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid

Analysis and Adequacy Methodology for Voltage Violations in Distribution Power Grid

Method of static stability dominant identification

An adaptive decentralized under voltage load shedding in distribution networks

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