High Ohmic Reactor as a Shunt Limiter (HOR-SL) Method for Ferroresonance Elimination in the Distribution System

Abdel-hamed, Alaa M.; El-Shafhy, Mohamed M.; Badran, Ebrahim A.

doi:10.1109/access.2022.3231190

Cited by 8 publications

(4 citation statements)

References 42 publications

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“…The foundational concepts of Capacitor Coupled Substations (CCS) have been firmly established and extensively explored in recent years [1] [2] [3]. The core operational principle of a CCS is based on traditional capacitor voltage transformers (CVT), commonly used for measurement and protective functions within power utility systems [4].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Transients in Capacitor Coupled Substations Using Traditional RLC Filter Techniques

Nene,

Abe,

Nnachi

2024

JPEE

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This article presents an extensive examination and modeling of Capacitor Coupled Substations (CCS), noting some of their inherent constraints. The underlying implementation of a CCS is to supply electricity directly from high-voltage (HV) transmission lines to low-voltage (LV) consumers through coupling capacitors and is said to be cost-effective as compared to conventional distribution networks. However, the functionality of such substations is susceptible to various transient phenomena, including ferroresonance and overvoltage occurrences. To address these challenges, the study uses simulations to evaluate the effectiveness of conventional resistor-inductor-capacitor (RLC) filter in mitigating hazardous overvoltage resulting from transients. The proposed methodology entails using standard RLC filter to suppress transients and its associated overvoltage risks. Through a series of MATLAB/Simulink simulations, the research emphasizes the practical effectiveness of this technique. The study examines the impact of transients under varied operational scenarios, including no-load switching conditions, temporary short-circuits, and load on/off events. The primary aim of the article is to assess the viability of using an established technology to manage system instabilities upon the energization of a CCS under no-load circumstances or in case of a short-circuit fault occurring on the primary side of the CCS distribution transformer. The findings underscore the effectiveness of conventional RLC filters in suppressing transients induced by the CCS no-load switching.

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Section: Introductionmentioning

confidence: 99%

Mitigation of Transients in Capacitor Coupled Substations Using Traditional RLC Filter Techniques

Nene,

Abe,

Nnachi

2024

JPEE

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“…On the other hand, the elimination of ferroresonance is explored in [6] where a switching control by using coefficients of the proportional-integral (PI) controller is utilized to suppress the ferroresonance. In [7] an inductive superconducting fault current limiter is proposed, and more recently in [8] a method to reduce the ferroresonace overvoltage is : proposed by using High Ohmic Reactor (HOR) as a Shunt Limiter (SL). That technique is based on the measurements of the negative sequence components.…”

Section: Introductionmentioning

confidence: 99%

Ferroresonance Modeling and Analysis in Underground Distribution Feeders

Torres-García,

Solís-Ramos,

González-Cabrera

et al. 2023

IEEE Open J. Power Energy

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Nowadays, many modern electrical power systems are designed for transmission and distribution using underground systems. Such systems minimize visual impact, reduce congestion, and increase security and reliability. However, the technology utilized has increased the capacitance effect, which can lead to the system being more susceptible to the occurrence of the ferroresonance phenomenon. Ferroresonance can cause dielectric or thermal damage and consequently makes the system susceptible to faults in the electrical power equipment and installations. This paper analyzes the ferroresonance phenomenon after switching maneuvers in a real underground distribution feeder to detect possible conditions of ferroresonance. The analysis is carried out in a typical underground distribution system with distribution transformers connected in wye-grounded/wye-grounded (Ynyn), and modeled using the ATP/EMTP software.

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“…The ferroresonance phenomenon, as an unwanted nonlinear energy resonance in the power system, is not only accompanied by high voltages, but can also adversely distort waveforms and cause the thermal failure and dielectric breakdown of the equipment, and the false operation of the protection systems [14]. So far, numerous power system failures and interruptions as a result of ferroresonance have been reported.…”

Section: Introductionmentioning

confidence: 99%

Innovative Solid-State Ferroresonance-Suppressing Circuit for Voltage Transformer Protection in Wind Generation Systems

Bakhshi,

Bigdeli,

Moradlou

et al. 2023

Energies

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Ferroresonance, as an undesirable disturbance, leads to significant overvoltage and distorted waveforms. This phenomenon can be highly damaging to voltage transformers and other parallel-connected equipment and can entail catastrophic consequences. This paper aims to design and study a solid-state ferroresonance-suppressing circuit (SSFSC) to protect voltage transformers (VTs) together with other parallel-connected equipment in wind generation systems from the adverse effects of the ferroresonance phenomenon. The proposed structure consists of low-voltage circuits, including power IGBTs. The excellent performance of the proposed SSFSC in suppressing ferroresonance overvoltage in wind generation VTs has been authenticated by analyses conducted utilizing a wind generation system model. In order to validate the performance of the proposed SSFSC, detailed analytical studies and time-domain simulations have been carried out employing a MATLAB/Simulink environment. The results verify that the proposed SSFSC can effectively suppress ferroresonance phenomena in VTs and mitigate their accompanying overvoltages with a high operational speed.

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High Ohmic Reactor as a Shunt Limiter (HOR-SL) Method for Ferroresonance Elimination in the Distribution System

Cited by 8 publications

References 42 publications

Mitigation of Transients in Capacitor Coupled Substations Using Traditional RLC Filter Techniques

Mitigation of Transients in Capacitor Coupled Substations Using Traditional RLC Filter Techniques

Ferroresonance Modeling and Analysis in Underground Distribution Feeders

Innovative Solid-State Ferroresonance-Suppressing Circuit for Voltage Transformer Protection in Wind Generation Systems

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