A new differential algorithm based on S-transform for the micro-grid protection

Langarizadeh, Abbas; Hasheminejad, Saeid

doi:10.1016/j.epsr.2021.107590

Cited by 16 publications

(8 citation statements)

References 14 publications

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“…considered as a phase-corrected WT, thereby offering more precise data on the local features of a signal in the time-frequency domain [118][119][120]. In [121], a protection scheme is suggested for radial/meshed MGs using differential protection and S-transform concepts. The differential currents of protected line terminals and differential fault energy ( E diff ) are calculated as:…”

Section: Travelling Wave-based Schemesmentioning

confidence: 99%

Comparative framework for AC-microgrid protection schemes: challenges, solutions, real applications, and future trends

Sheta

Abdulsalam

Sedhom

et al. 2023

Prot Control Mod Power Syst

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With the rapid development of electrical power systems in recent years, microgrids (MGs) have become increasingly prevalent. MGs improve network efficiency and reduce operating costs and emissions because of the integration of distributed renewable energy sources (RESs), energy storage, and source-load management systems. Despite these advances, the decentralized architecture of MGs impacts the functioning patterns of the entire system, including control strategy, energy management philosophy, and protection scheme. In this context, developing a convenient protection strategy for MGs is challenging because of various obstacles, such as the significant variance in short-circuit values under different operating modes, two-way power flow, asynchronous reclosing, protection blinding, sympathetic tripping, and loss of coordination. In light of these challenges, this paper reviews prior research on proposed protection schemes for AC-MGs to thoroughly evaluate network protection's potential issues. The paper also provides a comprehensive overview of the MG structure and the associated protection challenges, solutions, real applications, and future trends.

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Section: Travelling Wave-based Schemesmentioning

confidence: 99%

Comparative framework for AC-microgrid protection schemes: challenges, solutions, real applications, and future trends

Sheta

Abdulsalam

Sedhom

et al. 2023

Prot Control Mod Power Syst

View full text Add to dashboard Cite

show abstract

“…In [39] S-transform was used on the current signal at both ends to calculate differential energy for the detection of faults in microgrids. In addition, maximum amplitude curve was used to classify the faulty events.…”

Section: F S-transform (St) Based Schemementioning

confidence: 99%

A Kalman Filter-Based Protection Strategy for Microgrids

et al. 2022

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Recently, the concept of microgrids has emerged in the world due to the integration of distributed energy resources (DERs) at the distribution end. The design of a reliable protection strategy is one of the top-most challenges associated with microgrids. This is because of the transition of microgrids between grid-tied and autonomous modes of operation. This paper presents a state-of-the-art microgrid protection scheme based on the Kalman filter (KF). The proposed scheme uses the one-end current signal of a distribution line for the detection and classification of faults. Firstly, the KF is applied to each phase of a three-phase current signal individually to generate residuals and total harmonic distortion (THDs). Next, the variations in the residuals and THDs of each phase are compared with pre-specified threshold values to detect the faulty events in the microgrid. As each phase is processed through KF individually, therefore, the proposed scheme is inherently phase segregated. Afterward, the KF is applied to extract the third harmonic component from the three-phase current and voltage signals. Then, the KF-based reactive power (KFBRP) is obtained from the extracted third harmonic components. Finally, the directional properties of the threephase KFBRP are used to locate the faulty section in the microgrids. Extensive simulations in MATLAB/ Simulink software are performed for the grid-tied as well as the autonomous modes of operation under radial and meshed topologies. The results show that the proposed scheme is highly robust in all testing scenarios without any false tripping and blinding issues.

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“…Equation (12) shows that a superimposed quantity can be computed by the subtraction of normal signature from its faulted signature. This can be achieved by implementing the delta filters [30].…”

Section: Superimposed Quantities (Siq)mentioning

confidence: 99%

“…However, up-gradation of currently used protection devices is required for its implementation. In [12], an S-transform is applied on the current signal at both ends for the calculation of differential energy to detect the faults in microgrids. Then, the maximum amplitude curve is used for the classification of faulty phases.…”

Section: Introductionmentioning

confidence: 99%

Microgrid Protection Using Magneto-Resistive Sensors and Superimposed Reactive Energy

et al. 2022

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The concept of microgrids has emerged as an effective way to integrate distributed energy resources (DERs) into distribution networks. The presence of DERs in microgrids leads to challenges in the formulation of protection for microgrids. Protection problems arise in a microgrid due to varying fault current levels in different operating scenarios. In order to overcome the practical challenges arising from varying fault current levels leading to short-circuit faults in microgrids, this paper proposes a MagnetoResistive (MR) sensors-based protection scheme, with fault localization through SuperimposedReactiveEnergy (SRE). The process is initiated by employing highly sensitive non-intrusive magnetic sensors to detect the magnetic field at each end of the distribution line. The magnetic field is then used to calculate the total harmonic distortion and thus detect faults in microgrids. After detection of faults, the proposed scheme uses SRE to identify faulty zones in microgrids. Finally, SI components of the current are extracted for fault classification. Extensive simulations on the International Electro-technical Commission (IEC) microgrid are performed in MATLAB/Simulink to validate the efficacy of the proposed scheme. Simulation results show that the proposed scheme can effectively detect, classify and isolate different faults in microgrids, while operating under various modes with varying fault locations and resistances, with the efficiency of approximately 97–98%.

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A new differential algorithm based on S-transform for the micro-grid protection

Cited by 16 publications

References 14 publications

Comparative framework for AC-microgrid protection schemes: challenges, solutions, real applications, and future trends

Comparative framework for AC-microgrid protection schemes: challenges, solutions, real applications, and future trends

A Kalman Filter-Based Protection Strategy for Microgrids

Microgrid Protection Using Magneto-Resistive Sensors and Superimposed Reactive Energy

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