Differential Power Based Selective Phase Tripping for Fault-resilient Microgrid

Anudeep, Bhatraj; Nayak, Paresh Kumar

doi:10.35833/mpce.2020.000194

Cited by 8 publications

(7 citation statements)

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“…In this work, differential power-based selective phase tripping is used. Calculating differential power requires knowledge about the voltage and current at the line-end [17]. By identifying wrong phases, an MG may be made threshold-free using a power coefficient index (PCI).…”

Section: Literature Review Of Different Microgrid Fault Detection Tec...mentioning

confidence: 99%

Empirical Evaluation of Microgrid Fault Identification Models from a Statistical Perspective

Jagdish G. Chaudhari, Bhupendra Kumar

2024

jes

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Microgrid fault identification models are developed via integration of extensive data collection, pre-processing of collected data, current & voltage segmentation, feature representation, identification of variant feature sets, their classification & post-processing operations. Existing models that perform microgrid fault identification are either highly complex, or cannot be applied for heterogeneous fault types. Moreover, these models also showcase large variance in terms of their qualitative & quantitative performance levels. Due to these issues, it is difficult for researchers to identify optimum models for their performance-specific deployment use cases. To overcome these issues, a detailed review of different microgrid fault detection & mitigation models in needed, which can evaluate their performance in terms of qualitative & quantitative parameters. Thus, this text initially discusses characteristics of some of the recently proposed microgrid fault detection models in terms of their functional nuances, application specific advantages, deployment specific limitations, and context-specific future research scopes. After referring this discussion, it was observed that linear models that incorporate pattern recognition are highly useful for fault pre-emption and mitigation purposes. This text also compares these models in terms of their accuracy of detection, delay needed for fault identification, computational complexity, deployment cost, and scalability metrics.

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Section: Literature Review Of Different Microgrid Fault Detection Tec...mentioning

confidence: 99%

Empirical Evaluation of Microgrid Fault Identification Models from a Statistical Perspective

Jagdish G. Chaudhari, Bhupendra Kumar

2024

jes

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“…The ITOC characteristic equation specified by the International Electrotechnical Commission (IEC) is shown in (9) [32].…”

Section: A Characteristic Equation and Parameter Selection Principle ...mentioning

confidence: 99%

“…With a high proportion of DGs connected to the power grid, the traditional single-terminal radial distribution network becomes a complex multi-terminal power system. ITOC protection based on steady-state fault currents can hardly meet the requirements of selectivity and rapidity [8], [9]. Many methods to improve the coordination of ITOC protections have been proposed in the existing literature.…”

Section: Introductionmentioning

confidence: 99%

Inverse-time Backup Protection Based on Unified Characteristic Equation for Distribution Networks with High Proportion of Distributed Generations

Chang,

Song,

Chang

et al. 2024

Journal of Modern Power Systems and Clean Energy

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The setting work of backup protection using steadystate current is tedious, and mismatches occasionally occur due to the increased proportion of distributed generations (DGs) connected to the power grid. Thus, there is a practical need to study a backup protection technology that does not require stepby-step setting and can be adaptively coordinated. This paper proposes an action sequence adaptive to fault positions that uses only positive sequence fault component (PSFC) voltage. Considering the influence of DGs, the unified time dial setting can be obtained by selecting specific points. The protection performance is improved by using the adjacent upstream and downstream protections to meet the coordination time interval in the case of metallic faults at the near-and far-ends of the line. Finally, the expression and implementation scheme for inversetime backup protection (ITBP) based on the unified characteristic equation is given. Simulation results show that this scheme can adapt to DG penetration scenarios and can realize the adaptive coordination of multi-level relays.

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“…Before the short-circuit occurs, the capacitance current i C* and short-circuit current i f* are almost zero, so (19) can be simplified to (20):…”

Section: Calculation Of Transient Admittance Gradientmentioning

confidence: 99%

“…The hidden trouble reduces the protection speed, and may lead to protection failure. In order to take into account, the speed and sensitivity of the protection, a protection based on power difference is proposed in [19]. Similarly, based on power variation, the fuse is used as the protection device of low‐voltage DC MG [20], which has a simple structure and low price.…”

Section: Introductionmentioning

confidence: 99%

Protection strategy for DC multi‐microgrids based on gradient of branch admittance difference

Zhang

et al. 2022

IET Power Electronics

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Fast and reliable short fault detection is one of the key technologies in the development of DC multi‐microgrids (MMG). In order to improve the speed and reliability of DC relay protection, especially to solve the problem of protection failure in high impedance short‐circuit, a fault criterion based on the gradient of the branch admittance differential is proposed. The branch admittance is the quotient of current and voltage. It makes effective use of the characteristics of the fault current and voltage, so it has higher sensitivity. By detecting the current and voltage at the two sides of the branch, the admittance differential gradient of the branch is calculated and used as the fault criterion. In case of normal operation or fault outside the protection zone, the differential admittance gradient of the branch is zero, and in case of fault inside the protection zone, the admittance differential gradient of the branch is greater than zero regardless of high impedance or low impedance short‐circuit. Meanwhile, the admittance difference gradient is the largest at the beginning of the fault. Therefore, the detection time is reduced. Finally, the experimental results confirm the effectiveness of the proposed strategy.

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Differential Power Based Selective Phase Tripping for Fault-resilient Microgrid

Cited by 8 publications

References 0 publications

Empirical Evaluation of Microgrid Fault Identification Models from a Statistical Perspective

Empirical Evaluation of Microgrid Fault Identification Models from a Statistical Perspective

Inverse-time Backup Protection Based on Unified Characteristic Equation for Distribution Networks with High Proportion of Distributed Generations

Protection strategy for DC multi‐microgrids based on gradient of branch admittance difference

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