Improved traditional directional protection by using the stationary wavelet transform

Leal, Mônica Maria; Campos, João Tiago Loureiro Sousa

doi:10.1016/j.ijepes.2018.08.005

Cited by 20 publications

(10 citation statements)

References 32 publications

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“…Further, an improved approach using PSO is described in Reference 111 to strengthen the WT approach with better operational efficiency. A protection algorithm is proposed in Reference 112 based on stationary WT to detect the fault occurring time much faster with a less computational burden. A comparative study of WT‐based SVM and independent component analysis‐based SVM is presented in Reference 113.…”

Section: Other Miscellaneous Schemesmentioning

confidence: 99%

Review of distributed generator integratedACmicrogrid protection: issues, strategies, and future trends

Sarangi

Sahu

Rout

2021

Intl J of Energy Research

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In the recent power system scenario, the concept of microgrid is evolving rapidly. The architecture should be robust enough to cater the complexity of integration of distributed generation sources, demand-side management, and storage. The fast growth of embedded generation with other advanced power electronic interfaces and components along with energy storage devices change the operating pattern of the integrated power system scenario. In this context, protection is the vital aspect for qualitative uninterrupted power and making the system resilient to adverse, and faulty conditions. Many associated issues, particularly related to AC microgrid systems like the large difference in the short-circuit level between integrated and isolated mode of operation, bidirectional power flow, unsynchronized reclosing, the blindness of protection, lack of natural zero-crossing current, and false tripping are needed to be focused. In light of the above factors, it motivates us to survey the previous research works on the existing protection strategies to redesign and present the critical analysis of the predicted protection issues of microgrid protection with upcoming advanced technology and methodology. This article presents a critical review of the issues and protection schemes for the DG integrated AC microgrid extensively. Here, the merits, and demerits of each protection scheme, and visible possibilities for any advancement in protection strategies to enhance the reliability, selectivity, and security of AC microgrid is emphasized keeping in mind the different connections and configurations. In addition, this work also focuses on integrating the intelligent approaches/devices that help to elevate the current protection schemes to be smarter and efficient.

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Section: Other Miscellaneous Schemesmentioning

confidence: 99%

Review of distributed generator integratedACmicrogrid protection: issues, strategies, and future trends

Sarangi

Sahu

Rout

2021

Intl J of Energy Research

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“…To overcome this issue, later, a waveletbased multiresolution approach is described in Shekar et al 79 Here, the transient current is utilized to develop the algorithm by using the coefficient of Mother Biorthogonal 1.5 wavelets. Further, to enhance the performance, a robust method inclusive of all conventional methods along with wavelet transform is described in Leal et al 80 Here, real-time stationary wavelet transform is implemented in sequence components for the detection of three-phase fault with the help of negative sequence components even in severe voltage sag conditions. The major issues related to the wavelet transformbased protection schemes are the (a) dependency of system performance upon the noise in the power signals and (b) increased computational burden.…”

Section: Wavelet Transform-based Protection Strategymentioning

confidence: 99%

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

2020

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Summary The integration of distributed energy resources (DERs) with conventional systems emerges as an intelligent solution for providing uninterrupted and secure power even at times of high load demand. Better load management with a mature fault handling mechanism makes AC a viable option which has an efficiency of 78.24%. In contrast with less power loss and slightly better efficiency of 84.6%, DC microgrid is a reliable option in a low power environment. In order to accommodate all operating conditions and load types, a hybrid system can be designed with a theoretical efficiency of more than 90%. Bidirectional power flows, low inertia, the transition between different modes of operations are the challenges for the protection of alternating current (AC) and direct current (DC) microgrid systems. Power balance fluctuation, absence of zero‐crossing currents, selection of suitable grounding, and coordination between different rating devices restrict the hybrid system to achieve the said efficiency constantly. This paper reviews in detail of existing protection along with grid‐connected algorithms for both modes of operation. Finally, the limitation, major hurdles, and future course of action for a reliable, efficient, and secure hybrid grid system are figured out.

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“…Several studies have contributed to this field of research. Traditional fault diagnostic methods can be divided into impedance-based methods [4], [5], voltage sag based methods [6], traveling wave based methods [7], [8], and machine learning based methods [9]. For example, [4] proposes an impedance-based method to locate faults in distribution networks using an impedance matrix.…”

Section: Introductionmentioning

confidence: 99%

Fault Location and Classification for Distribution Systems Based on Deep Graph Learning Methods

Chen

et al. 2023

Journal of Modern Power Systems and Clean Energy

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Accurate and timely fault diagnosis is of great significance for the safe operation and power supply reliability of distribution systems. However, traditional intelligent methods limit the use of the physical structures and data information of power networks. To this end, this study proposes a fault diagnostic model for distribution systems based on deep graph learning. This model considers the physical structure of the power network as a significant constraint during model training, which endows the model with stronger information perception to resist abnormal data input and unknown application conditions. In addition, a special spatiotemporal convolutional block is utilized to enhance the waveform feature extraction ability. This enables the proposed fault diagnostic model to be more effective in dealing with both fault waveform changes and the spatial effects of faults. In addition, a multi-task learning framework is constructed for fault location and fault type analysis, which improves the performance and generalization ability of the model. The IEEE 33-bus and IEEE 37-bus test systems are modeled to verify the effectiveness of the proposed fault diagnostic model. Finally, different fault conditions, topological changes, and interference factors are considered to evaluate the anti-interference and generalization performance of the proposed model. Experimental results demonstrate that the proposed model outperforms other state-of-the-art methods.

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Improved traditional directional protection by using the stationary wavelet transform

Cited by 20 publications

References 32 publications

Review of distributed generator integratedACmicrogrid protection: issues, strategies, and future trends

Review of distributed generator integratedACmicrogrid protection: issues, strategies, and future trends

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

Fault Location and Classification for Distribution Systems Based on Deep Graph Learning Methods

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