Annu Dagar

@msit.in

Assistant Professor, Electrical & Electronics Engineering
Maharaja Surajmal Institute of Technology

Annu Dagar


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https://researchid.co/annudagar

RESEARCH INTERESTS

Distributed Energy Resources, Islanding Detection, Microgrid Protection
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Scopus Publications

Scopus Publications

  • Power Quality Analysis of q-Axis Current Injection-Based Islanding Detection Techniques
    Annu Dagar, Pankaj Gupta, Vandana Niranjan
    IEEE Access, 2025
  • Energy Difference Based Fault Detection in Standalone Microgrid
    Annu Dagar, Pankaj Gupta, Vandana Niranjan
    3rd International Conference on Advances in Computing Communication and Materials Icaccm 2024, 2024
    The expansion of distributed generation (DG) within microgrid systems is significantly hindered by the considerable challenges linked with protection mechanisms. The formulation of an effective protection strategy for a microgrid presents a multifaceted challenge. The integration of DGs, alongside the dynamic characteristics of current, markedly alters the fault levels within the microgrid. To mitigate this problem, a straightforward and rapid protection methodology predicated on the Teager Kaiser Energy Operator (TKEO) is proposed in this manuscript for the safeguarding of standalone microgrids. This methodology necessitates the measurement of current at both extremities of the line to extract the energy from the current signal. The disparity in energy of the current signal is employed to identify the presence of faults. The proposed approach has been evaluated on a standalone microgrid across various fault types. Furthermore, it is devoid of computational complexity, thereby inherently expediting the fault detection process.
  • Electrical Power Plant Decision-Making by Utilizing IFS Weighted Averaging Operator
    Annu Dagar, Amit Mittal, Akhilesh Singh, Shailendra Giri, Sachit Rathee
    Proceedings of the 2nd International Conference on Intelligent and Innovative Technologies in Computing Electrical and Electronics Iciitcee 2024, 2024
    In the process of installation of Power plants (PPs) it is necessary to evaluate the environmental factors in order to make sure the sustainable and environmentally favorable energy production. This article explores the application of the Intuitionistic Fuzzy Set (IFS) theory in assessing the environmental impact of power plant design decisions. Due to the unpredictability and ambiguity of environmental evaluations, the IFS provides a comprehensive framework for modeling and monitoring ambiguous, imprecise, and insufficient data. Environmental assessments are unforeseen; therefore, this methodology is essential. Here, numerous factors are taken into account to make power plants decision such as: waste management, the use of renewable energy, emissions control, land and water utilization, climate change mitigation, stakeholder engagement, and legal compliance. As a result of the unpredictability inherent in environmental assessments, the methodology incorporates varying degrees of participation, non-participation, and aversion. This enables the approach to accommodate for uncertainty. Using the IFS-based approach, this objective is accomplished. The findings support the conclusion that the IFS approach is a successful method for handling ambiguous data. In case of finding the optimal location for power facilities, this methodology allows a more precise and detailed assessment of environmental concerns. By employing this approach, the result facilitates the decision-making (DM) process as well as supports the advancement of sustainable energy practices and mitigates the adverse environmental impacts associated with PP design.
  • Microgrid protection: A comprehensive review
    Annu Dagar, Pankaj Gupta, Vandana Niranjan
    Renewable and Sustainable Energy Reviews, 2021
    Amalgamation of distributed energy resources (DER) with power system is developing as an emerging power framework. It is ecumenically based on the paramount issues such as extensive use of technologies based on distributed energy resources, shortage of fossil fuel in future, liberalism of electrical service industries and custom vigilance on environmental impact of the conventional method of generating electrical power. These issues are transmuting the concept of conventional power generation globally and introduce incipient challenges in the generation and distribution system. The interconnection of distributed generators has initiated the concept of microgrid which is the assemblage of interconnected distributed generators, intermediate storage units and loads. The pragmatic application of microgrid faces numerous technical challenges. Scheming with a congruous protection scheme is one of the solemn challenges in a microgrid framework. The level of fault current in both the modes of operation, active distributed generation, two-way flow of power, increased value of impedance and quality of communication network are the profuse challenges in scheming an efficacious protection technique. The protection scheme must be reliable, selective, fast and susceptible in both the working modes. This paper presents the meticulous study of the architecture of AC microgrid, DC microgrid and hybrid microgrid along with the associated protection issues and solutions. It also provides the censorious assessment of available challenges in the protection of microgrid in both grid-tied & islanded mode and available protection strategies for both AC microgrid and DC microgrid. An all-inclusive review has been done in each section considering the latest developments along with the future progression in the field of microgrid protection.