MOHAMMED AZAHARAHMED

@azahar_ahmed@srkrec.ac.in

Assistant professor, ELECTRICAL AND ELECTRONICS ENGINEERING
Sagi Ramakrishnam Raju Engineering College

MOHAMMED AZAHARAHMED


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https://researchid.co/azaharahmed

RESEARCH, TEACHING, or OTHER INTERESTS

Engineering, Renewable Energy, Sustainability and the Environment, Electrical and Electronic Engineering, Energy Engineering and Power Technology
22

Scopus Publications

Scopus Publications

  • Effect of primary and secondary parameters of friction stir welding on blank properties: a review
    Raja Sekhar Nukathoti, N Malleswararao Battina, Varaha Siva Prasad Vantala, Hari Krishna Chirala, Uddarraju Dhana Satya Prathap Varma, Mohammed Azaharahmed
    Engineering Research Express, 2026
    Friction stir welding (FSW) is an advanced solid-state joining method wherein the adjoining edges of two base metal plates are merged below their melting temperatures by the mechanical action of a rotating weld tool. Initially developed for welding soft materials like aluminum alloys, FSW has shown considerable promise for high-melting-point materials with appropriate modifications in process attributes. The quality and integrity of FSWed joints are highly sensitive to several process attributes, including tool rotational speed, weld speed, dwell time, tool tilt angle, tool geometry, tool material, and the number of welding passes. Extensive research has been conducted to estimate the influence of these parameters on joint strength, microstructural evolution, and defect formation. Despite its advantages over conventional fusion welding techniques, challenges persist in adapting FSW for hard and refractory materials, where issues such as tool wear, heat generation control, and defect suppression become critical. This study systematically reviews the evolution of key welding parameters and operational conditions employed in FSW processes. It highlights the specific difficulties encountered when welding high-melting-point materials, the limitations observed in previous investigations, and the current state of tool technology. Furthermore, the review identifies gaps in existing literature and proposes potential research directions aimed at enhancing the process’s reliability, efficiency, and applicability for a broader range of industrial materials. The study ultimately contributes valuable insights into optimizing FSW practices and expanding its operational envelope to meet modern manufacturing challenges.
  • Theoretical investigation of a vanadium dioxide-based terahertz metasurface with maximum overlap bandwidth for polarization conversion and absorption
    K. B. S. Sri Nagini, V. JayaPrakash, Narayana Rao Palepu, Majahar Hussain Mahammad, Thejovathi Murari, Mohammed Azahar Ahmed
    Journal of Materials Chemistry C, 2026
    A VO 2 -based terahertz metasurface enables thermally switchable dual functionality, acting as a wideband cross-polarization converter in the insulating state and a high-efficiency absorber in the metallic state.
  • Innovative energy control strategy for standalone SPV-DG-battery power systems employing fractional order PID controllers
    Mohammed Azahar Ahmed, Gudavalli Madhavi, Vemulapalli Harika, Srinivas Nakka, Mahammed Majahar Hussain, Pothula Jagadeesh
    International Journal of Powertrains, 2026
  • A novel fault-tolerant DC-DC Super lift luo converter
    Azaharahmed Mohammed, Gudavalli Madhavi, Vemulapalli Harika, G Veeranna, VNSR Murthy
    Engineering Research Express, 2025
    In recent years, the trend in converter technology has been towards higher efficiency. This trend often involves using advanced semiconductor materials and better control algorithms to mitigate potential failure modes. Despite these advancements, converter failures can still occur due to various factors including design flaws, manufacturing defects, inadequate cooling, improper operation, and external environmental conditions. This paper provides the novel approach to enhance fault tolerance in DC-DC converter systems by introducing parallel switches that activate in response to faults occurring in primary switches. It Examine the effectiveness of this fault-tolerant design in three popular converter configurations like Boost converter, Luo converter, and Super lift Luo converter with a focus on achieving the best output voltage characteristics. The Super Lift Luo Converter (SLLC) is a type of DC/DC converter that combines the advantages of a conventional boost converter and a Luo converter. It offers features such as high voltage gain, reduced switch stress, and low input current ripple. The output voltage quality is a critical aspect in power electronics applications, influencing the stability and reliability of the power supply. Theoretical analysis, simulation, experimental validation and comparative assessment for Luo and super lift Luo converter are done. The objective is to maintain consistent output voltage despite faults occurring in primary switches, thereby ensuring system reliability and stability for renewable and EV applications. As the electrical vehicles mostly deals with 48 V these converters are predominant in providing this value of supply.
  • Implementation of DC-DC Boost & Luo Converters for Photovoltaic Applications
    G Veeranna, Azaharahmed MD, Mohammad Rashid Hussain, Ramu Bhukya, Durga Rao R
    International Journal of Electrical and Electronics Research, 2025
    Renewables are eco-friendly, of them solar photovoltaic (PV) systems are growing in popularity as a means to directly transform solar radiation into electricity. Installing a PV array is simple, and the ongoing decline in the price of PV modules provides a support as renewable energy source. As the globe continues to deplete its fossil fuel reserves, discussions about alternative, renewable energy sources are heating up. Due to its quiet operation, low maintenance requirements, and lack of emissions, the photovoltaic (PV) power system is quickly rising to the top of the renewable energy industry. Since a PV array is an expensive system to build, it is necessary to exploit all of the available output power. In this proposed system a comparative analysis between boost and LUO converter has been implanted, for attaining high output gain performance devoted to supply both linear and non-linear loads. The proposed scheme tracks Maximum Power Point (MPPT) from the solar panel by perturb and observe(P&O) and Incremental conductance method (INC). A comparative analysis is performed to attain maximum output. Based on the comparison the converter with maximum output voltage is considered as LUO converter. Finally, a hardware prototype using DSPIC30F4011 microcontroller is considered to validate the performance of the two converters.
  • Advanced control strategy for a wind-hydrogen-battery standalone microgrid under distribution line fault conditions
    Pothula Jagadeesh, Asapu Siva, Patil Mounica, Md. Azahar Ahmed
    International Journal of Powertrains, 2025
    Standalone wind-based microgrids are gaining traction for remote and resilient power systems. To enhance power continuity and reliability, this work integrates a wind turbine generator (WTG) with battery energy storage, an aqua-electrolyser (AE), and a fuel cell (FC). A novel control strategy is proposed comprising: 1) a modified maximum power point tracking (MPPT) algorithm that ensures sustained wind energy harvesting post-fault; 2) an advanced inverter controller that actively limits fault current through inverter legs during distribution line faults. These coordinated controls improve system stability, protect components, and maintain power quality. The strategy is validated through MATLAB-Simulink simulations and real-time digital simulator (RTDS) results. Quantitatively, the proposed system reduces fault current magnitudes by up to 92%, maintains voltage THD below 4% during faults, and ensures seamless load support. The results confirm the effectiveness and novelty of the proposed control approach in enhancing fault tolerance and operational efficiency in wind-hydrogen-battery microgrids.
  • Performance evaluation of ant colony optimisation suggested energy management in using HOMER
    Pothula Jagadeesh, Asapu Siva, Patil Mounica, Putchakayala Yanna Reddy, Guthikonda Tejaswi, M. Mohamed Thameem Ansari, Md. Azahar Ahmed
    International Journal of Powertrains, 2025
    This paper addresses power management in Bhimavaram, India, an educational institution. The institution is known to be commercial load supplied from an 11 KV grid, the load deviations are primarily taken into account during the daytime simply due to the working hours of the institution. This optimisation is accompanied by a bidirectional power transfer from the grid to the institution and the institution to the grid. The optimal energy consumption is suggested for renewable power production for a solar plant with 125 kW generation for increasing the efficient utilisation of renewable energy along with reducing the electricity usage based on fossil fuel. Using an ant colony optimisation (ACO) algorithm, the above-mentioned optimal solution is suggested and that is further validated using HOMER Software. In HOMER Software the validation of the solution given by ant colony optimisation algorithm is completed by simulation.
  • Novel Energy Management Approach for SPV-DGBattery based Standalone Power Supply System with FOPID Controllers
    Cholleti Harish, P. Hemeshwar Chary, Mohammed Azaharahmed, Suresh Kakinatla, Pramod Mehra, K. Sarathy, Pasumarthy Nageswara Rao, Kandi Bhanu Prakash
    2025 IEEE 2nd International Conference on Green Industrial Electronics and Sustainable Technologies Giest 2025, 2025
    In this paper, a novel control methodology for a standalone system made up of “Solar Photovoltaic (SPV) unit, Diesel Generator (DG), and Battery Pack Unit (BPU)” components is presented. A bidirectional inverter is connected between the point of common coupling (PCC) and the dc bus, and a bidirectional dc-dc circuit connects in between the dc bus and the BPU. The main focus of this research is the weatherinduced and partial shading-induced fluctuations in SPV output power. To address this problem, Fractional Order Proportional Integral Derivative (FOPID) controllers based novel control strategy (for the inverter and the dc-dc converter) has been proposed, with the goal of optimizing power generation in partial shading and weather fluctuations. The balance of active power between the SPV, DG, and BPU is ensured by the management process of the dc-dc converter. In addition, the SPV maintains power balance under light load conditions by operating at a de-loaded state from its maximum power point (MPP). Even when there are unbalanced loads present, the inverter management makes sure that the PCC voltages and DG currents are balanced. Balanced DG currents contribute to a longer wear life of the shaft by reducing oscillations in generator torque and also it can help to reduce the consumption of diesel. Furthermore, the inverter control ensures that the inverter provides the reactive power required by the load, eliminating the need for the DG to produce reactive power and helping to reduce fuel usage. In order to support the suggested hypothesis, the study includes RTDS results in addition to thorough Matlab results for several scenarios.
  • Implementation of dual-axis solar tracker using smart battery protection system
    Azaharahmed Mohammed, N Malleswararao Battina, Hussain Majahar, Kusuma Gottapu
    Engineering Research Express, 2024
    Solar energy plays a vital role in power generation as a part of renewable energy source. Due to the intermittent nature of solar input and to increase the power output a dual-axis solar tracker is considered initially, and the power output is stored in the battery. The power extracted from the solar is enhanced with a dual tracker compared with other techniques. Moreover, the stored power in the battery is effected by cycles of charging and discharge. To aid and improve the performance of batteries a novel smart battery protection scheme is introduced. This scheme considers the battery parameters such as voltage, current, and temperature within the prescribed limit. Also, during fault conditions, this scheme provides safe operation of the battery which enhances the battery life.
  • INVESTIGATION OF CASCADED 2DOF-PID CONTROLLER WITH IMPROVED INVASIVE WEED (IIW) TECHNIQUE
    Journal of Theoretical and Applied Information Technology, 2024
  • OPTIMAL POWER FLOW PROBLEM SOLUTION USING DIVERSE SOFT COMPUTING TECHNIQUES
    Journal of Theoretical and Applied Information Technology, 2023
  • EXAMINATION OF VOLTAGE STABILITY BY CONSIDERING CPF ALGORITHM WITH STATCOM UNDER CONTINGENCY
    Journal of Theoretical and Applied Information Technology, 2023
  • Application of Centralized Cascade Controller Schemes for Interconnected Power System Frequency Control
    K. Raja, Md. Azaharahmed, Muzeeb Khan Patan, Ch. Durga Prasad
    Iranian Journal of Science and Technology Transactions of Electrical Engineering, 2023
  • Experimental and finite element investigations on formability of friction stir welded tailor welded blanks of AA6061 and AA2017
    N Malleswararao Battina, Hari Krishna Chirala, Varaha Siva Prasad Vanthala, Eswara Manikanta Javvadi, Raja Sekhar Nukathoti, Azaharahmed Mohammed
    Materials Today Proceedings, 2023
  • DIVERSIFIED SOFT COMPUTING TECHNIQUES SOLUTION FOR ECONOMIC LOAD DISPATCH PROBLEM
    Journal of Theoretical and Applied Information Technology, 2022
  • Water evaporation algorithm optimized cascade controller for frequency regulation of integrated microgrid
    K. Raja, Muzeeb Khan Patan, Md. Azahar Ahmed, P. Ganeshan
    Journal of Intelligent and Fuzzy Systems, 2022
  • PROTOTYPE FOR AUTOMATIC FIRE DETECTION AND EXTINGUISHING ROBO
    Harika Vemulapalli, Madhavi Gudavalli, Mohammed Azaharahmed
    Ecs Transactions, 2022
  • Influence of Primary Regulation on Frequency Control of an Isolated Microgrid Equipped with Crow Search Algorithm Tuned Classical Controllers
    Muzeeb Khan Patan, K. Raja, Mohammed Azaharahmed, Ch. Durga Prasad, P. Ganeshan
    Journal of Electrical Engineering and Technology, 2021
  • Invasive Weed Optimized Area Centralized 2 Degree of Freedom Combined PID Controller Scheme for Automatic Generation Control
    Mohammed Azaharahmed, K. Raja, Muzeeb Khan Patan, Ch. Durga Prasad, P. Ganeshan
    Journal of Electrical Engineering and Technology, 2021
  • Dynamic pso based 2 dof-pid controller tuning for load frequency control
    International Journal of Recent Technology and Engineering, 2019
  • Fopid based AGC with pso
    International Journal of Recent Technology and Engineering, 2019
  • Investigation of PV connected multilevel cascaded H-bridge inverter using disposition techniques
    Muzeeb Khan Patan, P Udaya Bhanu, M D. Azahar Ahmed
    International Journal of Engineering and Technology Uae, 2018