International Journal of Advanced Engineering Application

ANN-Optimised Space Vector PWM for a Single-Phase 5 kW Grid-Connected Solar PV Inverter: Harmonic Reduction, Efficiency Enhancement, and Thermal Performance Under Himalayan Irradiance Conditions

Author(s):Vikram Thakur, Anita Rawat

Affiliation: Department of Electrical Engineering, Himachal Pradesh Technical University, Hamirpur, Himachal Pradesh, India Department of Electronics and Communication Engineering, Graphic Era Hill University, Dehradun, Uttarakhand, India

Page No: 120-126

Volume issue & Publishing Year: Volume 3, Issue 5, May 2026

Journal: International Journal of Advanced Engineering Application (IJAEA)

ISSN NO: 3048-6807

DOI: https://doi.org/10.5281/zenodo.20286613

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Abstract:
Grid-connected solar photovoltaic (PV) inverters constitute the critical power conversion interface between PV arrays and the utility distribution grid, and their performance in terms of output power quality, conversion efficiency, and thermal reliability directly determines the techno-economic viability of distributed solar generation installations. The Himalayan states of Himachal Pradesh and Uttarakhand, with annual global horizontal irradiance (GHI) of 4.8–6.2 kWh/m²/day in the mid-altitude (800–2000 m) zone and significant irradiance variability due to cloud shadow effects, mountain terrain masking, and seasonal snow cover, present a demanding operating environment for inverter control systems that must maintain output voltage quality and grid synchronisation across rapidly varying DC input conditions. Conventional sinusoidal PWM (SPWM) and space vector PWM (SVPWM) strategies apply fixed switching patterns that are suboptimal under variable irradiance, producing elevated total harmonic distortion (THD) and reduced conversion efficiency at partial load — the predominant operating condition under Himalayan weather patterns. This study proposes an Artificial Neural Network (ANN)-optimised SVPWM control strategy for a 5 kW single-phase H-bridge inverter in which a three-layer feedforward ANN trained on simulated PV array operating points dynamically adjusts the space vector dwell times and switching sequence to minimise output voltage THD across the full modulation index range (0.5–1.0). The proposed ANN-SVPWM achieves THD of 3.2% at M=0.9 (versus 18.4% for conventional SPWM and 12.1% for standard SVPWM), peak conversion efficiency of 97.4% at 3 kW output (versus 95.1% for conventional SVPWM), DC link voltage ripple of 4.8 V peak-to-peak (versus 18.4 V conventional), and dynamic voltage recovery time of 8 ms under 50% step load change (versus 82 ms conventional PI control). Heat sink temperature rise at full 5 kW load is reduced from 48°C to 31°C, extending IGBT junction life by an estimated factor of 2.8. Hardware-in-the-loop (HIL) validation using dSPACE DS1104 confirms simulation results within 2.1% deviation. These findings demonstrate the practical viability of ANN-based adaptive PWM control for improving solar inverter performance in mountain irradiance environments representative of north Indian hill-state distributed generation deployments.

Keywords: solar PV inverter, space vector PWM, ANN control, THD reduction, grid-connected inverter, harmonic distortion, Himachal Pradesh, Uttarakhand, efficiency, HIL validation, dSPACE, IGBT, modulation index

Reference:

• [1] Akagi, H., Watanabe, E. H., & Aredes, M. (2017). Instantaneous Power Theory and Applications to Power Conditioning (2nd ed.). IEEE Press / Wiley.
• [2] Bose, B. K. (2009). Power electronics and motor drives — recent progress and perspective. IEEE Transactions on Industrial Electronics, 56(2), 581–588.
• [3] CEA. (2013). Technical Standards for Connectivity of the Distributed Generation Resources. Central Electricity Authority, Ministry of Power, Government of India.
• [4] Dahidah, M. S. A., & Agelidis, V. G. (2008). Selective harmonic elimination PWM control for cascaded multilevel voltage source converters. IEEE Transactions on Power Electronics, 23(4), 1620–1630.
• [5] Datta, M., & Senjyu, T. (2013). Fuzzy control of distributed PV inverters/energy storage systems/electric vehicles for frequency regulation in a large power system. IEEE Transactions on Smart Grid, 4(1), 479–488.
• [6] Holmes, D. G., & Lipo, T. A. (2003). Pulse Width Modulation for Power Converters: Principles and Practice. IEEE Press / Wiley.
• [7] IRENA. (2023). Renewable Power Generation Costs in 2022. International Renewable Energy Agency, Abu Dhabi.
• [8] Kjaer, S. B., Pedersen, J. K., & Blaabjerg, F. (2005). A review of single-phase grid-connected inverters for photovoltaic modules. IEEE Transactions on Industry Applications, 41(5), 1292–1306.
• [9] Kumar, P., & Thakur, A. (2019). Solar energy potential assessment of Himachal Pradesh, India. Renewable and Sustainable Energy Reviews, 104, 85–94.
• [10] Mohan, N., Undeland, T. M., & Robbins, W. P. (2003). Power Electronics: Converters, Applications, and Design (3rd ed.). Wiley.
• [11] Munoz-Garcia, A., Lipo, T. A., & Novotny, D. W. (1998). A new induction motor V/f control method capable of high-performance regulation at low speeds. IEEE Transactions on Industry Applications, 34(4), 813–821.
• [12] MNRE. (2023). Annual Report 2022-23. Ministry of New and Renewable Energy, Government of India.
• [13] Rawat, A., & Thakur, V. (2022). Irradiance variability analysis for solar PV systems in hilly terrain of Uttarakhand. Journal of Renewable and Sustainable Energy, 14(3), 033501.
• [14] Rodriguez, J., et al. (2007). Multilevel inverters: A survey of topologies, controls, and applications. IEEE Transactions on Industrial Electronics, 49(4), 724–738.
• [15] Singh, B., Chandra, A., & Al-Haddad, K. (2015). Power Quality: Problems and Mitigation Techniques. Wiley.
• [16] Trzynadlowski, A. M. (2015). Introduction to Modern Power Electronics (3rd ed.). Wiley.
• [17] Venkataramanan, G., Divan, D. M., & Jahns, T. M. (1993). Discrete pulse modulation strategies for high-frequency inverter systems. IEEE Transactions on Power Electronics, 8(3), 279–287.
• [18] Wang, F., et al. (2021). ANN-based adaptive PWM control for single-phase inverters with improved harmonic performance. IEEE Access, 9, 112384–112396.
• [19] Xue, Y., et al. (2011). Topologies of single-phase inverters for small distributed power generators. IEEE Transactions on Power Electronics, 19(5), 1305–1314.
• [20] Zhang, L., et al. (2020). A review of space vector modulation for three-phase inverters. IEEE Journal of Emerging and Selected Topics in Power Electronics, 8(4), 4099–4114.