Open circuit fault diagnosis for a five-level neutral point clamped inverter in a grid-connected photovoltaic system with hybrid energy storage system




photovoltaic, fault diagnosis, five-level neutral point clamped inverter, line-to-line pole voltages


Introduction. Recently, the number of high and medium voltage applications has increased dramatically. The connection between these different applications requires series-parallel combinations of power semiconductors. Multilevel converter topologies provide major advantages to these applications. In this paper, a grid-connected photovoltaic system with a hybrid energy storage system using a five-level neutral point clamped inverter is studied. Although the multilevel inverter has many advantages over the two-level inverter, it has a high probability of experiencing an open circuit fault. In this context, the five-level inverter has 24 controllable switches, one of which may experience an open circuit fault at any time. Therefore, it plays an important part in the reliability and robustness of the whole system. The novelty of this paper presents an approach to accurately detect the open circuit fault in all insulated gate bipolar transistors of a five-level neutral point clamped inverter in a photovoltaic power generation application with a hybrid energy storage system. Purpose. Before using fault-tolerant control to ensure service continuity, fault diagnosis techniques must first be used, which are the crucial phase of reliability. Methods. A detection method based on the maximum and minimum error values is proposed. These errors are calculated using the expected and measured line-to-line pole voltages. Results. The open circuit fault detection method is implemented using MATLAB/Simulink. Simulation results showed the accuracy of detecting the open circuit fault in all insulated gate bipolar transistors in a short time. Moreover, this method is adaptable to several applications and is also robust to transient regimes imposed by solar irradiation and load variations.

Author Biographies

A. Abdellah, University of Tiaret

PhD Student, Department of Electrical Engineering, L2GEGI Laboratory

M. Larbi, University of Tiaret

Full Professor, Department of Electrical Engineering, L2GEGI Laboratory

D. Toumi, University of Tiaret

Senior Lecturer, Department of Electrical Engineering, L2GEGI Laboratory


Cabrane Z., Kim J., Yoo K., Ouassaid M. HESS-based photovoltaic/batteries/supercapacitors: Energy management strategy and DC bus voltage stabilization. Solar Energy, 2021, vol. 216, pp. 551-563. doi:

Teleke S., Baran M.E., Bhattacharya S., Huang A.Q. Rule-Based Control of Battery Energy Storage for Dispatching Intermittent Renewable Sources. IEEE Transactions on Sustainable Energy, 2010, vol. 1, no. 3, pp. 117-124. doi:

Jing W., Hung Lai C., Wong S.H.W., Wong M.L.D. Battery‐supercapacitor hybrid energy storage system in standalone DC microgrids: a review. IET Renewable Power Generation, 2017, vol. 11, no. 4, pp. 461-469. doi:

Javed K., Ashfaq H., Singh R., Hussain S.M.S., Ustun T.S. Design and Performance Analysis of a Stand-alone PV System with Hybrid Energy Storage for Rural India. Electronics, 2019, vol. 8, no. 9, art. no. 952. doi:

Khaligh A., Li Z. Battery, Ultracapacitor, Fuel Cell, and Hybrid Energy Storage Systems for Electric, Hybrid Electric, Fuel Cell, and Plug-In Hybrid Electric Vehicles: State of the Art. IEEE Transactions on Vehicular Technology, 2010, vol. 59, no. 6, pp. 2806-2814. doi:

Roy P.K.S., Karayaka H.B., Yan Y., Alqudah Y. Investigations into best cost battery-supercapacitor hybrid energy storage system for a utility scale PV array. Journal of Energy Storage, 2019, vol. 22, pp. 50-59. doi:

Kong L., Yu J., Cai G. Modeling, control and simulation of a photovoltaic /hydrogen/ supercapacitor hybrid power generation system for grid-connected applications. International Journal of Hydrogen Energy, 2019, vol. 44, no. 46, pp. 25129-25144. doi:

Choi U.-M., Lee J.-S., Blaabjerg F., Lee K.-B. Open-Circuit Fault Diagnosis and Fault-Tolerant Control for a Grid-Connected NPC Inverter. IEEE Transactions on Power Electronics, 2016, vol. 31, no. 10, pp. 7234-7247.

Himour K., Ghedamsi K., Berkouk E.M. Supervision and control of grid connected PV-Storage systems with the five level diode clamped inverter. Energy Conversion and Management, 2014, vol. 77, pp. 98-107. doi:

Yang G., Fu C., Yi H., Chai C., Huang B., Hao S., Chen Z. Direct power control of three-level NPC grid-connected system combined with fault-tolerant technology. Microelectronics Reliability, 2018, vol. 88-90, pp. 1057-1062. doi:

Jlassi I., Estima J.O., Khojet El Khil S., Mrabet Bellaaj N., Marques Cardoso A.J. Multiple Open-Circuit Faults Diagnosis in Back-to-Back Converters of PMSG Drives for Wind Turbine Systems. IEEE Transactions on Power Electronics, 2015, vol. 30, no. 5, pp. 2689-2702. doi:

Zhou D., Yang S., Tang Y. A Voltage-Based Open-Circuit Fault Detection and Isolation Approach for Modular Multilevel Converters With Model-Predictive Control. IEEE Transactions on Power Electronics, 2018, vol. 33, no. 11, pp. 9866-9874. doi:

Rehman H., Tariq M., Sarwar A., Alhosaini W., Hossain M.A., Batiyah S.M. Single-Phase Fault Tolerant Multilevel Inverter Topologies – Comprehensive Review and Novel Comparative Factors. Energies, 2022, vol. 15, no. 24, art. no. 9319. doi:

Li H., Guo Y., Xia J., Li Z., Zhang X. Open‐circuit fault diagnosis for a fault‐tolerant three‐level neutral‐point‐clamped STATCOM. IET Power Electronics, 2019, vol. 12, no. 4, pp. 810-816. doi:

Abadi M.B., Mendes A.M.S., Cruz S.M.A. Three-level NPC inverter fault diagnosis by the Average Current Park’s Vector approach. 2012 XXth International Conference on Electrical Machines, 2012, pp. 1893-1898. doi:

Mendes A.M.S., Abadi M.B., Cruz S.M.A. Fault diagnostic algorithm for three‐level neutral point clamped AC motor drives, based on the average current Park’s vector. IET Power Electronics, 2014, vol. 7, no. 5, pp. 1127-1137. doi:

Chao K.-H., Ke C.-H. Fault Diagnosis and Tolerant Control of Three-Level Neutral-Point Clamped Inverters in Motor Drives. Energies, 2020, vol. 13, no. 23, art. no. 6302. doi:

Abid M., Laribi S., Larbi M., Allaoui T. Diagnosis and localization of fault for a neutral point clamped inverter in wind energy conversion system using artificial neural network technique. Electrical Engineering & Electromechanics, 2022, no. 5, pp. 55-59. doi:

Abadi M.B., Mendes A.M.S., Cruz S.M.A. Method to diagnose open‐circuit faults in active power switches and clamp‐diodes of three‐level neutral‐point clamped inverters. IET Electric Power Applications, 2016, vol. 10, no. 7, pp. 623-632. doi:

Caseiro L.M.A., Mendes A.M.S. Real-Time IGBT Open-Circuit Fault Diagnosis in Three-Level Neutral-Point-Clamped Voltage-Source Rectifiers Based on Instant Voltage Error. IEEE Transactions on Industrial Electronics, 2015, vol. 62, no. 3, pp. 1669-1678. doi:

Yu Y., Li X., Wei L. Fault Tolerant Control of Five-Level Inverter Based on Redundancy Space Vector Optimization and Topology Reconfigruation. IEEE Access, 2020, vol. 8, pp. 194342-194350. doi:

Abdellah A., Toumi D., Larbi M., Moreau S. Zero-Compensator Filter for Power Sharing Between Battery/Supercapacitor in a Grid-Connected Photovoltaic System. Advances in Electrical and Electronic Engineering, 2022, vol. 20, no. 2, pp. 154-169. doi:

Mostafa H.H., Ibrahim A.M., Anis W.R. A performance analysis of a hybrid golden section search methodology and a nature-inspired algorithm for MPPT in a solar PV system. Archives of Electrical Engineering, 2019, vol. 68, no. 3, pp. 611-627. doi:

Jing W., Lai C.H., Wong W.S.H., Wong M.L.D. Dynamic power allocation of battery-supercapacitor hybrid energy storage for standalone PV microgrid applications. Sustainable Energy Technologies and Assessments, 2017, vol. 22, pp. 55-64. doi:

Manandhar U., Tummuru N.R., Kollimalla S.K., Ukil A., Beng G.H., Chaudhari K. Validation of Faster Joint Control Strategy for Battery- and Supercapacitor-Based Energy Storage System. IEEE Transactions on Industrial Electronics, 2018, vol. 65, no. 4, pp. 3286-3295. doi:

Ali A.I.M., Mohamed H.R.A. Improved P&O MPPT algorithm with efficient open-circuit voltage estimation for two-stage grid-integrated PV system under realistic solar radiation. International Journal of Electrical Power & Energy Systems, 2022, vol. 137, art. no. 107805. doi:




How to Cite

Abdellah, A., Larbi, M., & Toumi, D. (2023). Open circuit fault diagnosis for a five-level neutral point clamped inverter in a grid-connected photovoltaic system with hybrid energy storage system. Electrical Engineering & Electromechanics, (6), 33–40.



Industrial Electronics