A Fault Tolerant Inverter with SCADA Communication Capability for Photovoltaic Applications

Document Type : Original Article


1 Electrical Engineering Department, Faculty of Technical and Engineering, Imam Khomeini International University, Qazvin, Iran.

2 Electrical Engineering Department, Faculty of Technology and Engineering, Imam Khomeini International University, Qazvin, Iran.


In most recent sensitive industrial application of inverters, reliability is a crucial issue to care. Due to development of SCADA system and variety of renewable energy in electrical grids that are mostly scattered in distance, it is necessary to have ability to communicate within industrial control systems and be allowable to be aware of a system condition every moment. Inverters are the core part of the grid-tied PV system. In traditional inverters, just local monitoring of electrical parameters or inverter’s condition was available but nowadays operation condition of inverters and more information like status, quantity of input, output, and electrical parameters like voltage, current, power or occurred faults, are available using developed industrial communication protocols. In instructed fault tolerated inverter of this article, a fault is manually simulated and applied in one of the switches. The result is that the damaged element was replaced with a redundant reserved switch and it was identified remotely by control center using IEC60870-5-101. It gives an extra feature to prepare an ideal decision to repair or maintain of that damaged switch. Validation of communication between inverter ad control server is lasted using Fink-WinPP101 software using IEC 60870-5-101 protocol. The proposed strategy is emulated on the 7-level inverter and the tolerance ability and faulty condition report with time tag is proved by using protocol tester software Fink-WinPP101. Experimental and simulation results prove accuracy of the proposed system.


  1. Sotoodeh, P., Miller, R. D., Design and implementation of an 11-level inverter with FACTS capability for distributed energy systems, IEEE J. Emerg. Sel. Top. Power Electron., 2014, 2:87-96.
  2. Can, E., Novel high multilevel inverters investigated on simulation,” Electr. Eng., 2017, 99: 633-638.
  3. Hagiwara, M., Hasegawa, I., Akagi, H., Start-up and low-speed operation of an electric motor driven by a modular multilevel cascade inverter, IEEE Trans. Ind. Appl., 2013, 49: 1556-1565.
  4. Xiao, B., Hang, L., Mei, J., Riley, C., Tolbert, L. M., Ozpineci, B., Modular Cascaded H-Bridge Multilevel PV Inverter with Distributed MPPT for Grid-Connected Applications, IEEE Trans. Ind. Appl., 2015, 51:1722-1731.
  5. Malinowski, M., Gopakumar, K., Rodriguez, J., Perez, M. A., A survey on cascaded multilevel inverters, IEEE Transactions on Industrial Electronics. 2010, 57: 2197-2206.
  6. EN 1991-1-5, Eurocode 1: Actions on structures -Part 1-5: General actions - Actions on structures exposed to fire, Eurocode 1, 2002.
  7. Kang, D. J., Robles, R. J., Compartmentalization of protocols in SCADA communication, Int. J. Adv. Sci. Technol., 2018, 8:27-36.
  8. Santos, J. P., RS232, in Tecnologias de Accionamento e Comando 2010/2011, 2010.
  9. Frenzel, L. E., RS-485, in Handbook of Serial Communications Interfaces, 2016.
  10. Clarke, G., Reynders, D., Wright, E., Practical Modern SCADA Protocols: DNP3, 60870.5 and Related Systems. 2004.
  11. Bailey, D., Wright, E., Practical SCADA for Industry, Elsevier Sci., 2003.
  12. Grilo, A. M., Chen, J., Diaz, Garrido, M., D., Casaca, A., An integrated WSAN and SCADA system for monitoring a critical infrastructure, IEEE Trans. Ind. Informatics, 2014, 10:1755-1764.
  13. Ashraf, M. N., Bin Khalid, S. A., Ahmed, M. S., Munir, A., Implementation of Intranet-SCADA using LabVIEW based data acquisition and management, in ICC2009 - International Conference of Computing in Engineering, Science and Information, 2009.
  14. Zhang, X., Wang, F., Ji, W., Qiao, S., Cao, Y., Fault tolerant control method for three-level photovoltaic inverter based on redundant voltage space vector, in Chinese Control Conference, CCC, 2017.
  15. Galketiya, T., Kahahena, J., Chandran, J., Kavalchuk, I., Novel communication system for SCADA tied smart inverter for Vietnam, in Proceedings of 25th Asia-Pacific Conference on Communications, APCC 2019, 2019.
  16. Deenadayalan, K. D., Jayanthy, S., Arunraja, A., Selvaraj, S., IoT based Remote Monitoring of mass Solar Panels, in Proceedings of the International Conference on Electronics and Sustainable Communication Systems, ICESC 2020, 2020.
  17. Medina, V., Gómez, I., Dorronzoro, E., Oviedo, D., Martín, S., Benjumea, J., Sánchez, G., IEC-60870-5 application layer for an open and Flexible Remote Unit, in IECON Proceedings (Industrial Electronics Conference), 2009.