Document Type : Original Article

Authors

• AmirHesam Olfati ¹
• Mohammad Sarvi ²

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.

Abstract

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.

Keywords

• Inverter
• SCADA
• Control center
• Fault tolerant