An experimental device for fault simulation of switching tubes in two-level inverters

Abstract

The present invention provides an experimental device for simulating faults of switching tubes of two-level inverters, including an inverter main circuit, a signal sampling circuit, an MCU control module, a communication transmission module, a PC host computer, and the PC host computer simulates fault types as required , and send the corresponding fault command to the MCU control module; after receiving the command, the MCU control module controls the inverter main circuit to perform corresponding fault simulation, and samples through the signal sampling circuit, and then sends the sampled data to the PC host computer through the communication transmission module, The PC upper computer performs real-time data processing. The beneficial effect of the present invention: it can realize the real-time online acquisition of inverter current and voltage data by the upper computer, which is convenient for subsequent data processing, fault classification, verification algorithm, etc., so as to facilitate related study and research; The relevant algorithm verification provides a physical verification platform, the technical solution is novel and feasible, and has engineering use value.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis of electric appliances, in particular to an experimental device for simulating faults of switching tubes of two-level inverters. Background technique [0002] Inverters are now widely used in various occasions such as daily life, aerospace, industrial production and energy supply. Distributed power generation can effectively solve the current energy utilization dilemma and the environmental pollution problems existing in traditional thermal power generation because it uses various scattered renewable and clean energy sources to generate electricity, and it improves the economy and reliability of the existing power system. It has been widely used all over the world. Renewable energy generation systems all involve high-power, high-efficiency, and high-quality energy conversion, and power electronics technology is one of the key technologies. [0003] Distributed power can output both direc...

AI Technical Summary

Problems solved by technology

The traditional manual fault finding method is very difficult to quickly and accurately diagnose faults, which not only takes a long time, but also affects life, production and power supply reliability

[0004] After a short-circuit fault occurs in the switching tube of the inverter, the internal sintering of the switching tube will eventually turn into an open-circuit fault. The real-time current data of the inverter cannot be obtained, only offline data processing and fault diagnosis can be performed, and there is a problem that the diagnosis is not timely

Images