Abstract Due to the particularity of its own structure, matrix converter is vulnerable to the abnormal power supply of input side. In this paper, the equivalent mathematical model of the system is established under grid failures according to short circuit grounding faults. A new switch control strategy is proposed. This strategy ensures the security of matrix converter through the control signals of 9 groups of bidirectional switches being given respectively in different time under grid faults. The working conditions of matrix converter under normal and abnormal states of grid are simulated in Matlab/Simulink. Then DSP and FPGA algorithms are designed respectively in C language and VHDL to perform the proposed control strategy. Finally, a highly integrated experimental platform of matrix converter has been developed to verify the proposed switching control strategy. It is shown that the control strategy can not only make the speed control system have good static and dynamic performances, but also simulate the various conditions of matrix converter correctly under normal or abnormal grid operations. That is to say the matrix converter-induction motor direct torque control system has the capability of crossing grid faults.
Guo Yougui,Huang Songtao,Wang Zhen等. Crossing Ability of Grid Faults for Matrix Converter Direct Torque Control System[J]. Transactions of China Electrotechnical Society, 2017, 32(16): 203-211.
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2017, Vol. 32 
