Influence of commutation conditions on steady states in matrix converter

Abstract

Influence of commutation conditions on steady states in matrix converter The paper investigates a significant influence of transients on steady states in a matrix converter with the one-periodic control strategy. Proposed controller can be used as an interconnection device within a power system for a power flow control. However, the presence of inductances in external systems has the significant influence on steady state of a matrix converter operation. The special current injection method has been developed to ensure a proper operation of a matrix converter. Presented analysis of steady states is carried out in a frequency domain using the harmonic balance method. Obtained numerical results, which are confirmed by a time domain analysis, prove the effectiveness of the proposed method.

Description of matrix converter in frequency domain

“…Such approach is presented This method is not limited to the analysis of square MC (the same number of input and output phases), this assumption was introduced only to simplify the description in the paper. As the latest investigations showed, it is also possible to model commutation condition changes using the frequency analysis [2]. The above mentioned advantages make this description valuable in systems with the MC.…”

“…The switching element is in the conducting state, when the state function takes the value G p and it is in the non-conducting state, when this function equals G z . (2) According to this formula N switches are conducting all the time. Each of them is situated in a different row and column what assures lack of short circuit and provides the current path.…”