Comparison of Matrix Converter Stabilization Techniques Based on the Damping Resistor and Digital Filter Approaches for Bidirectional Power Flow Control
- Institution of Engineering and Technology
- Publication Type:
- Journal Article
- IET Power Electronics, 2019
- Issue Date:
The matrix converter is becoming a mature technology with its speciﬁc advantages and limitations, and can be effectively used as an interface link in the future smart grids. In this context, the stability of the converter under different power ﬂow conditions is highly important and needs more clariﬁcation. The input inductor-capacitor ﬁlter can signiﬁcantly impact the stability of the converter when the output is tightly regulated, especially in bidirectional power ﬂow control applications where a low-impedance source is connected to the converter output. This paper investigates the matrix converter stability for bidirectional power ﬂow control, considering the input ﬁlter and other parameters of the system. A detailed analysis of two commonly used active and passive stabilization techniques known as digital ﬁlter and damping resistor approaches is presented, and a third method based on a combination of these two methods is suggested in this paper. The converter stability region for the proposed technique is determined by using the small-signal model of the converter. The converter performance for the methods is compared in terms of the efﬁciency, stability, transients and quality of the input and output currents. Numerical simulations and experimental tests are conducted on a prototype direct matrix converter to validate the proposed method.
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