Abstract
In this paper, a four-leg matrix converter is proposed as the power conversion core for aircraft ground power unit (GPU) applications. This structure allows easy management of unbalanced and nonlinear loads with minimal disruption of the power supply operation. A hybrid repetitive-traditional control system is proposed to regulate the output voltage of the GPU. This solution reduces the steady-state tracking error, maintaining fast dynamic characteristics, and increases the stability of the converter compared to conventional approaches. Simulations and experimental results from a 7.5-KW converter prototype are presented to verify the operation of the proposed configuration and to prove the effectiveness of the solution.
Highlights
This paper investigates the use of the four-leg matrix converter as a ground power units (GPU) application supplying linear and non linear loads at 400Hz; it presents design and practical implementation of a plug-in type repetitive control system in ABC reference in order to improve the output voltage tracking performance, during transients and in steady state, and not to affect the system stability
The plug-in Repetitive control (RC) structure used in this work is shown in Figure 2, where R(z) is the reference input, Y(z) is the output signal, E(z) is the tracking error, D(z) is a disturbance signal, Gc(z) is the second order lead-lag controller, Gp(z) is the system plant, Grc(z) is the plug-in repetitive controller, kr is the repetitive controller gain, Z-M is a delay operator, M is the number of samples in one fundamental period of the reference voltage and M=N+L, Q(z) can be a gain lower than unity or a low pass filter to enhance the system stability and robustness
This paper proposes and discusses the use of plug-in type repetitive controller to regulate the output voltage of a fourLeg matrix converter for a ground power unit application
Summary
Abstract—In this paper a four-legs matrix converter is proposed as the power conversion core for Aircraft Ground Power Unit (GPU) applications. This structure allows easy management of unbalanced and non-linear loads with minimal disruption of the power supply operation. A hybrid repetitive-traditional control system is proposed to regulate the output voltage of the GPU. This solution reduces the steady state tracking error, maintaining fast dynamics characteristics, and increases the stability of the converter compared to conventional approaches. Simulations and experimental results from a 7.5KW converter prototype are presented to verify the operation of the proposed configuration and to prove the effectiveness of the solution
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