| Abstract |
This paper deals with the study of an inverter system, used in train supply application. This system has
been modelized and a control law has been determined so that the imposed specifications are respected [1]. However, when using an AC rectified inverter supply, it has been noticed residual low-frequency
ripple on the output voltage of the machine. This ripple appears especially when the output inverter frequency is close to that of the AC supply. This paper shows that this phenomenon can be restricted by the synchronization of the frequencies of
the inverter and of the voltage supply. The supply voltage characteristics will be estimated using
Kalman filter. This strategy was tested on the real system and has been found very efficient. Some
numerical results will illustrate the efficiency of this strategy.
Keywords: Inverter, output low-frequency ripple, Kalman filter, inverter frequency synchronization.
The considered system is used in the train air-conditioning supply. It consists in converting a onephase
high-voltage supply into a three-phase lower-level voltage supply. This system is composed of:
• The system is supplied with an AC supply which modulus and frequency are known
approximately and depend on the electrical supply network dealt with (frequency of about 50Hz
for the French network, and about 2 16Hz
3
for the German one), |
