Method for controlling a Vienna rectifier
A method for generating a current set point value for a charging device connected to an electrical network includes measuring at least one electrical voltage, calculating a filtered voltage according to the measured voltage and a value of electrical pulsation of the electrical network, estimating a frequency and the amplitude of the measured voltage according to the at least one measured voltage and the at least one filtered voltage, calculating a consolidated voltage according to the measured voltage and the filtered voltage, and generating a current set point value according to the consolidated voltage and the estimated amplitude.
1. A method of generating a current target value for a charging device connected to an electricity grid, comprising:
measuring at least one voltage;
calculating at least one filtered voltage based on said at least one measured voltage and a value of the electrical angular frequency of the electricity grid;
estimating a frequency and the amplitude of said at least one measured voltage based on said at least one measured voltage and said at least one filtered voltage;
calculating a consolidated voltage based on said at least one measured voltage and said at least one filtered voltage, said calculating the consolidated voltage providing a consolidated voltage close to said at least one low-voltage measured voltage and close to said at least one filtered voltage while moving further away from zero; and
generating a current target value based on said consolidated voltage and the estimated amplitude.
2. The method as claimed in claim 1 , wherein the method is implemented several successive times, and said value of the electrical angular frequency of the calculating at least one filtered voltage is determined based on a frequency estimated in a previous implementation.
3. The method as claimed in claim 1 , wherein the charging device is a three-phase charging device, and the measuring comprises measuring the phase voltages of the three-phase grid and calculating the measured voltages in a two-phase reference frame.
4. The method as claimed in claim 3 , further comprising:
extracting forward components of the filtered voltages,
wherein said estimating is based on said extracted forward components.
5. The method as claimed in claim 3 , wherein the calculating the consolidated voltage is based on values of amplitude thresholds.
6. A device to control a charging device connected to an electricity grid in order to implement the method as claimed in claim 1 , the device comprising:
means for measuring at least one voltage;
means for filtering said at least one measured voltage based on a value of an electrical angular frequency of the electricity grid;
means for estimating a frequency and the amplitude of said at least one measured voltage based on said at least one measured voltage and said at least one filtered voltage;
means for consolidating said at least one measured voltage based on said at least one measured voltage and said at least one filtered voltage, to provide a consolidated voltage close to said at least one low-voltage measured voltage and close to said at least one filtered voltage while moving further away from zero; and
means for generating a current target value based on said consolidated voltage and the estimated amplitude.
7. An assembly to recharge a battery of electrical accumulators and configured to be connected to an electricity grid, comprising:
a power factor correction circuit;
a DC-to-DC converter;
a battery of electrical accumulators; and
the control device as claimed in claim 6 .
8. The recharging assembly as claimed in claim 7 , wherein the power factor correction circuit comprises a Vienna rectifier.
9. The recharging assembly as claimed in claim 7 , wherein the assembly is connected to a three-phase or single-phase electricity grid.
10. A motor vehicle comprising:
the recharging assembly as claimed in claim 7 .