CONTROL METHOD FOR ELECTRICAL CONVERTER WITH LC FILTER

摘要

An electrical converter is interconnected via a filter with an electrical load or an electrical power source. A method for controlling the converter comprises the steps of: receiving a reference flux (ψ*i) for the electrical converter; determining output signals (y) comprising currents and/or voltages measured in the filter; determining an estimated flux (ψi) from the output signals (y); determining a corrective flux (ψi,damp) from the output signals (y) based on a mathematical model of the filter and a quadratic cost function; determining control input signals (u) for the electrical converter based on a sum of the estimated flux (ψi) and the corrective flux (ψi,damp); controlling the converter with the control input signals (u); and algorithmic filtering of at least one of the output signals (y) by applying a signal filter to the at least one output signal, which is designed for amplifying the at least one output signal at a resonance frequency of the filter, whereby the corrective flux (ψi,damp) is determined from the filtered output signals.

主权项

1. A method for controlling an electrical converter interconnected via a filter with an electrical load or electrical power source, the method comprising the steps of:
determining output signals comprising currents and/or voltages measured in the filter;
determining an estimated flux from the output signals;determining a corrective flux from the output signals based on a mathematical model of the filter and a quadratic cost function;determining control input signals for the electrical converter based on a sum of the estimated flux and the corrective flux;controlling the converter with the control input signals;algorithmic filtering of at least one of the output signals by applying a signal filter to the at least one output signal, which is designed for amplifying the at least one output signal at a resonance frequency of the filter, whereby the corrective flux is determined from the filtered output signals.