| 摘要 |
The invention relates to an MPPT method and circuit (31) for tracking the MPP, using a phase processing unit (PPU) that generates, with a potentially elevated resampling frequency, a first resampling signal cos(omegadith t) and a second resampling signal cos(omegadith t+ phi) dephased at a variable angle phi in order to obtain a signal (u) for acting on a commutated converter (12) of a photovoltaic system (30). The invention also includes a digital integrator (23) that generates an output signal (d) from a high-pass digital filter signal (21) in the MPPT circuit (31) and the second sampling signal cos(omegadith t+ phi) that pass through a multiplier (22) at the inlet of the digital integrator (23), and an adder (24) that adds the output signal (d) of the digital integrator (23) to the first resampling signal cos(omegadith t) in order to obtain the actuation signal (u). The unit (PPU) comprises an estimator (51) of the phase difference phiconv in the commutated converter (12), which, in turn, comprises an estimator of the incremental resistance RA and an estimator (52) of the phase difference phifd produced in the high-pass digital filter (21), that are added together to obtain the angle phi. |
