PWM converters are widely used to connect the distributed energy sources to the grid. LCL filters are widely used for these converters because its superiority over L and LC filters, however the resonance problem produced by these filters requires a more effort in the design process to damp it. Active damping techniques which use the sensed capacitor current are widely used in this regard to solve this problem; however this requires an increase in the number of sensors. Based on the optimum design for proportional plus resonant (P+R) controller, this paper introduces an active damping method based on the capacitor estimated current without increase in the number of sensors. This is achieved by using an additional observer loop as a feedback in the controller loop to estimate the capacitor current. The simulation results and the experimental verification for the proposed control algorithm are introduced in this work.
|Journal||INTELEC, International Telecommunications Energy Conference (Proceedings)|
|Publication status||Published - 2014|
|Event||2014 36th IEEE International Telecommunications Energy Conference, INTELEC 2014 - Vancouver, Canada|
Duration: Sept 28 2014 → Oct 2 2014
All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering