Extended Operation Range of Photovoltaic Inverters by Current Waveform Shaping

Terahertz substance imaging by waveform shaping.

Terahertz pulse shaping technique is used to adaptively design terahertz waveforms of enhanced spectral correlation to particular materials among a given set of materials. In a proof-of-principle experiment performed with a two-dimensional image target consisted of meta-materials of distinctive resonance frequencies, the as-designed waveforms are used to demonstrate terahertz substance imaging....

Evaluation of Single Phase Transformerless Photovoltaic Inverters

Transormerless inverters are attractive solution for the grid connected photovoltaic (PV) systems. Unfortunately, it has issues on galvanic isolation between PV systems to the grid. When the galvanic isolation disappears from the PV inverter, leakage currents will flow in a resonant circuit formed by the ground capacitance, the converter, the ac filter and the grid. In order to avoid the leakag...

Uptime Improvements for Photovoltaic Power Inverters

For optimum performance, the expansion of solar energy installations requires a robust and reliable infrastructure of panels, inverters and system control. Because of the geographically distributed and sometimes remote deployment of these solar power installations, reliability and performance is paramount to wider-scale adoption of these systems. Thus, it is very important to monitor the perfor...

Operation and Design of Multilevel Inverters

A Unified Current Loop Tuning Approach for Grid-Connected Photovoltaic Inverters

Weiyi Zhang 1,*, Daniel Remon 1, Antoni M. Cantarellas 1,2 and Pedro Rodriguez 1,2 1 Department of Electrical Engineering, Technical University of Catalonia, Rambla Sant Nebridi 22, Terrassa, Barcelona 08222, Spain; [email protected] (D.R.); [email protected] (A.M.C.); [email protected] (P.R.) 2 Abengoa Research, Abengoa, Energia Solar 1, Palmas Altas, Seville 41014,...