System and method for leakage current suppression in a photovoltaic cascaded multilevel inverter
US9455645B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2014 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Jun 13, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The cascaded multilevel inverter is considered to be a promising topology alternative for low-cost and high-efficiency photovoltaic (PV) systems. However, the leakage current issue, resulting from the stray capacitances between the PV panels and the earth, remains a challenge in the photovoltaic cascaded multilevel inverter application. The present invention presents leakage current suppression solutions for the PV cascaded multilevel inverter by introducing properly arranged and designed passive filters. The embodiments of the invention do not include an active semiconductor device, and as such, the leakage current suppression techniques of the present invention retain the simple structure of the cascaded inverter and do not complicate the associated control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.