Origin of cross coupling effects in distributed dc–dc converters in photovoltaic applications
Download as DOC, PDF0 likes64 views
Long strings of photovoltaic modules are vulnerable to shading effects, reducing power output. To overcome this, distributed maximum power point tracking schemes connect individual DC-DC converters to each PV module to enable extracting maximum power from each module. This paper presents small-signal models for two distributed maximum power point tracking configurations - series and parallel - explaining observed operational peculiarities. The models are verified using a system with two maximum power point tracking buck-boost converters.
1 of 1
Download to read offline
More Related Content
What's hot (20)
Ad
Viewers also liked (16)
Ad
Origin of cross coupling effects in distributed dc–dc converters in photovoltaic applications
- 1. ORIGIN OF CROSS-COUPLING EFFECTS IN DISTRIBUTED DC–DC CONVERTERS IN PHOTOVOLTAIC APPLICATIONS ABSTRACT: Long strings of photovoltaic (PV) modules are found to be vulnerable to shading effects, causing significant reduction in the system power output. To overcome this, distributed maximum power pointtracking (DMPPT) schemes have been proposed, in which individual dc-dc converters are connected to each PV module to enable module-wise maximum power extraction. There are two main concepts to implement DMMPT systems: series and parallel configuration, describing the connection of the output terminals of the converters. Both systems are studied intensively, with innovative solutions to encountered operational challenges and novel control methods. However, a comprehensive dynamic model for neither system has been presented so far. This paper fills the gap by presenting small-signal models for both configurations, explaining the observed operational peculiarities. The analytical claims are verified with a practical system comprising two maximum power point-tracking buck-boost converters.