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For the purpose of control and monitoring of a Photovoltaic (PV) system its current-voltage (I-V) characteristic curve is traced. Usually such a test involves the interruption of the normal operation of the PV systems. In this paper a method for tracing the I-V curve from on-site measurements is proposed. During the measurement of the characteristic curve the normal operation of the PV system is not...
Multiple peaks in the Power vs. Voltage (P-V) characteristics of Photovoltaic (PV) arrays appear due to partial shading. Conventional Maximum Power Point Tracking (MPPT) algorithms fail to track the Global Peak (GP) among the Local Peaks (LP). Special MPPT techniques are applied for tracking the GP under partial shading conditions. Various schemes reported in the literature perform blind scanning...
Various peaks in the Power vs. Voltage (P-V) characteristic curve of Photovoltaic (PV) arrays appear due to the effects of partial shading. Conventional Maximum Power Point Trackers (MPPTs) may be unable to track the Global Peak (GP) among the Local Peaks (LP). For tracking the GP under partial shading conditions it is important to develop special MPPTs. In commercially available MPPTs, blind scanning...
The capacitor charging method can be used in Photovoltaic (PV) systems for two typical applications: a very simple and cheap way (1) to trace the I–V curve of a PV generator of whatever size and (2) to track the Maximum Power Point (MPP), especially when the partial shading occurs. The problem is the correct sizing of the capacitor in order to achieve accurate, uniform and smooth results. In the first...
The Power vs. Voltage (P-V) characteristic of a photovoltaic (PV) array is characterized by the presence of multiple maxima under partial shading conditions. Out of these only one is the global maximum. Conventional Maximum Power Point Tracking (MPPT) techniques may fail to track the global maximum which results inconsiderable power loss. Therefore, special MPPT techniques are adopted for MPP tracking...
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