A Hysteresis Compensation Algorithm for the Generation of Nonlinear Voltage Sweep for IV-Characteristic Measurement of High-Capacitance Solar Modules With Xenon Flasher

article
2024
authors
Xu, C. and Kunze, I. and Friedrich, T. and Ramspeck, K. and Köntges, M.
journal
IEEE Journal of Photovoltaics

abstract

Short measurement time of tens of ms at industrial production leads to high influence of parasitic current on the current voltage (IV) curve characterization. This parasitic current deteriorates the measurement accuracy and should be mitigated. However, most methods, like, e.g., sectional measurement or DragonBackTM, are based on either unpractical long measurement time or sophisticated simulations. We present an algorithm for the generation of voltage sweep for low hysteresis measurement of IV characteristics in high capacitive solar modules. Using one linear voltage sweep-based IV characteristics as input, an optimized nonlinear voltage sweep is generated with our algorithm. While the linear voltage ramp during a 93 ms pulse leads to a hysteresis error at maximum power (ϵPmpp) of 1.46

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