Irradiance and temperature transient sensitivity analysis for photovoltaic control

Voltage-offset resistive control for DC-DC converters in photovoltaic applications

“…In [4], preliminary MPPT methods utilizing VRC were introduced. Here, these methods are further developed and compared to traditional MPPT methods that also use a sampleand-hold control approach.…”

“…The examined converter topologies are the buck, boost without an input capacitor (referred to as the simple boost), and boost with an input capacitor. Steps on modeling these systems, linearizing around the equilibrium, and determining small-signal stability from eigenvalues are detailed in [4]. From this analysis, it was found that only control equation (4) shows small-signal stability for the simple boost and boost converter.…”

“…Steps on modeling these systems, linearizing around the equilibrium, and determining small-signal stability from eigenvalues are detailed in [4]. From this analysis, it was found that only control equation (4) shows small-signal stability for the simple boost and boost converter. Small-signal analysis ensures that the operating point converges to the equilibrium in a region around the equilibrium.…”

“…Research done in [4] introduces voltage-offset resistive control (VRC) that exhibits inherently low sensitivity to typical light changes compared to more traditional inner-loop control schemes such as constant current, voltage, or resistive control [5]. VRC is a combination of constant voltage and resistive control and, when parameters are properly chosen, closely follows the MPP throughout a transient.…”

Differential power processing architecture for increased energy production and reliability of photovoltaic systems

“…For example, a fractional open-circuit voltage approach may not be desirable since it would open the main circuit path. Simple, low power overhead techniques may be appropriate when power conversion is managed at the submodule level [23].…”