Abstract
This paper proposes a new simple maximum power point tracking (MPPT) control scheme for a PV system without using conventional “mountain climbing” optimum operating point searching technique. Although no information of voltage and current is needed on PV array side, the generated output power on ac system side can be automatically maximized by utilizing limit cycle phenomena occurring on equilibrium/non-equilibrium boundary of system power flow. After explaining the operating principle of proposed scheme, it is applied to a common “boost chopper/3-phase inverter” interface power converter system. The experimental results show an availability of the new control scheme.
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