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This paper proposes a unique standalone hybrid power generation system, applying advanced power control techniques, fed by four power sources: wind power, solar power, storage battery, and diesel engine generator, and which is not connected to a commercial power system. Considerable effort was put into the development of active-reactive power and dump power controls. The result of laboratory experiments revealed that amplitudes and phases of ac output voltage were well regulated in the proposed hybrid system. Different power sources can be interconnected anywhere on the same power line, leading to flexible system expansion. It is anticipated that this hybrid power generation system, into which natural energy is incorporated, will contribute to global environmental protection on isolated islands and in rural locations without any dependence on commercial power systems. This paper presents an intelligent method for maximizing power output from a solar system is desirable to increase efficiency by use of on MPPT algorithm, buck-boost operation and multifunctional smart solar tracking system. The proposed MPPT-algorithm is used to track MPPs because it performs precise control under rapidly changing atmospheric conditions.

A photovoltaic (PV) based dynamic voltage restorer (DVR) is proposed to handle deep voltage sags, swells and outages on a low voltage residential distribution system. The PV based DVR can recover sags up to 10%, swells up to 190% of its nominal value. Otherwise, it will operate as an Uninterruptable Power Supply (UPS) when the utility grid fails to supply. It is also designed to reduce the usage of utility grid, which is generated from nuclear and thermal power stations. PV based DVR system is comprised of PV system with low and high power DC–DC boost converter, PWM voltage source inverter, series injection transformer and semiconductor switches. Simulation results proved the capability of the proposed DVR in mitigating the voltage sag, swell and outage in a low voltage distribution system.

Keywords

Automatic Tracking, Buck-Boost Chopper, Grid connected Photovoltaic system, incremental conductance (Inccond), Maximum power point tracking (MPPT), Photovoltaic (PV) System, Renewable energy, solar tracker, Dump load, dump power control, low cost, stand-

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