This dissertation presents a grid-tied (PV) high-intensity-discharge (HID) street lighting system. During daytime, the battery is charged by a PV panel. A single-ended primary inductance converter (SEPIC) is studied for maximum power point tracking (MPPT). Accuracy and high efficiency battery charging can be achieved under a wide range of PV panel voltage variation. At night, the solar energy stored in the battery is released to drive the street lights by an electronic ballast circuit. High conversion efficiency and high MPPT accuracy can be achieved under different atmospheric conditions. A pulse-current charging scheme with an adaptive rest-period is also applied to avoid battery overcharging. An electronic ballast circuit is also designed to release the solar energy stored in battery for powering HID lamps. The proposed PV HID street lighting system has the advantages of high power density, simple circuit, and long lifetime. In this thesis, the PV array is modeled and its voltage-current characteristics and power-voltage characteristics are simulated and optimized. The main encumbrance for the reach of photovoltaic system is low efficiency and high capital cost. Here we intend to examine a schematic to draw out maximum obtainable solar power from a PV module for use in a street light application. The concept of MPPT is to be implemented which results in appreciable in create in the efficiency of the PV system. Different schemes of MPPT algorithms such as perturb and Observe, Incremental Conductance, Fractional Open Circuit Voltage, Fractional Short circuit Fuzzy Logic Control neural Network are to be studied and implemented The MPPT algorithm proposed will identify the suitable duty ratio in which system should be operated to obtain maximum power output.
