Advanced control technique for solar PV plant to provide ancillary services

An advanced Solar Photovoltaic plant controllers designed to improve system performance, reduce the need for ancillary services, and provide ancillary services instead of or in competition with conventional resources. This paper presents control model of three phase grid connected photovoltaic generation system with new approach for reactive power regulation. In order to maximize the power output, components of Photovoltaic System should be optimized. For the optimization maximum power point tracking (MPPT) is a promising technique that grid connected inverters use to get the maximum possible power from solar PV array. The model of the SPWM inverter and a control strategy using park transformation are proposed the system operates as an reactive power compensator, generated by the other load connected to system. Renewable power generation systems utilizing power electronics converters rely on accurate grid phase angle determination in order to successfully close grid voltage vector oriented control loop usual for this kind of application. A three phase grid connected voltage source inverter synchronizes to the grid by a robust phase lock loop (PLL).