Grid interconnection of photovoltaic (PV) power generation system has the advantage of more effective utilization of generated power. However, the technical requirements from both the utility power system grid side and the pv system side need to be satisfied to ensure the safety of the pv installer and the reliability of the utility grid. Clarifying the technical requirements for grid interconnection and solving the problems are therefore very important issues for widespread application of pv systems. Grid interconnection of pv systems is accomplished through the inverter, which convert dc power generated from pv modules to ac power used for ordinary power supply for electrical equipments. Inverter system is therefore very important for grid connected pv systems. Inverter technology is very important to have reliable and safety grid interconnection operation of PV system. It is also required to generate high quality power to ac utility system with reasonable cost. To meet with these requirements, up to date technologies of power electronics are applied for PV inverters. By means of high frequency switching of semiconductor devices with PWM (pulse width modulation) technologies, high efficiency conversion with high power factor and low harmonic distortion power can be generated. Reduction of inverter system cost is to be accomplished. The greatest influence on system cost is the amount of pv modules installed. Other factors include maximum power demand, location, type and quality of equipment, extent of automatic controls and metering, provision of suitable accommodation for equipment and the amount of wiring needed. The cost of grid connected pv systems varies considerably.
Introduction:- Applications of solar energy
- Market of PV power plant
- B. I. S. Specifications
- Basic system description
- Power plant configuration and specifications of main plant equipment
- Suppliers of interactive grid solar power plants