A transformer-less central inverter system for utility scale photovoltaic power plants is set to maximize investor returns through optimized availability, efficiency, and yield. Control Techniques’ SPV is constructed using 145kWp, 176kWp, and multiple 176kWp parallel connected inverter modules to produce any desired power rating up to 1760kWp. The inverter modules are based on a mature design that is well-proven in thousands of demanding industrial applications, including the PV industry. Control Techniques is now introducing a unique control methodology that enables the modular inverters to switch between standby and active states to match the instantaneous power available from the solar array; this significantly enhances both efficiency and plant availability. Each inverter is constructed from one or more, easy to handle, compact modules that are  mass produced ensuring inherent quality, short delivery times, and minimized spares holding. The active/standby sequence of the inverter modules rotates daily ensuring that all modules are exercised equally, with the added benefit that individual modules accrue fewer operational hours per year than the alternative “bulk inverter” solution commonly found in the market. Consequently, the CT modular solution offers longer service life.

Control Techniques
www.controltechniques.com