Fabrication of Stand Alone Solar Inverter

The stand-alone power inverter is equipped with various management systems which guarantee the stable operation of the power supply system. Battery, generator, power and load management complement each other to provide a comprehensive system management. All the necessary variables are measured or calculated by Sunny Island. This ensures that no switching activity or set point alteration will be left to chance. In order to enable the parallel operation of the AC coupled voltage sources without involving any communication, the so-called “droop mode” is used. This method uses active and reactive power statics as a basis for coordinating the performance of the various coupled converters . To achieve optimum power flow, the grid parameters voltage and frequency are specifically influenced. Each converter operates by using a cascade controller as its voltage source. In this way, the consumption and output of active power of each individual parallel converter is independently controlled as a function of the stand-alone power grid frequency. If the frequency increases due to a sudden reduction in load, all converters will reduce their power input, and thus the system will remain balanced.