Designand Implementation of Networked Control SystemviaEthernetforSelf Excited Induction Generator Using OPC Server

Abstract

Induction generators are increasingly being used in nonconventional energy systems such as wind, micro/mini hydro, etc. The advantages of using an induction generator instead of a synchronous generator are well known. Some of them are reduced unit cost and size, ruggedness, brushless (in squirrel cage construction), absence of separate dc source, ease of maintenance, self-protection against severe overloads and short circuits, etc. In isolated systems, squirrel cage induction generators with capacitor excitation, known as self-excited induction generators (SEIGs), are very popular. Remotely control applications over a wide area had been commonly used in the industries today. One of the common applications requires remote control and monitoring is output voltage control of SEIGs supplied insensitive frequency loads. Drive system has various types of controller, in order to perform some actions such as control the speed to control the output voltage of SEIGs, switching On or Off loads supplied by the generator. This control system can be done by Programmable Logic Controller (PLC), and with the rise of the technology, Ethernet module will be used in order to achieve the remotecontrol system. Plus the PLC today can be controlled not only using its original software, but 3rd party software as well, such as LabVIEW). LabVIEW is a human machine interfaces design software that is user friendly. It can be easily communicate with different hardware using OLE for Process Control (OPC) server.