A GSM based and speech enabled wireless annunciator window facia for substation automation

The aim of this paper is to design and implement the wireless communication between annunciator window located in control room and numerical relay located at far end in bay control room at switch yard of substation with the help of GSM device and to make available fault data in speech format for easy understanding to operator working in sub-station. This is for the purpose of making fault data available for immediate analysis via SMS with user friendly working of system. Fault data remains in stored memory format and can be accessed as per requirement. With the help of GSM device, fault data is transmitted from auxiliary output contacts of numerical relay to annunciator window located in control room as well as to mobile phone of corresponding sub-station Engineer. Such advanced & new technologies are developed which are useful for making power system as a smart power system. GSM aided speech enabled annunciator window facia provides more flexibility than wire based means of communication and continues to play a significant role in the modernization.