3. REVIEW ON FAULT DETECTION IN SUBSTATION BY USING GSM MODEM

Any distribution or transmission network is prone to faults, and intermittency in power availability creates loss for the supplier as well as user. Majorly, a supply line can be effected by conditions of overvoltage and over current, also under-voltage condition. During the occurrence of any fault, the incident goes unreported for long duration. Manual reporting can lead to l ong outage time. To overcome this problem, a GSM based signalling system is developed that will detect the changes in voltage-current parameter, and using a microcontroller based circuit, the faults can be classified based on comparison values obtained fro m rated parameters of the distribution substation. To overcome these, we are proposing a GSM based transmission line fault detection System. Whenever the preset threshold is crossed, the microcontroller instantly initiates a message to be sent to the area lineman and the Control Station stating the exact pole to pole location. This helps us to realize an almost real time system. The real intention of detecting fault in real time and protecting the transformer at the earliest is realized.