International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 09 | Sep 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 963 FAULT IDENTIFICATION AND REMOTE OPERATION OF RECEIVING SUBSTATION AND AUXILIARY SUBSTATION USING IOT Rajat Sangolkar 1, Prof. R.M. Bhombe 2 , Prof. A.S. Welankiwar 3 1-3 Department of Electrical Engineering, Guru Nanak Institute of Engineering and Technology, Nagpur, Maharashtra, India. ---------------------------------------------------------------------***--------------------------------------------------------------------- ABSTRACT: A substation is a part of an electrical generation, transmission, and distribution system. Early electrical substations required manual switching or adjustment of equipment, and manual collection of data for load, energy consumption, and abnormal events. As the complexity of distribution networks grew, it became economically necessary to automate supervision and control of substations from a centrally attended point, to allow overall coordination in case of emergencies and to reduce operating costs. Early efforts to remote control substations used dedicated communication wires, often run alongside power circuits. Power-line carrier, microwave radio, fibre optic cables as well as dedicated wired remote-control circuits have all been applied to Supervisory Control and Data Acquisition (SCADA) for substations. The development of the microprocessor made for an exponential increase in the number of points that could be economically controlled and monitored. Today, standardized communication protocols such as DNP3, IEC 61850 and Modbus, to list a few, are used to allow multiple intelligent electronic devices to communicate with each other and supervisory control centres. In this paper the various parameter for fault identification and remote operation are performed with the help of the IOT (Internet Of Things). A module of sensors and transducers monitors the parameters and also check for the healthiness of the system. The implementation of this type of schemes will increase the working efficiency of the system by continuously monitoring the healthiness of parameters of the system and also to identify the faulty part as well as the reason of the fault in the system directly within a short period of time. Keywords: - Substation Automation, Fault Identification, Parameter Monitoring, Parameter Controlling, Internet of Things. I. INTRODUCTION The aim of the electrical power system is to generate and supply the power electric to the user. To construct and to manage the energy to the utilization point, it must be had reliability and economy. Since the power system involved in the generation, transmission, distribution, it needs protection to avoid damage to electrical appliances and the Personal’s life. In electrical engineering, the power system is one of the exclusive fields which deal with shortest and the fastest time to trip and isolate the faulty area in the power system so that the fault does not affect the system directly. As a result, the system remains their stability and reliability. The essential elements of protection are sensors to identify the fault condition and a device to initiate tripping signal to the Circuit breaker. The protection system must fulfil the requirements of rapidly and automatically disconnect the faulty section of the power network, and minimize disconnection or interruption of power supply to the consumer. The ability of tripping for circuit breakers are reliability, selectivity, sensitivity, speed and stability. Considering the Metro Rail System, the Receiving substations (RSS) are the stations that receive the electrical power from the grid. The electrical power received here are in high voltage form i.e. 132kv or 220kv etc. In the receiving substation the voltage is stepped down into 33kv or into any other required value for the utility. Now this 33KV voltage is transmitted and then stepped down further into 415v and is used for the different utility. The process of stepping down the voltage from 33kv into 415v is done in the Auxiliary Substation (ASS).This RSS and ASS consists of the various equipment such as incoming lines, outgoing lines, transformers, post & string insulators, circuit- breakers, isolators, earthing switches, surge arresters, CTs, VTs, neutral grounding equipment, etc. To control and monitor all this equipment a SCADA system is used in the substations. The protection system employed in these substations is for- overcurrent, earth fault current, over voltage, under voltage, emergency tripping with the help of emergency push button, etc. Here, our main objective is to identify the type of fault and thus the exact location with the reason of tripping of the breaker can be identified. II. LITERATURE SURVEY Significant efforts have been employed for the protection and controlling of the substations from last two decades and many techniques have been proposed. Thus, a brief description with their advantages and disadvantages are described in the section below. a. According to Star Control INC., Florida. And according to the global forecast report, 2020; it is founded that the SCADA system comprises of