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Transcript
Remote monitoring of transformer or generator health over internet Abstract: The main aim of the project is to acquire real-time data of distribution transformers remotely over internet falling under the category of Internet of Things-IOT. For this real-time scenario we take one temperature sensor, one potential transformer and one current transformer for monitoring T, V, I data of the transformer and then send them to a remote location anywhere in the world. These three analog values are taken in multiplexing mode connected to a programmable microcontroller of 8051 family through an ADC 0808. Then the values of all the sensors are sent sequentially as per the frequency of multiplexing of the ADC by microcontroller . They are then sent directly through an Wi-Fi module under TCP IP protocol to a dedicated IP that displays the data in real time chart form in any web connected PC / Laptop for display in 3 different charts. The real time data is also seen at the sending end upon a LCD display interfaced to the microcontroller. Description: Transformers are a vital part of the transmission and distribution system. Monitoring transformers for problems before they occur can prevent faults that are costly to repair and result in a loss of service. Current systems can provide information about the state of a transformer, but are either offline or very expensive to implement. Transformers being the essential part of power transmission system are expensive, as is the cost of power interruptions. Because of the cost of scheduled and unscheduled maintenance, especially at remote sites, the utility industry has begun investing in instrumentation and monitoring of transformer. On-line transformer diagnostics using conventional technologies like carrier power line communication, Radio frequency based A2,GROUND FLOOR,OMEGA APARTMENT,NEAR KVB BANK,YELLAREDDY GUDA ROAD,OPP RS BROTHERS,AMEERPET,HYDERABAD,TELANGANA-500073 www.esystems.co.in control system, and Supervisory control and data acquiring systems, Distributed control systems and Internet based communications are having their own limitations. GSM is an open, digital cellular technology used for transmitting mobile voice and data services. This project objective is to develop low cost solution for monitoring health condition of remotely located distribution transformers using GSM technology to present premature failure of distribution transformers and improving reliability of services to the customers. An Embedded based hardware design is developed to acquire data from electrical sensing system. It consists of a sensing system, signal conditioning electronic circuits, advanced embedded hardware for middle level computing, a powerful computer network for further transmission of data to various places. A powerful GSM networking is designed to send data from a network to other network for proper corrective action at the earliest. Any change in parameters of transmission is sensed to protect the entire transmission and distribution. The performance of prototype model developed is tested at laboratory for monitoring various parameters like transformer over load, voltage fluctuations, over temperature, oil quality and level etc. The LPC2148 are based on a 16/32 bit ARM7TDMI-S™ CPU with real-time emulation and embedded trace support, together with 128/512 kilobytes of embedded high speed flash memory. A 128-bit wide memory interface and unique accelerator architecture enable 32-bit code execution at maximum clock rate. For critical code size applications, the alternative 16-bit Thumb Mode reduces code by more than 30% with minimal p e r f o r m a n c e p e n a l t y . With their compact 64 pin package, low power consumption, various 32-bit timers, 4- channel 10-bit ADC, USB PORT,PWM channels and 46 GPIO lines with up to 9 external interrupt pins these microcontrollers are particularly suitable for industrial control, medical systems, access control and point-of-sale. With a wide range of serial communications interfaces, they are also very well suited for communication gateways, protocol converters and embedded soft modems as well as many other general-purpose applications. A2,GROUND FLOOR,OMEGA APARTMENT,NEAR KVB BANK,YELLAREDDY GUDA ROAD,OPP RS BROTHERS,AMEERPET,HYDERABAD,TELANGANA-500073 www.esystems.co.in This project uses regulated 5V, 750mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac output of secondary of 230/18V step down transformer. Block diagram: A2,GROUND FLOOR,OMEGA APARTMENT,NEAR KVB BANK,YELLAREDDY GUDA ROAD,OPP RS BROTHERS,AMEERPET,HYDERABAD,TELANGANA-500073 www.esystems.co.in Power supply: Hardware Requirements Microcontroller LCD display A to D converter Temperature sensors Relay Resistors Capacitors Diodes Transformer Voltage Regulator Transistors PT CT WiFi module as required Software Requirements Keil compiler Language: Embedded C or Assembly. A2,GROUND FLOOR,OMEGA APARTMENT,NEAR KVB BANK,YELLAREDDY GUDA ROAD,OPP RS BROTHERS,AMEERPET,HYDERABAD,TELANGANA-500073 www.esystems.co.in