Hybrid optoelectronic sensor for current and temperature monitoring in overhead transmission lines
- 1. HYBRID OPTOELECTRONIC SENSOR FOR CURRENT AND TEMPERATURE MONITORING IN OVERHEAD TRANSMISSION LINES Abstract: Transmission line capacity is the maximum amount of energy or current capable of flowing through the line. The sag is an important TL parameter, since it is directly related to the current: the higher the current, the higher the conductor temperature. This leads to thermal expansion and consequently, the conductor-to-ground distance decreases. Nevertheless, the conductor temperature does not depend only on the current. It is strongly dependent on environmental features such as wind velocity and direction, air temperature, pollution, rain and snow conditions, and on cable construction. The idea behind this project is that the temperature of the conductor depends on current and weather conditions, but the sag only depends on the conductor temperature, regardless of weather conditions Existing system: At present there is no existing system to measure the conductor sag in over head transmission lines. It is observed only with naked eyes. Hence we go for the proposed system. Proposed system: In the proposed system, the conductor sag is measured using the current and temperature values of the transmission line and the environment. These parameters are measured since the conductor sag is influenced by current and temperature in the conductor. This obtained value is compared with the predefined values and the conductor sag is estimated. The abnormality in the temperature and current is intimated using voltage controlled LED set up. In the receiver section, LDR is used to observe the light source and the abnormality status is noted down in the PC and a database is created for future reference.
- 2. Block Diagram: Transmission Line Section: Power Supply LCD PIC Temperature Sensor 16F877A Current Sensor Relay Driver Controller Micro Receiver Section: Power Supply LCD PIC LDR 16F877A Micro Controller MAX 232 LED
- 3. Hardware requirements: PIC16F877A Microcontroller with Power Supply LCD LDR Relay driver LED MAX 232 Temperature Sensor Current Sensor Software requirements Embedded c MPLab Compiler or CCS Compiler VB .net Advantages Easy measurement Less power consuming