09-09-2010, 09:30 PM
ZIGBEE and GSM-SMS Based Conductor Temperature and Sag Monitoring
Presented By
ANEESH P
Roll No. 203
Electrical and electronics engg.
College of engineering, Trivandrum
contents
Introduction
Study on Relative Models
Preambles of Conductor Capacity Ratings
Dynamic Thermal Line Ratings (DTLR)
Traditional Methods for DTLR
The Structure of the Monitoring System
The Topology of System
Structure and Design of Monitoring Unit
The structure of temperature monitoring device
The structure of temperature monitoring unit
The structure of the communication unit
The Block diagram of Monitoring System
Flow charts
Example Calculations
Conclusions & Future Scope
References
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Introduction
Why this monitoring system is needed?
What is ZIGBEE GSM-SMS Method of monitoring system?
The principle of GSM-SMS and ZIGBEE system
Software hardware design
Study on Relative Models
Preambles of Conductor Capacity Ratings
Dynamic Thermal Line Ratings (DTLR)
Traditional Methods for DTLR
2.1 Preambles of Conductor Capacity Ratings
Key factors driving the changes in the way of utilities operate their transmission systems
Conductor thermal limits relates to conductor temperature and sag
Preset system accordance with environment, different boundary conditions in diifferent countries( india-75,usa-90,france-85)
2.2 Dynamic Thermal Line Ratings (DTLR)
Benefits of DTLR system
2.3,Traditional Methods for DTLR
Three traditional methods can be identified in industry practices for DTLR based on the measured parameters. These
are:
(1) weather-based models,
(2) Conductor temperature-based model, and
(3) The conductor tension-based model.
3. The Structure of the Monitoring System
The monitoring system of temperature of conductors and fittings and conductor sag based on GSM SMS and ZIGBEE is mainly composed of the provincial monitoring center, the municipal monitoring center, the communication unit, the temperature and pressure monitoring unit and the expert software
The Topology of System
4. Structure and Design of Monitoring Unit
The temperature of environment, conductor, and the crossing, Altitude values can be measured by the monitoring unit, which is composed of power module, MCU (Micro Control Unit), ZIGBEE communication module,
temperature sensors, Barometric pressure sensors and so on
LM35 is selected as the temperature sensor
MPXAZ6115A selected as pressures sensor
The structure of temperature monitoring device
The structure of temperature monitoring unit
The structure of the communication unit
The Block diagram of Monitoring System
Design of Software
Functions of monitoring unit
How its works?
Working based on sampling time base or cyclic mode alarm
5.1 Functions of Expert Software:
Functions of expert software
How it is functioning?
Use of ZIGBEE
Figure 8: Flow Chart for Monitoring Unit:
Figure 9: Flow Chart for Communication Unit
5.2 Laboratory Bench-Testing
Objectives of the bench-testing….
Where it is performed
Is it possible in real life…
5.3 Example Calculations
5.4 Pressure Altitude Calculator:
6. Conclusions & Future Scope
The main contribution of this paper is the design, construction, field testing and analysis of a GSM SMS and ZIGBEE based instrument for the real time direct measurement of overhead HV conductor temperature and sag. It is a direct technique It also presents a potential source for cost reduction and better accuracy in the conductor sag measurement . The real time direct measurement of overhead conductor temperature and sag is a clear advantage. The measured sensor temperature is not equal to the conductor temperature because the sensor is a heat sink in this complex thermal system. So the conductor temperature must be computed by using the measured temperatures of the sensor. For this purpose a
calibration of the sensor and conductor must be made in the laboratory.
References
[1]M.V. Vijaya Saradhi et al. / International Journal of Engineering Science and Technology Vol. 2(4), 2010, 372-381
[2] T. O. Seppa, “Accurate Ampacity Determination: Temperature-Sag Model for Operational Real Time Ratings,†IEEE Transactions on Power Delivery, Vol. 10, No. 3, July 1995.
[3] Zhao Chen,HE Bo, Wang Rui. A Design for ZigBee Wireless Communication Based on CC2420 RF transceiver. Micro-Computer Information, 2007.
[4] Zhang Xuezhe,Li Xiaoqing,Liu Changqing,and so on.Discussing on Measurement of Improving Conductor Transmission Capacity - Improving Conductor Allowable Temperature[J]. For electricity, 2005.
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Full report:
http://ijest.info/docs/IJEST10-02-04-06.pdf
