Prepaid digital energy with keypad interface
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Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
University of Management and Technology
Abstract
The modern world is the challenging place. Ideas are polishing the minds of the Engineers, Scientists and Analysts who are involved in the development of industry as well as providing feasible products to the users. In the 21st century everyone is talking about modernization and development but without electricity it seems to be unaccomplished. The users are growing exponentially and load on power providing divisions (e.g. WAPDA) is increasing, so organizations as well as customers must be facilitated by giving them an innovative solution; i-e, concept of Prepaid digital energy meter. As older technology based energy meter gets older they may become less accurate due to its mechanical design (based on Ferrari Wheel Principle) and are the main source of dissipating the power so it makes good prospective sense to move to this new technology. Collecting data from power meters is a laborious task. Conventionally the meter is read by human being and written onto a notepad. The data then has to be typed into a computer before it can be processed.
By keeping all these things in the mind, the idea of Prepaid digital energy meter. has been flourished comprising of three modules: energy calculation using metering IC (SA9903B),controlling module,diplay unit The system developed automates the whole process that is, measuring the power from digital electric meter, send the consumed units (Postpaid electric meter) and card number (Prepaid electric meter) to area sub-station and the process of bill generation. It also eliminates human error in reading meters, improves meter reading accuracy, an accurate usage based bill resulting in better customer satisfaction, protection against electricity theft and meter tampering. This metering system is feasible for residential, commercial and industrial applications because of the versatility and low-cost afforded by system design.. The system design also changes the economics of manufacturing energy meters. Another consideration is the demand for mechanical-meter replacements that are as inexpensive as possible. In parts of the developing world where many new customers are being connected to the grid, the low cost of the project is its main attraction as well.
In the first part energy calculation module had been developed which measures the current and voltage, convert it into a digital form and then compute the instantaneous power. In prepaid meter case we interfaced the keypad to enter the card number .every card no entered has some units against it when the correct code is entered user gets the certain amount of units which he can consume further when the units are less than a certain level the system intimates the user to recharge the card/units by setting on the buzzer to avoid supply cut off. When all units are consumed the controlling module switches off the supply by operating the relay. To avail the electric power the user now must have to enter the valid card.
Description
Project Advisor:Miss Masooma Atiq
Keywords
BS Thesis, WAPDA, metering system