18-07-2015, 10:25 PM
ABSTRACT OF PROJECT
INTRODUCTION
BLOCK DIAGRAM
CIRCUIT DIAGRAM
APPLICATIONS
REQUIREMENTS AND COMPONENTS LIST
REFRENCES
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energy meter per day average maximum minimum load displayed on lcd
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ABSTRACT OF PROJECT
INTRODUCTION
BLOCK DIAGRAM
CIRCUIT DIAGRAM
APPLICATIONS
REQUIREMENTS AND COMPONENTS LIST
REFRENCES
23-03-2017, 02:24 PM
The electricity supply office sends the bill of consumption of the previous month depending on the consumption indicated by the conventional electric meter placed in a domestic or commercial premises. The consumer who then goes to the electricity office, stands in front of a long queue to pay the bill. This process is very cumbersome and dangerous and also very profitable for both suppliers and users. Advanced energy meter researches develop many new and cost-effective technologies to build energy meters that help at the same time improve billing system as well as payment system. In this work, we have explained a new concept of energy meter with power factor meter and instrument transformer with embedded technology. The proposed energy meter is smart enough also for the billing and payment system. This meter can automatically disconnect the power line with the meter circuit in the absence of anyone in the room or in the office and therefore is useful in saving energy. The proposed meter uses a prepaid smart card. For the first time, the consumer has to pay an amount according to the maximum demand and the smart card will be recharged accordingly. Then, when the recharge value is equal to the stop value, the smart meter must provide a warning and reload the card. The card can be recharged through the bank network, Davit / credit card just like any other rechargeable card.
The energy meter is a device that measures the amount of electrical energy consumed by a domestic consumer or a commercial consumer. There are basically two different types of energy meter, namely electromechanical type energy meter and electronic energy meter. Advanced research in energy meter develops the elegant energy meter which is the modification of the two basic types. The electromechanical type basically includes energy meter of the type of induction. The induction type energy meter operates by counting the number of revolutions of a lightweight non-magnetic and conductive metal disk (aluminum disk) that is freely rotated between two magnetic fields, which are proportional to the load voltage and the current of Charge and, Power passing through the meter. Here the drive torque is produced by the interaction between the magnetic fluxes produced by two electromagnetic coils, namely the coil of pressure and the current coil. The pressure coil is connected in parallel while the current coil is connected in series with the load. Therefore, the pressure coil generates a magnetic flux proportional to the load voltage and the current coil generates a flux proportional to the load current. Therefore, the drive torque is proportional to the load voltage, the load current and the power factor between them. Two major drawbacks of this type of meter are drag error and phase angle error. Also, the instrument is too heavy to carry. Due to the change in the frequency of supply, it causes error. Friction also affects your readings. This type of meter is now almost obsolete. On the other hand, the electronic energy meter (EEM) has no moving parts and its operation is based on digital microtechnology. The different parts of this type of meters are potential transformer, current transformer, analog circuits, A / D converter, specially designed for specific applications of integrated circuits operated in incorporated technology and that controls the operations of the meter. The sampled input voltage is compared to a pre-programmed reference voltage. The comparator output is then converted to digital value using the A / D converter.
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