Pdf design and building a singlephase smart energy meter using. An electric meter or energy meter an electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business or machine electromechanical meters ac voltage load indicator voltage coil current coil al dial permanent magnet i. Different types of density meter process characterization device. Design and implementation of wireless energy meter system. Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. Digital frequency meter circuit diagram and working principle. This electronic meter does not possess any rotating parts, and the. Microcontroller based wireless energy meter working.
The file may be stored either in the same directory as the mtr file meter file option or in a f ixed. The energy reader can collect the energy consumption reading from the energy meter wirelessly. The electricity consumption meter shown in the figure facilitates the billing of energy meter along with load control using wireless gsm technology. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. A modern digital electronic wattmeter energy meter samples the voltage and current thousands of times a second. A multimeter ora multitester, also known as a voltohm meter or vom is, an. The energy meter whether it is electronic or earlier electromechanical is. The digital frequency meter is commonly called a counter since it determines the frequency by electronically counting the number of cycles of an unknown signal in a standard time interval, usually 1 second. Electrical energy meters principles and applications energy management. These are capable of communicating in both directions. These devices find their application in energy measurement and have the. The basic principles here apply equally to polyphase circuits.
Electricity meters are typically calibrated in billing units, the most common one being the kilowatt hour. Aug 10, 2010 an electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business or machine. All of these sensors are also used in the electronic power meter described in this manual. The aim of this project is to design a sample meter can accurately display real voltage. The following is a basic explanation of how bidirectional metering works. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers. Secondly, the orientation problem associated with electromechanical energy meter is completely a nonissue in a digital energy meter. The meter platform will measure energy accurately over varying environmental conditions. The conventional method of electricity billing involves a person from the distribution unit reading the number of units of electricity consumed in the energy meter, conveying this information to the distribution unit and then preparing the bill according to the units consumed for a fixed amount of time. Analog meters attain the required measurements by continuoustime processing of the input signals using analog circuits. So energy meters measure the rapid voltage and curren. Digital multimeter working a digital multimeter dmm is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. To calculate power utilization, cost in a home and display its values, and also implement the prepaid card system using embedded system technology and also display using lcd. The analog front end afe consists of up to three analogtodigital converters.
When measurements are performed with upstream transformers, the displayed energy value must be multiplied by the transformation ratios. In particular, conventional current flows into the positive terminal for an upscale meter deflection as shown in above figure. Pdf this paper produces the design and building a system that gives a. Jul 25, 2018 energy meters are the basic part to measure the power consumption. They can transmit the data to the utilities like energy consumption, parameter values, alarms, etc and also can receive information from utilities such as automatic meter reading system, reconnectdisconnect instructions, upgrading of meter softwares and other important messages. The function of recording or registering mechanism is to record continuously a number on the dial which is proportional to the revolutions made by the moving system.
Single phase energy meter theory pdf download mastercard. As in the block diagram, the meter has a power supply, a metering engine, a processing and communication engine i. Electrical energy meters principles and applications. Fast digital calibration procedure for stpm01 based energy meters. The following figure describes the basic working principle of digital frequency meter. The focus meter was designed to be a lowcost, solidstate, kwhonly meter as an alternative metering and amr platform to the induction meter. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation. Mar 27, 2016 there are basically 3 types of energy meters. An electricity meter, electric meter, electrical meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, a. Digital multimeter working principle analyse a meter.
Digital meters are introduced, as are types of voltmeters and ammeters operating on different techniques of analogto digital signal converters. To the other terminal of the gate, a pulse of 1 sec is applied as shown in the fig. This is a microcontroller based wireless energy meter, as 8051 microcontroller is used for controlling the entire system. The rotation of this disk is base of energy measurement 8. Electromechanical energy meters have been the standard for metering the electricity since billing began. It involve four steps in its working driving force moving system breaking system registering system 7. It is used everywhere, no matter how big or small consumption it is. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power. Implementation of a singlephase electronic watthour meter. A typical multimeter may include features such as the ability to measure. Apr 17, 2014 energy meter an electricity meter or energy meter is a device that measures the amount of electric energy consumed by a residance,business or an electrically powered device. The more advanced models are called smart meters, while the simple models are called amr meters. A modern digital electronic wattmeter energy meter samples the voltage.
Here we discuss the construction and working principle of induction type energy meter. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. But these are now being gradually replaced by electronic digital energy meters. The measurement results are displayed either in analog form, for instance, as an electromechanical meter, or in digital form, by. An electric meter or energy meter is a device that measures the amount of electrical energy supplied to or produced by a residence, business or machine. Designing smart meters for the smart grid meera balakrishnan. Working closely with industry leaders to further develop solutions in this space.
Voltmeter working principle if an ammeter is of dc type, then it has polarity signs on it for ensuring appropriate connection for an upscale indication. Instrumentation and control us department of energy. Bidirectional metering is available to customers who install renewable fuel generators such as solar, wind, hydro or biomass sources and operate the generator in parallel with their electric companys electrical system. Implementation of a singlephase electronic watthour meter using. Aug, 2006 basic block diagram of an electronic energy meter. Dc electric power i v electric r power unit w aqvit v pvi tt t. A list of some manufacturers of electronic voltmeters, ammeters, and oscilloscopes is. The msp430f6736a source code along with the evm430f6736 design files that. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Some can also measure other electrical quantities such as frequency or even temperature. It is often incased in glass and has a disk that rotates that. The mechanical meters for electricity, gas and water are being replaced with new digital meters in much of the industrialized world.
Nov 29, 2014 the traditional form of wattmeter is called as dynamometer wattmeter. When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity. Energy meters are the basic part to measure the power consumption. All multimeters measure ac and dc voltage voltmeter, ac and dc current ammeter, and resistance ohmmeter. Energy meter types and measurements electromechanical meters. The meter is provided with a field to which entries can be made for this purpose ct or vt factor. The working principle of conventional energy meter is that there is. Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. Implementation of a singlephase electronic watthour.
It is used in domestic and industrial ac circuit for measuring the power consumption. This device is available in a purely electronic form too which is known as digital wattmeter. The number of pulses counted at the output terminal during. Electronic energy meter industrial applications vishay. Handbook on electricity meters asiapacific economic cooperation. Energy meter circuit detailed project with source code. Jan 02, 2019 digital voltmeters working principle of digital voltmeter january 2, 2019 march 21, 2016 by electrical4u voltmeter is an electrical measuring instrument used to measure potential difference between two points. This paper presents a single phase electrical energy meter based on a microcontroller from microchip technology inc. They can store energy consumption data up to 2 years in eeprom.
The advantages of highly functional threephase meters for digital energy measurement have been demonstrated in north americas commercial and industrial. T he digital household energy meter had been configured as the view er of the. Different types of energy meters electrical concepts. Moving system energy meter has a moveable aluminum disk in it which is mounted on a vertical shaft. Pdf the energy metering technology used presently in nigeria is not highly reliable. The digital signals are then processed using a dsp or a microcontroller, which then displays the amount of energy consumed on a lcd or a led display. A single phase microcontroller based energy meter conference paper pdf available in conference record ieee instrumentation and measurement technology conference 2.
By implementing the watthour meter, we can know how much amount of electrical energy is used by a consumer or a residence or an electrically powered device or a business. The true power divided by the apparent voltamperes va is the power factor. Show full abstract each crawler downloads large files andor. The meter is based on reliable, field proven digital multiplication measurement technique. So the eem is known as static energy meter in eem the accurate functioning is controlled by a specially designed ic called asic application specified integrated circuit. Even as energy grids are aging, they need to evolve by getting more resilient to physical and cyber threats. Prepaymentprepaid energy meter introduction and working. The average of the instantaneous voltage multiplied by the current is the true power. Process characterization devices work on the principle of gravity to calculate the density of a sample.
This article is about watthour meter circuit and its working principles. Electromechanical type the electromechanical induction meter operates by counting the revolutions of a nonmagnetic, but electrically conductive, metal disc which is made to rotate at a speed pro. As shown in the block diagram, in a typical digital multimeter the input signal i. What is the solution for the drawbacks of commonly used energy meters. A second terminal block between the current transformer and the meter simplifies service work. The energy is the total power consumed and utilised by the load at a particular interval of time. Singlephase electric meter with isolated energy measurement.
Pdf a single phase microcontroller based energy meter. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. It is often incased in glass and has a disk that rotates that measures the amount of power product of current and voltage the flows through the meter. A flexible hose is used to determine the change in weight. These meters digitally measure the energy and other factors like voltage, current, instantaneous power and show them on a lcd. What is the working principle of energy meter answers. Thirdly, the user friendly display in the digital meters makes energy reading from time to time very easy. Meanwhile, the problem of the distorted current waveform from loads need to be considered. As shown in the above figure, the wattmeter has two sets of coils. Digital energy meters are the 2 nd generation of energy meters.
Utilities are one of the electrical departments, which install these instruments at every place like homes, industries, organizations, commercial buildings to charge for the electricity consumption by loads such as lights, fans, refrigerator, and other home appliances. The software supports calculation of various parameters for singlephaseenergy measurement. Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. Electronic meters consists of current and voltage sensors which sense the amount of current and voltage consumed and this analog signal is sampled and digitized using adcs. Ammeter definition and working principle electrical. The conventional mechanical energy meter is based on the phenomenon of magnetic induction. Drm121, mqxenabled mcf51em256 singlephase electricity meter. Electronic meters need for prepaid energy meter system. It enables systematic pricing of energy consumed by individual consumer as it measures the amount of electrical energy consumed by a.
This application report has the complete metrology source code provided as a zip file. The dynamometer wattmeter works on the motor principle. An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter.
Design and implementation of wireless energy meter system for. These are displayed on the liquid crystal display attached to the circuit. Digital energy meters by the millions analog devices. Vvavb and if vavb, thus the charage dq carry out work the work defined by.
Based on energy meter measurements the customer gets a bill and has to pay for energy consumption. Iicharacteristics of different types of sensors a active vs. Design of a smart energy meter with overload trip facilities ijeat. It is in the interest of the customer and the electricity company that the meter, which counts the energy consumption, is working properly and accurately. Digital energy meters came in single phase and 3 phase both types. What are the different types, how do they work and what are the health issues. Electric meter developers often prefer to separate the energy measurement function from the host processor. Principle wem monitors the energy consumption for a single phase supply. This is also known as energy meter which is used in developing electrical and electronic.
The signal waveform whose frequency is to be measured is converted into tngger pulses and applied continuously to one terminal of an and gate. The basic unit of power is watts and it is measured by using a watt meter. A digital multimeter dmm is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. What is the differance between digital energy meter. Digital multimeter working principle electrical a2z. In this paper, we present the design and implementation issues of a bluetoothenabled energy meter. What is the working principle of energy meters measure. What are the advantages and disadvantages of usual energy meters. It has a rotating aluminium wheel called ferriwheel and many toothed wheels. Types of energy meters and their working principles elprocus. The key parameters calculated during energy measurements are root mean square rms current and voltage, active and reactive power and energy, power factor, and frequency. If a meter is used in combination with a current transformer. If one uses one kilowatt in onehour duration, one unit of energy gets consumed.
849 80 567 42 733 370 221 822 1289 863 703 1045 1187 39 486 668 771 984 275 1299 281 1274 493 1390 1444 145 131 850 821 454 64 960 763 1266 14 1029