The meter is based on reliable, field proven digital multiplication measurement technique. This is a microcontroller based wireless energy meter, as 8051 microcontroller is used for controlling the entire system. 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. Even as energy grids are aging, they need to evolve by getting more resilient to physical and cyber threats. The msp430f6736a source code along with the evm430f6736 design files that.
This article is about watthour meter circuit and its working principles. 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. Energy meters are the basic part to measure the power consumption. Electrical energy meters principles and applications. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power. It enables systematic pricing of energy consumed by individual consumer as it measures the amount of electrical energy consumed by a.
Watthour meter is in fact a measuring device which can evaluate and records the electrical power passing through a circuit in a certain time. The energy is the total power consumed and utilised by the load at a particular interval of time. The number of pulses counted at the output terminal during. Pdf this paper produces the design and building a system that gives a. Mar 27, 2016 there are basically 3 types of energy meters. Working principle and construction of energy meter video lecture of measurement of capacitance chapter in subject electronic instrumentation. The meter platform will measure energy accurately over varying environmental conditions. What is the working principle of energy meter answers. Single phase energy meter theory pdf download mastercard. An electric meter or energy meter is an essential device that goes with consumption of commercially distributed energy. So energy meters measure the rapid voltage and curren. Pdf design and building a singlephase smart energy meter using. In particular, conventional current flows into the positive terminal for an upscale meter deflection as shown in above figure.
Pdf a single phase microcontroller based energy meter. Design and implementation of wireless energy meter system. The file may be stored either in the same directory as the mtr file meter file option or in a f ixed. But these are now being gradually replaced by electronic digital energy meters. This paper presents a single phase electrical energy meter based on a microcontroller from microchip technology inc. A modern digital electronic wattmeter energy meter samples the voltage. Presented here is a simple energy meter using analog devices ade7757 chip for singlephase, 2wire phase and neutral systems used in households. Show full abstract each crawler downloads large files andor. Analog meters attain the required measurements by continuoustime processing of the input signals using analog circuits. It has a rotating aluminium wheel called ferriwheel and many toothed wheels. These devices find their application in energy measurement and have the. Digital multimeter working principle electrical a2z. Instrumentation and control us department of energy. This application report has the complete metrology source code provided as a zip file.
A flexible hose is used to determine the change in weight. Electricity meters are typically calibrated in billing units, the most common one being the kilowatt hour. Jul 25, 2018 energy meters are the basic part to measure the power consumption. In order to accurately measure the electronic energy used for a electronic energy meter, suitable hardware and software have to be designed. The average of the instantaneous voltage multiplied by the current is the true power. Vvavb and if vavb, thus the charage dq carry out work the work defined by. 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. When measurements are performed with upstream transformers, the displayed energy value must be multiplied by the transformation ratios.
The basic unit of power is watts and it is measured by using a watt meter. As shown in the block diagram, in a typical digital multimeter the input signal i. These are capable of communicating in both directions. The aim of this project is to design a sample meter can accurately display real voltage. In this paper, we present the design and implementation issues of a bluetoothenabled energy meter. Implementation of a singlephase electronic watthour. Microcontroller based wireless energy meter working. Digital meters are introduced, as are types of voltmeters and ammeters operating on different techniques of analogto digital signal converters. Nov 29, 2014 the traditional form of wattmeter is called as dynamometer wattmeter. Digital energy meters by the millions analog devices. 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. 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. Fast digital calibration procedure for stpm01 based energy meters. 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. Different types of energy meters electrical concepts. 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. Working closely with industry leaders to further develop solutions in this space. Meanwhile, the problem of the distorted current waveform from loads need to be considered. The measurement results are displayed either in analog form, for instance, as an electromechanical meter, or in digital form, by. Some can also measure other electrical quantities such as frequency or even temperature.
Based on the flow of current, the ferriwheel rotates which makes rotation of other wheels. 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. The following is a basic explanation of how bidirectional metering works. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. The conventional mechanical energy meter is based on the phenomenon of magnetic induction.
Principle wem monitors the energy consumption for a single phase supply. If one uses one kilowatt in onehour duration, one unit of energy gets consumed. Ammeter definition and working principle electrical. This electronic meter does not possess any rotating parts, and the. Electronic energy meter industrial applications vishay. It is used everywhere, no matter how big or small consumption it is. Implementation of a singlephase electronic watthour meter using. 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. All multimeters measure ac and dc voltage voltmeter, ac and dc current ammeter, and resistance ohmmeter.
Thirdly, the user friendly display in the digital meters makes energy reading from time to time very easy. If a meter is used in combination with a current transformer. 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 energy meter whether it is electronic or earlier electromechanical is. The basic principles here apply equally to polyphase circuits. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Digital multimeter working principle analyse a meter. All of these sensors are also used in the electronic power meter described in this manual.
Design of a smart energy meter with overload trip facilities ijeat. The signal waveform whose frequency is to be measured is converted into tngger pulses and applied continuously to one terminal of an and gate. What is the working principle of energy meters measure. A second terminal block between the current transformer and the meter simplifies service work. Moving system energy meter has a moveable aluminum disk in it which is mounted on a vertical shaft. 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. Here we discuss the construction and working principle of induction type energy meter. Energy meter circuit detailed project with source code.
Singlephase electric meter with isolated energy measurement. Based on energy meter measurements the customer gets a bill and has to pay for energy consumption. The following figure describes the basic working principle of digital frequency meter. 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. The advantages of highly functional threephase meters for digital energy measurement have been demonstrated in north americas commercial and industrial. A list of some manufacturers of electronic voltmeters, ammeters, and oscilloscopes is. The electricity consumption meter shown in the figure facilitates the billing of energy meter along with load control using wireless gsm technology. The meter is provided with a field to which entries can be made for this purpose ct or vt factor. It is used in domestic and industrial ac circuit for measuring the power consumption. 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. Electronic meters need for prepaid energy meter system. Implementation of a singlephase electronic watthour meter. As in the block diagram, the meter has a power supply, a metering engine, a processing and communication engine i. The mechanical meters for electricity, gas and water are being replaced with new digital meters in much of the industrialized world.
Digital voltmeters working principle of digital voltmeter. It is often incased in glass and has a disk that rotates that. Digital energy meters are the 2 nd generation of energy meters. 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. 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. These meters digitally measure the energy and other factors like voltage, current, instantaneous power and show them on a lcd. Dc electric power i v electric r power unit w aqvit v pvi tt t.
A digital multimeter dmm is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. Electronic energy meter is based on digital micro technology dmt and uses no moving parts. A modern digital electronic wattmeter energy meter samples the voltage and current thousands of times a second. Electrical energy meters principles and applications energy management. Digital energy meters came in single phase and 3 phase both types. Secondly, the orientation problem associated with electromechanical energy meter is completely a nonissue in a digital energy meter. Designing smart meters for the smart grid meera balakrishnan. It involve four steps in its working driving force moving system breaking system registering system 7.
What is the differance between digital energy meter. 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. Electric meter developers often prefer to separate the energy measurement function from the host processor. The dynamometer wattmeter works on the motor principle. The analog front end afe consists of up to three analogtodigital converters. They can store energy consumption data up to 2 years in eeprom.
What are the advantages and disadvantages of usual energy meters. T he digital household energy meter had been configured as the view er of the. The more advanced models are called smart meters, while the simple models are called amr meters. Pdf the energy metering technology used presently in nigeria is not highly reliable. What are the different types, how do they work and what are the health issues. 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. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers. The focus meter was designed to be a lowcost, solidstate, kwhonly meter as an alternative metering and amr platform to the induction meter. Different types of density meter process characterization device.
Prepaymentprepaid energy meter introduction and working. This device is available in a purely electronic form too which is known as digital wattmeter. Iicharacteristics of different types of sensors a active vs. 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. 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 working principle of conventional energy meter is that there is. A multimeter ora multitester, also known as a voltohm meter or vom is, an. Digital frequency meter circuit diagram and working principle. A typical multimeter may include features such as the ability to measure. A single phase microcontroller based energy meter conference paper pdf available in conference record ieee instrumentation and measurement technology conference 2. Process characterization devices work on the principle of gravity to calculate the density of a sample.
Using the principle of beam deflection of two fixed ends, the weight can be calculated. When used in electricity retailing, the utilities record the values measured by these meters to generate an invoice for the electricity. 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. The software supports calculation of various parameters for singlephaseenergy measurement. 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. 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 true power divided by the apparent voltamperes va is the power factor. Design and implementation of wireless energy meter system for. Pdf design and implementation of bluetooth energy meter. This is also known as energy meter which is used in developing electrical and electronic. As shown in the above figure, the wattmeter has two sets of coils. Energy meter types and measurements electromechanical meters.
Types of energy meters and their working principles elprocus. The electronic energy meter is also better protected against tampering than its mechanical predecessor, and units for prepaid operation e. What is the solution for the drawbacks of commonly used energy meters. These are displayed on the liquid crystal display attached to the circuit. 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. Drm121, mqxenabled mcf51em256 singlephase electricity meter. The energy reader can collect the energy consumption reading from the energy meter wirelessly. 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.