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393 results about "Energy metering" patented technology
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Internet of things intelligent home system and method
The invention discloses an Internet of things intelligent home system and a method. The system comprises intelligent home equipment, an access and transmission network and an intelligent home service system, wherein the intelligent home equipment comprises sensing equipment, control equipment, an alarm device, a router and an intelligent home comprehensive gateway; the access and transmission network is a remote transmission broadband network for finishing interaction between the intelligent home service system and a background service system; and the intelligent home service system comprises a user terminal and the background service system. According to the method, the Internet of things intelligent home system is divided into an intelligent home basic service and a cell public service; the intelligent home basic service comprises abnormal situation alarming, environment monitoring and home energy metering; and the cell public service comprises public resource metering, comprehensive data acquisition and analysis, management and optimization and other services supplied by a third party. The Internet of things intelligent home system can alarm abnormal situations, monitor environments, meter home energy and comprehensively manage and control home information, so that the security of the system is guaranteed.
Owner:感知企银科技(无锡)有限责任公司
Electric power distribution system including metering function and method of evaluating energy metering
An electric power distribution system is used with an electric power source. The electric power distribution system includes a first device exchanging first electric power with the electric power source. The first device exchanges the first electric power with a plurality of second devices and meters first electric energy corresponding to the first electric power. The second devices exchange the first electric power with the first device. Each of the second devices exchanges second electric power as at least part of the first electric power with a number of corresponding electric loads and meter second electric energy corresponding to the second electric power. A processor includes a routine that compares the metered first electric energy from the first device with a sum of the metered second electric energy from each of the second devices, and responsively determines proper or improper operation of the electric power distribution system.
Owner:EATON INTELLIGENT POWER LTD
Advanced valve actuator with integral energy metering
ActiveUS20140277764A1Sampled-variable control systemsMechanical apparatusEnergy meteringAutomatic control
An automatic control valve actuator assembly is configured to control opening and closing of the valve via positioning of a valve closure member. The valve actuator is further configured to determine the volume of fluid flowing through the valve. In an embodiment, the valve actuator includes an integral energy consumption calculation and retention module configured to calculate heat energy for energy consumption tracking.
Owner:SCHNEIDER ELECTRIC BUILDINGS AMERICAS INC
Distributed renewable energy metering
ActiveUS20130090935A1Data processing applicationsInformation technology support systemEnergy meteringComputer module
A distributed renewable energy system includes a renewable energy generating module having an array of renewable energy generators connected to a population of distributed power inverters. The distributed renewable energy system also includes a distributed energy metering module having a data aggregating unit that receives output energy data from the population of distributed power inverters and a data processing unit that calculates a revenue grade output energy from the output energy data based on a tolerance probability characteristic of the output energy data. The distributed renewable energy system additionally includes a distributed energy reporting module that reports the revenue grade output energy. A method of measuring distributed renewable energy is also provided.
Owner:LENNOX IND
Luminaire controller
Described herein is a luminaire controller for a luminaire in which dimming signals can be provided to control the operation of the luminaire. The controller also includes an energy measurement module connected to a mains supply, a sensor module, a power switch, a central processing module and a ZigBee transceiver module. The controller, in addition to providing dimming signals in accordance with ambient lighting conditions sensed by a photocell in the sensor module provides efficient energy metering. In one embodiment, the luminaire controller is directly mountable on a luminaire which is to for control thereof.
Owner:SCHREDER SA
Electric bicycle intelligent charging pile and charging control method thereof
PendingCN106899059AEasy to useAutomatic settlementCharging stationsIndicating/monitoring circuitsElectricityEnergy metering
The invention relates to an electric bicycle intelligent charging pile and a charging control method thereof. The charging control method utilizes the technology of Internet of Things, achieves remote monitoring and parameter modification by using background software in a wired or wireless way, manages decentralized charging sockets in a centralized way, solves a problem that the conventional charging sockets are independently controlled and are not managed in a centralized way. A user can check a consumption condition and a current charging state at a cell phone app at any time. The electric bicycle intelligent charging pile can accurately measure energy, voltage, current, and power, achieves an energy metering accuracy over 1.0 level, supports different payment modes so as to satisfy the user demands to the utmost extent. The electric bicycle intelligent charging pile utilizes the charging characteristic of the electric bicycle, has a self full charging test function, prevent battery overcharging caused by long-time charging in order to prevent a decrease in the service life of the battery, and can also achieve overload protection in order to prevent fire caused by overloading of the socket.
Owner:常州东晟合众节能科技有限公司
Intelligent building energy management system based on technology of internet of things
ActiveCN103236102AAdapt to dynamic changesAutonomousIndividual entry/exit registersAnalysis dataThe Internet
The invention relates to the technical field of energy management, and particularly relates to an intelligent building energy management system based on a technology of the internet of things. The intelligent building energy management system comprises an energy monitoring sub-system, an energy analysis sub-system, an energy metering management sub-system, and a client query control sub-system, wherein the energy monitoring sub-system monitors and controls a working state of energy equipment in real time; the energy analysis sub-system receives, detects and analyzes data; the energy metering management sub-system processes and manages the data; and the client query control sub-system can perform corresponding energy data query and control on related energy equipment for a user. The intelligent building energy management system is non-destructive, intelligent and easy to use, and hardly affects the existing working environment in the deployment process; a plurality of lessees in a building can be supported; each lessee can control a respective area in a building, and can dynamically carry out intelligent analysis according to the factors such as environments, user-defined modes, and parameters; the interaction of a networked sensor and energy equipment is determined; and the targets of saving energy and reducing emission is achieved under the condition of not reducing the environmental comfort level are also achieved.
Owner:SHANGHAI USKY TECH CO LTD
GPS time service and clock calibrating device for electric power measurement
InactiveCN101363906AEnsure safetyReduce time errorSetting time indicationRadio-controlled time-piecesMicrocontrollerEnergy metering
The invention discloses an energy metering, GPS timing and clock calibrating device which comprises a singlechip, a GPS module, a liquid crystal display, and the like. Aiming at the phenomenon that an energy metering device has larger and worse real time clock errors, the device adopts the GPS technology, receives the standard clock signal of GPS through the GPS module, displays the time of the GPS on the liquid crystal display, and carries out the calibration to the real-time time of the energy metering device. The reference time provided by the GPS is utilized for providing the time calibrating reference, and greatly reducing the timing error of a watt-hour meter.
Owner:STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
Active damping scheme for multiple LCL inverter resonant coupling
InactiveCN104821706AReduce Harmonic Distortion RateImprove reliabilitySingle network parallel feeding arrangementsHarmonic reduction arrangementReference currentFull wave
The invention provides an active damping scheme for multiple LCL inverter resonant coupling. The active damping scheme comprises a distributed grid-connected power generation system formed by the series connection of a plurality of photovoltaic LCL inverters and a full wave energy metering device. The control structure of the current and active damping control link of each of the LCL inverters comprises an inverter reference output current calculation link, a photovoltaic power front feed reference current compensation link, an inverter output current deadbeat control link and an active damping compensation link. According to the control method of the invention, the harmonic distortion rate of grid-connected total current can be reduced, the metering data reliability of the full wave energy metering device is effectively improved, the specific harmonic amplification interference of inverter output current by the self resonant point of a single inverter filtering link is effectively reduced, the parallel connection resonant coupling among multiple inverter filtering links is effectively reduced, the independence of each inverter output current is ensured, and the interference of the inverter output current by power grid harmonic voltage is effectively reduced. According to the active damping scheme, the safe and stable operation of an inverter parallel system can be ensured.
Owner:STATE GRID CORP OF CHINA +2
Control method for dynamic balancing electric regulating valve with energy metering function and valve thereof
ActiveCN1837996AAchieve balanceSimple structure and processEqualizing valvesSafety valvesEnergy meteringDynamic balance
This invention relates to a control method for dynamic balancing electric regulating valve with energy metering function and valve thereof. To This intelligent valve, opening the butterfly valve with an electric actuator to let water flow in from interval channel of front valve to cross the pore plate and butterfly valve and final flow out from the interval channel of the back valve; arranging meters on ends of the pore plate to measure dynamic pressure difference; arranging temperature sensors for valve body and water supply pipe to measure temperature difference and compute energy. This invention has ideal regulation characteristic with simple construction and low cost, and has obvious benefit to comprehensive energy conservation.
Owner:HANGZHOU ZETA TECH
Energy-saving metering and control system based on technology of Internet of things
InactiveCN101893889AAchieve energy consumptionEasy to controlEnergy efficient ICTTransmissionGSMInternet of Things
The invention discloses an energy-saving metering and control system based on the technology of Internet of things. The system is mainly composed of four modules, namely a energy collection module, a data transmission module, a data processing and control center and a system software, wherein the energy acquisition module comprises a energy sensing node and a collector; the data transmission module comprises a data transmission network using an RS232 interface for connection; the data processing center is composed of a database server, a data query module and a data analysis module which are connected together through a data bus; the collector of the energy collection module is connected with the data transmission module through the RS232 interface in the modes such as infrared communication and radio frequency identification; and the data transmission module transmits data to the data bus through GPRS DTU, GSM, CDMA and China Mobile and China Unicom public networks. The system of the invention utilizes the technology of Internet of things to integrate each energy metering, realize the integral combination control and achieve the aim of energy-saving and emission reduction.
Owner:袁中华
Electric energy metering device overall error detecting method, device and system
ActiveCN106338706ARealize self-checkingIncrease credibilityElectrical measurementsBlack outEnergy metering
The invention is applicable to the field of electric energy metering and provides an electric energy metering device error self-checking method, device and system. The method comprises the steps that a system to be detected accesses the error criterion device of at least one known overall error value, wherein the error criterion device comprises an electric energy metering chip, a circuit thereof, a voltage sensor and a current sensor; each electric energy metering device and the error criterion device measure and record the respective electric energy data in a preset manner and report the data to a data processor; and an error calculator calculates the overall error of each energy metering device according to received and processed electric energy data and load current segment consideration. According to the embodiment provided by the invention, overall error self-checking of the electric energy metering device is realized; the problems that an overall error cannot be detected; errors of a current transformer and a voltage transformer of the metering device are detected in the field in the case of black out; and a large number of metering devices cannot be detected according to the law in the prior art are solved.
Owner:侯飞
Electric energy metering system substation
ActiveCN101776711ARealize a high degree of sharingEnsure data securityElectrical measurementsTransformerWorkstation
The invention discloses a novel electric energy metering system substation comprising a metering device, transformer substation monitoring active and standby servers (transformer substation monitoring system background), a forward isolation device and an electric energy metering retransmission workstation, wherein the forward isolation device divides the system electric energy metering system substation into two zones with different security levels, i.e. a security I zone (real-time control zone) and a security II zone (non-control production zone); the transformer substation monitoring active and standby servers belong to the system security I zone and are used for directly collecting and processing original electric energy metering data; an intelligent electric energy meter is accessed into the unit by an optical fiber, and the unit retransmits the synchronous electric energy metering data of the workstation by the forward isolation device; the electric energy retransmission workstation is arranged in the outside screen of the isolation device and belongs to the security II zone; the unit can store and retransmit electric energy metering data and transmits electric energy metering data obtained from the monitoring background to a metering master station by the IEC870-5-102 covenant. As a novel electric energy metering system substation, the invention realizes the integration design of transformer substation monitoring and electric energy metering, simplifies redundant configuration, makes data security level clear, conforms to the safety specification of an electric power system and conforms to the development tendency of a digital transformer substation.
Owner:NORTH CHINA GRID +3
Integrated device suspended at high voltage potential for power energy metering and protection of distribution network
InactiveUS20130057255A1Compact structureEasy to integrateTariff metering apparatusBase element modificationsLow voltageHigh pressure
An integrated device suspended at a high voltage potential for the metering and protection of a distribution network comprises a measurement current transformer (CT), a protective CT and a voltage sensor. The voltage signal is output from the voltage sensor to an electric energy metering module and first and second electric signal acquiring modules. The current signal acquired by the measurement CT is output to the electric energy metering module. The current signal acquired by the protective CT is output to the first and second electric signal acquiring modules. The electric energy metering module processes the current and voltage signals and sends the processed data to a comprehensive control module. The first and second electric signal acquiring modules send the voltage and current data to the comprehensive control module. The comprehensive control module comprehensively calculates the received data and sends the result to a low voltage terminal.
Owner:WUHAN GUOCE SCI & TECH
Fuel gas energy metering method
ActiveCN104197984ASatisfy informatizationFulfil requirementsTransmission systemsFuel testingEnergy meteringProcess engineering
The invention relates to a fuel gas energy metering method. The method is characterized by comprising the following steps: (1), obtaining parameters of pressure, temperature, a working condition flow, a fuel gas heating value and fuel gas components through an energy metering volume correcting meter; (2), calculating the unit volume heat of the fuel gas through an energy metering center, and then sending the result to the energy metering volume correcting meter to complete the calculation of the energy value; and (3), calculating the energy flow and the energy increase of the fuel gas in the metering period through the energy metering volume correcting meter, displaying the results of the volume metering and the energy metering through a display window of the energy metering volume correcting meter, uploading the results to the energy metering center through a wireless communication network, and completing the metering of the volume flow and the fuel gas energy under the base conditions by adopting the remote assignment fuel gas heat, the local sampled parameters about the flow, the temperature and the pressure.
Owner:TANCY INSTR GRP
ZIGBEE technology-based three-phase guide rail-type installed electric energy meter
ActiveCN102062814AReduce volumeEasy to installTransmission systemsElectrical measurementsReal-time clockWireless transmission
The invention relates to a ZIGBEE technology-based three-phase guide rail-type installed electric energy meter, which comprises an external component and an internal component, wherein the internal component comprises an energy metering chip module, a master control chip, a real-time clock chip, a ZIGBEE communication module, a voltage signal acquisition module, a current signal acquisition module, an external storage, a display circuit module, a power module and a calibration pulse output module; the power module is connected with the master control chip, the voltage signal acquisition module, the current signal acquisition module and the ZIGBEE communication module respectively; the energy metering chip module is connected with the voltage signal acquisition module and the current signal acquisition module respectively; and the master control chip is connected with the energy metering chip module, the real-time clock chip, the ZIGBEE communication module, and the external storage and the display circuit module respectively. Compared with the prior art, the invention has the advantages of small size, high integration, wireless transmission function and the like.
Owner:ACREL
Systems and methods for prepaid electric metering for vehicles
ActiveUS8583551B2Special tariff metersPower measurement by digital techniqueEnergy meteringEngineering
A method for delivering energy to an electric vehicle is provided, wherein the electric vehicle is associated with a customer account. The method includes identifying the electric vehicle at an energy delivery point, and determining a current balance of the customer account, wherein the current balance includes at least a portion of a prepayment amount based on a predetermined amount of energy to be delivered to the electric vehicle at the energy delivery point. The method also includes delivering energy to the electric vehicle, metering an actual amount of energy delivered to the electric vehicle, and determining a transaction amount based on the actual amount of energy delivered to the electric vehicle at the energy delivery point.
Owner:GENERAL ELECTRIC CO
Fuel gas metering method and device based on energy metering
ActiveCN103542904AReasonable measurement method of gas consumptionIndirect mass flowmetersEnergy meteringEnergy based
The invention discloses a fuel gas metering method based on energy metering. The fuel gas metering device receives natural gas component data transmitted by a gas chromatography analyzer and determines real volume heating quantity of natural gas according to the natural gas components, real-time pressure and real-time temperature; then the natural gas use amount Vt under the actual temperature and pressure is metered and converted into fuel gas flow Vn under standard condition; finally, according to Vn, the energy E of the natural gas is determined, and energy metering is finished. The invention further provides a fuel gas metering device based on the energy metering and used for achieving the method. The fuel gas metering device receives the natural gas component data transmitted by the gas chromatography analyzer, the real volume heating quantity of the natural gas is calculated according to the natural gas components and the real-time temperature and pressure, the energy of the natural gas is calculated by combining natural gas volume flow, and energy metering is achieved. The method and device provides a novel metering mode which is reasonable and accurate.
Owner:CHENGDU QIANJIA TECH CO LTD
Network system and method of controlling network system
ActiveUS20130131876A1Efficient managementLow costMechanical power/torque controlLevel controlEnergy meteringNetworked system
Provided are a network system and a method of controlling the same. The network system includes an energy supply part including a plurality of power supply sources, an energy metering part communicating with the plurality of power supply sources, the energy metering measuring energy supplied from the plurality of power supply sources, an energy management part receiving energy-related information supplied from the energy supply part, and an energy consumption part consuming power supplied from the energy supply part, the energy consumption part being operable and controllable by the energy management part. At least one power supply source of the plurality of power supply sources is selected according to an order of priority of a power supply, based on energy information related to the plurality of power supply sources. Thus, the power supply source having minimum costs is selected to efficiently manage energy within an intellectual power supply network.
Owner:LG ELECTRONICS INC
Measuring method for energy metering error of single-phase electric energy meter under dynamic load
InactiveCN101526596AImprove accuracyAvoid the effects of measurement errorsElectrical measurementsCurrent loadEnergy metering
The invention provides a measuring method for energy metering error of a single-phase electric energy meter under dynamic load. The method comprises the following steps of: timing from the rotation of N cycles of the electric energy meter to be measured; collecting load current Ii by one time in every timing cycle Deltat; accumulating collecting time S-1 and accumulating load current (test I); ending the rotation of N cycles of the electric energy meter to be measured, collecting the current load current Is, obtaining timing time T and calculating the current timing interval by the formula Delta1=T-(S-1)*Deltat; calculating the accumulated energy (test II); setting that actual energy Er passing the electric energy meter to be measured is equal to the accumulated energy EO; and calculating error by the formula r=(EX-Er) / Er=(EX-EO) / EO. By measuring the changing load current continuously, the method avoids the influence of change of the load current to the energy metering error, thus greatly improving the accuracy of measuring the energy metering error.
Owner:ZHENGZHOU WONDER ELECTRICAL POWER +1
Device for measuring the intensity of an electric current and electric appliance including such device
ActiveUS20100301836A1Simple and economic designEasy to integrateMeasurement using dc-ac conversionVoltage/current isolationElectrical conductorEnergy metering
A device for measuring the intensity of an electric current which has a simple and economical design and offers a high measurement dynamic compatible with combined measurement, protection and energy metering applications. The device (1) is insensitive to parasitic fields and to the position of the electric conductor to be measured, and that can be opened to facilitate placement thereof. The device (1) defines a closed path (C), about a conductor (2) for the circulation of the lines of magnetic field induced by the current to be measured, and the path is formed by two plates (30) having a high magnetic permeability separated by two air gaps (E) closed by two identical and opposed electric coils (4) for supplying a voltage proportional to the derivative of the intensity (I) of the current to be measured. The device (1) reduces the is compact so that it can be easily integrated into any type of electric appliance.
Owner:SOCOMEC
Motor parameter detector
InactiveCN102621491AHigh degree of automationReduce manual laborDynamo-electric machine testingMicrocontrollerSynchronous motor
The invention discloses a motor parameter detector to solve the technical problem of real-time detection of motor parameters. The detector comprises a hardware platform composed of a central processing unit (CPU) micro control unit (MCU) module, a measurement module, a display module, a communication module and the like. A C8051F340 single chip microcomputer serving as the CPU forms a main control circuit, wherein the single chip microcomputer is connected with a digital signal processor (DSP) chip for power energy metering through a software process improvement (SPI) bus, is connected with a torque sensor, a rotation speed sensor, a winding temperature rising sensor, a liquid crystal display (LCD) screen, a keyboard and a relevant interface circuit, and communicates with principal computer (PC) software through a 485 network, so that further analysis and management of uploaded data are achieved on computers, and a human-computer interaction is achieved; and the DSP chip for power energy metering is connected with a voltage transformer and a current transformer so as to detect three-phase voltage and current signals. The motor parameter detector has the advantages of being capable of collecting electrical parameters for alternating current induction motors and synchronous motors, high in automation degree, and simple to operate, and guaranteeing the accuracy of measurement results and the stability of the system operation on the basis of increasing the instrument operation speed.
Owner:ZHEJIANG SCI-TECH UNIV
Gas energy metering method and device
The invention discloses a gas energy metering method and device, and relates to the field of gas metering.Flow information and heat value information can be metered synchronously, and metering precision is improved.The gas energy metering method includes the steps that flow and physical property parameters of measured gas are measured, wherein it is guaranteed that the flow and physical property parameters of the measured gas come from the same fluid and are obtained at the same moment during measurement; the heat value of the measured gas is calculated through the quantitative relation between the heat value and the physical property parameters of the gas according to the measured physical property parameters; energy of the measured gas is calculated according to the calculated gas heat value and the measured gas flow.
Owner:ENN SCI & TECH DEV
Interconnect and metering for renewables, storage and additional loads with electronically controlled disconnect capability for increased functionality
InactiveUS20170214225A1Coupling device connectionsBatteries circuit arrangementsElectricityEnergy metering
An interconnect box between a utility meter and a main service panel having at least two grid electrical inputs from the utility meter; at least one grid neutral input from the utility meter, wherein the grid electrical inputs and the grid neutral inputs are combined to provide a combined grid stream; at least two external electrical inputs having circuit breakers for each of the at least two electrical inputs; at least one external neutral input; at least one shorting block used to merge together two of the at least two external electrical inputs and one of the at least one external neutral inputs to provide an external merged stream; a central computing unit receives and utilizes power from at least one of the combined grid stream and the external merged stream to generate power and source voltage on energy metering.
Owner:LOCUS ENERGY
Method and apparatus for checking global error of high voltage energy metering installation
InactiveCN101251585ASolve the problem that the overall error verification cannot be performedWith metering accuracyElectrical measurementsError checkingElectricity
The invention relates to an overall error checking method and device of a high voltage electric energy metering device, wherein the device comprises a high-voltage heavy-current testing power source, a checking object, a testing power source stability degree control circuit, a monitoring unit and a benchmark electric energy measuring unit, wherein the high-voltage heavy-current testing power source is used to provide stable and reliable high-voltage heavy-current testing signal; the checking object, which is a high-voltage electric energy metering device, obtains the high-voltage heavy-current signal and generates detecting electric energy value; the testing power source stability degree control circuit is used to detect the amplitude and the phase of the voltage and the current of the high-voltage heavy-current testing signal; the monitoring unit sets needed detecting flow, testing voltage, current and power factor, and obtains the detecting result of the testing power source stability degree control circuit to control the output state of the high-voltage heavy-current testing power source; the benchmark electric energy measuring unit, which obtains the high-voltage heavy-current signal and generates a standard electric energy value, compares the standard electric energy value with the detecting electric energy value at the same time to obtain wattful or wattless electric energy measuring error.
Owner:WUHAN GUOCE SCI & TECH
Reverse power protection method and distributed power generation system
ActiveCN102868175AIncrease profitLow costEnergy industrySingle network parallel feeding arrangementsEnergy meteringComputer module
The invention discloses a reverse power protection method and a distributed power generation system. According to the method, an original bi-directional energy metering module and an original monitoring computer in the distributed power generation system in the prior art are utilized; the monitoring computer receives a reverse power value which flows from a common connection point to a utility grid and is detected by a bi-directional energy metering device firstly, and then judges whether the reverse power value is greater than a predetermined reverse power standard value; and if the reverse power value is greater than a predetermined reverse power standard value, the monitoring computer transmits a command of reducing output power to a generating set so as to reduce the output power of the generating set. By the reverse power protection method and the distributed power generation system disclosed by the embodiment of the invention, the original devices of the system are utilized, and a reverse power protection device does not need to be configured specially, so that the system cost is reduced. Meanwhile, when reverse power appears, the reverse power protection is realized on the promise of not disconnecting any generating set, and the utilization rate of distributed energy resources is improved.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Full voltage range LLC resonant converter and control method thereof
ActiveCN101820222ARealize power conversion functionImprove reliabilityEfficient power electronics conversionDc-dc conversionControl signalElectronic switch
Owner:陶顺祝
Grain and oil processing production line energy management system and management method
InactiveCN104898618AReal-timeRealize managementEnergy industryTotal factory controlProduction lineOil processing
The invention discloses a grain and oil processing production line energy management system and management method. The management system comprises a system management layer, a communication interface layer and a field monitoring layer; and the management method comprises energy metering management, energy performance management, energy analysis, energy monitoring, and energy data acquisition and processing. Real-time monitoring and comprehensive management of various energy media and key energy consuming equipment are realized by constructing the energy management system, production and use of various energy media and running conditions of various energy pipe networks and key energy consuming equipment can be timely learnt and mastered, scientific decision and accurate direction are realized, safe, reliable, economic and efficient operation is ensured, and the conversion from experiential to analytical scheduling function is realized.
Owner:无锡中粮工程科技有限公司
Electric energy balance monitoring system for transformer station
The invention can build a curve for monitoring electric energy balance in real time for each transformer station at a dispatch centre through an electric energy balance monitoring system provided with a main station system, a concentrator and an acquisition terminal. When electric energy metering equipment of the transformer station normally run, the electric energy balance curve is a relatively flat curve; and when the electric energy metering equipment on some circuit of the transformer station abnormally runs, the electric energy balance curve hops. Therefore, whether the electric energy metering equipment of the converting station abnormally runs or not can be accurately judged by monitoring the electric energy balance curve and the abnormity is disposed timely.
Owner:FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
Multiwavelet-based random non-linear load active energy metering method
InactiveCN102890190AAccurate measurementSolve measurement inaccuraciesPower measurement by current/voltageEnergy meteringHarmonic
The invention discloses a multiwavelet-based random non-linear load active energy metering method. The research on a novel multiwavelet-based random non-linear load active energy metering method is an issue with great theoretical significance and application value in the electrical energy metering field. The method comprises the following steps of: synchronously collecting voltage and current through a synchronous collecting circuit, decomposing the frequency bands of the voltage and the current by using a multi-wavelet decomposition algorithm, reconstructing fundamental wave, harmonic wave, flickering and impact voltage and current, metering fundamental wave, harmonic wave, flickering and impact active power through active energy metering of identical-frequency band, metering distortion active power generated by interaction of frequency signals through active energy metering of different frequency bands, and determining a random non-linear load source according to the directions of the harmonic wave active power, the flickering active power, the impact active power and the distortion active power so as to provide reference for active energy metering and management of random non-linear load. The multiwavelet-based random non-linear load active energy metering method provided by the invention is used for realizing random non-linear load active energy metering.
Owner:HARBIN UNIV OF SCI & TECH
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