CN106908723A - A kind of broadband power measuring system and method for high-voltage motor efficiency gauge check - Google Patents

A kind of broadband power measuring system and method for high-voltage motor efficiency gauge check Download PDF

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Publication number
CN106908723A
CN106908723A CN201710088561.5A CN201710088561A CN106908723A CN 106908723 A CN106908723 A CN 106908723A CN 201710088561 A CN201710088561 A CN 201710088561A CN 106908723 A CN106908723 A CN 106908723A
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CN
China
Prior art keywords
voltage
signal
current
broadband power
voltage signal
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CN201710088561.5A
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Chinese (zh)
Inventor
熊博
周峰
王铁街
殷小东
雷民
孙军
姜春阳
余也凤
张礼莉
刘卓
黄莹
肖莹
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WUHAN PANDIAN TECHNOLOGY Co Ltd
State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Wuhan Electric Power Technical College
Original Assignee
WUHAN PANDIAN TECHNOLOGY Co Ltd
State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Wuhan Electric Power Technical College
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Application filed by WUHAN PANDIAN TECHNOLOGY Co Ltd, State Grid Corp of China SGCC, China Electric Power Research Institute Co Ltd CEPRI, Wuhan Electric Power Technical College filed Critical WUHAN PANDIAN TECHNOLOGY Co Ltd
Priority to CN201710088561.5A priority Critical patent/CN106908723A/en
Publication of CN106908723A publication Critical patent/CN106908723A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34Testing dynamo-electric machines
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00Arrangements for measuring electric power or power factor
    • G01R21/133Arrangements for measuring electric power or power factor by using digital technique

Abstract

The invention discloses a kind of system for high-voltage motor efficiency gauge check, system includes broadband power sensor, broadband power analyzer and fiber optic communication unit;The voltage signal and current signal that broadband power sensor exports high-voltage motor are changed into low voltage signal, and low voltage signal and current signal are calculated, and obtain the numerical value of voltage signal and current signal;Broadband power sensor will be transmitted to broadband power analyzer by fiber optic communication unit by the low voltage signal of conversion;Broadband power analyzer carries out characteristic quantity computing by the low voltage signal for receiving, and obtains the power output of high-voltage motor.

Description

A kind of broadband power measuring system and method for high-voltage motor efficiency gauge check
Technical field
The present invention relates to high-voltage motor efficiency gauge check field, high-voltage motor efficiency to be used for more particularly, to one kind The broadband power measuring system and method for gauge check.
Background technology
High-voltage motor is indispensable equipment in large-scale heavy industry production application, and high-tension motor can be used to driving various Different machineries are used.Such as compressor, water pump, disintegrating machine, stock-removing machine, Transport Machinery and miscellaneous equipment, for mine, mechanic Prime mover use is done in the various industry such as industry, petrochemical industry, generator.Therefore, the power consumption of high-voltage motor accounts for industrial 60% or so of electricity, therefore the operational energy efficiency of high-voltage motor is improved, the internal loss for reducing high-voltage motor advocates environment at present Protection, is particularly important under the overall situation of energy-saving and emission-reduction.Carry out the metering third party's detection of high-voltage motor efficiency, produce electricity machine moral character Can upgrade, motor is remanufactured and poorly efficient motor eliminates aspect and all refers to efficiency measurement, the ordinary skill test side of electric efficiency Method, uncertainty evaluation and measuring system value traceability system cannot meet demand, especially measured in high-voltage motor efficiency and examined Survey third party's independent laboratory and be in blank stage, directly affect the test of high-voltage motor energy efficiency and every specific loss parameter Accurate metering, directly affect coherence check supervisory policy implement and energy-saving and emission-reduction work carry out.
Therefore the invention provides a kind of broadband power e measurement technology for high-voltage motor efficiency gauge check, to solve To the gauge check problem of high-voltage motor efficiency.
The content of the invention
Technical scheme provides a kind of broadband power measuring system for high-voltage motor efficiency gauge check, To solve the problems, such as the gauge check of current high-voltage motor efficiency.
It is described the invention provides a kind of system for high-voltage motor efficiency gauge check in order to solve the above problems System includes broadband power sensor, broadband power analyzer and fiber optic communication unit;
The voltage signal and current signal that the broadband power sensor exports high-voltage motor are changed into low voltage signal, And the low voltage signal and current signal are calculated, obtain the numerical value of the voltage signal and current signal;
The broadband power sensor is transmitted the low voltage signal by conversion by the fiber optic communication unit To the broadband power analyzer;
The broadband power analyzer carries out characteristic quantity computing by the low voltage signal to the reception, obtains high-tension electricity The power output of machine.
Preferably, the broadband power sensor includes first sensor branch road, second sensor branch road and broadband power Sensor main processor CPU,
The first sensor branch road include voltage signal transmitter, low pass filter, span-changing device, converter, Frequency measurement circuit, synchronisation source switch unit, the broadband power sensor branch road are used for the voltage letter for exporting high-voltage motor Number by being changed into low voltage signal after the voltage signal transmitter, the low pass filter, the low voltage signal are input into Exported to span-changing device by the low pass filter, the voltage signal by after conversion enters converter or input Frequency measurement circuit;
The second sensor branch road includes current signal transmitter, low pass filter, span-changing device, phase compensation list Unit, converter, frequency measurement circuit, synchronisation source switch unit, the broadband power sensor branch road are used for high-voltage motor , by being input into the low pass filter after the current signal transmitter, the current signal is by described for the current signal of output Low pass filter is exported to span-changing device, and the current signal enters converter or input by the phase compensation unit Frequency measurement circuit;
The voltage signal and current signal changed by the converter are input at the broadband power sensor main Reason device CPU;
The voltage signal exported by frequency measurement circuit and current signal believe voltage by synchronisation source switching Number and current signal switch to synchronous source signal, broadband power sensor main processor CPU described in the synchronisation source signal input.
Preferably, after the voltage signal, the current signal are input into the span-changing device, by the broadband power Sensor main processor CPU automatic or manuals carry out range swithching.
Preferably, the voltage signal exported by frequency measurement circuit and current signal pass through institute by synchronisation source State broadband power sensor main processor CPU automatic or manuals and switch over and voltage signal and current signal are switched into synchronization Source.
Preferably, the broadband power analyzer includes real-time communication controller FPGA, display unit and broadband power Analyzer primary processor CPU, the real-time communication controller FPGA receive the signal of the fiber optic communication unit transmission;
The broadband power analyzer primary processor CPU obtains signal by the real-time communication controller FPGA, and right The signal carries out direct computation of DFT page DFT and characteristic quantity computing.
Preferably, the real-time communication controller FPGA, can be with multiple fiber optic communication units by synchronous logic control Transmission signal, and reception capacity scope is set no more than 100KRAM cache signal data.
Preferably, the data by after the broadband power analyzer primary processor CPU computings, by display unit It has been shown that, the display data includes real effective rms, fundamental wave virtual value h01, the school of voltage and current of voltage and current Quasi-average value Mean, voltage and current arithmetic mean of instantaneous value avg1, the corresponding mean power avg2 of voltage and current, fundamental active work( Rate h001, the amplitude of 0~99 subharmonic and phase frequency domain character amount and real-time waveform.
Preferably, broadband power analyzer measurement pattern includes real effective rms, the fundamental wave virtual value of voltage and current H01, the calibration average value Mean of voltage and current, the arithmetic mean of instantaneous value avg1 of voltage and current;
If high-voltage motor is the alternating current generator of sinusoidal power supply, the measurement pattern is to include the real effective of voltage and current Rms, fundamental wave virtual value h01, the calibration average value Mean of voltage and current, tetra- kinds of moulds of arithmetic mean of instantaneous value avg1 of voltage and current Any one in formula;
If high-voltage motor is the alternating current generator of inverter supply, the voltage, electric current, fundamental signal use fundamental wave virtual value H01 patterns are measured.
Preferably, tested if the high-voltage motor carries out folded frequency, the voltage, electric current are very effective using voltage and current Value rms patterns are measured, and the power is surveyed using the arithmetic mean of instantaneous value avg1 patterns of fundamental wave, harmonic voltage and electric current Amount.
Based on another aspect of the present invention, the present invention provides a kind of method for high-voltage motor efficiency gauge check, institute The method of stating includes:
The voltage signal and current signal that high-voltage motor is exported are changed into low voltage signal;
The low voltage signal and current signal are calculated, the numerical value of the voltage signal and current signal is obtained;
The low voltage signal changed is passed through by described by the fiber optic communication unit by the broadband power sensor Transmit to the broadband power analyzer;
Characteristic quantity computing is carried out by the low voltage signal to the reception by the broadband power analyzer, obtains high The power output of Medium-voltage Motor.
Technical scheme provides a kind of broadband power measuring system for high-voltage motor efficiency gauge check, For the accuracy of parameter measurement in gauge check can be provided foundation by high-voltage motor, it is ensured that high-voltage motor energy efficiency of equipment is measured Validity.
Brief description of the drawings
By reference to the following drawings, illustrative embodiments of the invention can be more fully understood by:
Fig. 1 is to measure system according to a kind of broadband power for high-voltage motor efficiency gauge check of embodiment of the present invention System structure chart;And
Fig. 2 is to measure system according to a kind of broadband power for high-voltage motor efficiency gauge check of embodiment of the present invention The circuit interconnect pattern of system.
Specific embodiment
With reference now to accompanying drawing, illustrative embodiments of the invention are introduced, however, the present invention can use many different shapes Formula is implemented, and is not limited to embodiment described herein, there is provided these embodiments are to disclose at large and fully The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.For showing for being illustrated in the accompanying drawings Term in example property implementation method is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, is appreciated that and it The linguistic context of association area has consistent implication, and is not construed as Utopian or excessively formal meaning.
Fig. 1 is to measure system according to a kind of broadband power for high-voltage motor efficiency gauge check of embodiment of the present invention System structure chart.The present invention provides a kind of broadband power measuring system in high-voltage motor efficiency gauge check, improves high-tension electricity The accuracy of parameter in function effect gauge check, it is ensured that the validity of high-voltage motor efficiency metering.As shown in figure 1, system bag Include broadband power sensor, broadband power analyzer and fiber optic communication unit.Broadband power sensor exports high-voltage motor Voltage signal, current signal be changed into low voltage signal, and voltage signal, current signal calculated, obtain voltage letter Number, current signal numerical value.Broadband power sensor will be transmitted to broadband by fiber optic communication unit by the voltage signal of conversion Power analyzer.Broadband power analyzer carries out characteristic quantity computing by the signal for receiving, and obtains the output work of high-voltage motor Rate.The frequency that system proposed by the present invention is used to detect high-voltage motor output is the voltage x current and power under 0.1~200Hz Parameter, in embodiments of the present invention, high-voltage motor output voltage is 10KV, and electric current is 200A.
Preferably, broadband power sensor proposed by the present invention includes two connection branch roads, respectively first sensor branch Road and second sensor branch road.Voltage signal transmitter, the second sensing in system first sensor branch road proposed by the present invention The voltage of high-voltage motor output, current signal are converted to low voltage signal by the current signal transmitter in device branch road respectively. In first sensor branch road, the low voltage signal after conversion is processed by low pass filter, and low pass filter pre-sets The frequency of the harmonic wave that can pass through, in embodiments of the present invention, it is 0 that low pass filter pre-sets the harmonic wave frequency that can pass through To 99 times.Low voltage signal is by the way that after low pass filter, harmonic wave of the frequency higher than 99 will be eliminated, and the frequency is taken second place between 0 to 99 Between harmonic wave, can be by low pass filter.The setting purpose of low pass filter is to remove the noise in low voltage signal, is accomplished Eliminate the false and retain the true, reduce aliasing.The low voltage signal of low pass filter output, by span-changing device, 5 is amplified by low voltage signal Times into converter or enter frequency measurement unit afterwards to 10 times.Into the signal of converter, converter will be received Voltage, current analog signal be converted into the numeral of the binary form that broadband power sensor main processor CPU can be received Signal, and the data signal after conversion is input into broadband power sensor main processor CPU.It is low in first sensor branch road The low voltage signal of bandpass filter output, the signal of frequency measurement unit is entered by span-changing device, carries out frequency measurement, then Voltage, the switching of current signal synchronisation source are carried out, by the signal input broadband power sensor main processor CPU after synchronism switching. In second sensor branch road, the low voltage signal after conversion is processed by low pass filter, and low pass filter sets in advance The frequency of the harmonic wave that can pass through is put, in embodiments of the present invention, low pass filter pre-sets the harmonic wave frequency that can pass through It is 0 to 99 time.Low voltage signal is by the way that after low pass filter, harmonic wave of the frequency higher than 99 will be eliminated, and the frequency is between 0 to 99 time Between harmonic wave, can be by low pass filter.The setting purpose of low pass filter is to remove the noise in low voltage signal, is done To eliminating the false and retaining the true, aliasing is reduced.The low voltage signal of low pass filter output, by span-changing device, low voltage signal is put To phase compensation unit, the phase difference compensation that alternating current is produced is same-phase for big input.By phase in second sensor branch road Same-phase signal after the compensation of position, input is to converter or enters frequency measurement unit.Into the signal of converter, AD turns Voltage that parallel operation will be received, current analog signal are converted into two that broadband power sensor main processor CPU can receive and enter The data signal of form processed, and the data signal after conversion is input into broadband power sensor main processor CPU.Second sensing In device branch road, the low voltage signal of low pass filter output enters the signal of frequency measurement unit by span-changing device, carries out Frequency measurement, then voltage, the switching of current signal synchronisation source are carried out, by the signal input broadband power sensor main after synchronism switching Processor CPU.
Preferably, first sensor branch road and second sensor branch road concrete structure include:
First sensor branch road includes voltage signal transmitter, low pass filter, span-changing device, converter, frequency Measuring circuit, synchronisation source switch unit, broadband power sensor branch road are used for the voltage signal for exporting high-voltage motor by electricity Be changed into low voltage signal after pressure signal transmitting device, be input into low pass filter, low voltage signal by low pass filter export to Span-changing device, converter is entered or by frequency measurement circuit by the voltage signal after conversion.
Second sensor branch road include current signal transmitter, low pass filter, span-changing device, phase compensation unit, Converter, frequency measurement circuit, synchronisation source switch unit, broadband power sensor branch road are used for the electricity for exporting high-voltage motor Stream signal is input into low pass filter after overcurrent signal transmitter, and the current signal of device is defeated by low pass filter after filtering Go out to span-changing device, current signal enters converter or by frequency measurement circuit by phase compensation unit.
Preferably, voltage signal and current signal the input broadband power sensor main changed by converter are processed Device CPU.
Preferably, the voltage signal and current signal for being exported by frequency measurement circuit switch voltage by synchronisation source Signal and current signal switch to synchronous source signal, synchronisation source signal input broadband power sensor main processor CPU.
Preferably, after voltage signal, current signal input range converter, by broadband power sensor main processor CPU automatic or manuals carry out range swithching.
Preferably, the voltage signal and current signal for being exported by frequency measurement circuit pass through broadband work(by synchronisation source Rate sensor main processor CPU automatic or manuals are switched over and for voltage signal and current signal to switch to synchronisation source.
Synchronisation source is to realize voltage with electric current or the synchronized sampling of multiple passages.For same system, such as One three-phase or polyphase machine, the fundamental frequency of voltage and current is identical, therefore, only it is to be understood that a certain voltage or electricity The fundamental frequency of circulation road, and other voltages or current channel with the passage as reference.This passage, as synchronisation source.Such as The power analyzer of fruit triple channel gathers a voltage and current signal for three-phase, if without synchronisation source, calculating three phase electric power When will malfunction.In embodiment of the present invention, using synchronisation source, it is ensured that be three voltage x currents of passage of synchronization The power for calculating.
Preferably, after the signal that broadband power sensor main processor CPU will be received carries out calculating treatment, by number of results It is believed that number being exported to broadband power analyzer by fiber optic communication unit.The real-time communication controller FPGA of broadband power analyzer The consequential signal that fiber optic communication unit is transmitted is received by serial communication interface SCI, real-time communication controller FPGA is patrolled synchronously Collect under the control of controller, can be communicated with many fiber optic communication units.In order to ensure the real-time of high speed data transfer, Real-time communication controller FPGA is provided with the cache of Large Copacity, and sets reception capacity scope no more than 100KRAM at a high speed Buffered signal data.Using industrial Embedded Broad-band power analyzer primary processor CPU in broadband power analyzer.Broadband power Analyzer primary processor CPU receives data, broadband power analyzer primary processor CPU docking by real-time communication controller FPGA The data of receipts show that the real effective rms of voltage and current, fundamental wave have by discrete Fourier transform DFT by display unit Valid value h01, the calibration average value Mean of voltage and current, the arithmetic mean of instantaneous value avg1 of voltage and current, voltage and current correspondence Mean power avg2, fundamental active power h001, the amplitude of 0~99 subharmonic and phase frequency domain character amount and real-time waveform.
Preferably, broadband power analyzer structure includes real-time communication controller FPGA, display unit and broadband power Analyzer primary processor CPU, real-time communication controller FPGA receive the signal of fiber optic communication unit transmission.Broadband power analyzer Primary processor CPU obtains signal by real-time communication controller FPGA, and carries out direct computation of DFT transformation of page DFT and feature to signal Amount computing.
Preferably, broadband power analyzer measurement pattern includes real effective rms, the fundamental wave virtual value of voltage and current H01, the calibration average value Mean of voltage and current, the arithmetic mean of instantaneous value avg1 of voltage and current.If high-voltage motor is sinusoidal confession The alternating current generator of electricity, measurement pattern can be real effective rms, fundamental wave virtual value h01, the voltage and current for including voltage and current Calibration average value Mean, tetra- kinds of patterns of arithmetic mean of instantaneous value avg1 of voltage and current in any one.If high-voltage motor is to become The alternating current generator that frequency device is powered, voltage, electric current, fundamental signal are measured using fundamental wave virtual value h01 patterns.
Preferably, tested if high-voltage motor carries out folded frequency, voltage, electric current use the real effective rms moulds of voltage and current Formula is measured, and power is measured using the arithmetic mean of instantaneous value avg1 patterns of fundamental wave, harmonic voltage and electric current.
Fig. 2 is to measure system according to a kind of broadband power for high-voltage motor efficiency gauge check of embodiment of the present invention The circuit interconnect pattern of system.As shown in Fig. 2 broadband power analyzer measurement pattern includes real effective rms, the base of voltage and current Ripple virtual value h01, the calibration average value Mean of voltage and current, tetra- kinds of patterns of arithmetic mean of instantaneous value avg1 of voltage and current, if High-voltage motor is the alternating current generator of sinusoidal power supply, and measurement pattern can be that to include the real effective rms of voltage and current, fundamental wave effective Any in value h01, calibration average value Mean, tetra- kinds of patterns of arithmetic mean of instantaneous value avg1 of voltage and current of voltage and current Kind.If high-voltage motor is the alternating current generator of inverter supply, voltage, electric current, fundamental signal are entered using fundamental wave virtual value h01 patterns Row measurement.
Preferably, tested if high-voltage motor carries out folded frequency, voltage, electric current are using voltage or the real effective rms moulds of electric current Formula is measured, and power is measured using the average value avg1 patterns of fundamental wave, harmonic wave arithmetic voltage and current.
A, B, C refer to three-phase voltage in Fig. 2, and connection voltage sensor once holds A, B and current sensor once to hold P1, P2, Secondary terminals a, b of voltage sensor and S1, S2 of current sensor are all connected in broadband power sensor, broadband power sensing The voltage and current signal of receiving is carried out treatment calculating and is converted into data signal by voltage x current processing unit UI in device, by transmitting End T and receiving terminal R, by signal by Optical Fiber Transmission to broadband power analyzer, and the voltage electricity in broadband power analyzer Parsed and waveform analysis in stream power processing unit UIP, finally shown on broadband power analyzer.Wherein L, N are wide Power port with power sensor.
It is high the invention provides a kind of broadband power measuring method and system for high-voltage motor efficiency gauge check The accuracy of parameter measurement in Medium-voltage Motor efficiency gauge check provides foundation, it is ensured that it is effective that high voltage electric equipment efficiency is measured Property.
The present invention is described by reference to a small amount of implementation method.However, it is known in those skilled in the art, as What subsidiary Patent right requirement was limited, except the present invention other embodiments disclosed above equally fall of the invention In the range of.
Normally, all terms for using in the claims are all solved according to them in the usual implication of technical field Release, unless clearly defined in addition wherein.It is all of to be all opened ground with reference to " one/described/be somebody's turn to do [device, component etc.] " At least one of described device, component etc. example is construed to, unless otherwise expressly specified.Any method disclosed herein Step need not all be run with disclosed accurate order, unless explicitly stated otherwise.

Claims (10)

1. a kind of system for high-voltage motor efficiency gauge check, the system includes broadband power sensor, broadband power Analyzer and fiber optic communication unit;
The voltage signal and current signal that the broadband power sensor exports high-voltage motor are changed into low voltage signal, and right The low voltage signal and current signal are calculated, and obtain the numerical value of the voltage signal and current signal;
The broadband power sensor is transmitted to institute the low voltage signal by conversion by the fiber optic communication unit State broadband power analyzer;
The broadband power analyzer carries out characteristic quantity computing by the low voltage signal to the reception, obtains high-voltage motor Power output.
2. system according to claim 1, the broadband power sensor includes first sensor branch road, second sensor Branch road and broadband power sensor main processor CPU,
The first sensor branch road includes voltage signal transmitter, low pass filter, span-changing device, converter, frequency Measuring circuit, synchronisation source switch unit, the broadband power sensor branch road are used for the voltage signal warp for exporting high-voltage motor It is changed into low voltage signal after crossing the voltage signal transmitter, is input into the low pass filter, the low voltage signal passes through The low pass filter is exported to span-changing device, and the voltage signal by after conversion enters converter or incoming frequency Measuring circuit;
The second sensor branch road include current signal transmitter, low pass filter, span-changing device, phase compensation unit, Converter, frequency measurement circuit, synchronisation source switch unit, the broadband power sensor branch road are used to export high-voltage motor Current signal by being input into the low pass filter after the current signal transmitter, the current signal is by the low pass Wave filter is exported to span-changing device, and the current signal enters converter or incoming frequency by the phase compensation unit Measuring circuit;
The voltage signal and current signal changed by the converter are input into the broadband power sensor main processor CPU;
The voltage signal exported by frequency measurement circuit and current signal switch voltage signal by synchronisation source and Current signal switches to synchronous source signal, broadband power sensor main processor CPU described in the synchronisation source signal input.
3. system according to claim 2, after the voltage signal, the current signal are input into the span-changing device, Range swithching is carried out by the broadband power sensor main processor CPU automatic or manuals.
4. system according to claim 2, the voltage signal and current signal exported by frequency measurement circuit Switched over voltage signal and electric current by the broadband power sensor main processor CPU automatic or manuals by synchronisation source Signal switches to synchronisation source.
5. system according to claim 1, the broadband power analyzer includes real-time communication controller FPGA, and display is single Unit and broadband power analyzer primary processor CPU, the real-time communication controller FPGA receive the fiber optic communication unit biography Defeated signal;
The broadband power analyzer primary processor CPU obtains signal by the real-time communication controller FPGA, and to described Signal carries out direct computation of DFT page DFT and characteristic quantity computing.
6. system according to claim 5, the real-time communication controller FPGA by synchronous logic control, can with it is many Individual fiber optic communication unit transmission signal, and reception capacity scope is set no more than 100KRAM cache signal data.
7. system according to claim 5, the number by after the broadband power analyzer primary processor CPU computings According to, being shown by display unit, the display data includes real effective rms, the fundamental wave virtual value of voltage and current H01, the calibration average value Mean of voltage and current, voltage and current arithmetic mean of instantaneous value avg1, voltage and current are corresponding average Power avg2, fundamental active power h001, the amplitude of 0~99 subharmonic and phase frequency domain character amount and real-time waveform.
8. system according to claim 5, broadband power analyzer measurement pattern includes the real effective of voltage and current Rms, fundamental wave virtual value h01, the calibration average value Mean of voltage and current, the arithmetic mean of instantaneous value avg1 of voltage and current;
If high-voltage motor is the alternating current generator of sinusoidal power supply, the measurement pattern be include voltage and current real effective rms, In fundamental wave virtual value h01, calibration average value Mean, tetra- kinds of patterns of arithmetic mean of instantaneous value avg1 of voltage and current of voltage and current Any one;
If high-voltage motor is the alternating current generator of inverter supply, the voltage, electric current, fundamental signal use fundamental wave virtual value h01 Pattern is measured.
9. system according to claim 8, if the high-voltage motor carries out folded frequency testing, the voltage, electric current are using electricity The real effective rms patterns of pressure and electric current are measured, and the power uses the arithmetic mean of instantaneous value of fundamental wave, harmonic voltage and electric current Avg1 patterns are measured.
10. a kind of method for high-voltage motor efficiency gauge check, methods described includes:
The voltage signal and current signal that high-voltage motor is exported are changed into low voltage signal;
The low voltage signal and current signal are calculated, the numerical value of the voltage signal and current signal is obtained;
The low voltage signal by conversion is transmitted by the fiber optic communication unit by the broadband power sensor To the broadband power analyzer;
Characteristic quantity computing is carried out by the low voltage signal to the reception by the broadband power analyzer, high-tension electricity is obtained The power output of machine.
CN201710088561.5A 2017-02-17 2017-02-17 A kind of broadband power measuring system and method for high-voltage motor efficiency gauge check Pending CN106908723A (en)

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Application publication date: 20170630