CN205608171U - Digital electric energy measurement system's testing arrangement - Google Patents

Abstract

The embodiment of the utility model discloses digital electric energy measurement system's testing arrangement moves looks ware, voltage regulator and rises the working parameter who flows the ware through the regulation, simulates under the different load conditions output of primary current and voltage, it supplies multichannel electronic transformer check gauge and simulation standard electric energy meter to gather regard as the use of entire system standard source to utilize standard voltage transformer and standard current transformer to become the secondary current magnitude of voltage with primary current voltage conversion. Configuration message controller between PT merging cells and interval merging cells for digital signal transmission's between control figure galvanic current and the voltage temporal characteristic is used for the influence of the synchronism logarithmic word measurement system accuracy between test current and the voltage. And test the influence of the electronic transformer whole accuracy of measuring of logarithmic wordization and reliability under the different environment through disposing warm humidity tester and vibration testing appearance, and carry out operating mode emulation from a plurality of dimensions, improve accuracy and practicality.

Description

A kind of test device of digitalized electric energy metering system

Technical field

This utility model relates to power equipment technical field of measurement and test, particularly relates to the survey of a kind of digitalized electric energy metering system Electricity testing device.

Background technology

Along with digital technology and the development of Internet technology, increasing digital transformer substation puts into operation.Wherein, Digitalized electrical energy meter is development trend and the direction of following electric energy metrical, and the input of digitalized electrical energy meter is ethernet type Frame, calculates and obtains energy data, it and electronic mutual inductor and combining unit, collectively forms digitalized electric energy Metering system.

But, digitalized electrical energy meter is affected by factors such as processor word length, system clock, data communication, easily produces by mistake Difference；Electronic mutual inductor can be effectively improved transformer station and measure the accuracy of system, but stability and reliability is poor and mesh Before do not have perfect system to test and assess；And except described digitalized electrical energy meter, electronic mutual inductor error it Outward, the combining unit as one of front-end digital source has elementary error too.Therefore, for by digitalized electrical energy meter, The digitalized electric energy metering system that electronic mutual inductor and combining unit are constituted, error influence factor is complicated, how to institute State digitalized electric energy metering system accurately to test, and carry out error influence factor and Analysis on Mechanism, be art technology Personnel need badly and solve the technical problem that.

Utility model content

This utility model embodiment provides the test device of a kind of digitalized electric energy metering system, to solve in prior art Digitalized electric energy metering system poor accuracy, the problem of poor practicability.

In order to solve above-mentioned technical problem, this utility model embodiment discloses following technical scheme:

This utility model embodiment discloses the test device of a kind of digitalized electric energy metering system, including the first three-phase main-frequency Voltage source, the second three-phase main-frequency voltage source, phase shifter, pressure regulator, current lifting device, standard potential transformer, normalized current mutual inductance Device, inductive voltage divider, multi-channel electronic formula mutual-inductor tester, high-precision analog table, protocol converter, message controller, Temperature and humidity test instrument, vibration measurement instrument, wall switch and host computer, wherein:

First three-phase main-frequency voltage source electrically connects with the input of phase shifter, and the outfan of described phase shifter is mutual with normal voltage One end of sensor is connected；The other end of described standard potential transformer is by inductive voltage divider and multi-channel electronic formula mutual inductance Device tester is connected；

Second three-phase main-frequency voltage source is electrically connected with standard current transformer by pressure regulator and current lifting device, described standard electric Current transformer is connected with described multi-channel electronic formula mutual-inductor tester；

Described standard potential transformer and described standard current transformer the most all electrically connect with high-precision analog table；Described high-precision Degree simulation table is connected with protocol converter；

Described digitalized electric energy metering system includes electronic type voltage transformer to be measured, electronic current mutual inductor to be measured, PT Combining unit, interval combining unit, process layer switch and digitalized electrical energy meter to be measured；Described electronic type voltage to be measured One end of transformer was connected with the described phase shifter, the other end is connected with described PT combining unit；Described message controller It is arranged between described PT combining unit and described interval combining unit and closes with described PT combining unit and described interval And unit is all connected；Described interval combining unit is connected with digitalized electrical energy meter to be measured by process layer switch；Institute State digitalized electrical energy meter to be measured to be connected with host computer by wall switch；

Described multi-channel electronic formula mutual-inductor tester, described protocol converter all by described wall switch with upper Machine is connected；Described temperature and humidity test instrument and described vibration measurement instrument are arranged at electronic type voltage transformer to be measured and/or to be measured Electronic current mutual inductor relevant position is also connected with host computer.

Preferably, the described phase shifter includes 3 voltage phase output terminals, and described voltage phase output terminal is mutual with normal voltage respectively Sensor and electronic type voltage transformer to be measured are connected.

Preferably, described test device includes 3 groups of pressure regulators and current lifting device；Described second three-phase main-frequency voltage source and often group Pressure regulator is connected, often organize described current lifting device respectively with corresponding standard current transformer and electronic current mutual inductance to be measured Device is connected.

Preferably, described message controller is by IEC61850-9-2 stipulations and described PT combining unit and described interval Combining unit is connected, communicates.

Preferably, described electronic current mutual inductor to be measured includes optical electron formula current transformer to be measured, described electricity to be measured Minor voltage transformer includes optical electron formula voltage transformer to be measured；Described temperature and humidity test instrument and described vibration-testing Instrument is arranged at optical electron formula current transformer to be measured and/or optical electron formula voltage transformer relevant position to be measured, and described Temperature and humidity test instrument and described vibration measurement instrument are connected with host computer by serial communication port.

From above technical scheme, the test device of the digitalized electric energy metering system that this utility model embodiment provides, profit With 380V civil power as unified power supply input, configuration up-flow increasing apparatus, use three identical sources up-flow boostings, utilize and move Phase device controls the power-factor angle between three-phase current and voltage thus generates the system primary current voltage that can arbitrarily control Value, primary current and the output of voltage in the case of simulation different loads.Utilize CT mark mutually and PT mark is mutually by primary current Voltage is converted into secondary current magnitude of voltage and is acquired for multi-channel electronic formula mutual-inductor tester and mock standard electric energy meter And upper computer analyzing software will be delivered to complete mock standard signal and standard on these signals and the electric flux that calculates The collection of electric flux, uses as whole system standard source.Build optics and electricity electronic mutual inductor respectively and merge single Unit also configures the digitalized electrical energy meter of correspondence as tested platform, configuration report between PT combining unit and interval combining unit Literary composition controller, in order between digital control electric current and voltage digital signal transmit time response be used for test electric current with The synchronicity that voltage is only the shown in impact on digitized metering system accuracy.Electronic mutual inductor is allowed to be operated in humiture respectively Case and vibration upper configuration temperature and humidity test instrument and vibration measurement instrument affect in varying environment in order to test electronic mutual inductor Under on the digitized entirety accuracy of measuring and the impact of reliability.By configuration specification transducer, process layer switch with And wall switch realizes, and whole system stipulations are unified and protocol data exchanges.Host computer gathers multi-channel electronic formula mutual inductance The current/voltage analog quantity standard signal sent on device tester, gathers optics and electricity merging unit of electronic transformer respectively The current/voltage digital signal of the IEC61850-9-2 agreement of output, gathers the electric flux of mock standard electric energy meter output simultaneously Value and the electric energy value of the optics digitalized electrical energy meter corresponding with electricity electronic mutual inductor, host computer passes through serial communication Interface gathers humiture, the value of vibrating sensor.Upper computer software is born in difference by being analyzed above-mentioned variable testing When carrying characteristic, different operating mode, different time characteristic, whole the digitized measurement system and electronic mutual inductor is whole Body accuracy.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will to embodiment or In description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, for ordinary skill people For Yuan, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The structural representation of the test device of a kind of digitalized electric energy metering system that Fig. 1 provides for this utility model embodiment Figure；

The structural representation of the test device of the another kind of digitalized electric energy metering system that Fig. 2 provides for this utility model embodiment Figure；

The flow process signal of the method for testing of a kind of digitalized electric energy metering system that Fig. 3 provides for this utility model embodiment Figure；

The schematic flow sheet of a kind of test parameter extracting method that Fig. 4 provides for this utility model embodiment；

The schematic flow sheet of the another kind of test parameter extracting method that Fig. 5 provides for this utility model embodiment；

The flow process signal of the method for testing of the another kind of digitalized electric energy metering system that Fig. 6 provides for this utility model embodiment Figure；

The symbol table of Fig. 1-2 is shown as:

1-the first three-phase main-frequency voltage source, 2-the second three-phase main-frequency voltage source, the 3-phase shifter, 4-pressure regulator, 5-current lifting device, 6-standard potential transformer, 7-standard current transformer, 8-inductive voltage divider, 9-multi-channel electronic formula mutual-inductor tester, 10-high-precision analog table, 11-protocol converter, 12-message controller, 13-temperature and humidity test instrument, 14-vibration measurement instrument, 15-wall switch, 16-host computer, 17-electronic type voltage transformer to be measured, 18-treats that electrometrics electronic current is mutual Sensor, 19-optical electron to be measured formula current transformer, 20-PT combining unit, 21-is spaced combining unit, 22-process layer Switch, 23-digitalized electrical energy meter to be measured.

Detailed description of the invention

For the technical scheme making those skilled in the art be more fully understood that in this utility model, below in conjunction with this practicality Accompanying drawing in new embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that Described embodiment is only a part of embodiment of this utility model rather than whole embodiments.New based on this practicality Embodiment in type, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise Execute example, all should belong to the scope of this utility model protection.

See Fig. 1, for the structure testing device of a kind of digitalized electric energy metering system that this utility model embodiment provides Schematic diagram, described test device includes first three-phase main-frequency voltage source the 1, second three-phase main-frequency voltage source 2, phase shifter 3, adjusts Depressor 4, current lifting device 5, standard potential transformer 6, standard current transformer 7, inductive voltage divider 8, multi-channel electronic formula are mutual Sensor tester 9, high-precision analog table 10, protocol converter 11, message controller 12, temperature and humidity test instrument 13, vibration Tester 14, wall switch 15 and host computer 16.

Wherein, described first three-phase main-frequency voltage source 1 electrically connects with the input of phase shifter 3, described phase shifter 3 another One end is connected with one end of standard potential transformer 6；The other end of described standard potential transformer 6 is by sensing dividing potential drop Device 8 is connected with multi-channel electronic formula mutual-inductor tester 9.The phase adjusted granularity of described phase shifter 3 is 0.1 degree, Range of accommodation 0-360 degree, and 380V/110kV split-phase is adjustable.Described standard potential transformer 6 uses 110kV/100V, Accuracy class is the standard potential transformer of 0.01%.

Described second three-phase main-frequency voltage source 2 is electrically connected with standard current transformer 7 by pressure regulator 4 and current lifting device 5, Described standard current transformer 7 is connected with described multi-channel electronic formula mutual-inductor tester 9.Wherein, described pressure regulator 4 coordinate current lifting device 5 to export 200-1000A electric current, and described standard current transformer 7 selects 1000A/5A, accuracy class The standard current transformer of 0.01%.

Described standard potential transformer 6 and described standard current transformer 7 also all electrically connect with high-precision analog table 10； Described high-precision analog table 10 gathers the output voltage of standard potential transformer 6 and the output electricity of standard current transformer 7 Flow, and the data mode transmission specified with 645 communication protocols is connected to protocol converter 11；Described protocol converter 645 communication protocol data are converted to 61850 communication protocol data by 11.

Described multi-channel electronic formula mutual-inductor tester 9 and described protocol converter 11 all by wall switch 15 with Host computer 16 is connected.The electricity of standard potential transformer 6 that described multi-channel electronic formula mutual-inductor tester 9 will collect The current transformer normal data of pressure transformer normal data and standard current transformer 7 sends to host computer 16, described rule About transducer 11 will send to host computer 16 after the ammeter normal data format transformation of high-precision analog table 10.At tool When body is implemented, described multi-channel electronic formula mutual-inductor tester 9 selects 7 half boards of multichannel of NI company to realize high-precision Degree grade, analog loopback sampling precision is 0.05%；Described high-precision analog table uses 100V, 5A input, diligent electric energy Measuring accuracy is 0.02%.

Described digitalized electric energy metering system include electronic type voltage transformer 17 to be measured, electronic current mutual inductor to be measured, PT combining unit 20, interval combining unit 21, process layer switch 22 and digitalized electrical energy meter to be measured 23；Described treat The one end surveying electronic type voltage transformer 17 was connected with the described phase shifter 3, the other end and described PT combining unit 20 It is connected；Described message controller 12 is arranged between described PT combining unit 20 and described interval combining unit 21, And be all connected with described PT combining unit 20 and described interval combining unit 21；Described interval combining unit 21 is passed through Process layer switch 22 is connected with digitalized electrical energy meter 23 to be measured；Described digitalized electrical energy meter to be measured 23 is by between described Interlayer switch 15 is connected with host computer 16.In the specific implementation, technical staff can be according to research and test needs Building described digitalized electric energy metering system, described electronic type voltage transformer 17 to be measured, described electronic current to be measured are mutual Sensor, described PT combining unit 20, described interval combining unit 21, described process layer switch 22 and described to be measured The number of digitalized electrical energy meter 23 does not limits.

In this utility model embodiment, described digitalized electric energy metering system includes 1 electronic type voltage transformer to be measured Treat electrometrics electronic current mutual inductor 18,1 19,2 messages of optical electron formula current transformer to be measured for 17,1 Controller, 2 interval combining units, 1 process layer switch and 2 digitalized electrical energy meters to be measured；Wherein, described Electronic type voltage transformer 17 to be measured can be electricity electronic type voltage transformer or optical electron formula voltage transformer, for Electrical voltage transformer can select principle of capacitive divider or the voltage transformer of inductance voltage divider principle, and rated primary voltage is 110kV, the output of double harvesters is also connected respectively at described 2 PT combining units；Described electronic current to be measured is mutual Sensor includes treating electrometrics electronic current mutual inductor 18 and optical electron formula current transformer 19 to be measured, described electricity to be measured The one end learning electronic current mutual inductor 18 is connected with the outfan of current lifting device 5, the other end and one are spaced combining unit 21 are connected, and one end of described optical electron formula current transformer 19 to be measured is connected with current lifting device 5 equally, the other end And another interval combining unit 21 is connected；Wherein, treat described in that electrometrics electronic current mutual inductor 18 selects Roche Coil+LPCT principles electronic formula transformer, rated primary current is 600A, and accuracy class is 0.2；Described treat photometry Electronic current mutual inductor 19 uses all-fiber principles electronic formula current transformer, and rated primary current is 600A, precision Grade is 0.2S.Combining unit is according to interval configuration, between PT combining unit 20 and interval combining unit 21 respectively Message controller 12 is set, realizes digital data transmission control, described message controller by described message controller 12 12 inputs are consistent with outgoing message, and only control message exports the parameters relevant to network characteristic such as time delay, shake, frame losing； The voltage transformer of the voltage transformer to be measured collected and current transformer to be measured is tested by described interval combining unit 21 Data summation current transformer test data send to process layer switch 22, described process layer with IEC61850-9-2 stipulations Above-mentioned test data are respectively sent to 2 described digitalized electrical energy meters 23 to be measured by switch 22 further；Described to be measured Digitalized electrical energy meter test result is sent to host computer 16, simultaneously by digitalized electrical energy meter 23 by wall switch 15 Described voltage transformer test data and described current transformer test data are passed through described interval by process layer switch 22 Layer switch 15 sends to host computer 16.In the specific implementation, described process layer switch 22 all uses optical fiber interface, Described wall switch 15 uses electricity Ethernet interface, and digitalized electrical energy meter directly uses Ethernet will to deliver on electric flux Host computer.It addition, described high-precision analog table 10 and described digitalized electrical energy meter to be measured 23 are provided with pulse output end Mouthful, can other detection equipment such as oscillographs external etc. the measuring accuracy of described digitalized electrical energy meter 23 to be measured be examined Survey.

Described temperature and humidity test instrument 13 and described vibration measurement instrument 14 be arranged at electronic mutual inductor relevant position to be measured and It is connected with host computer 16.Described temperature and humidity test 13 arranges corresponding test temperature and testing humidity, simulates electricity to be measured Minor transformer actual working environment, and by the temperature data collected and humidity data by serial communication interface send to Host computer 16；Described vibration-testing 14 arranges corresponding test vibration frequency and Oscillation Amplitude etc., simulates electronic type to be measured Transformer real work Vibration Condition, and the vibration data collected is sent to host computer 16 by serial communication interface.

In actual test process, described standard potential transformer 6 is by the voltage after mutual inductance, as voltage transformer standard Data are by the dividing potential drop of inductive voltage divider 8, the collection of multi-channel electronic formula mutual-inductor tester 9 and wall switch The forwarding of 15, sends to host computer 16；Described current transformer 7 is by the electric current after mutual inductance, as current transformer standard Data pass through collection and the forwarding of wall switch of multi-channel electronic formula mutual-inductor tester 9, send to host computer 16； Meanwhile, the voltage after the mutual inductance of described standard potential transformer 6 and the input of the electric current after described standard current transformer 7 mutual inductance To high-precision analog table 10, described high-precision analog table 10 uses the output of DL/T645 stipulations after measuring, by rule About transducer 11 be converted into the agreement of IEC61850MMS agreement electric energy meter normal data is sent to wall switch 15, And eventually arrive at host computer 16.In terms of digitalized electric energy metering system, voltage transformer to be measured and PT combining unit, And according to producer's proprietary protocol transmission data between current transformer to be measured and interval combining unit, interval combining unit will The voltage transformer test data summation current transformer test data collected send to process layer switch 22, described process Above-mentioned test data are sent to digitalized electrical energy meter 23 to be measured by layer switch 22 further, and are exchanged by wall Machine 15 sends to host computer 16；Digitalized electrical energy meter 23 to be measured generates electric energy meter test data, and is surveyed by described electric energy meter Examination data are sent to host computer 16 by wall switch 15；Temperature and humidity test instrument 13 and vibration measurement instrument 14 gather Temperature data, humidity data and vibration data also send to host computer 16.Collecting of the complete paired data of host computer 16, According to time dimension, test the accuracy of every electronic mutual inductor on each timing node, whole the digitized measurement system The accuracy of system, tests the environmental information such as humiture, vibration simultaneously, detects the abnormal information applied due to message controller, The all information of summary carries out information and collects, and tests the digitized measurement system power metering accuracy, by whole system digits Electric energy metering error, as triggering signal, records this moment electronic mutual inductor when whole system power error in dipping more line Error, power factor, environment factor, frame losing and the index such as the bit error rate, synchronicity, thus draw and affect under different operating mode The factor of the digitized measurement system entirety metering accuracy, effectively and accurately tests digitalized electric energy metering system And assessment.

As seen from the above-described embodiment, the test device of the digitalized electric energy metering system that this utility model embodiment provides, profit With 380V civil power as unified power supply input, configuration up-flow increasing apparatus, use three identical sources up-flow boostings, utilize and move Phase device controls the power-factor angle between three-phase current and voltage thus generates the system primary current voltage that can arbitrarily control Value, primary current and the output of voltage in the case of simulation different loads.Utilize standard current transformer and normal voltage mutual Primary current voltage is converted into secondary current magnitude of voltage for multi-channel electronic formula mutual-inductor tester and mock standard by sensor Electric energy meter is acquired and will deliver to upper computer analyzing software on these signals and the electric flux that calculates to complete simulation mark Calibration signal and the collection of standard electric energy, use as whole system standard source.Build optics and electricity electronic type respectively Transformer and combining unit also configure the digitalized electrical energy meter of correspondence as tested platform, merge with being spaced in PT combining unit Configuration message controller between unit, the time response transmitted in order to the digital signal between digital control electric current and voltage It is used for testing the impact on digitized metering system accuracy of synchronicity that electric current and voltage is only shown in.Allow electronic type mutual inductance respectively Device is operated in humiture case and vibration upper configuration temperature and humidity test instrument and vibration measurement instrument in order to test electronic mutual inductor On the digitized entirety accuracy of measuring and the impact of reliability under the influence of varying environment.By configuration specification transducer, Process layer switch and wall switch realize the unification of whole system stipulations and protocol data exchange.Host computer gathers many The current/voltage analog quantity standard signal sent on channel electron formula mutual-inductor tester, gathers optics and electricity electronic type respectively The current/voltage digital signal of the IEC61850-9-2 agreement of transformer combining unit output, gathers mock standard electric energy simultaneously The electric energy value of table output and the electric energy value of the optics digitalized electrical energy meter corresponding with electricity electronic mutual inductor, upper Machine gathers humiture, the value of vibrating sensor by serial communication interface.Upper computer software is by carrying out above-mentioned variable point Analysis test is whole the digitized measurement system and electricity when different loads characteristic, different operating mode, different time characteristic The overall accuracy of minor transformer.

Embodiment two

See Fig. 2, for the knot testing device of the another kind of digitalized electric energy metering system that this utility model embodiment provides Structure schematic diagram, this utility model embodiment is with the difference of embodiment one, and the described phase shifter 3 uses three-phase integrated Phase shifter, the most described phase shifter 3 includes 3 voltage phase output terminals, and the described phase shifter 3 will be from the first three-phase main-frequency The voltage of voltage source is divided into voltage A phase, voltage B phase and voltage C phase and is exported by voltage phase output terminal respectively；Described Voltage phase output terminal is connected with standard potential transformer, standard current transformer and voltage transformer to be measured respectively.Institute State test device and also include that 3 groups of pressure regulators and current lifting device, described second three-phase main-frequency voltage source are connected with often group pressure regulator, Often organize described current lifting device chalk to be connected with corresponding standard current transformer and current transformer to be measured；Often group pressure regulator and Current lifting device is mutually matched, and completes boosting up-flow, and correspondence output electric current A phase, electric current B phase and electric current C phase respectively.? In this utility model embodiment, described test device includes 3 standard potential transformers and 3 standard current transformers； Described digitalized electric energy metering system include 3 voltage transformers to be measured, 3 treat electrometrics current transformer and 3 treat Photometry current transformer；Described 3 standard potential transformers are respectively connecting to voltage A phase, voltage B phase and voltage C The voltage phase output terminal of corresponding pressure regulation；Described 3 standard current transformers are respectively connecting to electric current A phase, electric current B The current lifting device outfan the most corresponding with electric current C；And, described 3 standard potential transformers and described 3 standard electric Voltage transformer normal data summation current transformer normal data is respectively sent to multi-channel electronic formula transformer by current transformer Tester and high-precision analog table；Described 3 voltage transformers to be measured the most respectively with voltage A phase, voltage B phase and voltage The voltage phase output terminal of the pressure regulation that C is corresponding is connected, and voltage transformer is tested data transmission to PT combining unit； Described 3 current lifting device outputs treating that electrometrics current transformer is corresponding with electric current A phase, electric current B phase and electric current C respectively End is connected, and current transformer is tested data transmission to an interval combining unit, described 3 optical currents to be measured Corresponding with electric current A phase, electric current B phase and the electric current C the most respectively current lifting device outfan of transformer is connected, and will Current transformer test data send and are spaced combining unit to another.Described temperature and humidity test instrument 13 and described vibration-testing Instrument 14 is arranged at optical current mutual inductor position to be measured, with the influence degree for described optical current mutual inductor to be measured Test.This utility model embodiment and embodiment one something in common, can not repeat them here referring to embodiment one.

By increasing the pressure regulator voltage output number of phases, and pressure regulator combines increase electric current with the coupling of booster and exports phase mutually Number, the test device of the digitalized electric energy metering system in this utility model embodiment, technical staff can be according to test need To build the higher digitalized electric energy metering system of complexity flexibly, and complicated digitalized electric energy metering system is surveyed Examination and assessment, the actual interconnection situation of the digitalized electric energy metering system of the real work that more coincide, improves described further The test motility of test device and practicality.

It should be noted that above-mentioned test device embodiment is only section Example, technical staff in actual test process Can arrange the described phase shifter exports any number of voltages such as 2 etc. mutually, can arrange simultaneously any number of pressure regulator and Current lifting device group is equal to export any number of electric current；And according to the electronic mutual inductor in digitalized electric energy metering system Number set the standard potential transformer of respective number and standard current transformer.

Corresponding with the test device embodiment of the digitalized electric energy metering system that this utility model provides, this utility model is also Provide the method for testing of a kind of digitalized electric energy metering system.

See Fig. 3, for the method for testing of a kind of digitalized electric energy metering system that this utility model embodiment provides, this survey Method for testing comprises the following steps:

Step S101: extract test parameter from the operational data of digitalized electric energy metering system, according to described test parameter Set phase shifter, pressure regulator, current lifting device, message controller, temperature and humidity test instrument and the running parameter of vibration measurement instrument.

Described operational data can be understood as recording what described digitalized electric energy metering system recorded in practical work process The daily record of work etc. of daily record of work, such as digital transformer substation, helps technical staff to record described digitalized electric energy and measures system The real work situation of system such as can be convenient in generation event with data such as writing task voltage, operating current, operating frequencies Analyzing failure cause during barrier.Test parameter is extracted, owing to described test parameter is from real work from described operational data Data closest to real operating environments, therefore according to the phase shifter in described test parameter configuration testing device, pressure regulator, Current lifting device, temperature and humidity test instrument and the running parameter of vibration measurement instrument, it is possible to effectively reduce working site, improve numeral The accuracy of electric energy metering system test.

See Fig. 4, the schematic flow sheet of a kind of test parameter extracting method provided for this utility model embodiment, described Extracting method comprises the following steps:

Step S1011: compare the voltage data in operational data and current data.

The running voltage data of the described digitalized electric energy metering system in traversal operational data and current data, be respectively compared Described voltage data and the size of described current data.

Step S1012: extract voltage extremity and current limit as described test parameter.

According to the comparative result of step S1011, therefrom extract voltage extremity, including voltage max and voltage minimum, And include the current limit of current maxima and current minimum；Using described voltage extremity and described current limit as survey Examination parameter.

After determining described voltage extremity and described current limit by above-mentioned two step, may thereby determine that described number The test voltage of word electric energy metering system and test current range, and thus calculate measured power scope.According to upper State the parameters such as test parameter, the boost value of adjustment phase shifter and phase angle, adjust size and the power of phase shifter output voltage Factor；And according to described test parameter, adjust by pressure regulator and the running parameter of current lifting device, adjust current lifting device output electricity The size of stream, thus described digitalized electric energy metering system is tested.

See Fig. 5, for the schematic flow sheet of the another kind of test parameter extracting method that this utility model embodiment provides, institute State test parameter extracting method to comprise the following steps:

Step S1013: compare the voltage waveform in operational data and current waveform.

Described operational data there are discrete voltage and current data according to sequence of event, are used for describing voltage waveform and electricity Stream waveform, owing to voltage waveform and current waveform have periodic feature, therefore can cut with the time period of fixed cycle Take multiple time period voltage waveform and time period current waveform；Voltage data between comparison each time period voltage waveform is poor Value, and the current data difference between comparison each time period current waveform.

Step S1014: add up same form voltage waveform and the occurrence number of current waveform respectively.

The described voltage data difference calculated by step S1013 and described current data difference, it is judged that described voltage wave Whether shape and described current waveform are same form waveform；The most in the specific implementation, if described voltage data difference is more than One disparity threshold, then judge that described time period voltage waveform is different, otherwise, then it is assumed that identical；If same described electric current Data difference is more than a disparity threshold, then judge that described time period current waveform is different, otherwise, then it is assumed that identical.Respectively The voltage waveform of statistics same modality and the occurrence number of voltage waveform.

Step S1015: extract the most voltage waveform of occurrence number and current waveform as described test parameter.

According to the statistical result of step S1014, extract the most voltage waveform of occurrence number and current waveform as described survey Examination parameter.

The test parameter determined according to step S1013 to step S1015, adjusts the phase shifter in test device, pressure regulator And the running parameter of current lifting device so that the voltage exported through the described phase shifter is combined above-mentioned voltage waveform, through described pressure regulation The electric current of device and the output of described current lifting device is combined above-mentioned current waveform, it is ensured that test environment with the metering of described digitalized electric energy is The actual working environment of system is consistent, and then improves the measuring accuracy of described digitalized electric energy metering system.

Step S102: judge whether digitalized electrical energy meter to be measured error in dipping occurs.

In host computer, by com-parison and analysis from the electric energy meter normal data of high-precision analog table, and from number to be measured The electric energy meter test data of word electric energy meter, such that it is able to judge whether digitalized electrical energy meter to be measured error in dipping occurs.

Step S103: if error in dipping occurs in digitalized electrical energy meter to be measured, records described digitalized electrical energy meter to be measured and occurs The meter factor in error in dipping moment, described meter factor include electronic mutual inductor error, power factor, environment factor, The frame losing bit error rate.

Error in dipping occurs as triggering signal using digitalized electrical energy meter to be measured, when digitalized electrical energy meter to be measured occurs that metering is by mistake During difference, the meter factor of record current time, described meter factor can be understood as Contemporary Digital electric energy metering system Test environment, including electronic mutual inductor error, power factor, environment factor and the frame losing bit error rate；Wherein said electricity Minor transformer error, describing voltage transformer error to be measured and current transformer to be measured in the digitized measurement system may carry The error come；Described power factor, records the power factor of the digitized measurement system input described in current time；Described ring Border factor, including the temperature in the test environment of electronic mutual inductor, humidity, frequency of vibration and vibration amplitude etc., warm and humid Temperature and humidity in degree tester collecting test environment, the frequency of vibration in vibration measurement instrument collecting test environment and vibration Amplitude；The described frame losing bit error rate, describes the network state of described the digitized measurement system, in described the digitized measurement system Electronic mutual inductor, combining unit and digitalized electrical energy meter to be measured interconnected by process layer switch and to meet communication The form of the message data frame of stipulations communicates, and the measuring accuracy of digitized metering system can be produced by network state therein Raw impact, the described frame losing bit error rate is controlled with simulation based on digital metering system when real work by message controller The heterogeneous networks unusual condition that may experience.By meter factor record, concrete form in this utility model embodiment not Limit, such as can be to be organized into the form of data base, by statistical analysis, calculate and affect digitized meter under different operating mode The factor of the overall metering accuracy of amount, thus qualitative, quantitative research the digitized measurement entirety metering accuracy influence factor is carried For data basis.

Owing to the metering accuracy of digitalized electric energy metering system is not only determined by system entirety, in order to the composition in system Parts carry out a point link analysis, this utility model embodiment test based on described digitalized electric energy metering system device, On the basis of method of testing shown in Fig. 3, see Fig. 6, the another kind of digitalized electric energy provided for this utility model embodiment The method of testing of metering system, the method is further comprising the steps of:

Step S104: from electronic mutual inductor error, it may be judged whether electronic mutual inductor trueness error occurs.

By voltage transformer test data and current transformer test data in host computer, voltage can be calculated Transformer and the ratio error of current transformer and phase error, by respectively with standard potential transformer and normalized current The ratio error of transformer and phase error, contrast judges that the electronic mutual inductor in described digitalized electric energy metering system is No there is trueness error.In the specific implementation, such as voltage transformer, if the ratio of voltage transformer to be measured is by mistake Difference and phase error change, and intensity of variation is more than a threshold value, then judge that error occurs in voltage transformer precision to be measured.

Step S105: if electronic mutual inductor occurs that the electricity of electronic mutual inductor trueness error occur in trueness error, record Minor transformer type and the power factor corresponding with the electronic mutual inductor that trueness error occurs, environment factor, The frame losing bit error rate.

By the judgement of step S104, there is trueness error in the electronic mutual inductor in digitalized electric energy metering system, and The trueness error of electronic mutual inductor is probably the principal element causing whole metering system error in dipping, it is therefore desirable to electricity Minor transformer link is analyzed.Specifically, there is the electronic mutual inductor class of electronic mutual inductor trueness error in record Type and the power factor corresponding with the electronic mutual inductor that trueness error occurs, environment factor, the frame losing bit error rate； Wherein said corresponding power factor, environment factor and the frame losing bit error rate are it can be understood as trueness error occurs in input The power factor of electronic mutual inductor, the test environment temperature of the electronic mutual inductor of trueness error, humidity, vibration occur Frequency and vibration amplitude, and the message that the combining unit that is connected to of described electronic mutual inductor trueness error occur is corresponding The controller frame losing bit error rate.By power factor, environment factor and the frame losing bit error rate are collected, analyze and cause electronics The reason of formula transformer trueness error.

Step S106: if trueness error does not occurs in electronic mutual inductor, cross adjustment message controller running parameter, it is judged that Whether Network Abnormal causes described digitalized electric energy metering system error.

If trueness error does not occurs in electronic mutual inductor, the network connecting link of digitalized electric energy metering system can be entered Row is analyzed；The most in the specific implementation, can adjust the running parameter of message controller, controlling message controller will progressively Return to normal network conditions etc., after judging that network state is normal, the error in dipping of described digitalized electric energy metering system The most still exist, if it does, the detection of other links such as combining unit may be also needed to carry out；If metering is by mistake Difference fades away, then judge it is to be caused error in dipping by Network Abnormal.By analyzing the web influence factors such as the frame losing bit error rate, Analyze the mechanism etc. causing described metering system error in dipping.

It should be noted that in this article, such as term " includes ", " comprising " or its any other variant are intended to Contain comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include Those key elements, but also include other key elements being not expressly set out, or also include for this process, method, thing Product or the intrinsic key element of equipment.In the case of there is no more restriction, statement " including ... " limit Key element, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.

The above is only detailed description of the invention of the present utility model, makes to skilled artisans appreciate that or realize this reality With novel.Multiple amendment to these embodiments will be apparent to one skilled in the art, herein institute The General Principle of definition can realize in the case of without departing from spirit or scope of the present utility model in other embodiments. Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to disclosed herein Principle and the consistent the widest scope of features of novelty.

Claims (5)

1. the test device of a digitalized electric energy metering system, it is characterised in that include the first three-phase main-frequency voltage source (1), Second three-phase main-frequency voltage source (2), the phase shifter (3), pressure regulator (4), current lifting device (5), standard potential transformer (6), Standard current transformer (7), inductive voltage divider (8), multi-channel electronic formula mutual-inductor tester (9), high-precision analog table (10), Protocol converter (11), message controller (12), temperature and humidity test instrument (13), vibration measurement instrument (14), wall exchange Machine (15) and host computer (16), wherein:

First three-phase main-frequency voltage source (1) electrically connects with the input of phase shifter (3), the output of described phase shifter (3) End is connected with one end of standard potential transformer (6)；The other end of described standard potential transformer (6) is by sensing Potentiometer (8) is connected with multi-channel electronic formula mutual-inductor tester (9)；

Second three-phase main-frequency voltage source (2) is by pressure regulator (4) and current lifting device (5) and standard current transformer (7) Electrical connection, described standard current transformer (7) is connected with described multi-channel electronic formula mutual-inductor tester (9)；

Described standard potential transformer (6) and described standard current transformer (7) the most all with high-precision analog table (10) Electrical connection；Described high-precision analog table (10) is connected with protocol converter (11)；

Described digitalized electric energy metering system include electronic type voltage transformer to be measured (17), electronic current mutual inductor to be measured, PT combining unit (20), interval combining unit (21), process layer switch (22) and digitalized electrical energy meter to be measured (23)； One end of described electronic type voltage transformer to be measured (17) was connected with the described phase shifter (3), the other end and described PT Combining unit (20) is connected；Described message controller (12) be arranged at described PT combining unit (20) and described between All it is connected between combining unit (21) and with described PT combining unit (20) and described interval combining unit (21) Connect；Described interval combining unit (21) is connected with digitalized electrical energy meter to be measured (23) by process layer switch (22) Connect；Described digitalized electrical energy meter to be measured (23) is connected with host computer (16) by wall switch (15)；

Described multi-channel electronic formula mutual-inductor tester (9), described protocol converter (11) are all handed over by described wall Change planes (15) be connected with host computer (16)；Described temperature and humidity test instrument (13) and described vibration measurement instrument (14) It is arranged at electronic type voltage transformer to be measured (17) and/or electronic current mutual inductor relevant position to be measured and host computer (16) it is connected.

The test device of digitalized electric energy metering system the most according to claim 1, it is characterised in that described phase shift Device (3) includes 3 voltage phase output terminals, described voltage phase output terminal respectively with standard potential transformer (6) and treating Survey electronic type voltage transformer (17) to be connected.

The test device of digitalized electric energy metering system the most according to claim 1, it is characterised in that include 3 Group pressure regulator (4) and current lifting device (5)；Described second three-phase main-frequency voltage source (2) is connected with often organizing pressure regulator (4), Often organize described current lifting device (5) respectively with corresponding standard current transformer (7) and electronic current mutual inductor phase to be measured Connect.

The test device of digitalized electric energy metering system the most according to claim 1, it is characterised in that described message Controller (12) is by IEC61850-9-2 stipulations and described PT combining unit (20) and described interval combining unit (21) it is connected, communicates.

The test device of digitalized electric energy metering system the most according to claim 1, it is characterised in that described to be measured Electronic current mutual inductor includes optical electron formula current transformer (19) to be measured, described electronic type voltage transformer to be measured (17) optical electron formula voltage transformer to be measured is included；Described temperature and humidity test instrument (13) and described vibration measurement instrument (14) optical electron formula current transformer (19) to be measured and/or optical electron formula voltage transformer corresponding positions to be measured it are arranged at Put, and described temperature and humidity test instrument (13) and described vibration measurement instrument (14) are by serial communication port and host computer (16) it is connected.