CN103926495B - Stepping up from zero test system - Google Patents

Stepping up from zero test system Download PDF

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Publication number
CN103926495B
CN103926495B CN201410186270.6A CN201410186270A CN103926495B CN 103926495 B CN103926495 B CN 103926495B CN 201410186270 A CN201410186270 A CN 201410186270A CN 103926495 B CN103926495 B CN 103926495B
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secondary side
voltage
current
optical
stepping
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CN103926495A (en
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孙翔
何文林
刘浩军
董雪松
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
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Abstract

The invention provides a kind of stepping up from zero test system, including:Combination photoelectric formula transformer, combiner and host computer, combination photoelectric formula transformer gathers the voltage and current of tested device pressure side simultaneously, then it is that secondary side voltage, electric current are converted into secondary side current and are uploaded to host computer by combiner by photovoltaic conversion, host computer is reduced to the electric current of tested device pressure side by secondary side voltage to be reduced to the voltage of tested device pressure side, secondary side current, realizes the measurement to tested device pressure side voltage, electric current.As combination photoelectric formula transformer, therefore, it can meet the test request that the stepping up from zero of various electric pressure devices is tested, so as to solve a difficult problem of the prior art into low-voltage, the characteristic of small current with by high voltage or high current scaling transformation.

Description

Stepping up from zero test system
Technical field
The present invention relates to stepping up from zero technical field of measurement and test, more particularly, it relates to a kind of stepping up from zero test system.
Background technology
Stepping up from zero be for transformator, longer lines and bus accident after, to detect whether also to there is failure, or pin To some can with stepping up from zero, prevent full voltage add problematic equipment.Traditional stepping up from zero test system is set by multiple Standby combination is built, including:Combination current voltage transformer, current-voltage measurement instrument are (for example:Multifunctional meter, ammeter, voltage Table, power meter etc.), current-voltage transformer measurement voltage and current, ammeter, voltmeter and power meter are measured for reading Electric current, voltage and the power for arriving.
But, the scope of traditional stepping up from zero test system measurement is less, can only reach 35kV grades, to higher electricity The traditional stepping up from zero test system of pressure grade (such as 1000kV) is not simultaneously applied to, therefore, how a kind of stepping up from zero is provided and is surveyed Test system is those skilled in the art's skill urgently to be resolved hurrily with the test request for being suitable for the stepping up from zero of various electric pressure devices Art problem.
The content of the invention
In view of this, the present invention provides a kind of stepping up from zero test system, to realize to each zero raising of electric pressure device The test of pressure.
A kind of stepping up from zero test system, including:
Combination photoelectric formula transformer, the primary side of the combination photoelectric formula transformer are connected with the power supply lead wire of tested device Connect, the combination photoelectric formula transformer for the collection synchronizing signal that receives as trigger, while gathering tested device The voltage and current of pressure side, and be that secondary side voltage, the electric current are converted into secondary side current output by the photovoltaic conversion;
The combiner being connected with the secondary side of the combination photoelectric formula transformer, the combiner is for the control to receive Signal processed is triggering command, exports the collection synchronizing signal to the combination photoelectric formula transformer;Receive described for synchronous All of described secondary side voltage and the secondary side current that combination photoelectric formula transformer is exported in collection period, and will be same The secondary side voltage at moment and the secondary side current are collected and are exported, wherein, the collection period is adopted with described The frequency of collection synchronizing signal is corresponding;
The host computer being connected with the combiner, the host computer is for the combiner output control signal; For obtaining all of secondary side voltage and the secondary side current, and it is the quilt by each secondary side photovoltaic conversion The voltage of device pressure side is surveyed, each secondary side current is converted into the electric current of the tested device pressure side.
Preferably, the combination photoelectric formula transformer is a kind of by The Rogowski Optical Current Transformer and Optical Potential Transformer Combine in a structure body, the combined electrical apparatus with double electrical measurement functions.
Preferably, the combination photoelectric formula transformer includes:Luo-coil, bleeder mechanism, Acquisition Circuit, trigger collection electricity Road and D/A converting circuit;
The input of the trigger collection circuit is connected with the outfan of the combiner, the trigger collection circuit it is defeated Go out end to be connected with the input of the Acquisition Circuit, the trigger collection circuit is for by the collection synchronizing signal for receiving The trigger is converted into, and the trigger is exported to the Acquisition Circuit;
The current acquisition end of the Acquisition Circuit is connected with the Luo-coil, the voltage acquisition end of the Acquisition Circuit with The bleeder mechanism connection, after the Acquisition Circuit receives the trigger, while obtaining the Luo-coil output The secondary side current and the secondary side voltage of bleeder mechanism output, and export the secondary side current and described two Secondary side voltage;
The input of the D/A converting circuit is connected with the outfan of the Acquisition Circuit, the D/A converting circuit Outfan is connected with the input of the combiner, and the D/A converting circuit is used to obtain the secondary side voltage and described two Secondary side electric current, respectively by the secondary side photovoltaic conversion is for the secondary side voltage of optical fiber and digital signal form and exports to institute Combiner is stated, the secondary side current is converted into into the secondary side current of optical fiber and digital signal form and is exported to the conjunction And device.
Preferably, the combiner includes:Central control unit, the first optical-electrical converter and the second optical-electrical converter;
The central control unit is connected with the host computer, for receiving the control letter of the host computer output Number, and with the control signal as the triggering command, export the collection synchronizing signal;By the synchronous synchronization for receiving The secondary side voltage and the secondary side current are collected and are exported;
The input of first optical-electrical converter is connected with the central control unit, first optical-electrical converter Outfan is connected with the combination photoelectric formula transformer, first optical-electrical converter for by it is described collection synchronizing signal conversion For the collection synchronizing signal of optical fiber and digital signal form, and export to the combination photoelectric formula transformer;
The input of second optical-electrical converter is connected with the combination photoelectric formula transformer, second opto-electronic conversion Device outfan is connected with the central control unit, and second optical-electrical converter is for the combination photoelectric formula transformer is existed Collection period output all of described secondary side photovoltaic conversion for digital signal form the secondary side voltage, and export to The central control unit, all of secondary side current are converted into the secondary side current of digital signal form, and defeated Go out to the central control unit.
Preferably, the central control unit includes:Field programmable gate array control chip and controller;
The field programmable gate array control chip is used to export the collection synchronizing signal;
The controller is for the secondary side voltage and the secondary side current of the synchronous synchronization for receiving are entered Row collects and exports.
Preferably, first optical-electrical converter is identical with the model of second optical-electrical converter, size.
Preferably, the combination photoelectric formula transformer is connected with the combiner by digital fiber, synchronization optical fiber respectively, The combination photoelectric formula transformer exports the secondary side voltage and described secondary to the combiner by the digital fiber Side electric current, the combiner export the collection synchronizing signal to the combination photoelectric formula transformer by the synchronization optical fiber.
Preferably, the host computer is personal computer.
Preferably, the host computer is additionally operable to the voltage according to the tested device pressure side, tested device pressurization The electric current of side, be calculated the average voltage of the tested device pressure side, voltage effective value, power, power factor and Frequency.
Preferably, the host computer is additionally operable to for the voltage of all of described tested device pressure side for obtaining to be depicted as phase The electric current of all of tested device pressure side is depicted as corresponding current waveform by the voltage waveform answered.
It can be seen from above-mentioned technical scheme that, the invention provides a kind of stepping up from zero test system, including:Combination light Electric-type transformer, combiner and host computer, combination photoelectric formula transformer gather the voltage and current of tested device pressure side simultaneously, Then it is that secondary side voltage, electric current are converted into secondary side current and are uploaded to host computer, host computer by combiner by photovoltaic conversion The electricity of tested device pressure side is reduced to by secondary side voltage to be reduced to the voltage of tested device pressure side, secondary side current Stream, realizes the measurement to tested device pressure side voltage, electric current.As combination photoelectric formula transformer is with by high voltage or big Electric current scaling transformation is surveyed into low-voltage, the characteristic of small current, the stepping up from zero that therefore, it can meet various electric pressure devices The test request of examination, so as to solve a difficult problem of the prior art.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of stepping up from zero test system disclosed in the embodiment of the present invention;
Fig. 2 is a kind of composition structural representation of combination photoelectric formula transformer disclosed in the embodiment of the present invention;
Composition structural representations of the Fig. 3 for a kind of combiner disclosed in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, the embodiment of the invention discloses a kind of structural representation of stepping up from zero test system, including:Combination Photoelectric current transformer (Electronic Current Voltage Transformer, ECVT) 11, combiner 12 and host computer 13;
Wherein:
The primary side of ECVT11 is connected with the power supply lead wire 001 of tested device, and secondary side and the combiner 12 of ECVT11 connect Connect, ECVT11 for receive combiner 12 output collection synchronizing signal as trigger, while gather tested device The voltage and current of pressure side, and be that secondary side voltage, the electric current are converted into secondary side current output by the photovoltaic conversion.
ECVT11 is a kind of by The Rogowski Optical Current Transformer (Emission Computed Tomography, ECT) and light Electric-type voltage transformer (Electronic Voltage Transformer, EVT) is combined in a structure body, with double electricity The combined electrical apparatus of measurement function.ECVT11 can be according to the collection synchronizing signal for receiving, while obtaining the quilt that EVT is collected The electric current of the tested device that the voltage and ECT of survey device is collected.
The function of ECVT11 is into normal low voltage (such as 100V) or standard by high voltage or high current scaling transformation Small current (5A or 10A, refer both to rated value), to realize the standardization of measuring instrumentss, protection equipment and automatic controlling device, little Type.
Combiner 12 is connected with host computer 13, and combiner 12 for the control signal exported with the host computer 13 for receiving is Triggering command, exports the synchronous acquisition signal to ECVT11;For the synchronous ECVT11 that receives in owning that collection period is exported The secondary side voltage and secondary side current, and the secondary side voltage and the secondary side current of synchronization are carried out Collect and export.
Wherein, corresponding with the frequency of collection synchronizing signal using the cycle, i.e., frequency acquisition is by collection synchronous signal frequency Control.
Host computer 13 obtains all of secondary side voltage and secondary side current, and by each secondary side photovoltaic conversion For the voltage of tested device pressure side, each secondary side current is converted into the electric current of tested device pressure side.
Preferably, host computer 13 can be PC (Personal Computer, personal computer) machine.
In summary it can be seen, the ECVT11 in the present invention can gather the voltage and current of tested device pressure side simultaneously, Then it is that secondary side voltage, electric current are converted into secondary side current and are uploaded to host computer 13 by combiner 12 by photovoltaic conversion, on Position machine 13 is reduced to tested device pressurization by secondary side voltage to be reduced to the voltage of tested device pressure side, secondary side current The electric current of side, realizes the measurement to tested device pressure side voltage, electric current.As ECVT11 is with by high voltage or high current Scaling transformation therefore, it can to meet the stepping up from zero test of various electric pressure devices into low-voltage, the characteristic of small current Test request, so as to solve a difficult problem of the prior art.
And, need the combined layouts such as voltmeter, ammeter, power meter, certainty of measurement to be difficult to control relative to prior art For system, the stepping up from zero test system that the present invention is provided is the voltage and current of simultaneously collection tested device pressure side, then The voltage and current of tested device pressure side is calculated by host computer 13, test result accuracy is high, and test speed is fast, and And, there is no the danger such as the letting out, leak, firing of oil gas structure, quick-fried in the combination photoelectric formula transformer that the present invention is adopted.
Wherein, ECVT11 is connected by digital fiber, synchronization optical fiber and combiner 12 respectively, and ECVT11 is by the numeral Optical fiber exports secondary side voltage and secondary side current to combiner 12, and combiner 12 is exported to ECVT11 by the synchronization optical fiber Collection synchronizing signal.
It should be noted is that, ECT is by the data of the current signal transfer of primary side to low-pressure side using optical fiber Reason system, for traditional current transformer is that primary side current signal is passed to secondary side by electromagnetic induction, ECT Transmission to current signal is not controlled by electric pressure, and the electric current of each electric pressure device can be measured.
EVT is the data handling system that the voltage signal of primary side is transferred to low-pressure side using optical fiber, relative to tradition Voltage transformer be primary side voltage signal is passed to into secondary side by electromagnetic induction or voltage divider principle for, EVT is to voltage The transmission of signal is not controlled by electric pressure, and the voltage of each electric pressure device can be measured.
It should be noted is that, ECT can be divided into Luo-coil type (Rogowski Coil according to sensor type Transformer, RCT) and high precision electric current transducer type (Low Power Current Transformer, LPCT), due to Luo-coil has broadband, large-scale feature, therefore, the ECT in the present embodiment selects RCT.
It should be noted is that, when surveying to tested device three-phase (A phases, B phases and C phases) respective voltage and current During amount, stepping up from zero test system need to adopt three ECVT11 (referring specifically to Fig. 1).
Referring to Fig. 2, the invention provides a kind of composition structural representation of combination photoelectric formula transformer, including:Roche line Circle 111, bleeder mechanism 112, Acquisition Circuit 113, trigger collection circuit 114 and D/A converting circuit 115;
Wherein:
The input of trigger collection circuit 114 is connected with the outfan of combiner 12, the outfan of trigger collection circuit 114 It is connected with the input of Acquisition Circuit 113, trigger collection circuit 114 is for being converted into triggering by the collection for receiving synchronizing signal Signal, and trigger is exported to Acquisition Circuit 113.
The current acquisition end of Acquisition Circuit 113 is connected with Luo-coil 111, the voltage acquisition end of Acquisition Circuit 113 with point Pressure device 112 connects, after Acquisition Circuit 113 receives the trigger, while obtaining the secondary side of the output of Luo-coil 111 Electric current and the secondary side voltage of the output of bleeder mechanism 112, and export the secondary side current and the secondary side voltage.
It should be noted that Luo-coil 111 is a kind of loop coil of uniform winding on nonferromugnetic material.Roche Coil 111 is with can measure in real time to electric current, fast response time, will not saturation, no phase error the characteristics of, therefore which can be applied In the signals such as relay protection, silicon controlled rectifier, frequency control it is serious it is several all over and the high current such as electric furnace, short-circuit test occasion.
Bleeder mechanism 112 be it is a kind of by capacitor bank into potentiometer, belong to a component of Optical Potential Transformer.
The input of D/A converting circuit 115 is connected with the outfan of Acquisition Circuit 113, D/A converting circuit 115 it is defeated Go out end to be connected with the input of combiner 12, D/A converting circuit 115 is used to obtain secondary side voltage and secondary side current, respectively By the secondary side photovoltaic conversion is for the secondary side voltage of optical fiber and digital signal form and exports to combiner 12, by secondary side electricity Circulation turns to the secondary side current of optical fiber and digital signal form and exports to combiner 12.
It should be noted is that, in the circulation of whole controlling of sampling, Acquisition Circuit 113 is in sampling all the time and keeps shape State, the collection synchronizing signal until receiving the transmission of combiner 12.Acquisition Circuit 113 is being received and is correctly recognizing that collection is synchronous After signal, the release hold mode of Acquisition Circuit 113 starts to be acquired the voltage and current of tested device pressure side, runs Sample cyclic.Sample magnitude (voltage and current of tested device pressure side) is converted into fiber count via D/A converting circuit 115 After the sample magnitude of word signal form, combiner 12 is transferred to, completes a sample cyclic.
In sample cyclic is performed, Acquisition Circuit 113 is no longer received the collection synchronizing signal sent by combiner 12.
In actual use, the upper limit has been tested and arranged to the highest sample rate of stepping up from zero test system, and user will not There is the situation of overclocking sampling.
Referring to Fig. 3, the embodiment of the invention discloses a kind of composition structural representation of combiner, combiner includes:Central authorities Control unit 121, the first optical-electrical converter 122 and the second optical-electrical converter 123;
Central control unit 121 is connected with host computer 13, for receiving the control signal of the output of host computer 13, and with described Control signal is triggering command, output collection synchronizing signal;By the secondary side voltage and secondary side of the synchronous synchronization for receiving Electric current is collected and is exported;
Wherein, central control unit 121 includes:FPGA (Field-Programmable Gate Array, can compile by scene Journey gate array) control chip and controller, FPGA control chip is used to export collection synchronizing signal, and controller is connect for synchronously The secondary side voltage of the synchronization of receipts and secondary side current are collected and are exported.
The input of the first optical-electrical converter 122 is connected with central control unit 121, the first optical-electrical converter 122 it is defeated Go out end to be connected with ECVT11, the first optical-electrical converter 122 is converted into optical fiber and digital signal form for will gather synchronizing signal The collection synchronizing signal, and export to ECVT11;
Specifically, the outfan of the first optical-electrical converter 122 is connected with the trigger collection circuit 114 of ECVT11, the first light Electric transducer 122 will gather synchronizing signal and be converted into the collection synchronizing signal of optical fiber and digital signal form, and export to adopting Collection triggers circuit 114.
The input of the second optical-electrical converter 123 is connected with ECVT11, outfan and the central authorities of the second optical-electrical converter 123 Control unit 121 connects, and the second optical-electrical converter 123 is for all of secondary side voltage that ECVT11 is exported in collection period The secondary side voltage of digital signal form is converted into, and is exported to central control unit 121, all of secondary side current is converted into The secondary side current of digital signal form, and export to central control unit 121.
Specifically, the input of the second optical-electrical converter 123 is connected with the D/A converting circuit 115 of ECVT11, the second light The all of secondary side photovoltaic conversion that D/A converting circuit 115 is exported in collection period by electric transducer 123 is digital signal shape The secondary side voltage of formula, and export to central control unit 121, all of secondary side current is converted into the two of digital signal form Secondary side electric current, and export to central control unit 121.
Wherein, the first optical-electrical converter 122 is identical with the model of the second optical-electrical converter 123, size.
First optical-electrical converter 122 and the second optical-electrical converter 123 are provided with optical fiber interface and RJ45 interfaces, and optical fiber connects For connecting ECVT11, RJ45 interfaces are used to connect central control unit 121 mouth.
It should be noted is that, the controller in central control unit 121 is based on Vxworks real-time systems PowerPC controllers, FPGA control chip are million FPGA control chips of Xilinx.
Central control unit 121 is main to realize following control and data function:
Frequency conversion data acquisition function:
In stepping up from zero test system, different, stepping up from zero test system is required with the sample frequency of stable state to transient state Require the transient-wave in the high sampling rate record short time of 200kS/s and be analyzed upload, in this case, central authorities' control Unit 121 will set drainage pattern according to host computer 13, and self-adaptative adjustment gathers the transmission frequency of synchronizing signal, and ECVT11's adopts Collector 113 will complete collection and data back task to respond picking rate under the control of collection synchronizing signal, and data are returned After reaching the process packing of central control unit 121, via Vxworks real-time control stepping up from zero test systems from Ethernet control Device is uploaded to host computer 13.
Wherein, 61850 data communications are adopted between central control unit 121 and host computer 13.
As stepping up from zero test system requires the sampling of multichannel, big data and altofrequency, central control unit 121 Employ the onboard clock of 40Mhz high frequencies (highest supports frequency dividing to 200Mhz), 512Mb Large Copacity RAM forming types, to guarantee temporarily When state is gathered, the big data flow of 16 passage 200kS/s can smoothly complete sampling and receive.
In high speed data transfer collection, the sample states that central control unit 121 is passed according to host computer 13 down reduce adopting Synchronizing signal transmission frequency is used, Acquisition Circuit 113 is gathering synchronizing signal corresponding frequencies under the control of collection synchronizing signal Under, carrying out stable state and adopt and upload gathered data (voltage and current of tested device pressure side), central control unit 121 is completed After to the process packing of sampled data, upload from ethernet controller via Vxworks real-time control stepping up from zero test systems To host computer 13.
It should be noted is that, the host computer 13 in the various embodiments described above is additionally operable to the electricity according to tested device pressure side Pressure and electric current, are calculated the average voltage of tested device pressure side, voltage effective value, power (active power and idle work( Rate), the electric parameter such as power factor and frequency.
Host computer 13 is additionally operable to for the voltage of all of tested device pressure side for obtaining to be depicted as corresponding voltage waveform, The electric current of all of tested device pressure side is depicted as into corresponding current waveform, such that it is able to check three times of harmonic wave, five times, The size of seven times and nine aliquots with respect to fundamental voltage amplitude ratio.
In this specification, each embodiment is described by the way of progressive, and what each embodiment was stressed is and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention. Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one The most wide scope for causing.

Claims (10)

1. a kind of stepping up from zero test system, it is characterised in that include:
Combination photoelectric formula transformer, the primary side of combination photoelectric formula transformer are connected with the power supply lead wire of tested device, institute Combination photoelectric formula transformer is stated for the collection synchronizing signal that receives as trigger, while gathering tested device pressure side Voltage and current, and be that secondary side voltage, the electric current are converted into secondary side current output by the photovoltaic conversion;
The combiner being connected with the secondary side of the combination photoelectric formula transformer, the combiner is for the control letter to receive Number be triggering command, the collection synchronizing signal is exported to the combination photoelectric formula transformer;The combination is received for synchronous All of described secondary side voltage and the secondary side current that photoelectric current transformer is exported in collection period, and by synchronization The secondary side voltage and the secondary side current collected and exported, wherein, the collection period is same with the collection The frequency of step signal is corresponding;
The host computer being connected with the combiner, the host computer is for the combiner output control signal;For The all of secondary side voltage and the secondary side current are obtained, and is the tested dress by each secondary side photovoltaic conversion The voltage of pressure side is put, each secondary side current is converted into the electric current of the tested device pressure side.
2. stepping up from zero test system according to claim 1, it is characterised in that the combination photoelectric formula transformer is Plant and The Rogowski Optical Current Transformer and Optical Potential Transformer are combined in a structure body, with double electrical measurement functions Combined electrical apparatus.
3. stepping up from zero test system according to claim 1, it is characterised in that the combination photoelectric formula transformer bag Include:Luo-coil, bleeder mechanism, Acquisition Circuit, trigger collection circuit and D/A converting circuit;
The input of the trigger collection circuit is connected with the outfan of the combiner, the outfan of the trigger collection circuit It is connected with the input of the Acquisition Circuit, the trigger collection circuit is for by the collection synchronizing signal for receiving conversion For the trigger, and the trigger is exported to the Acquisition Circuit;
The current acquisition end of the Acquisition Circuit is connected with the Luo-coil, the voltage acquisition end of the Acquisition Circuit with it is described Bleeder mechanism connects, after the Acquisition Circuit receives the trigger, while obtaining the described of the Luo-coil output Secondary side current and the secondary side voltage of bleeder mechanism output, and export the secondary side current and the secondary side Voltage;
The input of the D/A converting circuit is connected with the outfan of the Acquisition Circuit, the output of the D/A converting circuit End is connected with the input of the combiner, and the D/A converting circuit is used to obtain the secondary side voltage and the secondary side Electric current, respectively by the secondary side photovoltaic conversion is for the secondary side voltage of optical fiber and digital signal form and exports to the conjunction And device, the secondary side current is converted into into the secondary side current of optical fiber and digital signal form and is exported to the merging Device.
4. stepping up from zero test system according to claim 1, it is characterised in that the combiner includes:Central authorities' control Unit, the first optical-electrical converter and the second optical-electrical converter;
The central control unit is connected with the host computer, for receiving the control signal of the host computer output, and With the control signal as the triggering command, the collection synchronizing signal is exported;By described in the synchronous synchronization for receiving Secondary side voltage and the secondary side current are collected and are exported;
The input of first optical-electrical converter is connected with the central control unit, the output of first optical-electrical converter End be connected with the combination photoelectric formula transformer, first optical-electrical converter for by it is described gather synchronizing signal be converted into light The collection synchronizing signal of fine digital signal form, and export to the combination photoelectric formula transformer;
The input of second optical-electrical converter is connected with the combination photoelectric formula transformer, and second optical-electrical converter is defeated Go out end be connected with the central control unit, second optical-electrical converter for by the combination photoelectric formula transformer gathering The secondary side voltage of all of described secondary side photovoltaic conversion of cycle output for digital signal form, and export to described Central control unit, all of secondary side current are converted into the secondary side current of digital signal form, and export to The central control unit.
5. stepping up from zero test system according to claim 4, it is characterised in that the central control unit includes:It is existing Field programmable gate array control chip and controller;
The field programmable gate array control chip is used to export the collection synchronizing signal;
The controller is for the secondary side voltage and the secondary side current of the synchronous synchronization for receiving are converged It is total and export.
6. stepping up from zero test system according to claim 4, it is characterised in that first optical-electrical converter and described The model of the second optical-electrical converter, size are identical.
7. stepping up from zero test system according to claim 1, it is characterised in that the combination photoelectric formula transformer difference Be connected with the combiner by digital fiber, synchronization optical fiber, the combination photoelectric formula transformer by the digital fiber to The combiner exports the secondary side voltage and the secondary side current, and the combiner is by the synchronization optical fiber to described Combination photoelectric formula transformer exports the collection synchronizing signal.
8. stepping up from zero test system according to claim 1, it is characterised in that the host computer is personal computer.
9. stepping up from zero test system according to claim 1, it is characterised in that the host computer is additionally operable to according to described The electric current of the voltage of tested device pressure side, the tested device pressure side, is calculated the electricity of the tested device pressure side Flatten average, voltage effective value, power, power factor and frequency.
10. stepping up from zero test system according to claim 1, it is characterised in that the host computer is additionally operable to obtain The voltage of all of described tested device pressure side be depicted as corresponding voltage waveform, all of tested device is pressurizeed The electric current of side is depicted as corresponding current waveform.
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