CN104597424A - Verification platform and verification method for electric energy measurement of optical transformer - Google Patents
Verification platform and verification method for electric energy measurement of optical transformer Download PDFInfo
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- CN104597424A CN104597424A CN201510006666.2A CN201510006666A CN104597424A CN 104597424 A CN104597424 A CN 104597424A CN 201510006666 A CN201510006666 A CN 201510006666A CN 104597424 A CN104597424 A CN 104597424A
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Abstract
The invention relates to a verification platform and a verification method for the electric energy measurement of an optical transformer. The platform includes a standard voltage transformer, a standard current transformer, an optical transformer to be measured, a simulative electric energy measuring device, an AD conversion device, a first combining unit, a first digitized electric energy measuring device, a second combining unit, a second digitized electric energy measuring device and an upper computer, wherein the output ends of the standard voltage transformer and the standard current transformer are both connected with the input ends of the simulative electric energy measuring device and the AD conversion device, the input end of the first combining unit is connected with the output end of the AD conversion device, the output end of the first combining unit is connected with the first digitized electric energy measuring device, the optical transformer and the AD conversion device are both connected with the second combining unit which is connected with the second digitized electric energy measuring device, and the simulative electric energy measuring device and the first and second digitized electric energy measuring devices are all connected with the upper computer. The platform is high in verification precision and provides guarantee for the implementation and application of the optical transformer in electric energy measurement.
Description
Technical field
The present invention relates to a kind of Electric Energy Metering Technology field, particularly a kind of optical transformer electric energy metrical verification platform and verification method.
Background technology
In the structure of traditional electric energy metered system, the mutual inductor used is the analog sensor based on electromagnetic induction principle, namely electromagnetic transformer is adopted, structure as shown in Figure 1 adopts electromagnetic current transducer and electromagnetic potential transformer, small area analysis, the small voltage with primary current and voltage in proportion is induced from line facility to be measured, enter simulation electric power meter and carry out computing, calculate energy value.Its shortcoming is: along with the raising of electric pressure, easily occurs that second open circuit is dangerous, is subject to electromagnetic interference influence, magnetic saturation brings the safety problems such as little compared with big error, dynamic range in electric energy metrical use procedure.
Optical transformer can overcome the above problems, and optical transformer primary side adopts non-active operation mode usually, forms optics isolate with secondary side, therefore effectively prevent the problem of the electromagnetic interference (EMI) that Current Transformer Using Active Compensation exists; And security is good, thoroughly avoid the danger such as second open circuit, oil gas explosion that traditional mutual inductor exists; No matter simulate mutual inductor or optical transformer, in transformer station's metrology applications, all require that error is no more than 0.2%, in current engineer applied, optical current mutual inductor and optical voltage transformer have all reached the accuracy requirement of 0.2%, meet the requirement of electric energy metrical to mutual inductor in theory completely, but also do not verify in actual motion at present.
Summary of the invention
The present invention is directed to traditional electromagnetic transformer in electric energy metrical use procedure, easily to occur that second open circuit is dangerous, be subject to the problem that electromagnetic interference influence and optical transformer lack checking in electric energy metrical uses, a kind of optical transformer electric energy metrical verification platform is provided, can verify whether optical transformer can be applied to electric energy metrical, and checking precision is high, for optical transformer provides guarantee practicing of electric energy metrical.The invention still further relates to a kind of optical transformer electric energy metrical verification method.
Technical scheme of the present invention is as follows:
A kind of optical transformer electric energy metrical verification platform, it is characterized in that, comprise the standard potential transformer gathering the information of voltage that power source exports, gather the standard current transformer of the current information that power source exports and gather the optical transformer to be measured of power source output information, also comprise simulation electric power meter, a/d conversion device, first merge cells, first digitalized electric energy measuring apparatus, second merge cells, second digitalized electric energy measuring apparatus and host computer, the equal connecting analog electric power meter of output terminal of described standard potential transformer and standard current transformer and the input end of a/d conversion device, the described input end of the first merge cells is connected with the output terminal of a/d conversion device, the output terminal of described first merge cells connects the first digitalized electric energy measuring apparatus, the output terminal of described optical transformer and a/d conversion device all connects the input end of the second merge cells, the output terminal of described second merge cells connects the second digitalized electric energy measuring apparatus, described simulation electric power meter, first digitalized electric energy measuring apparatus is all connected with host computer with the second digitalized electric energy measuring apparatus.
Described optical transformer is the optical current mutual inductor gathering the current information that power source exports, described a/d conversion device comprises the first a/d conversion device and the second a/d conversion device, the output terminal of described standard current transformer connects the input end of the first a/d conversion device, the output terminal of standard potential transformer connects the input end of the second a/d conversion device, described first a/d conversion device is all connected the input end of the first merge cells with the output terminal of the second a/d conversion device, and the output terminal of described second a/d conversion device also connects the input end of the second merge cells.
Described optical transformer is the optical voltage transformer gathering the information of voltage that power source exports, described a/d conversion device comprises the first a/d conversion device and the second a/d conversion device, the output terminal of described standard current transformer connects the input end of the first a/d conversion device, the output terminal of standard potential transformer connects the input end of the second a/d conversion device, described first a/d conversion device is all connected the input end of the first merge cells with the output terminal of the second a/d conversion device, and the output terminal of described first a/d conversion device also connects the input end of the second merge cells.
Also comprise the optical voltage transformer to be measured gathering the information of voltage that power source exports, and the 3rd merge cells be connected with optical voltage transformer successively and the 3rd digitalized electric energy measuring apparatus, the output terminal of described optical current mutual inductor also connects the input end of the 3rd merge cells, and described 3rd digitalized electric energy measuring apparatus is connected with host computer.
Also comprise the optical current mutual inductor to be measured gathering the current information that power source exports, and the 4th merge cells be connected with optical current mutual inductor successively and the 4th digitalized electric energy measuring apparatus, the output terminal of described optical voltage transformer also connects the input end of the 4th merge cells, and described 4th digitalized electric energy measuring apparatus is connected with host computer.
Also comprise gps clock module, described first merge cells and the second merge cells are all connected gps clock module with the pps pulse per second signal receiving gps clock module and send or B coded signal.
Also comprise gps clock module, described first merge cells, the second merge cells and the 3rd merge cells are all connected gps clock module with the pps pulse per second signal receiving gps clock module and send or B coded signal.
Also comprise gps clock module, described first merge cells, the second merge cells and the 4th merge cells are all connected gps clock module with the pps pulse per second signal receiving gps clock module and send or B coded signal.
A kind of optical transformer electric energy metrical verification method, it is characterized in that, simulation small voltage signal and simulation small area analysis signal is exported respectively, by simulation small voltage signal with simulate small area analysis signal and export simulation electric power meter to after gathering the information of voltage of power source and current information by standard potential transformer and standard current transformer; Simulate small voltage signal and simulation small area analysis signal all carries out AD conversion by a/d conversion device thus is converted to digital voltage value and digital current values respectively simultaneously, by the first merge cells digital voltage value and digital current values carried out framing and be sent to the first digitalized electric energy measuring apparatus according to standard agreement; Digital value is exported after optical transformer to be measured being gathered the corresponding information of power source, the digital voltage value that the digital value exported with optical transformer this digital value and a/d conversion device exported by the second merge cells matches or digital current values carry out framing, and are sent to the second digitalized electric energy measuring apparatus according to standard agreement; Then three energy values of simulation electric power meter, the first digitalized electric energy measuring apparatus and the second digitalized electric energy measuring apparatus are received respectively by host computer, and compare in real time, judge that whether the continuous data that optical transformer to be measured exports is feasible for electric energy metrical by error calculation.
When optical transformer to be measured is optical current mutual inductor, the digital voltage value that output digital current values after optical current mutual inductor gathers the current information of power source output and a/d conversion device export all enters the second merge cells, by the second merge cells, digital current values and digital voltage value are carried out framing, and being sent to the second digitalized electric energy measuring apparatus according to standard agreement, by error calculation, host computer judges that whether the continuous data that this optical current mutual inductor exports is feasible for electric energy metrical;
When optical transformer to be measured is optical voltage transformer, the digital voltage value that optical voltage transformer exports after gathering the information of voltage of power source output and the digital current values that a/d conversion device exports all enter the second merge cells, by the second merge cells, digital voltage value and digital current values are carried out framing, and being sent to the second digitalized electric energy measuring apparatus according to standard agreement, by error calculation, host computer judges that whether the continuous data that this optical voltage transformer exports is feasible for electric energy metrical;
First merge cells and the second merge cells all receive the data syn-chronization that pps pulse per second signal that gps clock sends or B coded signal make standard current transformer and standard potential transformer and optical transformer to be measured.
Technique effect of the present invention is as follows:
Optical transformer electric energy metrical verification platform provided by the invention, standard potential transformer is set, standard current transformer and optical transformer to be measured, simulation electric power meter is also set, a/d conversion device, first merge cells, first digitalized electric energy measuring apparatus, second merge cells, second digitalized electric energy measuring apparatus and host computer, standard potential transformer and standard current transformer gather voltage signal and current signal that power source exports respectively and export simulation small voltage signal and simulation small area analysis signal to simulating electric power meter, simulation electric power meter display energy value, simulate small voltage signal and small area analysis signal all carry out AD conversion by a/d conversion device thus be converted to digital voltage value respectively and digital current values enters the first merge cells simultaneously, digital voltage value and digital current values are carried out framing and are sent to the first digitalized electric energy measuring apparatus according to standard agreement by the first merge cells, the first digitalized electric energy measuring apparatus display energy value, optical transformer to be measured gathers the output information of power source and exports digital value and send into the second merge cells, the digital voltage value that the digital value exported with optical transformer that this digital value and a/d conversion device export by the second merge cells matches or digital current values carry out framing, and be sent to the second digitalized electric energy measuring apparatus according to standard agreement, second digitalized electric energy measuring apparatus display energy value, final host computer receives simulation electric power meter respectively, three energy values of the first digitalized electric energy measuring apparatus and the second digitalized electric energy measuring apparatus, compared in real time by host computer, judge that whether the continuous data that optical transformer to be measured exports is feasible for electric energy metrical by error calculation.This platform make use of the modulating output result of the recognized standard voltage transformer (VT) and standard current transformer and digital output results and coordinates the digitized electric energy metrical Output rusults of optical transformer to be measured to compare, each value of comparison includes current value and magnitude of voltage, if the error between the electric energy metrical Output rusults of optical transformer and standard mutual inductor Electric energy measurement is less than the error simulating electric energy metrical at present, then can verify that optical transformer can be applicable to electric energy metrical completely, by arranging verification platform of the present invention, whether checking optical transformer can be applied to electric energy metrical, avoid traditional electromagnetic transformer in electric energy metrical use procedure, easily occur that second open circuit is dangerous, be subject to the safety problem of electromagnetic interference influence, also solve the problem that current optical transformer lacks checking in electric energy metrical uses, and structure is simple, applying flexible, checking precision is high, for optical transformer provides guarantee practicing of electric energy metrical.
A/d conversion device also can be one and comprise and carry out analog-to-digital device to simulation small voltage signal and simulation small area analysis signal, also the first a/d conversion device and the second a/d conversion device can be adopted to substitute, first a/d conversion device is carried out the analog to digital conversion of simulation small area analysis signal thus is obtained digital current values, and the second a/d conversion device is carried out the analog to digital conversion of simulation small voltage signal thus obtained digital voltage value.When optical transformer to be measured is optical current mutual inductor, optical current mutual inductor exports digital current values after gathering the current information of power source output and enters the second merge cells, the digital voltage value that second a/d conversion device obtains simultaneously also enters the second merge cells, digital current values and digital voltage value are carried out framing by the second merge cells, and being sent to the second digitalized electric energy measuring apparatus according to standard agreement, by error calculation, host computer judges that whether the continuous data that this optical current mutual inductor exports is feasible for electric energy metrical.
By verification platform of the present invention after the checking of this optical current mutual inductor electric energy metrical, can carry out the electric energy metrical checking of optical voltage transformer further, optical current mutual inductor can as the basis of optical voltage transformer electric energy metrical.The 3rd merge cells and the 3rd digitalized electric energy measuring apparatus that are connected with optical voltage transformer are set, optical voltage transformer to be measured exports digital voltage value after gathering the information of voltage of power source output and enters the 3rd merge cells, the digital current values that optical current mutual inductor after empirical tests exports can input to the 3rd merge cells, digital voltage value and digital current values are carried out framing by the 3rd merge cells, and be sent to the 3rd digitalized electric energy measuring apparatus according to standard agreement, host computer receives simulation electric power meter and first, second and the 3rd four energy value of digitalized electric energy measuring apparatus, compared in real time by host computer, judge that whether the continuous data that optical voltage transformer to be measured exports is feasible for electric energy metrical by error calculation.
In like manner, electric energy metrical checking accurately when being optical voltage transformer that optical transformer electric energy metrical verification platform of the present invention also can complete optical transformer to be measured, and after checking optical voltage transformer, further on the basis of this structure, increase optical current mutual inductor to be measured and the 4th merge cells and the 4th digitalized electric energy measuring apparatus, and then complete the electric energy metrical checking of optical current mutual inductor.
The optical transformer electric energy metrical verification method that the present invention relates to, corresponding with above-mentioned optical transformer electric energy metrical verification platform, finally can judge that whether the continuous data that optical transformer to be measured exports is feasible for electric energy metrical, complete the accurate validation of optical transformer electric energy metrical, solve the problem that current optical transformer lacks checking in electric energy metrical uses.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional electric energy metered system.
Fig. 2 is the first preferred structure schematic diagram of optical transformer electric energy metrical verification platform of the present invention.
Fig. 3 is the second preferred structure schematic diagram of optical transformer electric energy metrical verification platform of the present invention.
Fig. 4 is the third preferred structure schematic diagram of optical transformer electric energy metrical verification platform of the present invention.
Fig. 5 is the 4th kind of preferred structure schematic diagram of optical transformer electric energy metrical verification platform of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described.
The present invention relates to a kind of optical transformer electric energy metrical verification platform, the electric energy metrical of optical transformer as optical current mutual inductor and optical voltage transformer can be carried out and verify.Fig. 2 is the first preferred structure schematic diagram of verification platform of the present invention, and also can be understood as is the preferred structure schematic diagram of optical current mutual inductor electric energy metrical verification platform.This verification platform comprises the standard potential transformer gathering the information of voltage that power source exports, gather the standard current transformer of the current information that power source exports and gather the optical current mutual inductor to be measured of the current information that power source exports, also comprise simulation electric power meter, a/d conversion device, first merge cells, first digitalized electric energy measuring apparatus, second merge cells, second digitalized electric energy measuring apparatus and host computer, a/d conversion device comprises the first a/d conversion device and the second a/d conversion device, the output terminal connecting analog electric power meter of standard current transformer and the input end of the first a/d conversion device, the output terminal connecting analog electric power meter of standard potential transformer and the input end of the second a/d conversion device, first a/d conversion device is all connected the input end of the first merge cells with the output terminal of the second a/d conversion device, the output terminal of the first merge cells connects the first digitalized electric energy measuring apparatus, the output terminal of optical current mutual inductor and the second a/d conversion device all connects the input end of the second merge cells, the output terminal of the second merge cells connects the second digitalized electric energy measuring apparatus, simulation electric power meter, first digitalized electric energy measuring apparatus is all connected with host computer with the second digitalized electric energy measuring apparatus.
In embodiment illustrated in fig. 2, power source output current and voltage signal, standard current transformer gathers current information and exports simulation small area analysis signal Ia by cable access simulation electric power meter; Standard potential transformer gathers information of voltage and exports simulation small voltage signal U by cable access simulation electric power meter, simulation electric power meter display energy value Ea.Standard current transformer and voltage transformer (VT) are owing to being calibration equipment, its accuracy requirement is higher than the mutual inductor accuracy class of practical application, therefore being High-precision standard mutual inductor, precision was better than for 0.1% (or perhaps error in dipping is less than or equal to 0.1%).
Standard current transformer gathers current information output simulation small area analysis signal Ia and accesses the first a/d conversion device by cable, and the first a/d conversion device converts simulation small area analysis signal Ia to digital current values Ib, sends into the first merge cells by optical cable; Standard potential transformer gathers information of voltage output simulation small voltage signal U and accesses the second a/d conversion device by cable, and the second a/d conversion device converts analog voltage signal U to digital voltage value Ud1, sends into the first merge cells by optical cable; Digital voltage value Ud1 and digital current values Ib is carried out framing by the first merge cells, is sent to the first digitalized electric energy measuring apparatus according to standard agreement, the first digitalized electric energy measuring apparatus display energy value Eb.First a/d conversion device of preferred employing and the precision of the second a/d conversion device are better than 0.05%, and the analog to digital conversion delivery outlet of the second a/d conversion device is no less than two; These two a/d conversion device also can comprise analog voltage with one and the analog-to-digital a/d conversion device of analog current replaces, then its analog to digital conversion delivery outlet is no less than three.Each merge cells can adopt the hardware module based on FPGA technology to realize, and merge cells mainly comprises: data sampling module, sampled-data processing module, data outputting module, also can comprise Synchronous Sampling Pulse series in addition and module occurs.Merge cells is the hardware product of existing maturation.
Optical current mutual inductor gathers current information output digital current values Ic and sends into the second merge cells by transmission cable; Standard potential transformer gathers information of voltage output simulation small voltage signal U and accesses the second a/d conversion device by cable, and the second a/d conversion device converts simulation small voltage signal U to digital voltage value Ud2, sends into the second merge cells by communications optical cable; Digital voltage value Ud2 and digital current values Ic is carried out framing by the second merge cells, is sent to the second digitalized electric energy measuring apparatus according to standard agreement, and the second digitalized electric energy measuring apparatus exports energy value Ec.Each digitalized electric energy measuring apparatus communication protocol preferably receives IEC61850-9-2 agreement.
In order to ensure that data sampling is synchronous, namely the measurement data of standard current transformer, standard potential transformer and optical current mutual inductor is synchronization, this verification platform also arranges gps clock module, and the first merge cells and the second merge cells are all connected gps clock module with the PPS pps pulse per second signal receiving gps clock module and send or B coded signal.
The electric energy metrical unit interval is T (usual T>10 minute).Be Ea (t1), Eb (t1) in the output valve of t1 moment three electric energy meters (simulation electric power meter, the first digitalized electric energy measuring apparatus and the second digitalized electric energy measuring apparatus), Ec (t1); Continuous power is the t2 moment after exporting and exceeding T time, writes down t2 moment three electric energy meter output valve Ea (t2), Eb (t2), Ec (t2); Energy value then between t1 ~ t2 exports as Ea=Ea (t2)-Ea (t1), Eb=Eb (t2)-Eb (t1), Ec=Ec (t2)-Eb (t1).The subsidiary markers of Output rusults of three electric energy meters or counter information, download to host computer by data line, host computer compare in real time, thus ensure to do the data that the energy value contrasted is the same time period.As shown in Figure 2, the error only having analog to digital conversion to bring between Ea and Eb.As | Ec-Ea|<0.7%Ea or | during Ec-Eb|<0.7%Eb, show that the continuous data that optical current mutual inductor exports is feasible for electric energy metrical.
The Output rusults of Output rusults and digitalized electric energy metering that technical scheme of the present invention make use of the simulation electric energy metrical of comparatively generally acknowledging at present contrasts.If the difference between optical transformer electric energy metrical Output rusults and standard mutual inductor Electric energy measurement is less than 0.7%, (error simulating electric energy metrical is at present 0.7%, comprise analog current mutual inductor 0.2%, analog voltage mutual inductor 0.2%, cable transmission loss 0.3%), then can verify that optical transformer can be applicable to electric energy metrical completely.
Fig. 3 is the second preferred structure schematic diagram of verification platform of the present invention, and also can be understood as is the preferred structure schematic diagram of optical voltage transformer electric energy metrical verification platform.This verification platform comprises the standard potential transformer gathering the information of voltage that power source exports, gather the standard current transformer of the current information that power source exports and gather the optical voltage transformer to be measured of the information of voltage that power source exports, also comprise simulation electric power meter, a/d conversion device, first merge cells, first digitalized electric energy measuring apparatus, second merge cells, second digitalized electric energy measuring apparatus and host computer, a/d conversion device comprises the first a/d conversion device and the second a/d conversion device, the output terminal connecting analog electric power meter of standard current transformer and the input end of the first a/d conversion device, the output terminal connecting analog electric power meter of standard potential transformer and the input end of the second a/d conversion device, first a/d conversion device is all connected the input end of the first merge cells with the output terminal of the second a/d conversion device, the output terminal of the first merge cells connects the first digitalized electric energy measuring apparatus, the output terminal of optical current mutual inductor and the first a/d conversion device all connects the input end of the second merge cells, the output terminal of the second merge cells connects the second digitalized electric energy measuring apparatus, simulation electric power meter, first digitalized electric energy measuring apparatus is all connected with host computer with the second digitalized electric energy measuring apparatus.
The electric energy metrical checking carrying out optical voltage transformer embodiment illustrated in fig. 3, optical current mutual inductor is replaced with optical voltage transformer by basis embodiment illustrated in fig. 2, and the output of the second a/d conversion device shown in Fig. 2 is sent into the second merge cells and replace with the second merge cells is sent in the output of the first a/d conversion device.Optical voltage transformer gathers information of voltage output digital voltage value Ud and sends into the second merge cells by transmission cable; Standard current transformer gathers current information and exports simulation small area analysis signal Ia, converts digital current values Ib to, send into the second merge cells by the first a/d conversion device; Digital voltage value Ud and digital current values Ib is carried out framing by the second merge cells, is sent to the second digitalized electric energy measuring apparatus according to standard agreement, the second digitalized electric energy measuring apparatus display energy value Ec.As | Ec-Ea|<0.7%Ea or | during Ec-Eb|<0.7%Eb, show that the continuous data that optical voltage transformer exports is feasible for electric energy metrical.Thus the feasibility of the full optics solution of electric energy metrical can be verified.
When being carried out the electric energy metrical checking of optical voltage transformer by optical transformer electric energy metrical verification platform of the present invention, also can be applied to the feasibility of electric energy metrical by the third preferred structure checking optical voltage transformer shown in Fig. 4.This embodiment is on the basis of structure shown in Fig. 2, add the optical voltage transformer to be measured gathering the information of voltage that power source exports, and the 3rd merge cells be connected with optical voltage transformer successively and the 3rd digitalized electric energy measuring apparatus, the output terminal of optical current mutual inductor also connects the input end of the 3rd merge cells, and the 3rd digitalized electric energy measuring apparatus is connected with host computer.It is based on this optical current mutual inductor, verify optical voltage transformer further after verifying optical current mutual inductor that the program can be understood as.Optical voltage transformer gathers information of voltage and exports digital voltage value Ud3 by optical cable feeding the 3rd merge cells; Optical current mutual inductor gathers current information and exports digital current values Ic by transmission cable feeding the 3rd merge cells; Digital voltage value Ud3 and digital current values Ic is carried out framing by the 3rd merge cells, is sent to the 3rd digitalized electric energy measuring apparatus according to standard agreement, the 3rd digitalized electric energy measuring apparatus display energy value Ed.Synchronous in order to ensure data sampling, the first merge cells, the second merge cells and the 3rd merge cells are all connected gps clock module with the PPS pps pulse per second signal receiving gps clock module and send or B coded signal.The subsidiary markers of Output rusults of four electric energy meters (simulation electric power meter, the first digitalized electric energy measuring apparatus, the second digitalized electric energy measuring apparatus and the 3rd digitalized electric energy measuring apparatus) or counter information, download to host computer by data line, host computer compares in real time.As | Ed-Ea|<0.7%Ea or | during Ed-Eb|<0.7%Eb, show that the continuous data that optical current, voltage transformer (VT) export is feasible for electric energy metrical.Thus the feasibility of the full optics solution of electric energy metrical can be verified.
In like manner, shown in Fig. 5, the 4th kind of preferred structure can be understood as is based on this optical voltage transformer, verify optical current mutual inductor further after verifying optical voltage transformer.This embodiment is on the basis of structure shown in Fig. 3, add the optical current mutual inductor to be measured gathering the current information that power source exports, and the 4th merge cells be connected with optical current mutual inductor successively and the 4th digitalized electric energy measuring apparatus, the output terminal of optical voltage transformer also connects the input end of the 4th merge cells, and the 4th digitalized electric energy measuring apparatus is connected with host computer.Optical current mutual inductor gathers current information and exports digital current values Ic by optical cable feeding the 4th merge cells; Optical voltage transformer gathers information of voltage and exports digital voltage value Ud by transmission cable feeding the 4th merge cells; Digital current values Ic and digital voltage value Ud is carried out framing by the 4th merge cells, is sent to the 4th digitalized electric energy measuring apparatus according to standard agreement, the 4th digitalized electric energy measuring apparatus display energy value Ed.Synchronous in order to ensure data sampling, the first merge cells, the second merge cells and the 4th merge cells are all connected gps clock module with the PPS pps pulse per second signal receiving gps clock module and send or B coded signal.The subsidiary markers of Output rusults of four electric energy meters (simulation electric power meter, the first digitalized electric energy measuring apparatus, the second digitalized electric energy measuring apparatus and the 4th digitalized electric energy measuring apparatus) or counter information, download to host computer by data line, host computer compares in real time.As | Ed-Ea|<0.7%Ea or | during Ed-Eb|<0.7%Eb, show that the continuous data that optical voltage, current transformer export is feasible for electric energy metrical.Thus the feasibility of the full optics solution of electric energy metrical can be verified.
The invention still further relates to a kind of optical transformer electric energy metrical verification method, the method is corresponding with above-mentioned optical transformer electric energy metrical verification platform, and also can be understood as is the implementation method of optical transformer electric energy metrical verification platform.The method exports simulation small voltage signal and simulation small area analysis signal after gathering the information of voltage of power source and current information by standard potential transformer and standard current transformer respectively, by simulation small voltage signal with simulate small area analysis signal and export simulation electric power meter to; Simulate small voltage signal and simulation small area analysis signal all carries out AD conversion by a/d conversion device thus is converted to digital voltage value and digital current values respectively simultaneously, by the first merge cells digital voltage value and digital current values carried out framing and be sent to the first digitalized electric energy measuring apparatus according to standard agreement; Digital value is exported after optical transformer to be measured being gathered the corresponding information of power source, the digital voltage value that the digital value exported with optical transformer this digital value and a/d conversion device exported by the second merge cells matches or digital current values carry out framing, and are sent to the second digitalized electric energy measuring apparatus according to standard agreement; Then three energy values of simulation electric power meter, the first digitalized electric energy measuring apparatus and the second digitalized electric energy measuring apparatus are received respectively by host computer, and compare in real time, judge that whether the continuous data that optical transformer to be measured exports is feasible for electric energy metrical by error calculation.The concrete scheme of optical transformer electric energy metrical verification method of the present invention can with reference to shown in figure 2-Fig. 5.
As shown in Figure 2, when optical transformer to be measured is optical current mutual inductor, the digital current values that optical current mutual inductor exports after gathering the current information of power source output and the digital voltage value that a/d conversion device exports all enter the second merge cells, by the second merge cells, digital current values and digital voltage value are carried out framing, and being sent to the second digitalized electric energy measuring apparatus according to standard agreement, by error calculation, host computer judges that whether the continuous data that this optical current mutual inductor exports is feasible for electric energy metrical.As shown in Figure 3, when optical transformer to be measured is optical voltage transformer, the digital voltage value that optical voltage transformer exports after gathering the information of voltage of power source output and the digital current values that a/d conversion device exports all enter the second merge cells, by the second merge cells, digital voltage value and digital current values are carried out framing, and being sent to the second digitalized electric energy measuring apparatus according to standard agreement, by error calculation, host computer judges that whether the continuous data that this optical voltage transformer exports is feasible for electric energy metrical.Preferably, the first merge cells and the second merge cells can be set and all receive the data syn-chronization that pps pulse per second signal that gps clock sends or B coded signal make standard current transformer and standard potential transformer and optical current mutual inductor to be measured or optical voltage transformer.Based on this optical current mutual inductor, optical voltage transformer can also be verified further, scheme as shown in Figure 4 after verifying optical current mutual inductor.In like manner, based on this optical voltage transformer, optical current mutual inductor can also be verified further after verifying optical voltage transformer, scheme as shown in Figure 5.
Optical transformer electric energy metrical verification method of the present invention make use of the modulating output result of the recognized standard voltage transformer (VT) and standard current transformer and digital output results and coordinates the digitized electric energy metrical Output rusults of optical transformer to be measured to compare, if the error between the electric energy metrical Output rusults of optical transformer and standard mutual inductor Electric energy measurement is less than 0.7% (simulating the error of electric energy metrical at present), then can verify that optical transformer can be applicable to electric energy metrical completely.The accurate validation of optical transformer electric energy metrical can be completed by verification method of the present invention, solve the problem that current optical transformer lacks checking in electric energy metrical uses.
It should be pointed out that the above embodiment can make the invention of those skilled in the art's comprehend, but do not limit the present invention in any way creation.Therefore; although this instructions has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can modify to the invention or equivalent replacement; in a word, all do not depart from technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (10)
1. an optical transformer electric energy metrical verification platform, it is characterized in that, comprise the standard potential transformer gathering the information of voltage that power source exports, gather the standard current transformer of the current information that power source exports and gather the optical transformer to be measured of power source output information, also comprise simulation electric power meter, a/d conversion device, first merge cells, first digitalized electric energy measuring apparatus, second merge cells, second digitalized electric energy measuring apparatus and host computer, the equal connecting analog electric power meter of output terminal of described standard potential transformer and standard current transformer and the input end of a/d conversion device, the described input end of the first merge cells is connected with the output terminal of a/d conversion device, the output terminal of described first merge cells connects the first digitalized electric energy measuring apparatus, the output terminal of described optical transformer and a/d conversion device all connects the input end of the second merge cells, the output terminal of described second merge cells connects the second digitalized electric energy measuring apparatus, described simulation electric power meter, first digitalized electric energy measuring apparatus is all connected with host computer with the second digitalized electric energy measuring apparatus.
2. optical transformer electric energy metrical verification platform according to claim 1, it is characterized in that, described optical transformer is the optical current mutual inductor gathering the current information that power source exports, described a/d conversion device comprises the first a/d conversion device and the second a/d conversion device, the output terminal of described standard current transformer connects the input end of the first a/d conversion device, the output terminal of standard potential transformer connects the input end of the second a/d conversion device, described first a/d conversion device is all connected the input end of the first merge cells with the output terminal of the second a/d conversion device, the output terminal of described second a/d conversion device also connects the input end of the second merge cells.
3. optical transformer electric energy metrical verification platform according to claim 1, it is characterized in that, described optical transformer is the optical voltage transformer gathering the information of voltage that power source exports, described a/d conversion device comprises the first a/d conversion device and the second a/d conversion device, the output terminal of described standard current transformer connects the input end of the first a/d conversion device, the output terminal of standard potential transformer connects the input end of the second a/d conversion device, described first a/d conversion device is all connected the input end of the first merge cells with the output terminal of the second a/d conversion device, the output terminal of described first a/d conversion device also connects the input end of the second merge cells.
4. optical transformer electric energy metrical verification platform according to claim 2, it is characterized in that, also comprise the optical voltage transformer to be measured gathering the information of voltage that power source exports, and the 3rd merge cells be connected with optical voltage transformer successively and the 3rd digitalized electric energy measuring apparatus, the output terminal of described optical current mutual inductor also connects the input end of the 3rd merge cells, and described 3rd digitalized electric energy measuring apparatus is connected with host computer.
5. optical transformer electric energy metrical verification platform according to claim 3, it is characterized in that, also comprise the optical current mutual inductor to be measured gathering the current information that power source exports, and the 4th merge cells be connected with optical current mutual inductor successively and the 4th digitalized electric energy measuring apparatus, the output terminal of described optical voltage transformer also connects the input end of the 4th merge cells, and described 4th digitalized electric energy measuring apparatus is connected with host computer.
6. optical transformer electric energy metrical verification platform according to claim 1, it is characterized in that, also comprise gps clock module, described first merge cells and the second merge cells are all connected gps clock module with the pps pulse per second signal receiving gps clock module and send or B coded signal.
7. optical transformer electric energy metrical verification platform according to claim 4, it is characterized in that, also comprise gps clock module, described first merge cells, the second merge cells and the 3rd merge cells are all connected gps clock module with the pps pulse per second signal receiving gps clock module and send or B coded signal.
8. optical transformer electric energy metrical verification platform according to claim 5, it is characterized in that, also comprise gps clock module, described first merge cells, the second merge cells and the 4th merge cells are all connected gps clock module with the pps pulse per second signal receiving gps clock module and send or B coded signal.
9. an optical transformer electric energy metrical verification method, it is characterized in that, simulation small voltage signal and simulation small area analysis signal is exported respectively, by simulation small voltage signal with simulate small area analysis signal and export simulation electric power meter to after gathering the information of voltage of power source and current information by standard potential transformer and standard current transformer; Simulate small voltage signal and simulation small area analysis signal all carries out AD conversion by a/d conversion device thus is converted to digital voltage value and digital current values respectively simultaneously, by the first merge cells digital voltage value and digital current values carried out framing and be sent to the first digitalized electric energy measuring apparatus according to standard agreement; Digital value is exported after optical transformer to be measured being gathered the corresponding information of power source, the digital voltage value that the digital value exported with optical transformer this digital value and a/d conversion device exported by the second merge cells matches or digital current values carry out framing, and are sent to the second digitalized electric energy measuring apparatus according to standard agreement; Then three energy values of simulation electric power meter, the first digitalized electric energy measuring apparatus and the second digitalized electric energy measuring apparatus are received respectively by host computer, and compare in real time, judge that whether the continuous data that optical transformer to be measured exports is feasible for electric energy metrical by error calculation.
10. optical transformer electric energy metrical verification method according to claim 9, it is characterized in that, when optical transformer to be measured is optical current mutual inductor, the digital voltage value that output digital current values after optical current mutual inductor gathers the current information of power source output and a/d conversion device export all enters the second merge cells, by the second merge cells, digital current values and digital voltage value are carried out framing, and be sent to the second digitalized electric energy measuring apparatus according to standard agreement, by error calculation, host computer judges that whether the continuous data that this optical current mutual inductor exports is feasible for electric energy metrical,
When optical transformer to be measured is optical voltage transformer, the digital voltage value that optical voltage transformer exports after gathering the information of voltage of power source output and the digital current values that a/d conversion device exports all enter the second merge cells, by the second merge cells, digital voltage value and digital current values are carried out framing, and being sent to the second digitalized electric energy measuring apparatus according to standard agreement, by error calculation, host computer judges that whether the continuous data that this optical voltage transformer exports is feasible for electric energy metrical;
First merge cells and the second merge cells all receive the data syn-chronization that pps pulse per second signal that gps clock sends or B coded signal make standard current transformer and standard potential transformer and optical transformer to be measured.
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