CN102819004A - Comprehensive detecting and analyzing platform for performance of digital electric energy metering systems of intelligent transformer substations - Google Patents
Comprehensive detecting and analyzing platform for performance of digital electric energy metering systems of intelligent transformer substations Download PDFInfo
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Abstract
A comprehensive detecting and analyzing platform for performance of digital electric energy metering systems of intelligent transformer substations is provided with a detecting system and a background expert system. The detecting system comprises an electronic transformer detecting system, a digital/digital-value-input electric energy meter detecting system and a digital electric energy metering comprehensive performance detecting system. By the background expert system, real-time monitoring and value tracing can be simultaneously carried out for electronic/optical current transformers, electronic voltage transformers, digital/digital-value-input electric energy meters and the like, and electric energy data of analog systems and multiple digital systems can be compared and analyzed so that the comprehensive performance of each digital electric energy metering system is detected. Detection results are comprehensive owing to multiple signal acquisition channels and comprehensive consideration on metering risk points of the systems, and the comprehensive detecting and analyzing platform is beneficial to improving metering accuracy for the intelligent transformer substations and digital transformer substations, and provides a good technical support for constructing the intelligent transformer substations and the digital transformer substations.
Description
Technical field
The invention belongs to Power System Intelligent transformer station Measuring and testing technical field; What relate to is that a kind of intelligent substation digitalized electric energy metering system detects and analytical technology, is specially a kind of intelligent substation digitalized electric energy metering system performance synthesis and detects and analysis platform.
Background technology
Intelligent substation is an indispensable important component part during intelligent grid is built; At present; The development of intelligent substation and digital transformer substation has entered into the large tracts of land practical applications stage; Electronic mutual inductor, merge cells and intelligent cell, digital quantity input electric energy meter has also begun in the electric system large-area applications, and digitalized electric energy metering system is also set up completion, and the detection of digitizing metering can not be simply detects according to the transmission of analog quantity.
The risk point that digitizing metering possibly have influence on the measuring system precision mainly contains following several respects, the influence of the electronic mutual inductor current transformer of different principle, electronic type voltage transformer, digital link, environment, power factor and synchronous etc.Yet the digitalized electric energy metrology applications is also fewer in the world; So research that also metering is not traced to the source and detected aspects such as compare of analysis about digitalized electric energy at present; Though domestic construction and application at digitizing and intelligent substation gone on along in international prostatitis; But the laboratory detection range in the digitizing metering still rests on according to the electronic mutual inductor of traditional analog amount measuring system foundation and the off-line monomer detection-phase of digital quantity input electric energy meter at present; Be electronic mutual inductor detection, digitalized electrical energy meter detection etc.; And the amount of influence of the digitizing measuring system that we should be concerned about set foot in basically less than, comprehensive compare of analysis system for field has also had some metering comparisons, mainly is that the result who is embodied in digitized metering system and conventional metered dose system compares.So trace to the source detection check and performance synthesis analysis also do not set up at present for the integral body of digitizing metering system; Can't embody the real error point of digitizing metering; And all metrology and measurement processes are uncontrollable, and this has brought great hidden danger just for the metering of intelligent substation digitalized electric energy.
The metering system of conventional substation is to be combined by subset one by one; Its know-why is ripe; The metering risk point is also within controlled range, but whether digitized metering system satisfies the accuracy requirement of metering in the synchronism of humiture characteristic, electric current and the voltage of error point analysis, electronic mutual inductor at present, the unusual aspects such as influence to the accuracy of measuring of digital link also do not have answer.This has become in the process of tracing to the source, also the have no way of problem that solves of present digitizing metering, becomes the biggest obstacle that restriction intelligent substation and digital transformer substation develop.And all now digitizings metering all is to adopt the monomer of off-line to detect and analytical approach; Its essence all is discrete detection and the analysis that the analog or digital standard source comes digital quantity is carried out partition type, can't satisfy the requirement that integral body is traced to the source and performance synthesis is analyzed of our digitizing metering system at all.
So from present present situation; Pressing for a kind of detection and performance evaluation platform comes the digitizing metering system is carried out the real-time performance detection and analyzes; Integration test to the digitizing measuring system; The intelligent substation digitalized electric energy metering system performance synthesis that promptly merges the real-time synthetic of multiple factors such as various principle electronic mutual inductors, digitizing/digital quantity input electric energy meter, digitizing link detects and analysis platform; And can trace to the source according to the traceability system of simulation simultaneously, satisfy our traditional metering system of tracing to the source and also can solve the risk point problem of digitizing metering for the requirement of metering.
Summary of the invention
Technical purpose of the present invention is the deficiency that overcomes prior art; Build the intelligent substation digitalized electric energy metering system detection platform of real-time online, extensively the electronic mutual inductor and the digital/metering outfits such as digital quantity input electric energy meter of employing are carried out the analysis of equipment performance and the detection etc. of tracing to the source of electric energy to be primarily aimed at intelligent substation.
Technical scheme of the present invention is:
A kind of intelligent substation digitalized electric energy metering system performance synthesis detects and analysis platform, it is characterized in that be provided with detection system and backstage expert system, said detection system comprises:
A), electronic mutual inductor detection system;
The electronic type voltage transformer to be measured, electronic current mutual inductor or the optical current mutual inductor that are connected with power lead are sent to backstage expert system according to the IEC61850 stipulations through the networking with the electricity data that collect separately;
Adopt two-way data acquisition module and Devices to test synchronous acquisition power lead in the electronic transducer calibration instrument through the electric current behind the standard mutual inductor, voltage data is as reference and transfer to the backstage expert system; The message data of the IEC61850 that in the expert system of backstage, sends with Devices to test compares; Accomplish detections of tracing to the source of the error of electronic mutual inductor to be measured by the computing module in the expert system of backstage, and the result of the detection of tracing to the source is carried out analytic statistics through the backstage expert system;
B), digital/digital quantity input electric energy meter detection system;
Said electronic type voltage transformer, electronic current mutual inductor and optical current mutual inductor to digital/digital quantity input electric energy meter transmission to be measured, carry out the calculating of electric flux with the data that collect in electric energy meter;
With a mock standard electric energy meter and a simulation electric energy meter series connection, gather the electric current and the voltage data of power lead simultaneously, and carry out the calculating of electric flux; The mock standard electric energy meter is as tracing to the source standard; To be measured digital/the digital quantity electric energy meter all sends reflection to the mock standard electric energy meter with the simulation electric energy meter, and it records the pulse of electric energy value separately; In the mock standard electric energy meter, accomplish the error analysis of electric energy meter to be measured and the detection of tracing to the source of electric energy, and the result who detects that traces to the source is carried out statistical study through the backstage expert system;
C), digitalized electric energy metering combination property detection system;
Said simulation electric energy meter is sent to the backstage expert system through protocol converter with energy data;
Adopt the multipath synchronous data in the digitalized electrical energy meter tester to gather voltage, current data after modular converter is gathered power lead process standard mutual inductor; This multipath synchronous data is gathered modular converter and above-mentioned simulation electric energy meter synchronous acquisition; Said multipath synchronous data is gathered modular converter and is exported the data of its collection to independent digital/digital quantity input electric energy meter, carries out the calculating of electric flux and result of calculation is transferred to the backstage expert system;
Digital/digital quantity input the electric energy meter that receives the electronic mutual inductor output data simultaneously also transfers to the backstage expert system with the electric energy value of its calculating;
Metering result to above-mentioned several roads analog or digital electric flux in the expert system of backstage implements real-time, long-term data comparative analysis.
Further technical scheme comprises:
In order to protect measuring equipment or acquisition module; When gathering current value; Be provided with standard current transformer in said two-way data acquisition module and the circuit that power lead is connected, primary current is through getting into the two-way data acquisition module as the standard source after the conversion of standard current transformer; When gathering magnitude of voltage, be provided with inductive voltage divider in said two-way data acquisition module and the circuit that power lead is connected, primary voltage passes through after the conversion of inductive voltage divider as standard source entering two-way data acquisition module;
The data that said multipath synchronous data collection modular converter is gathered also are the output valve after primary current or primary voltage process standard current transformer or the inductive voltage divider conversion.
Said mock standard electric energy meter receives electric current and primary voltage through the output after the standard current transformer conversion with the simulation electric energy meter, carries out the calculating of electric flux.
The data of said electronic type voltage transformer to be measured, electronic current mutual inductor or optical current mutual inductor collection transfer to the backstage expert system through merge cells, the merge cells that electronic current mutual inductor is corresponding different with optical current mutual inductor.
Said electronic mutual inductor detection system also is provided with the synchronisation source device; The collection moment of two-way data acquisition module is regulated in specified time-delay automatically according to the mutual inductor that reads or set; Send synchronizing pulse through the synchronisation source device to said two-way data acquisition module and merge cells MU, with the meter digital zero clearing of merge cells MU and trigger said two-way data acquisition module BOB(beginning of block) image data simultaneously.
Said merge cells MU is sent to corresponding SMV message controller with data, and this message controller is imported electric energy meter through switch with data transmission to digital/digital quantity corresponding with it; Said multipath synchronous data is gathered modular converter with data transmission to the SMV message controller corresponding with it, and this message controller is imported electric energy meter through switch with data transmission to digital/digital quantity corresponding with it;
Said backstage expert system is provided with the message control system of the above-mentioned SMV message controller operation of control; Unusual and the packet loss of SMV message is set as required, accomplish the field network message unusual with loss condition under digital/digital quantity import the analysis of electric energy meter metering performance.
Consider that environmental factor and vibrations are to the mutual inductor Effect on Performance; Platform of the present invention also is provided with the acquisition module of gathering environmental factor and mutual inductor vibration data parameter; With the analysis of carrying out the electronic mutual inductor performance in data transmission to the backstage expert system of gathering; The error that consideration possibly exist, said environmental factor comprises temperature, humidity etc.Simultaneously, can test the luminous power of input end and the output terminal interface of said merge cells MU through light power meter, the sampled value mode of connection of/digital quantity input electric energy meter digital through changing is carried out the dependence test test of network service etc.
Said two-way data acquisition module can adopt the pin-point accuracy two-way data acquisition module of existing electronic transducer calibration instrument; Said multipath synchronous data is gathered modular converter and also can be adopted the pin-point accuracy multipath synchronous data of existing digitalized electrical energy meter tester to gather modular converter; The class of accuracy of said electronic transducer calibration instrument and digitalized electrical energy meter tester should be more than 0.05 grade, and said pin-point accuracy two-way data acquisition module and pin-point accuracy multipath synchronous data are gathered the modular converter limits of error and required to be controlled in 0.05%.
Power end adopts up-flow/stepup transformer to accomplish required voltage and electric current, and the phase angle relationship that phase shifter is controlled up-flow and boosted is set.Can
Beneficial effect of the present invention:
The present invention is through the backstage expert system; Can be to the metering outfit of intelligent substation; Carry out real-time monitoring and magnitude tracing simultaneously like electronic type/optical current mutual inductor, electronic type voltage transformer and digitizing/digital quantity input electric energy meter etc.; And can and analog quantity system and the comparative analysis of between multi-path digital amount system, implementing electric energy data, the combination property of accomplishing the digital quantity electric energy metered system detects.Through the multiline message acquisition channel; Take all factors into consideration the metering risk point of system; Make testing result more comprehensive with comprehensively, help to improve the accuracy of intelligent substation and digital transformer substation metering, for intelligent substation and digital transformer substation construction provide the good technical guarantee.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the invention.
Embodiment
In order to illustrate technical scheme of the present invention and technique effect, the present invention is done further introduction below in conjunction with accompanying drawing and embodiment.
Intelligent substation digitalized electric energy metering system performance synthesis of the present invention detects with analysis platform and is provided with detection system and the backstage expert system of analyzing data; As shown in Figure 1, (be clear signal, gather electric current and gather separately signal of voltage; But two power lead is real is the homology line); Power source voltage, the output of current signal one road direction Devices to test, the checkout equipment output of another road direction platform, said detection system comprises:
A), electronic mutual inductor detection system;
Said mutual inductor comprises current transformer (CT) and voltage transformer (VT) (PT).The electronic type voltage transformer to be measured, electronic current mutual inductor and the optical current mutual inductor that are connected with power lead; The electricity data that collect are separately transferred to SMV message controller through merge cells (MU) respectively; Corresponding first merge cells of said electronic current mutual inductor, corresponding second merge cells of optical current mutual inductor.
Utilize the existing pin-point accuracy two-way of electronic transducer calibration instrument equipment data collecting module collected current signal; Electronic transducer calibration instrument is connected with power lead through a route road; Primary current is through the standard CT conversion; Its output valve gets into the two-way data acquisition module as the standard source; Primary voltage is through the inductive voltage divider conversion, and its output valve gets into the two-way data acquisition module as the standard source, and said two-way data acquisition module transfers to electric current, the voltage signal gathered in the expert system of backstage through total switch.
This system also is provided with the synchronisation source device, and the collection moment of two-way data acquisition module is regulated in specified time-delay automatically based on the electronic mutual inductor that reads or set.The synchronisation source device sends synchronizing pulse to the data acquisition module of said electronic transducer calibration instrument and merge cells, with the meter digital zero clearing of merge cells and trigger the collection of said data acquisition module BOB(beginning of block) simultaneously.The synchronizing pulse rising edge is designated as zero constantly constantly; Merge cells is synchronized the back and sends target data when having; Counter is the data that zero data can regard for zero moment as; The backstage expert system comes out to calculate with data extract, and calculates comparison with the data of two-way data collecting module collected, so just can accurately try to achieve differing and experimental datas such as ratio that mutual inductor produces.
B), digital/digital quantity input electric energy meter detection system;
Be the protection instrument; Said digital electricity meter tester is identical with electronic transducer calibration instrument; What gather is through the electric current and the output voltage of inductive voltage divider after the standard CT conversion, can draw through the conversion of conversion proportion be connected to simulate electric energy meter the current/voltage value as reference.
In carrying out the testing process of tracing to the source of electric energy; Digital/digital quantity input electric energy meter to be measured sends the energy value of data acquisition and calculation separately through the form of pulse to the mock standard electric energy meter respectively with the simulation electric energy meter; And with the mock standard electric energy meter as the standard of tracing to the source; In the mock standard electric energy meter, accomplish the detection of tracing to the source of error analysis and electric energy, and the result who detects that traces to the source is carried out statistical study through the backstage expert system.
Power end adopts up-flow/stepup transformer to accomplish required voltage and electric current, and the phase angle relationship that phase shifter is controlled up-flow and boosted is set.。
C), digitalized electric energy metering combination property detection system
Digital/digital quantity input electric energy meter to be measured has digital electric meter 1#, digital electric meter 2# and digital electric meter 3#; Digital electric meter 1#, digital electric meter 2# receive the data of electronic type CT and optical ct and the data of electronic type PT respectively; Carry out the calculating of electric energy value, and energy value is transferred to the backstage expert system through switch.
High-precision mock standard electric energy meter is set transforms after-current and primary voltage data through another circuit collection through standard CT with the simulation electric energy meter; And carry out the calculating of electric flux; The mock standard electric energy meter is connected with the simulation electric energy meter in the line, and the simulation electric energy meter is sent to the backstage expert system through protocol converter and total switch with energy data.
Simultaneously; The pin-point accuracy multipath synchronous data of existing digital electric energy meter tester capable of using is gathered the modular converter synchronous acquisition and is connected to electric current and the magnitude of voltage of gathering the simulation electric energy meter; And export image data to SMW message controller according to the IEC1850-9-2 stipulations; Export data to several ammeter 3# through switch, digital electric meter 3# transfers to the backstage expert system through total switch with the energy value of calculating again.
The backstage expert system is accomplished the real-time comparative analysis of electric energy data between digital quantity and analog quantity system through above multipath input data.
The backstage expert system is provided with the message control system (not shown) of the above-mentioned SMV message controller of control operation, and said SMV message controller sends message according to the requirement of last message control system, through total switch with data transmission to backstage expert system.
The sampled value mode of connection that changes digital/digital quantity input electric energy meter can be carried out the dependence test experiment of network service.
Platform also is provided with the acquisition module of gathering environmental factor and vibration data parameter; With carrying out extraneous factor in data transmission to the backstage expert system of gathering to the influence of the influence of equipment performance and performance variation to the image data accuracy, comprehensive in the hope of the accuracy of platform Monitoring Data and analytic process.
Electronic transducer calibration instrument and digitalized electrical energy meter tester for pin-point accuracy in the industry cycle also do not have clear and definite tier definition at present; General in the present invention requirement should be more than 0.05 grade, and its data acquisition module limits of error should be controlled in 0.05%.
Show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the instructions just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (10)
1. intelligent substation digitalized electric energy metering system performance synthesis detects and analysis platform, it is characterized in that be provided with detection system and backstage expert system, said detection system comprises:
A), electronic mutual inductor detection system;
The electronic type voltage transformer to be measured, electronic current mutual inductor or the optical current mutual inductor that are connected with power lead are sent to backstage expert system according to the IEC61850 stipulations through the networking with the electricity data that collect separately;
Adopt two-way data acquisition module and Devices to test synchronous acquisition power lead in the electronic transducer calibration instrument through the electric current behind the standard mutual inductor, voltage data is as reference and transfer to the backstage expert system; The message data of the IEC61850 that in the expert system of backstage, sends with Devices to test compares; Accomplish detections of tracing to the source of the error of electronic mutual inductor to be measured by the computing module in the expert system of backstage, and the result of the detection of tracing to the source is carried out analytic statistics through the backstage expert system;
B), digital/digital quantity input electric energy meter detection system;
Said electronic type voltage transformer, electronic current mutual inductor or optical current mutual inductor to digital/digital quantity input electric energy meter transmission to be measured, carry out the calculating of electric flux with the data that collect in electric energy meter;
With a mock standard electric energy meter and a simulation electric energy meter series connection, gather the electric current and the voltage data of power lead simultaneously, and carry out the calculating of electric flux; The mock standard electric energy meter is as tracing to the source standard; Digital/digital quantity electric energy meter all sends reflection to the mock standard electric energy meter with the simulation electric energy meter, and it records the pulse of electric energy value separately; In the mock standard electric energy meter, accomplish the error analysis of electric energy meter to be measured and the detection of tracing to the source of electric energy, and the result who detects that traces to the source is carried out statistical study through the backstage expert system;
C), digitalized electric energy metering combination property detection system;
Said simulation electric energy meter is sent to the backstage expert system through protocol converter with energy data;
Adopt the multipath synchronous data in the digitalized electrical energy meter tester to gather voltage, current data after modular converter is gathered power lead process standard mutual inductor; This multipath synchronous data is gathered modular converter and above-mentioned simulation electric energy meter synchronous acquisition; Said multipath synchronous data is gathered modular converter and is exported the data of its collection to independent digital/digital quantity input electric energy meter, carries out the calculating of electric flux and result of calculation is transferred to the backstage expert system;
Digital/digital quantity input the electric energy meter that receives the electronic mutual inductor output data simultaneously also transfers to the backstage expert system with the electric energy value of its calculating;
Metering result to above-mentioned several roads analog or digital electric flux in the expert system of backstage implements real-time, long-term data comparative analysis.
2. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 1 detects and analysis platform, it is characterized in that:
When gathering current value, be provided with standard current transformer in said two-way data acquisition module and the circuit that power lead is connected, primary current passes through after the conversion of standard current transformer as standard source entering two-way data acquisition module;
When gathering magnitude of voltage, be provided with inductive voltage divider in said two-way data acquisition module and the circuit that power lead is connected, primary voltage passes through after the conversion of inductive voltage divider as standard source entering two-way data acquisition module;
The data that said multipath synchronous data collection modular converter is gathered also are the output valve after primary current or primary voltage process standard current transformer or the inductive voltage divider conversion.
3. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 2 detects and analysis platform, it is characterized in that:
Said mock standard electric energy meter receives electric current and primary voltage through the output after the standard current transformer conversion with the simulation electric energy meter, carries out the calculating of electric flux.
4. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 2 detects and analysis platform, it is characterized in that:
The data of said electronic type voltage transformer to be measured, electronic current mutual inductor or optical current mutual inductor collection transfer to the backstage expert system through merge cells, the merge cells that electronic current mutual inductor is corresponding different respectively with optical current mutual inductor.
5. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 4 detects and analysis platform, it is characterized in that:
Said electronic mutual inductor detection system also is provided with the synchronisation source device; The collection moment of two-way data acquisition module is regulated in specified time-delay automatically according to the mutual inductor that reads or set; Send synchronizing pulse through the synchronisation source device to said two-way data acquisition module and merge cells, with the meter digital zero clearing of merge cells and trigger said two-way data acquisition module BOB(beginning of block) image data simultaneously.
6. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 4 detects and analysis platform, it is characterized in that:
Said merge cells is sent to corresponding SMV message controller with data, and this message controller is imported electric energy meter through switch with data transmission to digital/digital quantity corresponding with it;
Said multipath synchronous data is gathered modular converter with data transmission to the SMV message controller corresponding with it, and this message controller is imported electric energy meter through switch with data transmission to digital/digital quantity corresponding with it;
Said backstage expert system is provided with the message control system of the above-mentioned SMV message controller operation of control; Unusual and the packet loss of SMV message is set as required, accomplish the field network message unusual with loss condition under digital/digital quantity import the analysis of electric energy meter metering performance.
7. detect and analysis platform according to the described a kind of intelligent substation digitalized electric energy metering system performance synthesis of arbitrary claim among the claim 1-6, it is characterized in that:
Be provided with the acquisition module of gathering environmental factor and mutual inductor vibration data parameter, with the analysis of carrying out the electronic mutual inductor metering performance in data transmission to the backstage expert system of gathering.
8. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 7 detects and analysis platform, it is characterized in that:
Test the luminous power of input end and the output terminal interface of said merge cells MU through light power meter;
The sampled value mode of connection of/digital quantity input electric energy meter digital through changing is carried out the dependence test experiment of network service.
9. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 8 detects and analysis platform, it is characterized in that:
The class of accuracy of said electronic transducer calibration instrument and digitalized electrical energy meter tester should be more than 0.05 grade, and said two-way data acquisition module and multipath synchronous data are gathered the modular converter limits of error and be controlled in 0.05%.
10. a kind of intelligent substation digitalized electric energy metering system performance synthesis according to claim 7 detects and analysis platform, it is characterized in that:
Power end adopts up-flow/stepup transformer to accomplish required voltage and current, and the phase angle relationship that phase shifter is controlled up-flow and boosted is set.
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