CN103336264B - Digital electric energy meter quantity value tracing system based on analog quantity detection and digital electric energy meter quantity value tracing method based analog quantity detection - Google Patents
Digital electric energy meter quantity value tracing system based on analog quantity detection and digital electric energy meter quantity value tracing method based analog quantity detection Download PDFInfo
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Abstract
The invention relates to a complete digital electric energy meter quantity value tracing system based on analog quantity detection and a digital electric energy meter quantity value tracing method based the analog quantity detection. The digital electric energy meter quantity value tracing system based on the analog quantity detection includes an analog electric energy device, an analog standard electric energy meter, an analog standard power meter, a voltage and current conversion message module, a standard power calculation and standard electric energy generation module, and three error calculation modules; the voltage and current conversion message module samples voltage and current parameters of the analog electric energy device, and transmits an IEC61850 message under sequential logic control; and the standard power calculation and standard electric energy generation module samples the content of the IEC61850 message, computes the power of the IEC61850 message real time, and generates electric energy, and performs display and pulse output. With the digital electric energy meter quantity value tracing system based on the analog quantity detection of the invention adopted, quantity values of digital electric energy meters can be traced back to analog quantity measurement standards through an improved method, and the technical problem of difficult tracing of the digital quantity of the digital electric energy meters can be solved, and an improved solution is provided for the tracing of the quantity values of the digital electric energy meters.
Description
Technical field
The digitalized electrical energy meter magnitude tracing system and method that the present invention relates to a kind of completion and detect based on analog quantity, for the magnitude tracing of digitalized electrical energy meter in intelligent substation or the electric parameter calibration of other intelligent secondary devices, belong to intelligent grid instrument and equipment field tests.
Background technology
Along with the technology such as intelligent switch, electronic current voltage mutual inductor, the detection of operational outfit presence, a substation operation training on operation emulation reaches its maturity, the application of IEC61850 agreement and the Application and Development of computing machine express network in real-time system, the intelligent substation of the collection of all information in transformer station, transmission and process total digitalization will become the inexorable trend that in electric system, the automation of transformation substations is built.
The formulation of a series of intelligent substation of State Grid Corporation of China and Automation Technology of Digitized Transformer standard indicates that the construction of intelligent substation moves towards the engineering practice stage by the scientific research stage.The Q/GDW439-2009 " intelligent substation fire protection technology " of State Grid Corporation of China also issues, and wherein electronic mutual inductor, intelligent switch, intelligent electronic device, digitized protection, digitalized electrical energy meter are widely applied.
Traditional mutual inductor its export as 100V or
and 5A or 1A, and the output of Electrical Instrument Transducers with Digital signal is the digital frame following IEC61850 standard agreement, the input of digitalized electrical energy meter or other intelligent secondary device is also digital signal, therefore traditional electric energy meter checking device or other traditional test device cannot be tested the specification of carrying out of digitalized electrical energy meter or other intelligent secondary device accurately, the performance of digitalized electrical energy meter or other intelligent secondary device cannot be ensured accurately and reliably, thus have impact on intelligent substation entirety and build and safety in operation and reliability.
At present also be in the trial period both at home and abroad for digitalized electrical energy meter, Its Relevant Technology Standards is not also formulated and is issued, domestic correlative study unit it is also proposed multiple digitalized electrical energy meter magnitude tracing detection method, but all imperfection is also lack of standardization, fail to solve its root problem of tracing to the source, mainly there is following problem:
1) the metering value of digitalized electrical energy meter can not be traced to the source to analog quantity standard;
2) metering accuracy of digitalized electrical energy meter can not obtain accurate quantification;
3) detection of tracing to the source of digitalized electrical energy meter does not also have complete set of system to carry out detection of tracing to the source, and the accurate measurement performance of this whole system can't be carried out detection quantification imperfectly and be evaluated.
Summary of the invention
The present invention is directed to above-mentioned digitalized electrical energy meter magnitude tracing and detect the technological deficiency existed, carry out technological innovation, the digitalized electrical energy meter magnitude tracing system and method proposing a kind of completion and detect based on analog quantity, the technical barrier that the digital quantity overcoming digitalized electrical energy meter is not easily traced to the source.
Technical scheme of the present invention is:
Based on the digitalized electrical energy meter magnitude tracing system that analog quantity detects, it is characterized in that: comprising: simulation electrical energy devices, mock standard electric energy meter, mock standard power meter, Voltage to current transducer message module, calibration power calculate and standard power generation module, 3 error calculating module;
Simulate voltage, the current parameter of electrical energy devices described in described Voltage to current transducer message module samples, and under time series stereodata, carry out the transmission of IEC61850 message, the magnitude tracing for digitalized electrical energy meter detects and provides digitized power source; The IEC61850 message content that described calibration power calculating and the Voltage to current transducer message module described in the sampling of standard power generation module send, employing canonical algorithm calculating realtime power, and real-time generating electric energy, carry out display and pulse exports.
The standard electric energy meter device be made up of described simulation electrical energy devices, mock standard electric energy meter and the second error calculating module, detects described Voltage to current transducer message module and calibration power calculates and the error of the entirety of standard power generation module composition is set to E1.
The calibration power meter apparatus be made up of described simulation electrical energy devices, mock standard power meter and the 3rd error calculating module, detects described Voltage to current transducer message module and calibration power calculates and the error of the entirety of standard power generation module Plays power computing section composition is set to E2.
The error E 3 that error E 2 obtains standard electric energy computing module is deducted by error E 1, and by this control errors in a setting range.
By described simulation electrical energy devices, Voltage to current transducer message module, calibration power calculating and standard power generation module and the first error calculating module, detect tested digitalized electrical energy meter, obtain the error of digitalized electrical energy meter.
First complete Voltage to current transducer message module and calibration power in this system to calculate and standard power generation module is traced to the source to analog quantity measurement standard and mock standard electric energy meter, then complete Voltage to current transducer message module in this system to trace to the source to analog quantity measurement standard and mock standard power meter, thus obtain the result that calibration power calculates and standard power generation module is traced to the source to analog quantity system, as this result of tracing to the source meets basic demand, can using calibration power calculate and standard power generation module as standard, carry out digitalized electrical energy meter to trace to the source detection, thus realize digitalized electrical energy meter and trace to the source and detect to a whole set of complete process of tracing to the source of analog quantity measurement standard.
Based on the digitalized electrical energy meter magnitude tracing method that analog quantity detects, it is characterized in that: comprise following steps:
Voltage, the current parameter of Voltage to current transducer message module samples simulation electrical energy devices, and under time series stereodata, carry out the transmission of IEC61850 message, the magnitude tracing for digitalized electrical energy meter detects and provides digitized power source; The IEC61850 message content that calibration power calculating and the Voltage to current transducer message module described in the sampling of standard power generation module send, adopts canonical algorithm to calculate realtime power, and real-time generating electric energy;
Form standard electric energy meter device by simulation electrical energy devices, mock standard electric energy meter and the second error calculating module, the error detecting the entirety that Voltage to current transducer message module, calibration power calculating and standard power generation module form is set to E1;
Form calibration power meter apparatus by described simulation electrical energy devices, mock standard power meter, the 3rd error calculating module again, the error detecting the entirety that described Voltage to current transducer message module, the calculating of described calibration power and standard power generation module Plays power computing section form is set to E2;
The error E 3 that error E 2 obtains the calculating of described calibration power and standard power generation module Plays energy calculate module is deducted, by this control errors in a setting range by error E 1;
Finally by described simulation electrical energy devices, Voltage to current transducer message module, calibration power calculating and standard power generation module and the first error calculating module, detect tested digitalized electrical energy meter, obtain the error of tested described digitalized electrical energy meter.
Error E 3 setting range of described standard electric energy computing module is for being less than 0.05%.
With simulation electrical energy devices, Voltage to current transducer message module, calibration power calculates and standard power generation module and error calculating module, when detecting tested digitalized electrical energy meter, now simulate electrical energy devices, Voltage to current transducer message module only act as the function of message generating means, now be actually and adopt calibration power calculating and standard power generation module to detect digitalized electrical energy meter, because error E 3 obtains for E2 deducts E1 in real work, E3 may be less, but due to the grade of errors 0.2 grade of the error of digitalized electrical energy meter traditionally digitalized electrical energy meter under present condition, therefore this error is only less than 0.05%, magnitude tracing work can be completed.
The beneficial effect that the present invention reaches:
The invention provides a kind of digitalized electrical energy meter magnitude tracing method of completion, the value of digitalized electrical energy meter can be traceable to by perfect method in analog quantity measurement standard, the technical barrier that the digital quantity overcoming digitalized electrical energy meter is not easily traced to the source, for digitalized electrical energy meter magnitude tracing provides perfect solution.
Accompanying drawing explanation
Fig. 1 is digitalized electrical energy meter traceability system one-piece construction figure;
Fig. 2 is that in traceability system, digitalized electrical energy meter is traced to the source device wiring diagram;
Fig. 3 is that digitalized electrical energy meter is traced to the source the inner principle assumption diagram of device.
Embodiment
As depicted in figs. 1 and 2, completion of the present invention and the digitalized electrical energy meter magnitude tracing system detected based on analog quantity, comprise simulation electrical energy devices, mock standard electric energy meter, mock standard power meter, Voltage to current transducer message module, calibration power calculates and standard power generation module, 3 error calculating module.Wherein, simulation electrical energy devices, mock standard electric energy meter is identical with traditional electric energy meter device structure with the second error calculating module, and mock standard power meter, the error calculating module of other two error calculating module also with traditional are consistent.Wherein, to be calculated by Voltage to current transducer message module, calibration power and standard power generation module and the first error calculating module form digitalized electrical energy meter and to trace to the source device; Standard electric energy meter device is formed by simulation electrical energy devices, mock standard electric energy meter and the second error calculating module; Calibration power meter apparatus is formed by simulation electrical energy devices, mock standard power meter and the 3rd error calculating module (also claiming power error computing module).
In digitalized electrical energy meter traceability system, host CPU adopts the MPC8247 embedded microprocessor of Freescale company as shown in Figure 3, this processor belongs to PowerQUICC II series, comprises a kernel based on PowerPC MPC603e and a communication process kernel CPM.Double-core design has powerful processing power and higher integrated level, reduces the composition expense of system, simplifies the design of circuit board, reduce power consumption.
FPGA adopts the Spartan series of products XC3S1000 of Xilinx, based on the accurate capability of sequential control of FPGA, completes the control of AD sampling, the task that the transmission of network data etc. have requirement strict to the time.
Analog to digital converter adopts the ADS1271 of Burr-Broun company to gather signal as analog to digital converter, this ADC is 24,50KHz bandwidth, the offset drift of 1.8uV/ ° of C, up to the signal to noise ratio (S/N ratio) of 109dB, achieve the breakthrough combination of DC precision and AC performance.
Ethernet controller is Intel Company LXT971.LXT971 is the quick ether controller of single port 10/100M double speed, its compatible IEEE802.3; Support 10Base5,10Base2,10BaseT, 100BASE-X, 100BASE-TX, 100BASE-FX, and can automatically detect connected medium, select Agilent AFBR5803 as fiber optic network transceiver.
Application software based on the exploitation of vxworks operating system, the real-time of vxworks good reliability and brilliance be widely used in communicate, military affairs, the high-quality precision and sophisticated technology such as Aeronautics and Astronautics and the high field of requirement of real-time.
After device research and development debugging that all kinds of conventional apparatus is debugged and digitalized electrical energy meter is traced to the source completes, testing process of tracing to the source is divided into three phases to carry out.
1, digitalized electrical energy meter is traced to the source device global error detection-phase
The standard electric energy meter device be made up of simulation electrical energy devices, mock standard electric energy meter and the second error calculating module, the digitalized electrical energy meter detecting research and development is traced to the source the global error of device, namely Voltage to current transducer message module error, calibration power calculate and standard power generation module error composition entirety, measuring error is E1.
2, digitalized electrical energy meter is traced to the source Voltage to current transducer and power computation module error-detecting stage in device
The calibration power meter apparatus be made up of simulation electrical energy devices, mock standard power meter and the 3rd error calculating module (i.e. power error computing module), detect trace to the source Voltage to current transducer message module in device, calibration power of digitalized electrical energy meter to calculate and the entirety of standard power generation module Plays power computing section composition, measuring error is E2.
3, the digitalized electrical energy meter error-detecting stage
This one-phase utilizes and deducts E2 by E1 and obtain digitalized electrical energy meter and to trace to the source the error E 3 of the standard electric energy computing module in device after sampled I EC61850 message; Error E 3 like this controls in a setting range, as being less than 0.05%, simulation electrical energy devices and Voltage to current transducer message module finally can be used as power source, digitalized electrical energy meter trace to the source calibration power in device calculate and standard power generation module as standard, calculate tested digitalized electrical energy meter and the error of this standard by the first error calculating module, thus obtain the metrical error of digitalized electrical energy meter.
Claims (4)
1. based on the digitalized electrical energy meter magnitude tracing system that analog quantity detects, it is characterized in that: comprising: simulation electrical energy devices, mock standard electric energy meter, mock standard power meter, Voltage to current transducer message module, calibration power calculate and standard power generation module, 3 error calculating module;
Simulate voltage, the current parameter of electrical energy devices described in described Voltage to current transducer message module samples, and under time series stereodata, carry out the transmission of IEC61850 message, the magnitude tracing for digitalized electrical energy meter detects and provides digitized power source; The IEC61850 message content that described calibration power calculating and the Voltage to current transducer message module described in the sampling of standard power generation module send, employing canonical algorithm calculating realtime power, and real-time generating electric energy, carry out display and pulse exports;
The standard electric energy meter device be made up of described simulation electrical energy devices, mock standard electric energy meter and the second error calculating module, detects described Voltage to current transducer message module and calibration power calculates and the error of the entirety of standard power generation module composition is set to E1;
The calibration power meter apparatus be made up of described simulation electrical energy devices, mock standard power meter and the 3rd error calculating module, detects described Voltage to current transducer message module and calibration power calculates and the error of the entirety of standard power generation module Plays power computing section composition is set to E2;
The error E 3 that error E 2 obtains standard electric energy computing module is deducted by error E 1, and by this control errors in a setting range;
By described simulation electrical energy devices, Voltage to current transducer message module, calibration power calculating and standard power generation module and the first error calculating module, detect tested digitalized electrical energy meter, obtain the error of digitalized electrical energy meter.
2., based on the digitalized electrical energy meter magnitude tracing method that analog quantity detects, it is characterized in that: comprise following steps:
Voltage, the current parameter of Voltage to current transducer message module samples simulation electrical energy devices, and under time series stereodata, carry out the transmission of IEC61850 message, the magnitude tracing for digitalized electrical energy meter detects and provides digitized power source; The IEC61850 message content that calibration power calculating and the Voltage to current transducer message module described in the sampling of standard power generation module send, adopts canonical algorithm to calculate realtime power, and real-time generating electric energy;
Form standard electric energy meter device by simulation electrical energy devices, mock standard electric energy meter and the second error calculating module, the error detecting the entirety that Voltage to current transducer message module, calibration power calculating and standard power generation module form is set to E1;
Form calibration power meter apparatus by described simulation electrical energy devices, mock standard power meter, the 3rd error calculating module again, the error detecting the entirety that described Voltage to current transducer message module, the calculating of described calibration power and standard power generation module Plays power computing section form is set to E2;
The error E 3 that error E 2 obtains the calculating of described calibration power and standard power generation module Plays energy calculate module is deducted, by this control errors in a setting range by error E 1;
Finally by described simulation electrical energy devices, Voltage to current transducer message module, calibration power calculating and standard power generation module and the first error calculating module, detect tested digitalized electrical energy meter, obtain the error of tested described digitalized electrical energy meter.
3. a kind of digitalized electrical energy meter magnitude tracing method detected based on analog quantity according to claim 2, is characterized in that: error E 3 setting range of described standard electric energy computing module is for being less than 0.05%.
4. a kind of digitalized electrical energy meter magnitude tracing method detected based on analog quantity according to claim 2, it is characterized in that: by described simulation electrical energy devices, Voltage to current transducer message module, calibration power calculating and standard power generation module and the first error calculating module, when detecting tested described digitalized electrical energy meter, now described simulation electrical energy devices, Voltage to current transducer message module serve as message generating means, are calculated and standard power generation module detects described digitalized electrical energy meter by described calibration power.
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