CN105866576A - Simulation detection system of intelligent transformer station secondary-side electric energy metering error influence, and detection analysis method - Google Patents
Simulation detection system of intelligent transformer station secondary-side electric energy metering error influence, and detection analysis method Download PDFInfo
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- CN105866576A CN105866576A CN201610204078.4A CN201610204078A CN105866576A CN 105866576 A CN105866576 A CN 105866576A CN 201610204078 A CN201610204078 A CN 201610204078A CN 105866576 A CN105866576 A CN 105866576A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention provides a simulation detection system of an intelligent transformer station secondary-side electric energy metering error influence, and a detection analysis method. The system comprises a merging unit detection apparatus provided with a GPS or Beidou module and a GPS module, a standard electric energy meter is connected with the merging unit detection apparatus, output signals of a voltage merging unit and a current merging unit, after being converted by a switch, are output to a digital electric energy meter and are compared with output values of the standard electric energy meter, and at the same time, output values of the voltage merging unit and the current merging unit are subjected to error comparison with the merging unit detection apparatus through a digital signal analyzer. According to the invention, simulation platform detection can be carried out in an experiment room, detection analysis conclusion inaccuracy caused by too many onsite detection related factors and complex implementation is avoided, and main influence factors causing metering errors in a detected area can be rapidly and accurately detected.
Description
Technical field
The present invention relates to electric energy metrical field, be specifically related to the simulation inspection of a kind of intelligent substation secondary side electric energy metering error impact
Examining system and detection method thereof.
Background technology
Combining unit is the equipment rising with intelligent substation and occurring, current Intelligent Substation System builds and mainly includes
Several parts such as key-course, process layer, wall, process layer is responsible for transmitting the signal such as analog quantity, switching value, tripping operation, and
Combining unit is one of nucleus equipment of transformer station process layer, and the secondary side data-interface with electronic mutual inductor connects respectively
Connect, and the data-interface of protection measuring and controlling equipment connects, and adopts the synchronization of the analog quantitys such as transformer station's electric current and voltage in order to realizing
Collection and merging treatment.
The Intelligent transformer station that major part is built at present is constituted intelligent change by simulating input combining unit with digitalized electrical energy meter
Power station secondary side electric energy metered system, voltage combining unit, electric current combining unit performance are the keys affecting electric energy metering error
Factor.Site Detection is analyzed due to, enforcement complexity many by the influence factor being surveyed scene, is difficult to meet job demand, and each
The power grid environment situation on ground is different, and the major influence factors of electric energy metering error also can be different, such as, have combining unit number
According to processing that transmission delay, message packet loss, message error code, message shake, voltage x current harmonic wave, clock be asynchronous, clock not
Accurate etc..But owing to lacking effective error influence amount analytical equipment and method at present so that on-the-spot operation produced problem cannot
Have been resolved.Therefore, it is highly desirable to research and develop and a kind of intelligent becomes in secondary side electric energy metrical, can be on error in dipping impact
Laboratory is simulated system and this detection method of detection.
Summary of the invention
To be solved by this invention be above-mentioned in technical problem, it is provided that a kind of avoid suffered by in-site measurement various factors impact,
Can be simulated in laboratory conditions measuring, accurately obtain the intelligent power transformation of the major influence factors of surveyed area meterin error
The simulation detection system of secondary side electric energy metering error of standing impact.
And then ground, the present invention also provides for the detection method of above-mentioned simulation detection system.
The simulation detection system of intelligent substation secondary side electric energy metering error impact, it is characterised in that including:
Combining unit detection device, this device connects independent GPS or a Big Dipper module, and is provided with corresponding GPS second pulse and sends out
Raw device and B code decoder, output AC electric current, voltage signal；
Standard electric energy meter, its voltage input circuit and electric current input circuit are respectively connected to the voltage-mode of described combining unit detection device
Analog quantity outfan and current-mode analog quantity outfan；
Voltage combining unit, is provided with voltage output loop and voltage digital signal output part, is respectively used to described combining unit
The voltage analog of detection device output carries out loop output and digitized analog output；
Electric current combining unit, is provided with electric current output loop and current digital signal output part, is respectively used to through standard electric energy meter
The electric current of output carries out loop output and digitized analog output again；
Switch, for receiving voltage combining unit and the output signal of electric current combining unit respectively and changing；
Digitalized electrical energy meter, the digital signal after receiving electric current combining unit and the conversion of voltage combining unit, and by its electric energy
Pulse output end accesses in described standard electric energy meter accordingly, by with standard electric energy meter comparison, it is achieved electric energy error comparison；
Digital signal analyzer, respectively with voltage digital signal output port, the electricity of electric current combining unit of voltage combining unit
Streaming digital signal output port correspondence connects, for receiving the output digital quantity of voltage combining unit and electric current combining unit
Value.
Described combining unit detection device is mounted on GPRS communication module with digital signal analyzer, corresponding by wireless access
Network, it is achieved wireless data transmission, described digital signal analyzer is additionally provided with B code input interface.
Described standard electric energy meter is three-phase alternating current standard electric energy meter, its class of accuracy be 0.02 grade or more than.
In described combining unit detection device, it is additionally provided with standard clock source, by standard clock source output and GPS second impulsive synchronization
Alternating current, voltage signal.
Use the determination method of the simulation detection system of intelligent substation secondary side electric energy metering error impact, including as follows
Step:
1), combining unit detection device in, the voltage analog Tong Bu with clock, be respectively connected to voltage combining unit and standard
The corresponding input of electric energy meter；
2), combining unit detection device in, through clock synchronize current-mode analog quantity, serial access standard electric energy meter correspondence defeated
Entering end, the electric current output loop of standard electric energy meter accesses the corresponding input of electric current combining unit；
3), digitalized electrical energy meter respectively correspondence access voltage combining unit and electric current combining unit converted after digital signal,
The electrical energy pulse outfan of digitalized electrical energy meter accesses in described standard electric energy meter accordingly, the voltage digital of voltage combining unit
Signal output part, the voltage digital signal output part of electric current combining unit are respectively connected to digital signal analyzer；
4), with gps time or Big Dipper time as standard, the independent comparison and detection of electric energy metering error and global error inspection are carried out
The accuracy detection surveyed, and record data；
5), analyze, comparison 4) in each error affect value, show that main electric energy metering error mainly affects project；
6), complete detection, disconnect combining unit detection device, disconnect each connection.
Described step 4) in, error independent comparison and detection project includes, standard electric energy meter contrasts with the error of digitalized electrical energy meter
Detection；Digital signal analyzer receives voltage combining unit, electric current combining unit output digital quantity value and combining unit detection dress
Put voltage, current output magnitude error comparison and detection.
Described step 4) in, global error detection project includes, voltage, electric current combining unit amplitude error, and voltage merges single
Unit, electric current combining unit produce phase angle difference error, electric current combining unit quadratic interpolation, and voltage combining unit, electric current merge single
The time-delay deviation of unit.
The simulation detection system of the intelligent substation secondary side electric energy metering error impact of the present invention, can be simulated in the lab
Detection of platform, it is to avoid because Site Detection relates to that factor is too many, implement detection that is complicated and that cause and analyze conclusion inaccurate, logical
Cross the independent comparison of each variable error and overall comparison, surveyed region can be recorded quickly and accurately and cause the master of error in dipping
Want influence factor.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is further described.
The simulation detection system of the intelligent substation secondary side electric energy metering error impact of the present embodiment, can be located at the indoor such as laboratory
Detection environment, under the interference of each improper factor avoiding Site Detection, relatively accurately detects, analyzes region
The major influence factors place of error in dipping.
The simulation detection system of the present embodiment, power supply is the merging list for exporting three-phase alternating current analog quantity and voltage analog
Element detection apparatus.Combining unit detection device connects GPS module and GPRS wireless communication device, and GPS module is built-in with GPS
Second pulse generator；The device of combining unit detection simultaneously is built-in with standard clock source, three-phase test power supply input combining unit inspection
Survey the power supply signal in device loop, need to export after standard clock source with GPS second impulsive synchronization, make in simulation detection system each
Clock apparatus or the time set of device synchronize in time, combining unit detection device current-mode after output clock synchronizes
While analog quantity and voltage analog, measure and record current output valve and voltage output value.
In the simulation detection system of the present embodiment, it is provided with the three-phase alternating current standard electric energy meter that accuracy class is 0.02 or above, its
Voltage input circuit and electric current input circuit, concatenated voltage analog outfan and the electric current of combining unit detection device respectively
Analog output end.
Voltage combining unit and electric current combining unit, both is provided with corresponding output loop and for transmitting place combining unit
The digitized signal outfan of output data.In voltage combining unit, its voltage input end has accessed the inspection of above-mentioned combining unit
Survey the voltage analog outlet line after clock synchronizes of device；In electric current combining unit, its current input terminal has accessed warp
The current output terminal of three-phase alternating current standard electric energy meter, makes the energy value that three-phase alternating current standard electric energy meter exports, in follow-up process
In, differentiation comparison accurately can be formed with the energy value of digitalized electrical energy meter.Voltage combining unit and electric current combining unit,
Be converted to be suitable to the digital signal that digitalized electrical energy meter accesses to the output signal of the two through switch respectively.Digitalized electrical energy meter
After access, carrying out electric energy transmission, meanwhile, electrical energy pulse outfan accesses in described standard electric energy meter accordingly, by with standard
Electric energy meter comparison, it is achieved electric energy error comparison.In another part, voltage combining unit and electric current combining unit, the number of the two
Word signal output part is connected to digital signal analyzer respectively, by digital signal analyzer, to voltage combining unit and electricity
The corresponding output value of stream combining unit carries out showing and measuring.Digital signal analyzer also connects GPRS module, merges
Single element detection apparatus and the record data of digital signal analyzer, can be wirelessly transmitted to detailed calculating center, and then can realize
To combining unit detection device measured by and record corresponding output valve carry out every differentiation comparison.
Use the determination method of the simulation detection system of intelligent substation secondary side electric energy metering error impact, its detecting step
As follows:
1), combining unit detection device in, the voltage analog Tong Bu with clock, be respectively connected to voltage combining unit and standard
The corresponding input of electric energy meter；
2), combining unit detection device in, through clock synchronize current-mode analog quantity, serial access standard electric energy meter correspondence defeated
Entering end, the electric current output loop of standard electric energy meter accesses the corresponding input of electric current combining unit；
3), digitalized electrical energy meter respectively correspondence access voltage combining unit and electric current combining unit converted after digital signal,
The electrical energy pulse outfan of digitalized electrical energy meter accesses in described standard electric energy meter accordingly, the voltage digital of voltage combining unit
Signal output part, the voltage digital signal output part of electric current combining unit are respectively connected to digital signal analyzer；
4), with gps time or Big Dipper time as standard, the independent comparison and detection of electric energy metering error and global error inspection are carried out
The accuracy detection surveyed, and record data；Wherein, independent comparison and detection is the error of standard electric energy meter and digitalized electrical energy meter
Comparison and detection；Digital signal analyzer receives voltage combining unit, electric current combining unit output digital quantity value is examined with combining unit
Survey device voltage, current output magnitude error comparison and detection；Global error detection project is, voltage, electric current combining unit width
Value error, voltage combining unit, electric current combining unit produce phase angle difference error, electric current combining unit quadratic interpolation, voltage conjunction
And unit, the time-delay deviation of electric current combining unit；
5), analyze, comparison 4) in each error affect value, show that main electric energy metering error mainly affects project；
6), complete detection, disconnect combining unit detection device, disconnect each connection.
The above only have expressed the preferred embodiment of the present invention, and it describes more concrete and detailed, but can not therefore manage
Solve as the restriction to the scope of the claims of the present invention.It should be pointed out that, for the person of ordinary skill of the art, do not taking off
On the premise of present inventive concept, it is also possible to make some deformation, improve and substitute, these broadly fall into the protection model of the present invention
Enclose.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. the simulation detection system of intelligent substation secondary side electric energy metering error impact, it is characterised in that including:
Combining unit detection device, this device connects independent GPS or a Big Dipper module, and is provided with corresponding GPS second pulse and sends out
Raw device and B code decoder, output AC electric current, voltage signal；
Standard electric energy meter, its voltage input circuit and electric current input circuit are respectively connected to the voltage-mode of described combining unit detection device
Analog quantity outfan and current-mode analog quantity outfan；
Voltage combining unit, is provided with voltage output loop and voltage digital signal output part, is respectively used to described combining unit
The voltage analog of detection device output carries out loop output and digitized analog output；
Electric current combining unit, is provided with electric current output loop and current digital signal output part, is respectively used to through standard electric energy meter
The electric current of output carries out loop output and digitized analog output again；
Switch, for receiving voltage combining unit and the output signal of electric current combining unit respectively and changing；
Digitalized electrical energy meter, the digital signal after receiving electric current combining unit and the conversion of voltage combining unit, and by its electric energy
Pulse output end accesses in described standard electric energy meter accordingly, by with standard electric energy meter comparison, it is achieved electric energy error comparison；
Digital signal analyzer, respectively with voltage digital signal output port, the electricity of electric current combining unit of voltage combining unit
Streaming digital signal output port correspondence connects, for receiving the output digital quantity of voltage combining unit and electric current combining unit
Value.
The simulation detection system of intelligent substation secondary side the most according to claim 1 electric energy metering error impact, its feature
Being, described combining unit detection device is mounted on GPRS communication module with digital signal analyzer, passes through wireless access
Corresponding network, it is achieved wireless data transmission, described digital signal analyzer is additionally provided with B code input interface.
The simulation detection system of intelligent substation secondary side the most according to claim 1 electric energy metering error impact, its feature
Being, described standard electric energy meter is three-phase alternating current standard electric energy meter, its class of accuracy be 0.02 grade or more than.
The simulation detection system of intelligent substation secondary side the most according to claim 1 electric energy metering error impact, it is special
Levy and be, in described combining unit detection device, be additionally provided with standard clock source, by standard clock source output and GPS second arteries and veins
The alternating current of punching synchronization, voltage signal.
5. the simulation detection system using the impact of intelligent substation secondary side as claimed in claim 1 electric energy metering error
Determination method, comprises the steps:
1), combining unit detection device in, the voltage analog Tong Bu with clock, be respectively connected to voltage combining unit and standard
The corresponding input of electric energy meter；
2), combining unit detection device in, through clock synchronize current-mode analog quantity, serial access standard electric energy meter correspondence defeated
Entering end, the electric current output loop of standard electric energy meter accesses the corresponding input of electric current combining unit；
3), digitalized electrical energy meter respectively correspondence access voltage combining unit and electric current combining unit converted after digital signal,
The electrical energy pulse outfan of digitalized electrical energy meter accesses in described standard electric energy meter accordingly, the voltage digital of voltage combining unit
Signal output part, the voltage digital signal output part of electric current combining unit are respectively connected to digital signal analyzer；
4), with gps time or Big Dipper time as standard, the independent comparison and detection of electric energy metering error and global error inspection are carried out
The accuracy detection surveyed, and record data；
5), analyze, comparison 4) in each error affect value, show that main electric energy metering error mainly affects project；
6), complete detection, disconnect combining unit detection device, disconnect each connection.
The detection side of the simulation detection system of intelligent substation secondary side the most according to claim 5 electric energy metering error impact
Method, it is characterised in that described step 4) in, error independent comparison and detection project includes, standard electric energy meter and digitized electricity
The error comparison and detection of energy table；Digital signal analyzer receive voltage combining unit, electric current combining unit output digital quantity value with
Combining unit detection device voltage, current output magnitude error comparison and detection.
The detection side of the simulation detection system of intelligent substation secondary side the most according to claim 5 electric energy metering error impact
Method, it is characterised in that described step 4) in, global error detection project includes, voltage, electric current combining unit amplitude are by mistake
Difference, voltage combining unit, electric current combining unit produce phase angle difference error, electric current combining unit quadratic interpolation, voltage merging list
Unit, the time-delay deviation of electric current combining unit.
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| CN107748346A (en) * | 2017-10-11 | 2018-03-02 | 国网江西省电力公司电力科学研究院 | A kind of high voltage electric energy error detection method under load containing DC component |
| CN108616321A (en) * | 2018-04-28 | 2018-10-02 | 广州供电局有限公司 | Clock synchronizing method, device, computer equipment and the storage medium of electric energy meter |
| CN109298705A (en) * | 2018-10-22 | 2019-02-01 | 国网江西省电力有限公司电力科学研究院 | A kind of digitlization measure and control device off-line checking system and method based on combining unit |
| CN110850354A (en) * | 2019-09-26 | 2020-02-28 | 广州供电局有限公司 | Metering fault recognition module detection method, device, system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110850354A (en) * | 2019-09-26 | 2020-02-28 | 广州供电局有限公司 | Metering fault recognition module detection method, device, system and storage medium |
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