CN103513223A - Electric energy meter communication interface load capacity test system - Google Patents
Electric energy meter communication interface load capacity test system Download PDFInfo
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- CN103513223A CN103513223A CN201310481249.4A CN201310481249A CN103513223A CN 103513223 A CN103513223 A CN 103513223A CN 201310481249 A CN201310481249 A CN 201310481249A CN 103513223 A CN103513223 A CN 103513223A
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Abstract
The invention provides an electric energy meter communication interface load capacity test system which comprises an alternating current-direct current test power supply, a communication module, a ripple test module, a direct current voltage detection module, a direct current detection module, a load switching control module, a test load and a host computer. The alternating current-direct current test power supply powers the test system and an electric energy meter through a power supply interface at the same time. The communication module, the ripple test module, the direct current voltage detection module, the direct current detection module, the load switching control module and the test load are respectively bidirectionally connected with the host computer. The ripple test module, the direct current voltage detection module, the direct current detection module, the load switching control module and the test load respectively communicate with the electric energy meter through a communication interface of the communication module. According to the invention, the test complexity is considered; by using communication connection, electrical connection and test connection, different test equipment and tested equipment are associated; and the test requirements of relevant standards are considered, so that the test system has advancement and module adaptability.
Description
Technical field
The present invention relates to a kind of method of testing, specifically relate to a kind of electric energy meter communication interface load capacity test macro.
Background technology
At present, China is carrying out the construction of power information acquisition system, power information acquisition system is comprised of main website, acquisition terminal and ammeter etc., because system scale is large, domestic each terminal producer communication module, communication protocol Dou Shiyou producer self-developing, separate operation between each equipment, electric energy meter is corresponding one by one with communication unit, the power requirement of electric energy meter, band carry and require is communication unit customization and the optimization process for mated, so originally not high to power supply quality and power drives Capability Requirement.
Nowadays require electric energy meter to match with multiple communication unit, realize between communication unit and electric energy meter and interconnecting, but various communication units exist larger otherness, thereby the interchangeability between each devices in system and communication exist many obstacles, restricted to a great extent the promotion and application of acquisition system, therefore the power supply quality of electric energy meter and adaptive load ability have been proposed to requirements at the higher level.
Wherein, the communication mode of electric energy meter mainly contains low-voltage powerline carrier communication and micro power radio communication, and each communication mode of electric energy meter all has corresponding communication module, and electric energy meter disposes communication interface can carry out data interaction with communication module.In order to guarantee that these communication modules can reliably working, must guarantee that electric energy meter communication interface possesses certain load capacity, also to guarantee that electric energy meter carries the communication efficiency that can not produce strong jamming down and affect communication module at band simultaneously, therefore must measure power supply output and the load capacity of electric energy meter, comprise the measurement of electric power output voltage, output current, output ripple.
Summary of the invention
For solving the problem of communication module data communication reliability in the construction of power information acquisition system and operational process, guarantee that electric energy meter communication interface possesses certain load capacity function, according to Q/GDW1355-2013 " single-phase intelligent electric energy meter pattern standard ", Q/GDW1356-2013 " three-phase intelligent electric-energy meter pattern standard ", Q/GDW1364-2013 " single-phase intelligent electric energy meter technical manual ", Q/GDW1827-2013 " three-phase intelligent electric-energy meter technical manual ", proposed to provide a kind of electric energy meter communication interface load capacity test macro, to evaluate the working effect of electric energy meter communication unit, the load capacity of assessment electric energy meter communication unit.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of electric energy meter communication interface load capacity test macro, described system comprises alternating current-direct current testing power supply, communication module, ripple test module, DC voltage detection module, direct current detection module, load switching controls module, test load and host computer; Described alternating current-direct current testing power supply is powered to test macro and electric energy meter by power interface simultaneously, described communication module, ripple test module, DC voltage detection module, direct current detection module, load switching controls module and test load are connected with host computer is two-way respectively, and described ripple test module, DC voltage detection module, direct current detection module, load switching controls module and test load communicate by communication interface and the electric energy meter of communication module respectively.
Described alternating current-direct current testing power supply is program control alternating current-direct current testing power supply, meets overvoltage under site environment or the generation of undervoltage condition, and described alternating current-direct current testing power supply comprises communication power supply and DC test power supply.
Described communication module comprises communication interface and power interface, and described power interface comprises AC power interface and direct supply interface.
Described ripple test module comprises low-frequency ac voltage component samples unit, data processing unit and result identifying unit, described low-frequency ac voltage component samples unit gathers the low-frequency ac component voltage value of described DC test power supply, and the low-frequency ac component voltage value of collection is sent to data processing unit; Described data processing unit receives low-frequency ac component voltage value, calculates the ripple peak-to-peak value in Different sampling period and carries out revision of the convention processing, finally revision of the convention result is transferred to described result identifying unit; Described result identifying unit judges whether the ripple of DC test power supply meets the demands.
Described DC voltage detection module scanning and measure the magnitude of voltage of described DC test power supply, coordinates load switching controls module to complete the voltage measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
Described direct current detection module scanning and measure the current value of described DC test power supply, coordinates load switching controls module to complete the current measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
The incision of described host computer by load switching controls module controls test load, cut out, charge capacity and sequential.
Described test load comprises linear load and momentary load, and described linear load adopts metalfilmresistor, and described momentary load adopts electronic load.
Described test macro is connected respectively by communication interface, AC power interface and the direct supply interface of communication module and communication interface, AC power interface and the direct supply interface of electric energy meter.
Compared with prior art, beneficial effect of the present invention is:
1. electric energy meter communication interface load capacity method of testing has realized online detection and the analytic function of electric energy meter communication interface load capacity, for testing staff provides intuitive and accurate detection data and figure and integrated detection analysis means, not only be convenient to the analysis of communication process quantitative and qualitative analysis, and can be used for the fault diagnosis of electric energy meter communication, for communication errors location and processing provide effective foundation.By the test of communication interface load capacity, the designing requirement of standard communication unit, further improve security, stability and the reliability of power information transmission, for better meeting actual demand, the quickening of electric power enterprise, advanced power information acquisition system and intelligent grid construction that technical support is provided.
2. this method of testing has taken into full account the complicacy of test, test is divided into the many aspects such as test source, testing apparatus, test control, test load, utilize communication connection, electrical connection and test to connect these different testing apparatuss and equipment under test are associated, and consider the test request of relevant criterion.
3. for solving the problem of electric energy meter communication unit normal operation, provide means of testing, further improved the stability of data communication, the integration of the security of system data, information, the advance of the extensibility of system and software platform.
Accompanying drawing explanation
Fig. 1 is electric energy meter communication interface load capacity test system structure block diagram;
Fig. 2 is electric energy meter communication interface load capacity test system and test procedure chart.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 1, the invention provides a kind of electric energy meter communication interface load capacity test macro, described system comprises alternating current-direct current testing power supply, communication module, ripple test module, DC voltage detection module, direct current detection module, load switching controls module, test load and host computer; Described alternating current-direct current testing power supply is powered to test macro and electric energy meter by power interface simultaneously, described communication module, ripple test module, DC voltage detection module, direct current detection module, load switching controls module and test load are connected with host computer is two-way respectively, and described ripple test module, DC voltage detection module, direct current detection module, load switching controls module and test load communicate by communication interface and the electric energy meter of communication module respectively.
Described alternating current-direct current testing power supply is program control alternating current-direct current testing power supply, meets overvoltage under site environment or the generation of undervoltage condition, and described alternating current-direct current testing power supply comprises communication power supply and DC test power supply.Alternating current-direct current testing power supply is selected alternating current steady voltage plug ALC2000, can program control output 0～300V.
Described communication module comprises communication interface and power interface, and described power interface comprises AC power interface and direct supply interface.
Described ripple test module comprises low-frequency ac voltage component samples unit, data processing unit and result identifying unit; Described low-frequency ac voltage component samples unit gathers the low-frequency ac component voltage value of described DC test power supply, and the low-frequency ac component voltage value of collection is sent to data processing unit; Described data processing unit receives low-frequency ac component voltage value, calculates the ripple peak-to-peak value in Different sampling period and carries out revision of the convention processing, finally revision of the convention result is transferred to described result identifying unit; Described result identifying unit judges whether the ripple of DC test power supply meets the demands.
For ripple test, select comparatively highly sensitive oscillograph to meet test specification requirement, meanwhile, also need to consider that isolation is connected and can reaches measuring accuracy with input.Equally, select and there is high sensitivity frequency spectrograph, Impedance measurement can affect measuring accuracy equally, to input and connect 3dB attenuator connecting test cable again, can solve preferably the resistance matching problem of connection, inner electromagnetic isolation and shielding measure are mutually mutual, and broadband test adopts radio-frequency cable, general test adopts shielded cable, can realize preferably measuring accuracy requirement.
Ripple test module is selected TS2212A programmable oscilloscope, minimum signal amplitude: 2mV/ lattice～10V/ lattice, meet ripple signal testing scope; Having 20MHzBW arranges: meet ripple test requirement; Programmable interface computing machine can reading.
Utilize the built-in high sampling oscilloscope test peak value ripple voltage of test macro, utilize USB interface of computer to read the reading of oscillograph crest voltage, and carry out figure demonstration, provide the combination of numerical value and figure, effectively judge ripple test result.
Described DC voltage detection module scanning and measure the magnitude of voltage of described DC test power supply, coordinates load switching controls module to complete the voltage measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
Described direct current detection module scanning and measure the current value of described DC test power supply, coordinates load switching controls module to complete the current measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
DC voltage detection module and direct current detection module adopt respectively voltage table and reometer, and voltage table and reometer adopt high sampling to receive board NET2801, and 16 bit resolutions meet measuring accuracy requirement, and 250ksps meets test speed requirement.
The incision of described host computer by load switching controls module controls test load, cut out, charge capacity and sequential.
Described test load comprises linear load and momentary load, and described variable load adopts metalfilmresistor, and described momentary load adopts electronic load.Linear load is selected in the load that low speed changes, and can meet standard-required; Electronic load is novel test load device, loading rate fast can be provided, utilize this characteristic of electronic load, can carry out the load variations of artificial antenna public network GPRS communication, come the communication interface of verification terminal that the fan-out capability of burst current can be provided, because the speed of electronic load is very fast, transient current is large again, so be also noted that the cooperation of test duration and control sequential in test, adopt electronic load can solve the test problem of transient load, for the application of acquisition terminal provides more correct applied environment requirement.Electronic load is selected electronic load M9811, can produce 1ms interval 2A output load signal.
As Fig. 2, concrete test process is as follows:
1) ripple test subroutine: read and record ripple data.
2) discrete frequency noise test procedure: storage frequency spectrograph frequency is set, calls Frequency and Amplitude correction tables of data, calculate and recording level data.
3) single-phase source arranges subroutine: table look-up and obtain corresponding code, by serial ports, send code, read source test parameter after delay, judge whether single-phase source parameters is required ac voltage.
4) load incision subroutine: by NET280116 railway digital amount code is set, judgement load incision or disconnection.
5) electric current and voltage test subroutine: read NET2810 analog quantity sampled data, save as voltage value.
Test macro is connected respectively by communication interface, AC power interface and the direct supply interface of communication module and communication interface, AC power interface and the direct supply interface of acquisition terminal.
Advantage of the present invention also comprises:
1, advance
This method of testing adopts high-speed sampling and accurate synchronism detection technology to solve the burst test problem of the dynamic power consumption under many power environments multi-group power, has certain advance.
2, test automation
The robotization that this method of testing adopts the combination of program control technology and computer technology to efficiently solve the robotization control of test process, the robotization processing of test data and resolution chart shows.
3, module adaptive
This method of testing adopts the mode of template standard interface, has and changes the requirement that template realizes disparate modules test.
4, friendly interface intuitive display
Adopt computer interface program design, figure intuitive display, data processing is smooth, reflects measured Changing Pattern.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (9)
1. an electric energy meter communication interface load capacity test macro, is characterized in that: described system comprises alternating current-direct current testing power supply, communication module, ripple test module, DC voltage detection module, direct current detection module, load switching controls module, test load and host computer; Described alternating current-direct current testing power supply is powered to test macro and electric energy meter by power interface simultaneously, described communication module, ripple test module, DC voltage detection module, direct current detection module, load switching controls module and test load are connected with host computer is two-way respectively, and described ripple test module, DC voltage detection module, direct current detection module, load switching controls module and test load communicate by communication interface and the electric energy meter of communication module respectively.
2. electric energy meter communication interface load capacity test macro according to claim 1, it is characterized in that: described alternating current-direct current testing power supply is program control alternating current-direct current testing power supply, meet overvoltage under site environment or the generation of undervoltage condition, described alternating current-direct current testing power supply comprises communication power supply and DC test power supply.
3. electric energy meter communication interface load capacity test macro according to claim 1, is characterized in that: described communication module comprises communication interface and power interface, and described power interface comprises AC power interface and direct supply interface.
4. electric energy meter communication interface load capacity test macro according to claim 1, it is characterized in that: described ripple test module comprises low-frequency ac voltage component samples unit, data processing unit and result identifying unit, described low-frequency ac voltage component samples unit gathers the low-frequency ac component voltage value of described DC test power supply, and the low-frequency ac component voltage value of collection is sent to data processing unit; Described data processing unit receives low-frequency ac component voltage value, calculates the ripple peak-to-peak value in Different sampling period and carries out revision of the convention processing, finally revision of the convention result is transferred to described result identifying unit; Described result identifying unit judges whether the ripple of DC test power supply meets the demands.
5. electric energy meter communication interface load capacity test macro according to claim 1, it is characterized in that: described DC voltage detection module scanning and measure the magnitude of voltage of described DC test power supply, coordinates load switching controls module to complete the voltage measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
6. electric energy meter communication interface load capacity test macro according to claim 1, it is characterized in that: described direct current detection module scanning and measure the current value of described DC test power supply, coordinates load switching controls module to complete the current measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
7. electric energy meter communication interface load capacity test macro according to claim 1, is characterized in that: the incision of described host computer by load switching controls module controls test load, cut out, charge capacity and sequential.
8. electric energy meter communication interface load capacity test macro according to claim 1, is characterized in that: described test load comprises linear load and momentary load, and described linear load adopts metalfilmresistor, and described momentary load adopts electronic load.
9. electric energy meter communication interface load capacity test macro according to claim 1, is characterized in that: described test macro is connected respectively by communication interface, AC power interface and the direct supply interface of communication module and communication interface, AC power interface and the direct supply interface of electric energy meter.
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| CN104391267A (en) * | 2014-11-27 | 2015-03-04 | 国家电网公司 | Device and method for testing belt load capacity of electric energy metering equipment |
| CN105699756A (en) * | 2016-04-25 | 2016-06-22 | 国网冀北电力有限公司电力科学研究院 | Electronic load ripple detection device |
| CN105931446A (en) * | 2016-06-28 | 2016-09-07 | 常州机电职业技术学院 | Testing system for gas data acquiring unit and working method of testing system |
| CN108072855A (en) * | 2016-11-16 | 2018-05-25 | 通号（北京）轨道工业集团有限公司 | A kind of test device and test system |
| CN108965053A (en) * | 2018-07-02 | 2018-12-07 | 国网山东省电力公司菏泽供电公司 | Upper computer software method for testing pressure, apparatus and system |
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| CN114200381A (en) * | 2021-12-10 | 2022-03-18 | 清湖光旭数据科技(北京)有限公司 | System and method for detecting reliability of intelligent electric meter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391267A (en) * | 2014-11-27 | 2015-03-04 | 国家电网公司 | Device and method for testing belt load capacity of electric energy metering equipment |
| CN105699756A (en) * | 2016-04-25 | 2016-06-22 | 国网冀北电力有限公司电力科学研究院 | Electronic load ripple detection device |
| CN105931446A (en) * | 2016-06-28 | 2016-09-07 | 常州机电职业技术学院 | Testing system for gas data acquiring unit and working method of testing system |
| CN108072855A (en) * | 2016-11-16 | 2018-05-25 | 通号（北京）轨道工业集团有限公司 | A kind of test device and test system |
| CN108965053A (en) * | 2018-07-02 | 2018-12-07 | 国网山东省电力公司菏泽供电公司 | Upper computer software method for testing pressure, apparatus and system |
| CN109283457A (en) * | 2018-11-16 | 2019-01-29 | 国网山东省电力公司电力科学研究院 | A kind of M-BUS communication interface electric property detection method |
| CN109283457B (en) * | 2018-11-16 | 2020-11-17 | 国网山东省电力公司电力科学研究院 | Method for detecting electrical performance of M-BUS communication interface |
| CN114200381A (en) * | 2021-12-10 | 2022-03-18 | 清湖光旭数据科技(北京)有限公司 | System and method for detecting reliability of intelligent electric meter |
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