CN103513223B - A kind of electric energy meter communication interface load capacity test system - Google Patents
A kind of electric energy meter communication interface load capacity test system Download PDFInfo
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Abstract
The invention provides a kind of electric energy meter communication interface load capacity test system, comprise alternating current-direct current testing power supply, communication module, ripple test module, DC voltage detection module, direct current detection module, load switching control module, test load and host computer; Alternating current-direct current testing power supply is powered to test macro and electric energy meter by power interface simultaneously, communication module, ripple test module, DC voltage detection module, direct current detection module, load switch control module and test load is bi-directionally connected with host computer respectively, and ripple test module, DC voltage detection module, direct current detection module, load switch control module and communicate with electric energy meter with the communication interface of test load respectively by communication module.Contemplated by the invention the complicacy of test, utilize communication connection, electrical connection and test to connect and these different testing apparatuss and equipment under test are associated, and consider the test request of relevant criterion, there is advanced and module adaptive.
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 system.
Background technology
At present, China is carrying out the construction of power information acquisition system, power information acquisition system is made up of main website, acquisition terminal and ammeter etc., because system scale is large, domestic each terminal producer communication module, communication protocol are all by producer's self-developing, separate operation between each equipment, electric energy meter and communication unit one_to_one corresponding, the power requirement of electric energy meter, band carry and require that being is the customization of mated communication unit and optimization process, thus originally to power supply quality and power drives Capability Requirement not high.
Nowadays require that electric energy meter needs to match with multiple communication unit, realize interconnecting between communication unit and electric energy meter, but various communication unit there is larger otherness, thus the interchangeability between each devices in system and communication also exist many obstacles, constrain the promotion and application of acquisition system to a great extent, therefore requirements at the higher level are proposed to the power supply quality of electric energy meter and adaptive load ability.
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 is configured with communication interface can carry out data interaction with communication module.In order to ensure that these communication modules can reliably working, must ensure that electric energy meter communication interface possesses certain load capacity, also to ensure that electric energy meter can not produce strong jamming down at band year and affect the communication efficiency of communication module simultaneously, therefore must measure the power supply output of electric energy meter and load capacity, 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, ensure that electric energy meter communication interface possesses certain load capacity function, according to Q/GDW1355-2013 " single-phase intelligent electric energy meter pattern specification ", Q/GDW1356-2013 " three-phase intelligent electric-energy meter pattern specification ", Q/GDW1364-2013 " single-phase intelligent electric energy meter technical manual ", Q/GDW1827-2013 " three-phase intelligent electric-energy meter technical manual ", propose and a kind of electric energy meter communication interface load capacity test system is provided, 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 system, 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 control 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 switch control module and test load is bi-directionally connected with host computer respectively, and described ripple test module, DC voltage detection module, direct current detection module, load switch control module and communicate with electric energy meter with the communication interface of test load respectively by communication module.
Described alternating current-direct current testing power supply is program control alternating current-direct current testing power supply, and meet the generation of overvoltage under site environment or undervoltage condition, 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 components magnitude of voltage of described DC test power supply, and the low frequency AC components magnitude of voltage of collection is sent to data processing unit; Described data processing unit receives low frequency AC components magnitude of voltage, calculates the ripple peak-to-peak value in Different sampling period and carries out revision of the convention process, finally revision of the convention result being 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 to switch control module and completes the voltage measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
Described direct current detection module scans and measure the current value of described DC test power supply, coordinates load to switch control module and completes the current measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
Described host computer by load switch the load of control module Control experiment incision, 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 the communication interface of the communication interface of communication module, AC power interface and direct supply interface and electric energy meter, AC power interface and direct supply interface.
Compared with prior art, beneficial effect of the present invention is:
1. electric energy meter communication interface load capacity method of testing achieves on-line checkingi and the analytic function of electric energy meter communication interface load capacity, for testing staff provides intuitive and accurate detection data and figure and integration to detect 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 process provide effective foundation.By the test of communication interface load capacity, the requirement of Specification communications Unit Design, further increase the security of power information transmission, stability and reliability, for actual demand, the quickening better meeting electric power enterprise advances power information acquisition system and intelligent grid construction to provide technical support.
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, testing and 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. the problem normally worked for solving electric energy meter communication unit provides means of testing, further increases the advance of the stability of data communication, the security of system data, the integration of information, the extensibility of system and software platform.
Accompanying drawing explanation
Fig. 1 is electric energy meter communication interface load capacity test system structured flowchart;
Fig. 2 is electric energy meter communication interface load capacity test system test process figure.
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 system, 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 control 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 switch control module and test load is bi-directionally connected with host computer respectively, and described ripple test module, DC voltage detection module, direct current detection module, load switch control module and communicate with electric energy meter with the communication interface of test load respectively by communication module.
Described alternating current-direct current testing power supply is program control alternating current-direct current testing power supply, and meet the generation of overvoltage under site environment or undervoltage condition, described alternating current-direct current testing power supply comprises communication power supply and DC test power supply.Alternating current-direct current testing power supply selects 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 components magnitude of voltage of described DC test power supply, and the low frequency AC components magnitude of voltage of collection is sent to data processing unit; Described data processing unit receives low frequency AC components magnitude of voltage, calculates the ripple peak-to-peak value in Different sampling period and carries out revision of the convention process, finally revision of the convention result being 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 and input connection can reach measuring accuracy.Equally, select and there is high sensitivity frequency spectrograph, Impedance measurement can affect measuring accuracy equally, input is connected 3dB attenuator connecting test cable again, then can solve the resistance matching problem of connection preferably, inner electromagnetic isolation and shielding measure are mutually mutual, and broadband test adopts radio-frequency cable, general test adopts shielded cable, can realize measuring accuracy requirement preferably.
Ripple test module selects TS2212A programmable oscilloscope, minimum signal amplitude: 2mV/ lattice ~ 10V/ lattice, meet ripple signal test specification; There is 20MHzBW arrange: meet ripple test requirement; Programmable interface computing machine can reading.
Utilize the high sampling oscilloscope test peak-ripple voltage that test macro is built-in, utilize USB interface of computer to read the reading of oscillograph crest voltage, and carry out figure display, 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 to switch control module and completes the voltage measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
Described direct current detection module scans and measure the current value of described DC test power supply, coordinates load to switch control module and completes 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 voltage table and reometer respectively, 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.
Described host computer by load switch the load of control module Control experiment incision, 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 of low speed change, can meet standard-required; Electronic load is novel test load device, loading rate fast can be provided, utilize this characteristic of electronic load, the load change of artificial antenna public network GPRS communication can be carried out, can the communication interface carrying out verification terminal provide the fan-out capability of burst current, 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 timing sequence in test, adopt electronic load can solve the test problem of transient load, the application for acquisition terminal provides more correct applied environment requirement.Electronic load selects 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: arrange and store frequency spectrograph frequency, call Frequency and Amplitude correction tables of data, calculates and recording level data.
3) single-phase source arranges subroutine: table look-up and obtain corresponding code, send code by serial ports, and after postponing, reading source test parameter, judges whether single-phase source parameters is required ac voltage.
4) load incision subroutine: by arranging NET280116 railway digital amount code, judges load incision or disconnects.
5) electric current and voltage test subroutine: read NET2810 analog quantity sampled data, save as voltage value.
Test macro is connected respectively by the communication interface of the communication interface of communication module, AC power interface and direct supply interface and acquisition terminal, AC power interface and direct supply interface.
Advantage of the present invention also comprises:
1, advanced
This method of testing employing high-speed sampling and accurate synchronism detection technology solve the burst measurement problem of the dynamic power consumption under many power environments multi-group power, have certain advance.
2, test automation
This method of testing adopts the combination of program control technology and computer technology to efficiently solve the robotization display of the Automated condtrol of test process, the automatic business processing of test data and resolution chart.
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 with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. an electric energy meter communication interface load capacity test system, 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 control 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 switch control module and test load is bi-directionally connected with host computer respectively, and described ripple test module, DC voltage detection module, direct current detection module, load switch control module and communicate with electric energy meter with the communication interface of test load respectively by communication module;
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 components magnitude of voltage of described DC test power supply, and the low frequency AC components magnitude of voltage of collection is sent to data processing unit; Described data processing unit receives low frequency AC components magnitude of voltage, calculates the ripple peak ?peak value in Different sampling period and carries out revision of the convention process, finally revision of the convention result being transferred to described result identifying unit; Described result identifying unit judges whether the ripple of DC test power supply meets the demands.
2. electric energy meter communication interface load capacity test system 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 the generation of overvoltage under site environment or 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 system 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 system 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, coordinate load to switch control module and complete the voltage measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
5. electric energy meter communication interface load capacity test system according to claim 1, it is characterized in that: described direct current detection module scans and measure the current value of described DC test power supply, coordinate load to switch control module and complete the current measurement of described DC test power supply in unloaded, fully loaded, momentary load situation.
6. electric energy meter communication interface load capacity test system according to claim 1, is characterized in that: described host computer by load switch the load of control module Control experiment incision, cut out, charge capacity and sequential.
7. electric energy meter communication interface load capacity test system 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.
8. electric energy meter communication interface load capacity test system according to claim 1, is characterized in that: described test macro is connected respectively by the communication interface of the communication interface of communication module, AC power interface and direct supply interface and electric energy meter, AC power interface and direct supply interface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 | Test system for gas data acquisition unit and working method thereof |
| CN108072855B (en) * | 2016-11-16 | 2020-12-08 | 通号（北京）轨道工业集团有限公司 | Testing device and testing system |
| CN108965053B (en) * | 2018-07-02 | 2021-09-17 | 山东鲁软数字科技有限公司智慧能源分公司 | Method, device and system for testing software pressure of upper computer |
| 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 |
| CN110764044A (en) * | 2019-11-19 | 2020-02-07 | 广州供电局有限公司 | Voltage ripple detection device, system and detection method thereof |
| CN113884974A (en) * | 2021-11-10 | 2022-01-04 | 国网湖南省电力有限公司 | Weak current interface fault diagnosis device for electric energy meter |
| CN114200381B (en) * | 2021-12-10 | 2024-06-18 | 苏州昊星海洲科技有限公司 | Intelligent ammeter reliability detection system and method |
| CN114660354A (en) * | 2022-03-29 | 2022-06-24 | 南方电网科学研究院有限责任公司 | Voltage ripple detection device, method and equipment based on alternate sampling |
| WO2024082075A1 (en) * | 2022-10-17 | 2024-04-25 | 福建网能科技开发有限责任公司 | Smart terminal hardware interface test system, and test method thereof |
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