CN102832713B - CAN (controller area network) bus based distribution automation terminal and analog quantity acquisition method thereof - Google Patents
CAN (controller area network) bus based distribution automation terminal and analog quantity acquisition method thereof Download PDFInfo
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- CN102832713B CN102832713B CN201210309729.8A CN201210309729A CN102832713B CN 102832713 B CN102832713 B CN 102832713B CN 201210309729 A CN201210309729 A CN 201210309729A CN 102832713 B CN102832713 B CN 102832713B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to an analog quantity collecing method of a CAN (controller area network) bus based distribution automation terminal. The method includes the following steps: each distribution automation terminal having a plurality of data collecting units, each data collecting unit having two paths of three phase voltage collecting channels and a plurality of paths of three phase collecting channels; taking one path of bus voltage as a standard bus voltage, and connecting in parallel to the first path of voltage collecting channel of each data collecting unit, and connecting other plurality of paths of bus voltages to the second path of the voltage collecting channel of each data collecting unit. The invention further discloses the analog quantity collecting method of the CAN bus based distribution automation terminal. An ARM9 high-speed processor is taken as a core board, data gathering is realized by taking the first CAN bus as a main channel, and mutual information collection is realized among the data collecting units through the second CAN bus. The CAN bus based distribution automation terminal has strong expansibility and meets multipath bus configuration requirements of large-sized transformer substations, switching stations and ring network cabinets.
Description
Technical field
The present invention relates to electric power terminal field, especially a kind of analogue quantity acquiring method of the distribution power automation terminal based on CAN bus.
Background technology
Power distribution automation is the integrated system of the automation function of operation, monitoring, maintenance and user management including transformer station, power distribution network and user.Traditional distribution power automation terminal generally can only be monitored the voltage signal on two-way three-phase bus, but in the large-scale occasion such as transformer station, switching station, need the busbar voltage of monitoring may have three tunnels, even more than four tunnels, now traditional distribution power automation terminal just cannot be suitable for.
Summary of the invention
The object of the present invention is to provide a kind of analogue quantity acquiring method of the distribution power automation terminal based on CAN bus that can monitor busbar voltage more than two-way.
For achieving the above object, the present invention has adopted following technical scheme: a kind of analogue quantity acquiring method of the distribution power automation terminal based on CAN bus, and the method comprises the step of following order:
(1) on each distribution power automation terminal, there are multiple data acquisition units, on each data acquisition unit, there is two-way three-phase voltage acquisition channel and multichannel three-phase current acquisition channel;
(2) Jiang Yi road busbar voltage is as benchmark busbar voltage, and in the first via voltage acquisition passage of each data acquisition unit of access in parallel, other multichannel busbar voltages access in the second road voltage acquisition passage of each data acquisition unit;
Described distribution power automation terminal comprises the multiple data acquisition units for gathering three-phase voltage, current signal, and multiple data acquisition units are all communicated by letter with primary processor by a CAN bus, passes through the 2nd CAN bus communication between multiple data acquisition units; Described primary processor adopts ARM9 high speed processor, and the number of described data acquisition unit is 3, and data acquisition unit adopts DSP digital signal processor; For gathering the voltage transformer of three-phase voltage signal and being all connected with the input of analog switch for the current transformer that gathers three-phase current signal, the output of analog switch is connected with the input of A/D converter, the output of A/D converter is connected with the input of described DSP digital signal processor, and the output of described DSP digital signal processor is connected with first and second CAN bus respectively.
As shown from the above technical solution, the present invention, taking ARM9 high speed processor as core board, is that collecting of data realized in main thoroughfare by a CAN bus, passes through the mutual Information Monitoring of the 2nd CAN bus between each data acquisition unit simultaneously.The present invention has very strong extensibility, Jiang Yi road busbar voltage is as benchmark, in the first via voltage acquisition passage of each data acquisition unit of access in parallel, some roads busbar voltage in addition accesses in the second road voltage acquisition passage of each data acquisition unit, thus, just measurement passage that can arbitrary extension busbar voltage, thus realize the multichannel bus bar configuration requirement at large-scale substation, switching station, ring main unit.
Brief description of the drawings
Fig. 1 is the circuit block diagram of data acquisition unit and peripheral circuit thereof in the present invention;
Fig. 2 is mutual schematic diagram between data acquisition unit and primary processor in the present invention.
Embodiment
A kind of distribution power automation terminal based on CAN bus, comprise the multiple data acquisition units 1 for gathering three-phase voltage, current signal, multiple data acquisition units 1 are all communicated by letter with primary processor 3 by a CAN bus 2, between multiple data acquisition units 1, communicate by letter by the 2nd CAN bus 4.Described primary processor 3 adopts ARM9 high speed processor, as shown in Figure 1.Data between each data acquisition unit 1 are collected, and give primary processor 3 to process by a CAN bus 2, pass through the mutual Information Monitoring of the 2nd CAN bus 4 between each data acquisition unit 1 simultaneously.
As shown in Figure 1, the number of described data acquisition unit 1 is 3, and data acquisition unit 1 adopts DSP digital signal processor 5.For gathering the voltage transformer of three-phase voltage signal and being all connected with the input of analog switch for the current transformer that gathers three-phase current signal, the output of analog switch is connected with the input of A/D converter, the output of A/D converter is connected with the input of described DSP digital signal processor 5, and the output of described DSP digital signal processor 5 is connected with first and second CAN bus 2,4 respectively.After isolation AC signal, give A/D converter sampling, then A/D converter sampled result is issued to DSP digital signal processor 5 and process.Collecting unit taking DSP digital signal processor 5 as core, is responsible for all data sampling and processing, controls and carry out, simultaneously using ARM9 high speed processor as core board, by a CAN bus 2 at a high speed for realizing collecting of data in main thoroughfare.
As shown in Figure 2, analogue quantity acquiring method of the present invention, the method comprises the step of following order: first, on each distribution power automation terminal, there are multiple data acquisition units 1, on each data acquisition unit 1, there is two-way three-phase voltage acquisition channel and multichannel three-phase current acquisition channel, in the time that needs are measured busbar voltage, the voltage acquisition input on distribution power automation terminal need to be carried out corresponding configuration; Zai Jiang mono-tunnel busbar voltage is as benchmark bus 6 voltages, and in the first via voltage acquisition passage 7 of each data acquisition unit 1 of access in parallel, other multichannel busbar voltages access in the second road voltage acquisition passage 8 of each data acquisition unit 1.
The first via voltage acquisition passage 7 of each data acquisition unit 1 is accessed to benchmark bus 6 voltages, be designated as the 0th tunnel; Then the second road voltage acquisition passage 8 that other road busbar voltages that need to gather is in addition accessed respectively to each data acquisition unit 1, is designated as respectively the 1st, 2,3 until N road.In actual applications, the analog quantity of collection is changed into amplitude and phase angle by each data acquisition unit 1, and the original bench mark of phase angle is the A phase voltage of the 0th road bus.
In actual motion, each data acquisition unit 1 passes through mutual remaining the 1st tunnel of the 2nd CAN bus 4, the 2nd tunnel, the 3rd road until the voltage magnitude on N road and phase angle, the electric current on each data acquisition unit 1 just can calculate corresponding power according to the voltage bus analog quantity information on other collecting units that obtain alternately, realize the correspondence of voltage, electric current between different data acquisition unit 1 and calculate, the autgmentability of terminal is strengthened greatly.
In addition, by the change of configuration information, can make voltage and current there is corresponding corresponding relation, thereby realize between different data acquisition unit 1 mutual between voltage and current analog quantity, calculate the active power, reactive power, power factor in each loop etc.
In sum, the present invention, taking ARM9 high speed processor as core board, for realizing collecting of data in main thoroughfare, passes through the mutual Information Monitoring of the 2nd CAN bus 4 by a CAN bus 2 simultaneously between each data acquisition unit 1.The present invention has very strong extensibility, Jiang Yi road busbar voltage is as benchmark, in the first via voltage acquisition passage 7 of each data acquisition unit 1 of access in parallel, some roads busbar voltage in addition accesses in the second road voltage acquisition passage 8 of each data acquisition unit 1, thus, just measurement passage that can arbitrary extension busbar voltage, thus realize the multichannel bus bar configuration requirement at large-scale substation, switching station, ring main unit.
Claims (2)
1. an analogue quantity acquiring method for the distribution power automation terminal based on CAN bus, the method comprises the step of following order:
(1) on each distribution power automation terminal, there are multiple data acquisition units, on each data acquisition unit, there is two-way three-phase voltage acquisition channel and multichannel three-phase current acquisition channel;
(2) Jiang Yi road busbar voltage is as benchmark busbar voltage, and in the first via voltage acquisition passage of each data acquisition unit of access in parallel, other multichannel busbar voltages access in the second road voltage acquisition passage of each data acquisition unit;
Described distribution power automation terminal comprises the multiple data acquisition units for gathering three-phase voltage, current signal, and multiple data acquisition units are all communicated by letter with primary processor by a CAN bus, passes through the 2nd CAN bus communication between multiple data acquisition units; Described primary processor adopts ARM9 high speed processor, and the number of described data acquisition unit is 3, and data acquisition unit adopts DSP digital signal processor; For gathering the voltage transformer of three-phase voltage signal and being all connected with the input of analog switch for the current transformer that gathers three-phase current signal, the output of analog switch is connected with the input of A/D converter, the output of A/D converter is connected with the input of described DSP digital signal processor, and the output of described DSP digital signal processor is connected with first and second CAN bus respectively.
2. the analogue quantity acquiring method of the distribution power automation terminal based on CAN bus according to claim 1, is characterized in that: by the first via voltage acquisition passage access benchmark busbar voltage of each data acquisition unit, be designated as the 0th tunnel; Then the second road voltage acquisition passage that other road busbar voltages that need to gather is in addition accessed respectively to each data acquisition unit, is designated as respectively the 1st, 2,3 until N road.
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| CN201210309729.8A CN102832713B (en) | 2012-08-28 | 2012-08-28 | CAN (controller area network) bus based distribution automation terminal and analog quantity acquisition method thereof |
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| CN201210309729.8A CN102832713B (en) | 2012-08-28 | 2012-08-28 | CAN (controller area network) bus based distribution automation terminal and analog quantity acquisition method thereof |
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| CN102832713B true CN102832713B (en) | 2014-12-17 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104007337B (en) * | 2014-05-08 | 2023-05-09 | 上海银音信息科技股份有限公司 | Three-phase load monitoring device, system and power distribution cabinet |
| CN104898606A (en) * | 2015-04-10 | 2015-09-09 | 航天科工深圳（集团）有限公司 | Intelligent ring main unit and monitoring unit system and monitoring method thereof |
| CN104852466B (en) * | 2015-04-16 | 2017-09-26 | 广东科瑞德电气科技有限公司 | A kind of distribution automation terminal |
| CN104991530A (en) * | 2015-05-19 | 2015-10-21 | 航天科工深圳（集团）有限公司 | Communication method based on CAN bus, and power distribution terminal |
| CN111091478B (en) * | 2019-11-19 | 2022-07-05 | 广西电网有限责任公司电力科学研究院 | CAN bus-based distributed structure station terminal communication method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201830019U (en) * | 2010-06-22 | 2011-05-11 | 安徽科大智能电网技术有限公司 | Intelligent power distribution automation terminal feeder terminal unit (FTU) |
| CN202033050U (en) * | 2011-01-21 | 2011-11-09 | 北京睿永康科技有限公司 | Multiway quick data acquisition system |
| CN202798155U (en) * | 2012-08-28 | 2013-03-13 | 安徽科大智能电网技术有限公司 | Distribution automation terminal based on CAN buses |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201830019U (en) * | 2010-06-22 | 2011-05-11 | 安徽科大智能电网技术有限公司 | Intelligent power distribution automation terminal feeder terminal unit (FTU) |
| CN202033050U (en) * | 2011-01-21 | 2011-11-09 | 北京睿永康科技有限公司 | Multiway quick data acquisition system |
| CN202798155U (en) * | 2012-08-28 | 2013-03-13 | 安徽科大智能电网技术有限公司 | Distribution automation terminal based on CAN buses |
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