CN102565583A - Power quality monitoring terminal for switch-in electronic mutual inductor - Google Patents
Power quality monitoring terminal for switch-in electronic mutual inductor Download PDFInfo
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- CN102565583A CN102565583A CN2012100007656A CN201210000765A CN102565583A CN 102565583 A CN102565583 A CN 102565583A CN 2012100007656 A CN2012100007656 A CN 2012100007656A CN 201210000765 A CN201210000765 A CN 201210000765A CN 102565583 A CN102565583 A CN 102565583A
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Abstract
The invention relates to a power quality monitoring terminal for a switch-in electronic mutual inductor. The power quality monitoring terminal has the technical characteristics that a fiber transceiver and a CPU are included and connected; the fiber transceiver is connected with the electronic mutual inductor in a process level through optical fibers and used for receiving real-time sampling data output by the electronic mutual inductor and sending the sampling data to the CPU; and the CPU performs electrical energy analysis and calculation to the received real-time sampling data, and uploads the power quality data obtained through the calculation to a station control level through a network interface. The power quality monitoring terminal has a reasonable design, realizes the function that a plurality of outgoing lines can be monitored simultaneously through one monitoring terminal, reduces the equipment cost, effectively avoids the influence of electromagnetic interference, is greatly improved on stability, reliability, safety and other aspects, meets the accuracy required by the power quality monitoring and analyzing, and meets the requirement for power quality monitoring of an intelligent power network.
Description
Technical field
The invention belongs to the intelligent grid field, especially a kind of electric energy quality monitoring terminal that inserts electronic mutual inductor.
Background technology
Great changes have taken place in intelligent grid and traditional electrical network on the analog acquisition mode, the analog-signal transitions of being imported from conventional voltage, current transformer by cable is the Electrical Instrument Transducers with Digital signal by telecommunication cable or optical fiber input.The tradition electricity grid substation; As shown in Figure 2; Send the simulating signal of each harvester (comprising protection, electric energy quality monitoring) 100V/5A by electromagnetic potential, current transformer to through cable, each harvester needs configuration voltages, current transformer, and this simulating signal is transformed to the small-signal that embedded equipment can receive; Become digital signal through the AD conversion, carry out related operation by CPU.Because electromagnetic potential, current transformer volume ratio are bigger, unitary device can not realize simultaneously many outlets being monitored, and each road analog quantity all need dispose a high-precision AD conversion, and cost is higher.Therefore, adopt the electric energy quality monitoring terminal of traditional electrical network can not satisfy the needs of intelligent grid.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of electric energy quality monitoring terminal that can monitor and satisfy the access electronic mutual inductor of intelligent grid demand simultaneously to many outlets is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of electric energy quality monitoring terminal that inserts electronic mutual inductor; Connect and compose by fiber optical transceiver and CPU; Fiber optical transceiver links to each other with the electronic mutual inductor of process layer through optical fiber and is used for receiving the real-time sampling data of electric mutual inductor output and being sent to CPU; CPU carries out the electric energy analytical calculation to the real-time sampling data that receive, and the power quality data that calculates is uploaded to station level through network interface.
And described CPU is DSP or FPGA.
And described real-time sampling data comprise the voltage and current data of many outlets.
And described power quality data comprises voltage deviation, frequency departure, harmonic wave, voltage fluctuation and flickering, three-phase imbalance data.
Advantage of the present invention and good effect are:
The present invention adopts fiber optical transceiver to receive digitizing real-time sampling data from electronic mutual inductor, and analyzes accordingly and handle, and has not only simplified the hardware configuration of monitoring terminal; Realize once, effective electrical isolation of secondary device, and improved the accuracy and the reliability of monitoring terminal, realize the digital applications of data acquisition link; Avoided the influence of electromagnetic interference (EMI), obtained large increase, for power quality analysis provides accurately, the authentic data source at aspects such as stability, reliability, securities; Satisfy electric energy quality monitoring and analyzed needed precision; Simultaneously, owing to include the switching signal of many outlets in the sampled data bag that fiber optical transceiver receives, therefore; A monitoring terminal can realize monitoring simultaneously many outlet functions, has practiced thrift the cost of equipment greatly.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is the circuit block diagram of traditional transformer station.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is done further detailed description:
A kind of electric energy quality monitoring terminal that inserts electronic mutual inductor; As shown in Figure 1; Connect and compose by fiber optical transceiver and CPU; Fiber optical transceiver is connected through the electronic mutual inductor of optical fiber with the process layer, and fiber optical transceiver receives real-time sampling data such as the voltage, electric current of electric mutual inductor output and is sent among the CPU, and CPU carries out the electric energy analytical calculation to real-time sampling data such as the voltage that receives, electric currents; Obtain quality of power supply technical indicators such as voltage deviation, frequency departure, harmonic wave, voltage fluctuation and flickering, three-phase imbalance, and analysis result is uploaded station level through network interface.In the present embodiment, fiber optical transceiver adopts the fiber optical transceiver of AVAGO company, and CPU can adopt DSP (digital signal processor) or FPGA (field programmable gate array) or other microprocessor modules.
Because intelligent substation adopts electronic mutual inductor; It is through optical fiber output digital signal, and this digital signal can directly be received by electric energy quality monitoring terminal, saves middle by the transform part of analog quantity to digital quantity; Only needing to carry out the data-signal conversion according to IEC61850 related protocol regulation gets final product; CPU can directly carry out related operation to this signal, calculates each item monitoring index of the quality of power supply, owing to include the switching signal of many outlets in the packet that fiber optical transceiver receives; A CPU can realize monitoring simultaneously many outlets, has practiced thrift the cost of equipment greatly.Simultaneously, be light signal and unconventional electric signal is reduced by the influence of electromagnetic interference (EMI) greatly because electric energy quality monitoring terminal receives, therefore, improved the electromagnetic compatibility level of whole terminal.
The course of work of the present invention is: this monitoring terminal carries out opto-electronic conversion through fiber optical transceiver with the light signal that process layer electronic mutual inductor sends; Resolve Internet protocol (TCP/IP); According to the IEC61850 protocol specification, the packet that decoding is received obtains voltage, real-time current sampled data; Then sampled data is carried out the electric energy analysis; Quality of power supply technical indicators such as calculating voltage deviation, frequency departure, harmonic wave, voltage fluctuation and flicker, three-phase imbalance, and analysis result is uploaded station level through network, realize real-time monitoring and control to the quality of power supply.
It is emphasized that; Embodiment of the present invention is illustrative; Rather than it is determinate; Therefore the present invention is not limited to the embodiment described in the embodiment, and every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope that the present invention protects equally.
Claims (4)
1. electric energy quality monitoring terminal that inserts electronic mutual inductor; It is characterized in that: connect and compose by fiber optical transceiver and CPU; Fiber optical transceiver links to each other with the electronic mutual inductor of process layer through optical fiber and is used for receiving the real-time sampling data of electric mutual inductor output and being sent to CPU; CPU carries out the electric energy analytical calculation to the real-time sampling data that receive, and the power quality data that calculates is uploaded to station level through network interface.
2. the electric energy quality monitoring terminal of access electronic mutual inductor according to claim 1 is characterized in that: described CPU is DSP or FPGA.
3. the electric energy quality monitoring terminal of access electronic mutual inductor according to claim 1 is characterized in that: described real-time sampling data comprise the voltage and current data of many outlets.
4. the electric energy quality monitoring terminal of access electronic mutual inductor according to claim 1 is characterized in that: described power quality data comprises voltage deviation, frequency departure, harmonic wave, voltage fluctuation and flickering, three-phase imbalance data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100007656A CN102565583A (en) | 2012-01-04 | 2012-01-04 | Power quality monitoring terminal for switch-in electronic mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100007656A CN102565583A (en) | 2012-01-04 | 2012-01-04 | Power quality monitoring terminal for switch-in electronic mutual inductor |
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| CN102565583A true CN102565583A (en) | 2012-07-11 |
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| CN2012100007656A Pending CN102565583A (en) | 2012-01-04 | 2012-01-04 | Power quality monitoring terminal for switch-in electronic mutual inductor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487625A (en) * | 2013-09-13 | 2014-01-01 | 国家电网公司 | Electric system transient waveform storage monitoring system and monitoring method thereof |
| CN103823141A (en) * | 2014-02-28 | 2014-05-28 | 国家电网公司 | Method for simultaneously measuring qualities of electric energy of multiple alternating current circuits based on digital signals |
| CN104393674A (en) * | 2014-10-28 | 2015-03-04 | 许继电气股份有限公司 | Intelligent transformer station electronic mutual inductor state monitoring system and method |
| CN109298275A (en) * | 2018-10-19 | 2019-02-01 | 许昌许继软件技术有限公司 | A kind of monitoring system and device for taking into account arrester monitoring and electric energy quality monitoring |
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| US20080312851A1 (en) * | 2004-10-20 | 2008-12-18 | Electro Industries/Gauge Tech. | Portable Power Quality Analyzer with Networking Capabilities |
| CN101770005A (en) * | 2010-01-22 | 2010-07-07 | 云南电力试验研究院(集团)有限公司 | DC electronic transformer calibration device and method |
| CN201654155U (en) * | 2010-05-12 | 2010-11-24 | 江苏谷峰电力科技有限公司 | Power quality monitoring management terminal |
| CN202424316U (en) * | 2012-01-04 | 2012-09-05 | 天津市电力公司 | Power quality monitoring terminal applicable to smart grid |
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2012
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20080312851A1 (en) * | 2004-10-20 | 2008-12-18 | Electro Industries/Gauge Tech. | Portable Power Quality Analyzer with Networking Capabilities |
| CN101291059A (en) * | 2007-08-28 | 2008-10-22 | 东南大学 | Electricity quality analyzer oriented to digitalized electrical system and electricity quality analysis method |
| CN101770005A (en) * | 2010-01-22 | 2010-07-07 | 云南电力试验研究院(集团)有限公司 | DC electronic transformer calibration device and method |
| CN201654155U (en) * | 2010-05-12 | 2010-11-24 | 江苏谷峰电力科技有限公司 | Power quality monitoring management terminal |
| CN202424316U (en) * | 2012-01-04 | 2012-09-05 | 天津市电力公司 | Power quality monitoring terminal applicable to smart grid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487625A (en) * | 2013-09-13 | 2014-01-01 | 国家电网公司 | Electric system transient waveform storage monitoring system and monitoring method thereof |
| CN103823141A (en) * | 2014-02-28 | 2014-05-28 | 国家电网公司 | Method for simultaneously measuring qualities of electric energy of multiple alternating current circuits based on digital signals |
| CN104393674A (en) * | 2014-10-28 | 2015-03-04 | 许继电气股份有限公司 | Intelligent transformer station electronic mutual inductor state monitoring system and method |
| CN109298275A (en) * | 2018-10-19 | 2019-02-01 | 许昌许继软件技术有限公司 | A kind of monitoring system and device for taking into account arrester monitoring and electric energy quality monitoring |
| CN109298275B (en) * | 2018-10-19 | 2021-08-06 | 许昌许继软件技术有限公司 | Monitoring system and device for monitoring lightning arrester and monitoring power quality |
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Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE STATE GRID Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20121120 |
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Effective date of registration: 20121120 Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: Tianjin Electric Power Corp. Applicant after: China Electric Power Research Institute Applicant after: State Grid Corporation of China Address before: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant before: Tianjin Electric Power Corp. Applicant before: China Electric Power Research Institute |
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Application publication date: 20120711 |