CN203405496U - Electric power system transient waveform storage monitoring system - Google Patents
Electric power system transient waveform storage monitoring system Download PDFInfo
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- CN203405496U CN203405496U CN201320569822.2U CN201320569822U CN203405496U CN 203405496 U CN203405496 U CN 203405496U CN 201320569822 U CN201320569822 U CN 201320569822U CN 203405496 U CN203405496 U CN 203405496U
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Abstract
The utility model relates to an electric power system transient waveform storage monitoring system, relates to the electric power system transient waveform storage monitoring system and solves a problem of low precision of a monitoring result caused by a complex structure and small quantities of acquired signals existing in a monitoring system structure in the prior art. A voltage transformer and a current transformer are arranged in an acquisition channel, the voltage transformer is used for acquiring voltage signals of an electrical power system, the current transformer is used for acquiring current signals of the electric power system, a secondary side of the voltage transformer is connected with a voltage signal input end of a signal processor, a secondary side of the current transformer is connected with a current signal input end of the signal processor, a signal output end of the signal processor is connected with an acquisition signal input end of a signal acquisition card, an acquisition signal output end of the signal acquisition card is connected with an acquisition signal input end of an embedded single board computer, and a digital signal output end of the embedded single board computer is a digital signal output end of a transient waveform storage oscillography system. The electric power system transient waveform storage monitoring system is applicable to transient monitoring on the electric power system.
Description
Technical field
The utility model relates to electric system transient waveform storage monitoring technical field.
Background technology
In the measurement of classic method various electric parameters transient state parts in to electrical test, often adopting the surveying instruments such as magnetic tape station, fault oscillograph, more or less there is following subject matter in them: Starting mode is set less, picking rate is low, synchronous recording passage is few, each passage altogether, to the electric parameter software analysis function recording few or without etc.On the other hand, in monitoring Power System Steady-state, comprehensively, at length analyze a plurality of electrical quality indexs, obtain especially timely experiment field data, can find in time to jeopardize the hidden danger of electric power netting safe running, guarantee the safe operation of consumer.Meanwhile, also can meet the needs of scientific research, bring good economic benefit and social benefit.
Along with numerous precision electronic devices of controlling based on computing machine, microprocessor and power electronic equipment are used in a large number in electric system, user is more and more higher to the requirement of power supply reliability, more and more higher to the sensitivity of the quality of power supply.And current electrical test measuring method and device can not meet the requirement of monitoring.And for monitoring the method and apparatus of the quality of power supply, exist monitoring time short more, and recording number of times few, mode of operation is not convenient, and the deficiency of the aspects such as relevant analysis software lacks is provided.
Utility model content
The utility model is few in order to solve complex structure and the collection signal quantity of existing power system monitoring system, causes the low problem of degree of accuracy of monitoring result, has proposed a kind of electric system transient waveform storage monitoring system.
A transient waveform storage monitoring system, it comprises transient waveform storage digitizing and PC, the digital signal output end of described transient waveform storage digitizing is connected with the digital signal input end of PC with transmission line by data communication port,
Transient waveform storage digitizing is many acquisition channels system, described acquisition channel is M, M is more than or equal to 16, is less than or equal to 20 integer, transient waveform storage digitizing comprises M voltage transformer (VT), a M current transformer, signal processor, data acquisition card and embedded board computer
In each acquisition channel, all install a voltage transformer (VT) and a current transformer, the primary side of voltage transformer (VT) is for gathering the voltage signal of electric system, the primary side of current transformer is for gathering the current signal of electric system, the secondary side of each voltage transformer (VT) is all connected with a voltage signal input end of signal processor, the secondary side of each current transformer is all connected with a current signal input end of signal processor, the signal output part of signal processor is connected with the collection signal input end of data acquisition card, the collection signal output terminal of data acquisition card is connected with the collection signal input end of embedded board computer, the digital signal output end of embedded board computer is the digital signal output end of transient waveform storage digitizing.
Beneficial effect: monitoring system of the present utility model is simple in structure, the quantity of collection signal is many, has improved more than 5% the degree of accuracy of this monitoring system.
Accompanying drawing explanation
Fig. 1 is the structural representation of transient waveform storage digitizing.
Embodiment
Embodiment one, in conjunction with Fig. 1, this embodiment is described, a kind of electric system transient waveform storage monitoring system, it comprises transient waveform storage digitizing and PC, the digital signal output end of described transient waveform storage digitizing is connected with the digital signal input end of PC with transmission line by data communication port
Transient waveform storage digitizing is many acquisition channels system, described acquisition channel is M, M is more than or equal to 16, is less than or equal to 20 integer, transient waveform storage digitizing comprises M voltage transformer (VT) 1, a M current transformer 2, signal processor 3, data acquisition card 4 and embedded board computer 11
In each acquisition channel, all install a voltage transformer (VT) 1 and a current transformer 2, the primary side of voltage transformer (VT) 1 is for gathering the voltage signal of electric system, the primary side of current transformer 2 is for gathering the current signal of electric system, the secondary side of each voltage transformer (VT) 1 is all connected with a voltage signal input end of signal processor 3, the secondary side of each current transformer 2 is all connected with a current signal input end of signal processor 3, the signal output part of signal processor 3 is connected with the collection signal input end of data acquisition card 4, the collection signal output terminal of data acquisition card 4 is connected with the collection signal input end of embedded board computer 11, the digital signal output end of embedded board computer 11 is the digital signal output end of transient waveform storage digitizing.
In present embodiment, feature for the synchronous input of the voltage and current semaphore request for a plurality of electric pressures in electric system, acquisition channel number is designed to minimum 16 tunnels, simultaneously different according to the frequency of operation of various electrical equipments in electric system features, parallel acquisition frequency of the present invention is up to 500kHz, and be divided into the frequency acquisition of a plurality of gears, can carry out accurately record to the transition effect in electric system.
In present embodiment, transient waveform storage digitizing has network function, can carry out Long-distance Control and data transmission by PC network, data communication port adopts TCP/IP communications protocol, by the IP address of transient waveform storage digitizing is set, can realize real-time control apparatus by the browser on PC network and carry out data recording, analysis, demonstration and transfer function, when having guaranteed that this device can rig-site utilization, also can realize by PC network and carry out strange land control and data transmission.
Embodiment two, in conjunction with Fig. 1, this embodiment is described, this embodiment is with the difference that a kind of electric system transient waveform described in embodiment one is stored monitoring system, described embedded board computer 11 comprises data processor 5, data-carrier store 6 and data derived circuit 7, the collection signal output terminal of described data acquisition card 4 is connected with the data processing signal input part of data processor 5, the data processing signal output part of data processor 5 is connected with the data storage signal input end of data-carrier store 6, the data sending out signals output terminal of data-carrier store 6 is connected with the data sending out signals input end of data derived circuit 7, the digital signal output end of data derived circuit 7 is the digital signal output end of embedded board computer 11,
Embedded board computer 11 also comprises data comparator 8, parameter setting circuit 9 and data recording circuit 10, the data comparison signal input end of data comparator 8 is connected with the data comparison signal output terminal of data processor 5, the data comparison signal output terminal of parameter setting circuit 9 is connected with the data comparison signal input end of data comparator 8, the data acknowledgment signal input end of data recording circuit 10 is connected with the data acknowledgment signal output terminal of data comparator 8, the data acknowledgment signal output terminal of data recording circuit 10 is connected with the data acknowledgment signal input end of data processor 5.
In present embodiment, the initial value of the data recording time span of setting can be 1min, 5min, 10min, 20min, 30min, 60min and 120min.
In present embodiment, embedded board computer 11 can each collection signal of time recording measurement data, according to the every country standard code of electric energy quality monitoring, the steady-state quantity of voltage deviation, voltage fluctuation and flickering, tri-phase unbalance factor is carried out to cycle index data simultaneously, the data of record can be stored triennium simultaneously, and the statistics of the quality of power supply can be provided in long-time section.
In present embodiment, embedded board computer 11 adopts (SuSE) Linux OS, adopt C language development analysis software, system run all right, resource occupation amount is little and computing velocity is fast, can meet the requirement of site test, utilize CGI to realize data analysis and demonstration, can calculate superpotential multiple and frequency, harmonic wave qualification rate, Short Term Flicker, flickering when long, voltage deviation statistics and Voltage unbalance; Meanwhile, the WEB service in embedded board computer 11 can provide data analysis and remote control function, and FTP service can provide the transporting function of data, and MySql database service can provide the storage of steady state voltage amount.
The difference of a kind of electric system transient waveform storage monitoring system described in embodiment three, this embodiment and embodiment one is, it also comprises external power source, and described external power source is for powering to transient waveform storage digitizing.
External power source in present embodiment is taked through step-down isolation transformer input quarantine measures, and for the higher feature of electric system ubiquity voltage, the no-load voltage ratio of step-down isolation transformer is designed to 250:240.
The difference of a kind of electric system transient waveform storage monitoring system described in embodiment four, this embodiment and embodiment one is, described transmission line employing shielded twisted pair.
The difference of a kind of electric system transient waveform storage monitoring system described in embodiment five, this embodiment and embodiment one is; it also comprises lightning protection circuit; described lightning protection circuit is installed in acquisition channel front end, for transient waveform storage digitizing, at gatherer process, carries out lightning protected.
Claims (5)
1. an electric system transient waveform is stored monitoring system, it is characterized in that, it comprises transient waveform storage digitizing and PC, the digital signal output end of described transient waveform storage digitizing is connected with the digital signal input end of PC with transmission line by data communication port, transient waveform storage digitizing is many acquisition channels system, described acquisition channel is M, M is for being more than or equal to 16, be less than or equal to 20 integer, transient waveform storage digitizing comprises M voltage transformer (VT) (1), M current transformer (2), signal processor (3), data acquisition card (4) and embedded board computer (11),
In each acquisition channel, all install a voltage transformer (VT) (1) and a current transformer (2), the primary side of voltage transformer (VT) (1) is for gathering the voltage signal of electric system, the primary side of current transformer (2) is for gathering the current signal of electric system, the secondary side of each voltage transformer (VT) (1) is all connected with a voltage signal input end of signal processor (3), the secondary side of each current transformer (2) is all connected with a current signal input end of signal processor (3), the signal output part of signal processor (3) is connected with the collection signal input end of data acquisition card (4), the collection signal output terminal of data acquisition card (4) is connected with the collection signal input end of embedded board computer (11), the digital signal output end of embedded board computer (11) is the digital signal output end of transient waveform storage digitizing.
2. a kind of electric system transient waveform according to claim 1 is stored monitoring system, it is characterized in that, described embedded board computer (11) comprises data processor (5), data-carrier store (6) and data derived circuit (7), the collection signal output terminal of described data acquisition card (4) is connected with the data processing signal input part of data processor (5), the data processing signal output part of data processor (5) is connected with the data storage signal input end of data-carrier store (6), the data sending out signals output terminal of data-carrier store (6) is connected with the data sending out signals input end of data derived circuit (7), the digital signal output end of data derived circuit (7) is the digital signal output end of embedded board computer (11),
Embedded board computer (11) also comprises data comparator (8), parameter setting circuit (9) and data recording circuit (10), the data comparison signal input end of data comparator (8) is connected with the data comparison signal output terminal of data processor (5), the data comparison signal output terminal of parameter setting circuit (9) is connected with the data comparison signal input end of data comparator (8), the data acknowledgment signal input end of data recording circuit (10) is connected with the data acknowledgment signal output terminal of data comparator (8), the data acknowledgment signal output terminal of data recording circuit (10) is connected with the data acknowledgment signal input end of data processor (5).
3. a kind of electric system transient waveform storage monitoring system according to claim 1, is characterized in that, it also comprises external power source, and described external power source is for powering to transient waveform storage digitizing.
4. a kind of electric system transient waveform storage monitoring system according to claim 1, is characterized in that, described transmission line adopts shielded twisted pair.
5. a kind of electric system transient waveform according to claim 1 is stored monitoring system; it is characterized in that; it also comprises lightning protection circuit, and described lightning protection circuit is installed in acquisition channel front end, for transient waveform storage digitizing, at gatherer process, carries out lightning protected.
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| CN201320569822.2U CN203405496U (en) | 2013-09-13 | 2013-09-13 | Electric power system transient waveform storage monitoring system |
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| CN201320569822.2U CN203405496U (en) | 2013-09-13 | 2013-09-13 | Electric power system transient waveform storage monitoring system |
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Cited By (2)
| 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 |
| CN105373578A (en) * | 2015-08-17 | 2016-03-02 | 中国电力科学研究院 | Large-capacity data processing method in extra-high voltage lightning invasion wave monitoring |
-
2013
- 2013-09-13 CN CN201320569822.2U patent/CN203405496U/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| CN105373578A (en) * | 2015-08-17 | 2016-03-02 | 中国电力科学研究院 | Large-capacity data processing method in extra-high voltage lightning invasion wave monitoring |
| CN105373578B (en) * | 2015-08-17 | 2019-08-16 | 中国电力科学研究院 | Large Volume Data processing method in a kind of monitoring of extra-high voltage Lightning Incoming Wave |
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Granted publication date: 20140122 Termination date: 20180913 |