CN103487625A - Electric system transient waveform storage monitoring system and monitoring method thereof - Google Patents
Electric system transient waveform storage monitoring system and monitoring method thereof Download PDFInfo
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- CN103487625A CN103487625A CN201310418384.4A CN201310418384A CN103487625A CN 103487625 A CN103487625 A CN 103487625A CN 201310418384 A CN201310418384 A CN 201310418384A CN 103487625 A CN103487625 A CN 103487625A
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Abstract
The invention provides an electric system transient waveform storage monitoring system and a monitoring method of the electric system transient waveform storage monitoring system, and relates to the technical field of electric system transient waveform storage monitoring. According to the electric system transient waveform storage monitoring system and the monitoring method of the electric system transient waveform storage monitoring system, the problem that a monitoring result is low in accuracy due to the fact that an existing electric system monitoring system is complex in structure and small in signal acquisition number is solved, and the problem that operation is difficult due to the fact that the monitoring method of the existing electric system monitoring system is too complex is also solved. A voltage transformer is used for acquiring voltage signals of an electric system. A current transformer is used for acquiring current signals of the electric system. The voltage signals and the current signals are processed through a signal processor and then acquired through a signal acquisition card, the acquired signals are transmitted to an embedded single-board computer to be analyzed and processed, data which are analyzed and processed are recorded according to a preset recording time and then exported, and then data information is displayed on a PC through communication with the PC. The electric system transient waveform storage monitoring system and the monitoring method of the electric system transient waveform storage monitoring system are suitable for transient state monitoring of the electric system.
Description
Technical field
The present invention 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 adopt the surveying instruments such as light oscillograph, magnetic tape station, fault oscillograph, more or less there is following subject matter in they: Starting mode is set less, picking rate is low, the synchronous recording passage is few, each passage altogether, to the electric parameter software analysis function that records few or without etc.On the other hand, in the monitoring Power System Steady-state, comprehensively, at length analyze a plurality of electrical quality indexs, obtain especially timely the experiment field data, can find in time to jeopardize the hidden danger of electric power netting safe running, guarantee the safe operation of consumer.Simultaneously, also can meet the needs of scientific research, bring good economic benefit and social benefit.
Along with numerous precise electronic and power electronic equipments of controlling based on computing machine, microprocessor are used in a large number in electric system, the 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 period 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.
Summary of the invention
The present invention is few for complex structure and the collection signal quantity that solves existing power system monitoring system, the low problem of degree of accuracy that causes monitoring result, monitoring method due to existing power system monitoring system is too complicated simultaneously, the problem that causes operating difficulties, proposed a kind of electric system transient waveform storage monitoring system and monitoring method thereof.
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), a M current transformer, signal processor, data acquisition card and embedded board computer
All install a voltage transformer (VT) and a current transformer in each acquisition channel, 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) all is connected with a voltage signal input end of signal processor, the secondary side of each current transformer all is 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 that the digital signal output end of embedded board computer is transient waveform storage digitizing.
The embedded board computer comprises data processor, data-carrier store and data derived circuit, the collection signal output terminal of described data acquisition card is connected with the data processing signals input end of data processor, the data processing signals output terminal of data processor is connected with the data storage signal input end of data-carrier store, the data sending out signals output terminal of data-carrier store is connected with the data sending out signals input end of data derived circuit, the digital signal output end that the digital signal output end of data derived circuit is the embedded board computer
The embedded board computer also comprises data comparator, parameter setting circuit and data recording circuit, the data comparison signal input end of data comparator is connected with the data comparison signal output terminal of data processor, the data comparison signal output terminal of parameter setting circuit is connected with the data comparison signal input end of data comparator, the data acknowledgment signal input end of data recording circuit is connected with the data acknowledgment signal output terminal of data comparator, and the data acknowledgment signal output terminal of data recording circuit is connected with the data acknowledgment signal input end of data processor.
The difference of the monitoring method of a kind of electric system transient waveform storage monitoring system is, it is realized by following steps:
Step 1, the initial value of voltage starting value and the data recording time span of each acquisition channel is set in parameter setting circuit, and the initial value of the voltage starting value of described each acquisition channel and data recording time span is transferred in data comparator;
Data transmission after step 6, data processor will be processed is to data comparator;
The data of step 8, all collection signals while the voltage peak of the collection signal in any one acquisition channel being greater than to the voltage starting value of initial setting up of this acquisition channel are carried out data recording by the data recording circuit, and using the upper half-full data in data acquisition card as the home record data, the data recording time span of the time span of record data and initial setting up;
Beneficial effect: monitoring system of the present invention is simple in structure, the quantity of collection signal is many, and the degree of accuracy of this monitoring system has been improved more than 5%, and the monitoring method that the present invention simultaneously proposes is simple to operate, can make the technician grasp at an easy rate operation steps.
The accompanying drawing explanation
The structural representation that Fig. 1 is 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
All install a voltage transformer (VT) 1 and a current transformer 2 in each acquisition channel, 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 all is connected with a voltage signal input end of signal processor 3, the secondary side of each current transformer 2 all is 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 that the digital signal output end of embedded board computer 11 is transient waveform storage digitizing.
In present embodiment, characteristics for the synchronous input of the voltage and current semaphore request for a plurality of electric pressures in electric system, the acquisition channel number is designed to minimum 16 tunnels, the characteristics that while is different according to the frequency of operation of various electrical equipments in electric system, 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 the PC network, data communication port adopts the TCP/IP communications protocol, by the IP address of transient waveform storage digitizing is set, can realize that real-time control apparatus carries out data recording, analysis, demonstration and transfer function by the browser on the PC network, when having guaranteed that this device can rig-site utilization, also can realize carrying out strange land control and data transmission by the PC network.
Embodiment two, in conjunction with Fig. 1, this embodiment is described, this embodiment is with the difference of the described a kind of electric system transient waveform storage monitoring system of embodiment one, 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 signals input end of data processor 5, the data processing signals output terminal 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 that the digital signal output end of data derived circuit 7 is 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, carry out the cycle index data according to the fixing steady-state quantity to voltage deviation, voltage fluctuation and flickering, tri-phase unbalance factor of the every country standard of electric energy quality monitoring 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, the 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 be calculated superpotential multiple and frequency, harmonic wave qualification rate, Short Term Flicker, flickering while growing, voltage deviation statistics and Voltage unbalance; Simultaneously, the WEB service in embedded board computer 11 can provide data analysis and remote control function, and the FTP service can provide the transporting function of data, and the MySql database service can provide the storage of steady state voltage amount.
The difference of the described a kind of electric system transient waveform storage monitoring system of embodiment three, this embodiment and embodiment one is, it also comprises external power source, and described external power source is for being powered 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 characteristics of electric system ubiquity voltage, the no-load voltage ratio of step-down isolation transformer is designed to 250:240.
The difference of the described a kind of electric system transient waveform storage monitoring system of embodiment four, this embodiment and embodiment one is, described transmission line employing shielded twisted pair.
The difference of the described a kind of electric system transient waveform storage monitoring system of embodiment five, this embodiment and embodiment one is; it also comprises lightning protection circuit; described lightning protection circuit is installed in the acquisition channel front end, for transient waveform storage digitizing, at gatherer process, carries out lightning protected.
The difference of the monitoring method of the described a kind of electric system transient waveform storage of embodiment six, this embodiment and embodiment two monitoring system is, it is realized by following steps:
Step 1, the initial value of voltage starting value and the data recording time span of each acquisition channel is set in parameter setting circuit 9, and the initial value of the voltage starting value of described each acquisition channel and data recording time span is transferred in data comparator 8;
The signal of step 3,3 pairs of voltage transformer (VT) of signal processor, 1 summation current transformer 2 secondary sides is processed, and the signal after processing is transferred to data acquisition card 4;
Signal after processing in step 4,4 pairs of step 3 of data acquisition card is gathered, the data volume gathered when data acquisition card 4 reaches half of data total amount of data acquisition card 4, be data acquisition card 4 data volumes while reaching half-full, the half-full signal data of data acquisition card 4 is transferred to data processor 5;
The signal data that data acquisition card 4 in step 5,5 pairs of step 4 of data processor gathers is processed;
Data transmission after step 6, data processor 5 will be processed is to data comparator 8;
The data of step 8, all collection signals while the voltage peak of the collection signal in any one acquisition channel being greater than to the voltage starting value of initial setting up of this acquisition channel are carried out data recording by data recording circuit 10, and, using the upper half-full data in data acquisition card 4 as the home record data, the time span of record data is identical with the data recording time span of initial setting up;
Claims (6)
1. an electric system transient waveform is stored monitoring system, it is characterized in that, it comprises transient waveform storage digitizing and PC, and 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)
All install a voltage transformer (VT) (1) and a current transformer (2) in each acquisition channel, 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) all is connected with a voltage signal input end of signal processor (3), the secondary side of each current transformer (2) all is 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 that the digital signal output end of embedded board computer (11) is 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 signals input end of data processor (5), the data processing signals output terminal 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 that the digital signal output end of data derived circuit (7) is 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 and 2, is characterized in that, it also comprises external power source, and described external power source is for being powered to transient waveform storage digitizing.
4. a kind of electric system transient waveform storage monitoring system according to claim 3, is characterized in that, described transmission line adopts shielded twisted pair.
5. according to claim 1,2 or 4 described a kind of electric system transient waveform storage monitoring systems; it is characterized in that; it also comprises lightning protection circuit, and described lightning protection circuit is installed in the acquisition channel front end, for transient waveform storage digitizing, at gatherer process, carries out lightning protected.
6. the monitoring method of a kind of electric system transient waveform storage monitoring system according to claim 2, is characterized in that, it is realized by following steps:
Step 1, the initial value of voltage starting value and the data recording time span of each acquisition channel is set in parameter setting circuit (9), and the initial value of the voltage starting value of described each acquisition channel and data recording time span is transferred in data comparator (8);
Step 2, the signal to be collected of electric system is connected with the primary side of voltage transformer (VT) (1) summation current transformer (2) in acquisition channel;
Step 3, signal processor (3) are processed the signal of voltage transformer (VT) (1) summation current transformer (2) secondary side, and the signal after processing is transferred to data acquisition card (4);
Step 4, data acquisition card (4) are gathered the signal after processing in step 3, the data volume gathered when data acquisition card (4) reaches half of data total amount of data acquisition card (4), be data acquisition card (4) data volume while reaching half-full, the half-full signal data of data acquisition card (4) is transferred to data processor (5);
The signal data that step 5, data processor (5) gather the data acquisition card in step 4 (4) is processed;
Data transmission after step 6, data processor (5) will be processed is to data comparator (8);
Step 7, the initial value arranged in the data after the processing obtained in step 5 and parameter setting circuit (9) is compared in data comparator (8), relatively whether the voltage peak of the collection signal in any one acquisition channel is greater than the voltage starting value of the initial setting up of this acquisition channel, be, perform step eight, no, circulation execution step four;
The data of step 8, all collection signals while the voltage peak of the collection signal in any one acquisition channel being greater than to the voltage starting value of initial setting up of this acquisition channel are carried out data recording by data recording circuit (10), and, using the upper half-full data in data acquisition card (4) as the home record data, the time span of record data is identical with the data recording time span of initial setting up;
Step 9, the data transmission that record is completed are processed to data processor (5), and the data transmission after processing is carried out to the data storage to data-carrier store (6), data-carrier store (6) by the data transmission of storage to data derived circuit (7);
Step 10, data derived circuit (7) are derived the data of storage this data result is transferred in PC and shown, complete the observation process to electric system.
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