CN102830295B - Detecting system and detecting method of digital transformer substation protecting loop - Google Patents
Detecting system and detecting method of digital transformer substation protecting loop Download PDFInfo
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Abstract
The invention discloses a detecting system and a detecting method of a digital transformer substation protecting loop. The system comprises a control terminal device and a small signal outputting device which are connected wirelessly. The detecting method comprises the following steps: a protecting loop is connected, the communication state is checked automatically, the communication state is confirmed, parameter setup is carried out, output signals are transmitted synchronously, a protecting device takes action to transmit a trip signal to an intelligent operating box after receiving the signals; the small signal outputting device transmits the received trip signal to the control terminal device; and the control terminal device processes the signal so as to end the detection process. By using a wireless synchronization technology and by adopting the principal and subordinate arrangement, the data synchronization is realized for devices at different places, and the verification work of a complex loop such as a generator transformer and the like is solved effectively.
Description
Technical field
The present invention relates to a kind of detection system and detection method of digital transformer station protection circuit.
Background technology
Along with putting into operation of digital transformer substation, relay protection examination work is made also to there occurs huge transformation.Traditional microcomputer based relay protective device divided data collection, logic and execution three parts; collection and execution part are then transferred to process layer by the protective relaying device of digital transformer substation; intelligent cell (IED) is logical gate wherein, is placed in wall.What change is relay protection examination mode thereupon, and traditional check system is no longer applicable to digital transformer substation.
At present, digital transformer substation is also in research and probe, trial run is accumulated experience the stage, and the constituted mode of different digital transformer substations is different, and its adjustment method is also not quite similar.For different situations, the present method of inspection mainly contains:
1. traditional tester adds the mode of merge cells, traditional tester is utilized to do signal generating source, carry out the AC signal of collecting test instrument by a data collector and convert the signal output format being equivalent to current sensor (ETA, ETV) to and deliver to merge cells.Like this, the adjustment method of whole debugging just can use some traditional means, the logic function inspection part especially protected.This kind of mode debugs having some limitations property.Such as, because the output of protection is Digital output, if protection does not provide hard contact, can not closed loop test be carried out, certainly also cannot debug actuation time, more cannot test some communication issues (as frame losing, mess code, transmission delay etc.); The problems such as synchronous then also will be related to differential protection etc.
2. the mode of total digitalization test, total digitalization test needs to analyze whole digitized process.Brand-new digital test instrument is designed and developed out according to the communication standard of IEC61850; this testing tool should export digitized exchange of information and open into information; the action message of standard compliant protection and switch intelligent cell can be received simultaneously, and control with this, test whole process.
Above-mentioned two kinds of methods all can not the inspection of the whole protective loop of complete solution, and only can test to intelligent cell (IED), other such as merge cells and intelligent operation boxes etc. there is no field test means, also have no idea to carry out whole group to whole loop.And cannot effectively check especially as the protection that main transformer, female difference etc. have a complicated external loop.Therefore, how to realize the inspection of whole protective loop, become the major issue that digital transformer substation is safeguarded.
Summary of the invention
The object of the invention is to overcome the defect of prior art and a kind of detection system and detection method of digital transformer station protection circuit are provided; the present invention utilizes wireless synchronization technology; arranged by principal and subordinate; data syn-chronization is realized to the device being placed on different places, effectively can solve the inspection work of the complicated loops such as such as main transformer.
The technical scheme realizing above-mentioned purpose is:
The detection system of a kind of digital transformer station protection circuit of one of the present invention; described detection system is connected main transformer protection device by high and low pressure side merge cells with high and low pressure side intelligent operation box; described detection system comprises a small-signal output device and a control end device of wireless connections, wherein:
Described small-signal output device exports low-pressure side Small Current Signal to described low-pressure side merge cells, receives the trip signal of described low-pressure side intelligent operation box transmission, and this trip signal is sent to described control end device;
Described control end device sends control command to described small-signal output device, export high voltage side current light signal to described high-pressure side merge cells, and with the trip signal being received from the transmission of described small-signal output device, analyzing and processing is carried out to the trip signal being received from the intelligent operation box transmission of described high-pressure side.
The detection system of above-mentioned digital transformer station protection circuit; wherein; one first power module, a light signal collection module, a light signal output module and one first wireless signal transmission module that described control end device comprises one the one CPU, is connected respectively with a CPU; described first power module also connects described light signal collection module, and a described CPU realizes the control to described light signal collection module, light signal output module and the first wireless signal transmission module.
The detection system of above-mentioned digital transformer station protection circuit; wherein; a second source module, a Collection module, a small-signal output module and one second wireless signal transmission module that described small-signal output device comprises one the 2nd CPU, is connected respectively with the 2nd CPU; described second source module also connects described small-signal output module, and described 2nd CPU realizes the control to described Collection module, small-signal output module and the second wireless signal transmission module.
The detection method of a kind of digital transformer station protection circuit of the present invention two, comprises the following steps:
Step S0, by the light signal output end of described control end device by high-pressure side merge cells described in Fiber connection, the private cable of this control end device is connected to intelligent operation box; The output terminal of described small-signal output device is connected described low-pressure side merge cells by small-signal cable, and opening of this small-signal output device connects low-voltage intelligent control box into signal cable;
Step S1, automatically detects the communication state between described control end device and described small-signal output device, confirms that whether the wireless telecommunications between two table apparatus are normal;
Step S2, the communication between described control end device and described small-signal output device is abnormal, then return step S1, normally then continue;
Step S3, described control end device is arranged the output valve of this control end device and described small-signal output device respectively, and arranges the synchronous triggered time, and send instructions to described small-signal output device by wireless telecommunications;
Step S4, after described small-signal output device receives operational order, the value pre-set by the synchronous triggered time arranged and described control end device synchronism output;
Step S5, described main protection receives output signal, after reaching working value, sends trip signal to high and low pressure side intelligent operation box;
Step S6, described control end device and small-signal output device receive the trip signal of high and low pressure side intelligent operation box respectively, and described small-signal output device is transferred to described control end device the signal wireless received;
Step S7, described control end device carries out analyzing and processing to the signal accepted, and stops checkout procedure.
The detection method of above-mentioned digital transformer station protection circuit; wherein; high voltage side current light signal and low-pressure side Small Current Signal is respectively through the output valve of described control end device and small-signal output device in step S4; described high voltage side current light signal is by described high-pressure side merge cells, and described low-pressure side Small Current Signal is by described low-pressure side merge cells.
The invention has the beneficial effects as follows: the present invention utilizes wireless communication technique, the master slave relation between definition verifying attachment, realizes data syn-chronization, can solve the interlock inspection of such as main transformer protection (its process layer is not or not same place); The present invention completely can realize digital transformer substation from wall to the repertoire comprehensive test of process layer; Fault simulation and analysis of operative action are implemented in the constrained input loop that the present invention is combined unit and intelligent operation box at process layer, the correctness of energy check digitization protection bulk loop function (comprising intelligent IED to adjust and logic).
Accompanying drawing explanation
Fig. 1 is the application system figure of the detection system of the digital transformer station protection circuit of one of the present invention;
Fig. 2 is the structural drawing of the control end device of the detection system of the digital transformer station protection circuit of one of the present invention;
Fig. 3 is the structural drawing of the small-signal output device of the detection system of the digital transformer station protection circuit of one of the present invention;
Fig. 4 is the schematic diagram of the detection method of the digital transformer station protection circuit of the present invention two;
Fig. 5 is the workflow diagram of the detection method of the digital transformer station protection circuit of the present invention two.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Refer to Fig. 1 and composition graphs 2, Fig. 3; the detection system of a kind of digital transformer station protection circuit of one of the present invention; detection system 1 is connected main transformer protection device 3 by high-pressure side merge cells 21, low-pressure side merge cells 22, high-pressure side intelligent operation box 41 with low-pressure side intelligent operation box 42; detection system 1 comprises control end device M and the small-signal output device S2 of wireless connections, wherein:
Small-signal output device S2 exports low-pressure side Small Current Signal to low-pressure side merge cells 22, receives the trip signal that low-pressure side intelligent operation box 42 transmits, and this trip signal is sent to control end device M;
Control end device M sends control command to small-signal output device S2, export high voltage side current light signal to high-pressure side merge cells 21, and with the trip signal being received from small-signal output device S2 transmission, analyzing and processing is carried out to the trip signal being received from high-pressure side intelligent operation box 41 transmission.
The first power module 52, light signal collection module 53, light signal output module 54 and the first wireless signal transmission module 55 that control end device M comprises a CPU51, is connected respectively with a CPU51, first power module 52 also connects the control of light signal collection module the 53, one CPU51 realization to light signal collection module 53, light signal output module 54 and the first wireless signal transmission module 55.
Second source module 62, Collection module 63, small-signal output module 64 and the second wireless signal transmission module 65 that small-signal output device S2 comprises the 2nd CPU61, is connected respectively with the 2nd CPU61, second source module 62 also connects the control of small-signal output module the 64, two CPU61 realization to Collection module 63, small-signal output module 64 and the second wireless signal transmission module 65.
Refer to Fig. 5 and composition graphs 4, the detection method of a kind of digital transformer station protection circuit of the present invention two, comprises the following steps:
Step S0, by the light signal output end of control end device M by Fiber connection high-pressure side merge cells 21, the private cable of control end device M connects high-pressure side intelligent operation box 41; The output terminal of small-signal output device S2 is connected opening of low-pressure side merge cells 22, small-signal output device S2 by small-signal cable and connects low-pressure side intelligent operation box 42 into signal cable;
Step S1, the communication state between Automatic Detection and Control end device M and small-signal output device S2, confirms that whether the wireless telecommunications between two table apparatus are normal;
Step S2, the communication between control end device M and small-signal output device S2 is abnormal, then return step S1, normally then continues;
Step S3, control end device M is arranged the output valve of control end device M and small-signal output device S2 respectively, and arranges the synchronous triggered time, and wirelessly sends instructions to small-signal output device S2;
Step S4, after small-signal output device S2 receives operational order, the value pre-set by the synchronous triggered time arranged and control end device M synchronism output;
Step S5, main protection 3 receives output signal, after reaching working value, sends trip signal to high-pressure side intelligent operation box 41 and low-pressure side intelligent operation box 42;
Step S6, control end device M and small-signal output device S2 receive the trip signal of high-pressure side intelligent operation box 41 and low-pressure side intelligent operation box 42 respectively, and small-signal output device S2 is transferred to control end device M the signal wireless received;
Step S7, control end device M carry out analyzing and processing to the signal accepted, and stop checkout procedure.
In step s 4 which, output valve through control end device M and small-signal output device S2 is respectively high voltage side current light signal and low-pressure side Small Current Signal, high voltage side current light signal is by high-pressure side merge cells 21, and low-pressure side Small Current Signal is by low-pressure side merge cells 22.
In sum; the invention discloses a kind of detection system and detection method of digital transformer station protection circuit, utilize wireless communication technique, the master slave relation between definition verifying attachment; realize data syn-chronization, intactly realize digital transformer substation from wall to the repertoire comprehensive test of process layer.
Above-described embodiment is available to be familiar with person in the art to realize or to use of the present invention; those skilled in the art can be without departing from the present invention in the case of the inventive idea; various modifications or change are made to above-described embodiment; thus protection scope of the present invention not limit by above-described embodiment, and should be the maximum magnitude meeting the inventive features that claims are mentioned.
Claims (5)
1. the detection system of a digital transformer station protection circuit; described detection system is connected main transformer protection device by high and low pressure side merge cells with high and low pressure side intelligent operation box; it is characterized in that; described detection system comprises a small-signal output device and a control end device of wireless connections, wherein:
Described small-signal output device exports low-pressure side Small Current Signal to described low-pressure side merge cells, receives the trip signal of described low-pressure side intelligent operation box transmission, and this trip signal is sent to described control end device;
Described control end device sends control command to described small-signal output device, export high voltage side current light signal to described high-pressure side merge cells, and with the trip signal being received from the transmission of described small-signal output device, analyzing and processing is carried out to the trip signal being received from the intelligent operation box transmission of described high-pressure side.
2. the detection system of digital transformer station protection circuit according to claim 1; it is characterized in that; one first power module, a light signal collection module, a light signal output module and one first wireless signal transmission module that described control end device comprises one the one CPU, is connected respectively with a CPU; described first power module also connects described light signal collection module, and a described CPU realizes the control to described light signal collection module, light signal output module and the first wireless signal transmission module.
3. the detection system of digital transformer station protection circuit according to claim 1, is characterized in that,
A second source module, a Collection module, a small-signal output module and one second wireless signal transmission module that described small-signal output device comprises one the 2nd CPU, is connected respectively with the 2nd CPU, described second source module also connects described small-signal output module, and described 2nd CPU realizes the control to described Collection module, small-signal output module and the second wireless signal transmission module.
4. a detection method for the detection system of digital transformer station protection circuit as claimed in claim 1, is characterized in that, comprise the following steps:
Step S0, by the light signal output end of described control end device by high-pressure side merge cells described in Fiber connection, the private cable of this control end device is connected to intelligent operation box; The output terminal of described small-signal output device is connected described low-pressure side merge cells by small-signal cable, and opening of this small-signal output device connects low-voltage intelligent control box into signal cable;
Step S1, automatically detects the communication state between described control end device and described small-signal output device, confirms that whether the wireless telecommunications between two table apparatus are normal;
Step S2, the communication between described control end device and described small-signal output device is abnormal, then return step S1, normally then continue;
Step S3, described control end device is arranged the output valve of this control end device and described small-signal output device respectively, and arranges the synchronous triggered time, and send instructions to described small-signal output device by wireless telecommunications;
Step S4, after described small-signal output device receives operational order, the value pre-set by the synchronous triggered time arranged and described control end device synchronism output;
Step S5, described main transformer protection device receives output signal, after reaching working value, sends trip signal to high and low pressure side intelligent operation box;
Step S6, described control end device receives the trip signal of high-pressure side intelligent operation box, and small-signal output device receives the trip signal of low-pressure side intelligent operation box, and described small-signal output device is transferred to described control end device the signal wireless received;
Step S7, described control end device carries out analyzing and processing to the signal accepted, and stops checkout procedure.
5. the detection method of the detection system of digital transformer station protection circuit according to claim 4; it is characterized in that; high voltage side current light signal and low-pressure side Small Current Signal is respectively through the output valve of described control end device and small-signal output device in step S4; wherein; described high voltage side current light signal is by described high-pressure side merge cells, and described low-pressure side Small Current Signal is by described low-pressure side merge cells.
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| CN107064780A (en) * | 2017-06-23 | 2017-08-18 | 上海电力通信有限公司 | A kind of circuit detecting method of digital transformer substation |
| CN109884568B (en) * | 2019-01-17 | 2021-09-07 | 国网浙江省电力有限公司金华供电公司 | Main transformer sampling synchronism verification device and testing method for intelligent substation |
| CN113064011B (en) * | 2021-03-25 | 2023-09-15 | 温州电力建设有限公司 | Automatic test method for protection operation loop |
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