CN102565592A - Technology-systematization verification short-circuit test method for intelligent substation - Google Patents
Technology-systematization verification short-circuit test method for intelligent substation Download PDFInfo
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Abstract
The invention discloses a technology-systematization verification short-circuit test method for an intelligent substation, which comprises the steps of: (1) arranging three fault points in the substation according to the protection action range of each main equipment of the tested substation; (2) allowing one main transformer special for the tested substation to be vacant at a power feed side substation and setting time-limit protection on a short-circuit grounded switch; (3) adopting a serial-connection grounding manner through a reactor and a grounding clearance in the test; (4) acquiring test data through a network in the substation; (5) judging the transferring property of a mutual inductor by comparing an artificial graphic with the record waveforms and the sampling value messages of various mutual inductors at fault, and verifying the influence of the mixed using of different mutual inductors on differential protection; (6) placing three shielded cables with different grounding manners from a terminal box to a control room on a test site and recording interference wave forms by an oscilloscope with high sampling rate; and (7) placing two 2M-port communication cables with different grounding and operating manners in the test and verifying the anti-interference property of a communication interface. When a system physical fault occurs, links which are necessary to be detected, for the whole-substation system and the intelligent electronic equipment of the intelligent substation, as well as the test method are designed; and comprehensive guide experience is provided for the future empirical test of a system in the substation.
Description
Technical field
The present invention relates to a kind of intelligent substation technological system real example short-circuit test method.
Background technology
Intelligent transformer station divides layer building based on intelligent primary equipment and networked secondary device; Be based upon on the IEC61850 communication specification basis; Can realize information sharing of intelligent electric equipment room and interoperability in the transformer station, be the application of a kind of brand-new technology system and technical products.
The smart machine of present intelligent transformer station generally is to test through methods such as laboratory envelope test, dynamic simulation test, EMC detections; But system-level dynamic model; Especially the whole station all system-level performance test under a real electric network fault situation still lacks the Validity Test means; Therefore during the system failure, the performance index of whole station relay protection, automated system, communication system, and the performance of all kinds of intelligent electronic devices can't obtain checking with the performance that cooperatively interacts.
Summary of the invention
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The object of the present invention is to provide a kind of intelligent substation technological system real example short-circuit test method; Promptly through reactor and gap with specified vol; With grounded screen in the intelligent substation 110kV system access station, form real 110kV electrical network earth fault, through testing tool and method of testing; The operating condition and the index parameter of whole station system of register system fault moment and all kinds of intelligent electronic devices are to analyze the overall performance of intelligent substation.
In order to achieve the above object, technical scheme of the present invention is:
A kind of intelligent substation technological system real example short-circuit test method comprises the steps: 1) according to each Main Equipment Protection actuating range of testing station, in the station, establish 110kV circuit lead-in wire, 110kV bus, main transformer 110kV three trouble spots that go between; 2) send electric side transformer station to vacate a main transformer and specialize in test transformer station, the testing station adopts 110kV, 10kV bus fanout operation mode, and the switch setting of short circuit ground connection is protection in limited time; 3) mode through reactor and ground connection gap series connection ground connection is adopted in test; 4) through network acquisition test data in the station; Comprise that offered load rate, GOOSE are (towards the transformer substation case of general object; Down with) with SV (sampled value, down with) message delay, SV message at interval uniformity coefficient, fault moment SV message synchronously, install to the time precision measured data; 5) judge mutual inductor progress of disease performance through artificial figure comparison all kinds of mutual inductor wave recordings of fault moment and sampled value message; Through waveform stack or each side current value vector addition method computer differential protection external area error time difference flow valuve, verify of the influence of dissimilar mutual inductor mixing application to differential protection; 6) shielded cable of three different earthing modes of terminal box to pulpit placement from the test site; With high sampling rate oscillograph recording interference waveform; Through relatively cable core and screen layer induced voltage and control loop induction current are big or small, the interference free performance of three kinds of different modes of checking; 7) the 2M mouth communication cable of the two different ground connection of placement and the method for operation in the test is with high sampling rate oscillograph recording interference waveform, through reading the bit error rate and telecommunication cable interference voltage, checking communication port interference free performance.
Described step is specially: 1) according to each Main Equipment Protection actuating range of testing station (transformer station 1 in the accompanying drawing), in the station, establish three trouble spots: 110kV inlet wire lead-in wire, and actuating range is a 110kV circuit optical fiber differential protection; 110kV bus, actuating range are the 110kV bus differential protection; Main transformer 110kV lead-in wire place (the main transformer lead-in wire is between the pure smooth CT), actuating range is the main transformer differential protection; Line fault, bus-bar fault, main transformer fault have been contained in above-mentioned trouble spot, can verify the performance of interior relay protection in station and automatic safety device comprehensively;
2) test is sent electric side 220kV transformer station to vacate a 110kV bus and is specialized in test transformer station, and the testing station adopts 110kV, 10kV bus fanout operation mode, and pilot system and normal operational system are effectively isolated; The generator of short circuit grounding switch as test is installed, in the switch setting protection in limited time of short circuit ground connection (switch close a floodgate back 0.3 second would trip) as the test back-up protection; Calculating fault moment system stability meets the demands, non-failure system is supplied power to meet and satisfied quality of power supply requirement;
3) mode through reactor and ground connection gap series connection ground connection is adopted in test; Gap device adopts the ground connection band steel of 80mm * 6mm; Keep the clearance distance about suitable 5cm with the ground connection steel plate; The upper end is adopted screw and earthing reactor to draw bronze medal and is fixed, can be according to short-circuit current size adjusting play distance during test;
4) test figure is through network collection in the station, and wherein whole station network performance index obtains through the Network records analyser; The protective device action message is obtained from protection information substation through the station level network; SV sampling message obtains from fault oscillograph through process layer net, need not device is carried out direct control, and data read process does not influence operation; Be test GOOSE, the time-delay of SV message Network Transmission, merge unit delivery outlet increase optical splitter at main transformer protection device and main transformer second cover respectively, draw Optical Access Network network recorder analyser, through Network records analyser record data;
5) test has increased a conventional current mutual inductor and a conventional voltage transformer (VT) at short circuit earth point place, in order to compare the progress of disease property difference of conventional mutual inductor and electronic mutual inductor.Judge mutual inductor progress of disease performance through artificial figure comparison all kinds of mutual inductor wave recordings of fault moment and sampled value message; Through waveform stack or each side current value vector addition method computer differential protection external area error time difference flow valuve, verify of the influence of dissimilar mutual inductor mixing application to differential protection.
6) shielded cable of three different earthing modes of terminal box to pulpit placement from the test site: first cable is all grounded screen (the inner screening cable standard of standing connects method) of screen layer two; Second cable be screen layer with regard to cabinet side joint earth mat, protection screen side joint secondary equipotential net; The 3rd cable is that screen layer two all is connected on secondary equipotential net.Write down screen layer current waveform and cable core voltage-to-ground waveform respectively with the high sampling rate oscillograph, through relatively cable core and screen layer induced voltage and control loop induction current are big or small, the interference free performance of three kinds of different modes of checking;
7) place the communication cable of two 2M mouths in the test, first empty cable of communication 2M mouth and grounded screen of screen layer one first-class current potential net; Second cable communication 2M mouth inserts all grounded screen of operation screen cable shield two, and on the 2M mouth of operation, inserts Error Detector.Write down screen layer current waveform, cable core voltage-to-ground waveform respectively with high sampling rate oscillograph (DL750), the maximum instantaneous value of noisy data when analyzing short trouble.Through reading the bit error rate and telecommunication cable interference voltage, checking communication port interference free performance.
Beneficial effect of the present invention is: the present invention is according to the system safety operation needs; Designed rational system operation mode; And, designed the short circuit mode of 110kV through reactor and grounding through arc according to the test request of intelligent substation, selected three representative short dots; And having designed network test method, dissimilar mutual inductor progress of disease performance test methods, the anti-interference method of testing of system, the systematic intelligent substation of having tested is in physical fault whole station performance index constantly.The present invention proposes the method for the intelligent 110kV man-made short-circuit of transformer station test; System operation mode arrangement method, the system of selection of short circuit mode and the short dot method to set up of test have been designed; When having designed system's physical fault; The link and the method for testing that must detect of whole station system of intelligent transformer station and intelligent electronic device provide comprehensive guiding experience to system's real example test in standing from now on.
Description of drawings
Fig. 1 is a 110kV man-made short-circuit pilot system method of operation synoptic diagram in the embodiment of the invention;
1 refers to transformer station's 1 10kV mother stock switch among Fig. 1; 2 refer to transformer station's 1 10kV II section bus; 3 refer to the 1#2 of transformer station main transformer 10kV mother stock switch; 4 refer to the 1#2 of transformer station main transformer; 5 refer to transformer station's 1 110kV II section bus; 6 refer to transformer station's 1 circuit, 2 switches; 7 refer to transformer station's 1 10kV I section bus; 8 refer to the 1#1 of transformer station main transformer 10kV switch; 9 refer to the 1#1 of transformer station main transformer; 10 refer to transformer station's 1 110kV I section bus; 11 refer to transformer station's 1 circuit, 1 switch; 12 transformer stations 1 refer to the 110kV bridge switch; 13 refer to circuit 2; 14 refer to transformer station's 3 circuits, 2 switches; 15 refer to that 3 110kV of transformer station are secondary female; 16 refer to transformer station's 3 110kV bus connection switches; 17 refer to transformer station's 3 #2 main transformers; 18 refer to transformer station's 3 #1 main transformers; 19 refer to that 3 110kV of transformer station are just female; 20 fingering lines 1; 21 refer to that 2 110kV of transformer station are secondary female; 22 refer to transformer station's 2 inlet wires, 1 switch; 23 refer to the 110kV bus connection switch; 24 refer to transformer station's 2 #1 main transformers; 25 refer to transformer station's 2 #2 main transformers; 26 refer to that 2 110kV of transformer station are just female; 27 refer to 110kV inlet wire lead short circuit point; 28 refer to main transformer 110kV lead short circuit point; 29 refer to 110kV busbar short-circuit point; 30 refer to transformer station 1; 31 refer to transformer station 2; 32 refer to transformer station 3;
Fig. 2 is a 110kV short dot mode of connection synoptic diagram in the embodiment of the invention;
33 refer to the 110kV bridge switch among Fig. 2; 34 refer to 110kV I section bus; The interim mutually plug-in strip of 35 fingering line 1A; 36 refer to the pure smooth mutual inductor of #1 main transformer; 37 refer to the #1 main transformer; 38 refer to the interim mutually plug-in strip of #1 main transformer 110kV lead-in wire A; 39 refer to the interim mutually plug-in strip of 110kV I section bus A; 40 refer to interim conventional voltage transformer (VT); 41 refer to the temporary short-circuit switch; 42 refer to interim conventional current mutual inductor; 43 current-limiting reactors; 44 IDSs; 45 refer to circuit 1 electronic mutual inductor; 46 refer to circuit 1 switch; 47 refer to 110kV II section bus.
Embodiment
Embodiment 1
A kind of intelligent substation technological system real example short-circuit test method of present embodiment:
1) according to each Main Equipment Protection actuating range of transformer station in the accompanying drawing 1 30 (test transformer station), in the station, establish three trouble spots: 110kV inlet wire lead short circuit point 27, actuating range are 110kV circuit optical fiber differential protection; 110kV busbar short-circuit point 29, actuating range are the 110kV bus differential protection; Main transformer 110kV lead short circuit point 28, actuating range are the main transformer differential protection;
2) transformer station's 2 #2 main transformers 25 are vacated 2 110kV of transformer station secondary female 21 and are specialized in experiment power supply; Transformer station's 2 #2 main transformers 25 and inlet wire 1 20 secondary female operations; Transformer station's 2 #1 main transformers 24 and the positive female operation of all the other 110kV circuits; Transformer station 1 30 adopts 110kV, 10kV bus fanout operation mode, and pilot system and normal operational system are effectively isolated.By the above-mentioned method of operation, through system stability after the system emulation result of calculation fault, the positive female electric voltage dropping of 2 110kV of transformer station is no more than 2%.The interim mutually plug-in strip 35 of inlet wire 1A, the interim mutually plug-in strip 39 of 110kV I section bus A, the interim mutually plug-in strip 38 of #1 main transformer 110kV lead-in wire A are installed, are used to switch short dot; The generators of temporary short-circuit switch 41 as test are installed, in temporary short-circuit switch setting protection in limited time (switch close a floodgate back 0.3 second would trip) as the test back-up protection;
3) mode of short dot extension line through temporary short-circuit switch 41, interim conventional current mutual inductor 42, current-limiting reactor 43 and gap 44 series connection ground connection adopted in test; Gap device adopts the ground connection band steel of 80mm * 6mm; Keep the clearance distance about suitable 5cm with the ground connection steel plate; The upper end is adopted screw and earthing reactor to draw bronze medal and is fixed, can be according to short-circuit current size adjusting play distance during test;
4) test figure is all through network collection, and wherein whole station network performance index and GOOSE, SV message obtain through the Network records analyser; The protective device action message is obtained through protection information substation; Fault waveform obtains through fault oscillograph, and all test figure collections all realize through network, need not direct control is carried out in protection and measure and control device, and data read process does not influence operation.Be test GOOSE, the time-delay of SV message Network Transmission, merge unit delivery outlet increase optical splitter at main transformer protection device and main transformer second cover respectively, draw Optical Access Network network recorder analyser, through Network records analyser record data.Evidence:
(1) stand in the network load factor remain unchanged basically before and after the fault.
(2) during fault, it is stable that the SV message flow keeps, and the GOOSE message amount increases to some extent, but the offered load rate is not exerted an influence; The message of burst has increased the networking stochastic queue time, causes SV, GOOSE message transfer time to increase to some extent, but the protection performance is not exerted an influence as yet.
(3) delay variation of SV message is little in the failure process, and is whole in ± 100us, and the relay protection action of this test is not had influence.
5) test has increased an interim conventional current mutual inductor 42 and an interim conventional voltage transformer (VT) 40 at short circuit earth point place, in order to compare the progress of disease property difference of conventional mutual inductor and electronic mutual inductor.Test is through fault moment wave recording and sampled value message; The difference stream that the protection of line differential protection, main transformer differential, bus differential protecting are produced when the external area error calculates through waveform stack or computed in software method, verifies influence and the technical feasibility thereof of dissimilar mutual inductor mixing application to differential protection.Evidence: found that in process of the test truncation, conditions of streaking have appearred in indivedual electronic mutual inductor waveforms, need improve.Poor flow analysis through to the differential protection external area error of different mutual inductor mixing application the time is found; The mixing application of different mutual inductors is not obvious to the differential protection influence; External area error time difference stream is little, ability action message during troubles inside the sample space, and the differential protection performance is normal.
6) shielded cable of three different earthing modes of terminal box to pulpit placement from the test site: first cable is all grounded screen (the inner screening cable standard of standing connects method) of screen layer two; Second cable be screen layer with regard to cabinet side joint earth mat, protection screen side joint secondary equipotential net; The 3rd cable is that screen layer two all is connected on secondary equipotential net; Write down screen layer current waveform and cable core voltage-to-ground waveform respectively with the high sampling rate oscillograph, shielded cable receives disturbed condition and three kinds of earthing modes is tested comparison during the voltage ripple of power network of status such as instant of failure.Evidence:
1) the electromagnetic environment measurement data meets the requirement of electric substation's electromagnetic environment evaluation criterion.
2) stand in the anti-interference effect of equipotential earth mat obvious, station cable anti-interference best results when screen layer connects the equipotential earth mat simultaneously in both sides.
7) place the communication cable of two 2M mouths in the test, first empty cable of communication 2M mouth and grounded screen of screen layer one first-class current potential net; Second cable communication 2M mouth inserts all grounded screen of operation screen cable shield two, and on the 2M mouth of operation, inserts Error Detector; Write down screen layer current waveform, cable core voltage-to-ground waveform respectively with high sampling rate oscillograph (DL750), the maximum instantaneous value of noisy data when analyzing short trouble.
Evidence: system short-circuit has produced certain disturbing effect to communication facilities and COM1, and error code appears in the 2M mouth, and communication facilities and COM1 Electro Magnetic Compatibility, communication facilities earthing mode remain further to be studied to improve.
Claims (2)
1. intelligent substation technological system real example short-circuit test method; It is characterized in that comprising the steps: 1) according to each Main Equipment Protection actuating range of testing station, in the station, establish 110kV inlet wire circuit, 110kV bus, main transformer 110kV three trouble spots that go between; 2) send electric side transformer station to vacate a main transformer and specialize in test transformer station, the testing station adopts 110kV, 10kV bus fanout operation mode, and the switch setting of short circuit ground connection is protection in limited time; 3) mode through reactor and ground connection gap series connection ground connection is adopted in test; 4) through network acquisition test data in the station, comprise offered load rate, GOOSE and SV message delay, SV message at interval uniformity coefficient, fault moment SV message synchronously, device to the time precision measured data; 5) judge mutual inductor progress of disease performance through artificial figure comparison all kinds of mutual inductor wave recordings of fault moment and sampled value message; Through waveform stack or each side current value vector addition method computer differential protection external area error time difference flow valuve, verify of the influence of dissimilar mutual inductor mixing application to differential protection; 6) shielded cable of three different earthing modes of terminal box to pulpit placement from the test site; With high sampling rate oscillograph recording interference waveform; Through relatively cable core and screen layer induced voltage and control loop induction current are big or small, the interference free performance of three kinds of different modes of checking; 7) the 2M mouth communication cable of the two different ground connection of placement and the method for operation in the test is with high sampling rate oscillograph recording interference waveform, through reading the bit error rate and telecommunication cable interference voltage, checking communication port interference free performance.
2. a kind of intelligent substation technological system real example short-circuit test method as claimed in claim 1; It is characterized in that described step is specially: 1) according to each Main Equipment Protection actuating range of testing station; In the station, establish three trouble spots: 110kV inlet wire circuit, actuating range are 110kV circuit optical fiber differential protection; 110kV bus, actuating range are the 110kV bus differential protection; Main transformer 110kV lead-in wire place, actuating range is the main transformer differential protection; Line fault, bus-bar fault, main transformer fault have been contained in above-mentioned trouble spot, can verify the performance of interior relay protection in station and automatic safety device comprehensively;
2) test is sent electric side 220kV transformer station to vacate a main transformer and is specialized in test transformer station, and with other main transformer fanout operation, the testing station adopts 110kV, 10kV bus fanout operation mode, and pilot system and normal operational system are effectively isolated; The generator of short circuit grounding switch as test is installed, in the switch setting protection conduct in limited time test back-up protection of short circuit ground connection; Calculating fault moment system stability meets the demands, non-failure system is supplied power to meet and satisfied quality of power supply requirement;
3) mode through reactor and ground connection gap series connection ground connection is adopted in test; Gap device adopts the ground connection band steel of 80mm * 6mm; Keep the clearance distance about suitable 5cm with the ground connection steel plate; The upper end is adopted screw and earthing reactor to draw bronze medal and is fixed, can be according to short-circuit current size adjusting play distance during test;
4) test figure is through network collection in the station, and wherein whole station network performance index obtains through the Network records analyser; The protective device action message is obtained from protection information substation through the station level network; SV sampling message obtains from fault oscillograph through process layer net, need not device is carried out direct control, and data read process does not influence operation; Be test GOOSE, the time-delay of SV message Network Transmission, merge unit delivery outlet increase optical splitter at main transformer protection device and main transformer second cover respectively, draw Optical Access Network network recorder analyser, through Network records analyser record data;
5) test has increased a conventional current mutual inductor and a conventional voltage transformer (VT) at short circuit earth point place, in order to compare the progress of disease property difference of conventional mutual inductor and electronic mutual inductor; Judge mutual inductor progress of disease performance through artificial figure comparison all kinds of mutual inductor wave recordings of fault moment and sampled value message; Through waveform stack or each side current value vector addition method computer differential protection external area error time difference flow valuve, verify of the influence of dissimilar mutual inductor mixing application to differential protection;
6) shielded cable of three different earthing modes of terminal box to pulpit placement from the test site: first cable is all grounded screen of screen layer two; Second cable be screen layer with regard to cabinet side joint earth mat, protection screen side joint secondary equipotential net; The 3rd cable is that screen layer two all is connected on secondary equipotential net; Write down screen layer current waveform and cable core voltage-to-ground waveform respectively with the high sampling rate oscillograph, through relatively cable core and screen layer induced voltage and control loop induction current are big or small, the interference free performance of three kinds of different modes of checking;
7) place the communication cable of two 2M mouths in the test, first empty cable of communication 2M mouth and grounded screen of screen layer one first-class current potential net; Second cable communication 2M mouth inserts all grounded screen of operation screen cable shield two, and on the 2M mouth of operation, inserts Error Detector; Write down screen layer current waveform, cable core voltage-to-ground waveform respectively with the high sampling rate oscillograph, the maximum instantaneous value of noisy data when analyzing short trouble; Through reading the bit error rate and telecommunication cable interference voltage, checking communication port interference free performance.
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| CN104345223A (en) * | 2013-07-26 | 2015-02-11 | 中核核电运行管理有限公司 | 6KV voltage transformer and secondary loop power supply monitoring method thereof |
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| CN106885959A (en) * | 2017-02-14 | 2017-06-23 | 山东中实易通集团有限公司 | The total firing test grounding switch of power plant electricity replaces the test method of short-circuiting copper bar |
| CN107607810A (en) * | 2017-09-01 | 2018-01-19 | 中铁电气化局集团有限公司 | A kind of rail traction supply current Distribution Test system |
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| CN106885959B (en) * | 2017-02-14 | 2020-03-06 | 山东中实易通集团有限公司 | Test method for replacing short-circuit copper bar by grounding knife switch in power plant electric main start test |
| CN107607810A (en) * | 2017-09-01 | 2018-01-19 | 中铁电气化局集团有限公司 | A kind of rail traction supply current Distribution Test system |
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