CN205301429U - Intelligent substation presses and becomes automatic nuclear phase ware of secondary - Google Patents
Intelligent substation presses and becomes automatic nuclear phase ware of secondary Download PDFInfo
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- CN205301429U CN205301429U CN201521066387.7U CN201521066387U CN205301429U CN 205301429 U CN205301429 U CN 205301429U CN 201521066387 U CN201521066387 U CN 201521066387U CN 205301429 U CN205301429 U CN 205301429U
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- 230000005611 electricity Effects 0.000 abstract 3
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- 239000004020 conductor Substances 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses an intelligent substation presses and becomes automatic nuclear phase ware of secondary, including operation face and box, the operation face is installed on the box, has two sets of wiring jacks, a change over switch and two at least voltmeters on the operation face, has the relay in the box, and two sets of wiring jacks all include A looks jack, B looks jack, C looks jack and zero line jack, and the output of wiring jack is connected with the input electricity of relay, and the output of relay is connected with the input of voltmeter electricity, and the control end and the change over switch electricity of relay are connected. The utility model discloses an all measurement function when intelligent substation presses and becomes automatic nuclear phase ware of secondary can realize two sets of pressures change secondary nuclear phase have solved present intelligent substation and have pressed a difficult problem that becomes the secondary nuclear phase, reduce a large amount of in -site measurements, improve work efficiency, reduce artificial mistake, improved the security performance.
Description
Technical field
This utility model relates to power system secondary nuclear phase field, specifically a kind of intelligent substation automatic phasing tester of buckling secondary that newly-built transformer station carries out the work of buckling secondary nuclear phase when putting into operation.
Background technology
Winding of voltage transformer is connected to primary system, is equivalent to the transformator of a secondary open circuit, and their secondary load changes all without the relevant voltage affecting primary system. Acting as of voltage transformer: the high voltage of primary circuit is transferred to the normal low voltage of secondary circuit (being generally 100V) by (1), makes measurement instrument and protection device standardization, makes secondary device light structure, low price; (2) make secondary circuit that low-voltage can be adopted to control cable, and make wiring in screen simple, easy for installation, it may be achieved a distant place controls and measures; (3) making secondary circuit do not limited by primary circuit, wiring is flexible, safeguards, debugs conveniently; (4) make secondary and a high-pressure section isolation, and secondary can set earth point, it is ensured that secondary device and personal safety.
The step of buckling secondary nuclear phase includes:
One, with power supply nuclear phase: with power supply nuclear phase, what is called refers to that two groups of voltage transformers are connected on same power supply point, the difference between voltage transformer secondary side Same Name of Ends and Same Name of Ends voltage, Same Name of Ends and non-same polarity voltage is measured. Whether correct its object is to two groups of voltage transformer secondary side wiring of detection, in 110kV and system above, voltage transformer is generally Y type wiring, now, voltage difference between Same Name of Ends and Same Name of Ends is 0V, voltage difference between Same Name of Ends and non-same polarity is 100V, then illustrating that same power supply nuclear phase is correct, namely Secondary Connections of PTs is correct.
Two, different power supply nuclear phase: so-called different power supply nuclear phase refers to that two groups of voltage transformers are connected on two different power supply points, measures the difference between voltage transformer secondary side Same Name of Ends and Same Name of Ends voltage, Same Name of Ends and non-same polarity voltage.The result that same power supply nuclear phase is correct should be obtained before different power supply nuclear phase, otherwise do not carry out the meaning of different power supply nuclear phase. The purpose of different power supply nuclear phase is in that to judge the phase place of primary voltage by measuring the secondary voltage of two groups of voltage transformers, if the voltage difference now between Same Name of Ends and Same Name of Ends is 0V, voltage difference between Same Name of Ends and non-same polarity is 100V, then illustrate that different power supply nuclear phase is correct, now we can determine whether that once phase place between two power supply points is correct, it is possible to paired running.
At present, during on-the-spot voltage transformer secondary side nuclear phase, there is no special measurement apparatus, simply carry out the measurement of every phase with digimer, check the amplitude between every two phase voltages, it is judged that whether Secondary Connections of PTs is correct. but owing to the spacing of two buckling under normal circumstances falls far short, need by very long wire measurement during measurement, and measurement process needs measure substantial amounts of data, phase voltage including each group of buckling, comparison voltage between line voltage and two groups of buckling, this just requires to need a large amount of personnel to participate in when measuring, under normal circumstances, two groups of buckling sides should have survey crew respectively, care provider and record keeping personnel, transmitter receiver or phone is also used to communicate when changing and measuring position, this just requires that this work should have at least 5 people to carry out (including work director, specific responsibility guardian), cause inefficiency, and personnel's dispersion is unfavorable for safety supervision.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of intelligent substation automatic phasing tester of buckling secondary, all of measurement function during two groups of buckling secondary nuclear phases can be realized, solve a difficult problem for current intelligent substation buckling secondary nuclear phase, reduce substantial amounts of in-site measurement, improve work efficiency; Reduce human error, improve security performance.
For solving above-mentioned technical problem, this utility model provides a kind of intelligent substation automatic phasing tester of buckling secondary, including operation face and casing, operation face is arranged on casing, operation face there are two groups of patch jacks, a permutator and at least two voltmeter, relay is had in casing, two groups of patch jacks all include A phase jack, B phase jack, C phase jack and zero line jack, the outfan of patch jack electrically connects with the input of relay, the outfan of relay electrically connects with the input of voltmeter, and the control end of relay electrically connects with permutator.
During test, A, B, C three-phase of two groups of voltages and zero line are inserted on the patch jack of the intelligent substation automatic phasing tester of buckling secondary by measure traverse line dish (i.e. long cable), so as to be respectively connected to the input of relay, then pass through permutator and control relay working voltage, control relay output end, so as to the voltage extremely corresponding voltmeter that output is required. Measurement result is directly observed by voltmeter.
The intelligent substation automatic phasing tester of buckling secondary of the present utility model, the measurement device such as voltmeter, relay is coupled together, use the gear switch of permutator, all of measurement function when realizing two groups of voltage buckling secondary nuclear phases by the control of relay, easy to use, it is capable of one man operation during field operation, solves the difficult problems such as staff is numerous, inefficiency, the personnel's dispersion that occur in existing buckling secondary nuclear phase process. Can also be connected by special measure traverse line dish and transmit the buckling secondary signal of telecommunication, realize all automatic measurement nuclear phase of the remote buckling secondary of intelligent substation, job site is concentrated, can be operated and data record before the intelligent substation automatic phasing tester of buckling secondary after measurement wiring connects during operation, the buckling terminal box place at two ends need not be dispersed in.
Preferably, operation face being additionally provided with two groups of air switches, two groups of air switches are connected on two groups between patch jack and relay respectively.Air switch can provide protection for relay, reduces the spoilage of relay, reduces and changes number of times.
Preferably, operation face being additionally provided with two groups of display lamps, often group display lamp has three, and three display lamps of described often group are connected between A phase jack with zero line jack, B phase jack and zero line jack and C phase jack and zero line jack respectively. Display lamp is used to refer to work, makes measurement definitely change.
Preferably, also having connecting terminal block in casing, air switch is connected with relay by connecting terminal block. Connecting terminal block can wire in box body, make casing inside conductor ordered arrangement, be unlikely in utter disorder, facilitate later stage maintenance and safeguard.
Accompanying drawing explanation
Fig. 1 is the operation face schematic diagram of this utility model intelligent substation automatic phasing tester of buckling secondary.
Fig. 2 is the wiring diagram of this utility model intelligent substation automatic phasing tester of buckling secondary.
Fig. 3 is the schematic diagram of this utility model intelligent substation automatic phasing tester of buckling secondary.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The automatic phasing tester 100 of intelligent substation buckling secondary, including operation face 10 and casing, operation face 10 is arranged on casing, operation face 10 has two groups of patch jacks 11, air switch 14, display lamp 12, permutator 15 and voltmeter 13, as shown in Figure 1. Patch jack 11 includes A phase jack, B phase jack, C phase jack and zero line (N phase) jack. Air switch 14 has two, and each air switch 14 has three incoming lines and three line outlets. Display lamp 12 has six, is divided into two groups, often group three. Three incoming lines of air switch 14 are connected with A phase jack, B phase jack and C phase jack respectively, three line outlets of air switch 14 are connected with a display lamp 12 respectively, another connection jaws of display lamp 12 is connected with zero line (N phase) jack, and namely display lamp 12 is connected between air switch 14 with zero line (N phase) jack. Having connecting terminal block 22 and relay 21 in casing, three line outlets of air switch 14 are electrically connected with relay 21 by connecting terminal block 22. The end that controls of relay 21 electrically connects with the permutator 15 on operation face 10, permutator 15 is used for controlling relay 21, the outfan of relay 21 electrically connects with the voltmeter 13 on operation face 10, thus test result being exported in the form of a voltage on voltmeter 13, as shown in Figure 2 and Figure 3.
During test, A, B, C three-phase of two groups of voltages and zero line are passed through in the patch jack 11 that measure traverse line dish (i.e. long cable) accesses intelligent substation phasing tester 100, first group of voltage U1A��U1B��U1C��U1N is as benchmark group, second group of voltage U2A��U2B��U2C��U2N is as test group, the input of relay 21 it is respectively connected to by circuit as shown in Figure 2 and Figure 3, then pass through permutator 15 and control relay 21 running voltage, control relay 21 outfan, so as to the voltage extremely corresponding voltmeter 13 that output is required, directly observe measurement result by voltmeter 13.
Analysis about to the automatic phasing tester measurement result of intelligent substation buckling secondary:
For in 110kV and system above, owing to once for being directly grounded, so voltage transformer many employings Y type wiring, secondary voltage is:
UA=57.7V, UB=57.7V, UC=57.7V, UAB=100V, UBC=100V, UCA=100V.
For 10kV distribution system; owing to being once non-effective earthing or earth-free; so voltage transformer many employings V-type wiring; city one-level or two grades of switching stations are carried out being frequently encountered in nuclear phase process this wiring condition by reality; V-type wiring is owing to being secondary side B phase ground connection, so secondary voltage is:
UA=100V��UB=0V��UC=100V��UAB=100V��UBC=100V��UCA=100V��
When same power supply nuclear phase is correct, carry out different power supply nuclear phase, if phase place is incorrect it is possible that situations below:
Using I section positive phase sequence voltage for standard as reference, checking II section voltage, it is assumed that I section voltage link is ABC wiring, II section voltage link is BCA wiring, it is assumed that voltage transformer is Y type wiring, then measurement result is as shown in table 1:
Table 1: voltage transformer is the measurement result of Y type wiring
Assume that voltage transformer is V-type wiring, then measurement result is as shown in table 2:
Table 2: voltage transformer is the measurement result of Y type wiring
Measurement result according to table 1, table 2, it is clear that the measurement result of the Y type wiring shown in table 1 is easier to analyze.
To above-mentioned Y type wiring interpretation of result:
U2A and U1B measurement result is 0V, and with I section voltage for standard, II section first-phase voltage is exactly B phase voltage;
U2B and U1C measurement result is 0V, and with I section voltage for standard, II section second-phase voltage is exactly C phase voltage;
U2C and U1A measurement result is 0V, and with I section voltage for standard, II section third phase voltage is exactly A phase voltage.
Measurement result can be obtained: II section wiring is BCA wiring.
To above-mentioned V-type wiring interpretation of result:
Data from table 2, it is not easy to direct analysis goes out the relation of II section voltage and I section voltage, but due to secondary side B phase ground connection in V-type wiring, therefore UA0=UAB=100V, and two voltage swing phasors are consistent, for same voltage; UC0=UCB=100V, and two voltage swing phasors are consistent, are also same voltage.
Thus the measurement data of table 2 can be rewritten into V-type wiring result as shown in table 3 by us:
Table 3: voltage transformer is V-type wiring result
By table 3 data it can be seen that voltage U2AB and U1The measurement result of CB is 200V, again due to U2AB=100V, U1CB=100V, so U2AB and U1CB is two phasors equal in magnitude, in opposite direction, so U2AB can be write as U1BC and U1CB differs 200V, thus relatively and I section voltage be standard, II section voltage first-phase is B phase, and second-phase is C phase, then third phase is A phase certainly, then may determine that II section wiring is BCA wiring.
Claims (4)
1. the automatic phasing tester of intelligent substation buckling secondary, including operation face and casing, operation face is arranged on casing, operation face there are two groups of patch jacks, a permutator and at least two voltmeter, relay is had in casing, it is characterized in that: two groups of patch jacks all include A phase jack, B phase jack, C phase jack and zero line jack, the outfan of patch jack electrically connects with the input of relay, the outfan of relay electrically connects with the input of voltmeter, and the control end of relay electrically connects with permutator.
2. the intelligent substation automatic phasing tester of buckling secondary as claimed in claim 1, it is characterised in that: being additionally provided with two groups of air switches on operation face, often group air switch is all connected between patch jack and relay.
3. the intelligent substation automatic phasing tester of buckling secondary as claimed in claim 1 or 2, it is characterized in that: operation face is additionally provided with two groups of display lamps, often group display lamp has three, and three display lamps of described often group are connected between A phase jack with zero line jack, B phase jack and zero line jack and C phase jack and zero line jack respectively.
4. the intelligent substation automatic phasing tester of buckling secondary as claimed in claim 2, it is characterised in that: also having connecting terminal block in casing, air switch is connected with relay by connecting terminal block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521066387.7U CN205301429U (en) | 2015-12-18 | 2015-12-18 | Intelligent substation presses and becomes automatic nuclear phase ware of secondary |
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| CN201521066387.7U CN205301429U (en) | 2015-12-18 | 2015-12-18 | Intelligent substation presses and becomes automatic nuclear phase ware of secondary |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510714A (en) * | 2015-12-18 | 2016-04-20 | 国家电网公司 | Intelligent substation pressure transmitter secondary automatic phase tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510714A (en) * | 2015-12-18 | 2016-04-20 | 国家电网公司 | Intelligent substation pressure transmitter secondary automatic phase tester |
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