CN206541730U - Unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer - Google Patents
Unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer Download PDFInfo
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- CN206541730U CN206541730U CN201720148663.7U CN201720148663U CN206541730U CN 206541730 U CN206541730 U CN 206541730U CN 201720148663 U CN201720148663 U CN 201720148663U CN 206541730 U CN206541730 U CN 206541730U
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Abstract
The utility model discloses a kind of unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer, for measuring U simultaneouslyA、UB、UC、ULFour magnitudes of voltage, the problem of solving Large Copacity, including control cabinet and the unbalanced type three-phase coenosarc that is arranged in control cabinet once through-flow pressure build-up test transformer body, the low-pressure side of the power supply side joint transformer station of transformer body, the load side of transformer body exports three groups of different three-phase voltages, and warning device is connected between any two-phase of mains side.
Description
Technical field
The utility model is related to intelligent substation verifying voltage, electric current, secondary circuit design, wiring technique field, specifically
It is a kind of unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer that ground, which is said,.
Background technology
Whether existing verifying voltage, electric current, secondary circuit design, wiring are correct, are typically once led to using split type
Stream once leads to pressure scheme, but split type transformer capacity is small, leads to and presses confined condition many, can only detect UA、UB、UC, it is impossible to simultaneously
Measure UA、UB、UC、UL, cause big CT no-load voltage ratio equipment debugging means inadequate.
Utility model content
The purpose of this utility model is to provide a kind of unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer, used
In solving, Split type transformer capacity is small, leads to pressure and is limited, the problem of detection means is inadequate.
The technical scheme in the invention for solving the technical problem is：Unbalanced type three-phase coenosarc once through-flow liter
Testing transformer is pressed, for measuring U simultaneouslyA、UB、UC、ULFour magnitudes of voltage, the problem of solving Large Copacity, it is characterized in that, including
Control cabinet and the unbalanced type three-phase coenosarc that is arranged in control cabinet once through-flow pressure build-up test transformer body, transformer body
Power supply side joint transformer station low-pressure side, the load side of transformer body exports three groups of different three-phase voltages, appoints in mains side
Warning device is connected between meaning two-phase.
Further, the circle of mains side three-phase windings A phases 48, the circle of B phases 47, the circle of C phases 46 are set；Load side include load side 1,
Load side 2, load side 3, the circle of three-phase windings A phases 16 of load side 1, the circle of B phases 16, the circle of C phases 15, the three-phase windings A phases of load side 2
104 circles, the circle of B phases 117, the circle of C phases 99, the circle of three-phase windings A phases 1080 of load side 3, the circle of B phases 1053, the circle of C phases 1026；So that negative
Lotus side A phase voltages deviation 100%, B phase voltages deviation 95%, C phase voltages deviation 90% differs 5% successively per phase voltage.
Further, load side 1 and the through-flow use of load side 2, the logical pressure of load side 3 are used.
Further, the control cabinet casing top is provided with conservator, conservator is connected with control cabinet；At the rear portion of casing
Fin and mains side binding post are provided with, load side binding post is provided with front of casing.
Further, described warning device includes audible-visual annunciator.
The beneficial effects of the utility model are：
1st, equipment rated capacity 300kVA, it is adaptable to the through-flow logical pressure debugging of current each voltage class transformer station is completely full
The three-phase once through-flow once logical pressure experiment of 6000/1 current mutual inductor with high transforming ratio of foot, 1000kV large velocity ratio voltage transformers.It is logical
Conjunction switch-dividing and disconnecting link are crossed, electric current, the voltage at multiple intervals can be measured simultaneously, the overlength that can be provided more than 168 hours is steady
Determine test current, voltage；By designing no-load voltage ratio, current maxima is more than 800A, and voltage max is more than 15kV；Meet extra-high voltage
The routine of 1000kV AC Substations and following voltage class, the various demands of intelligent substation.
2nd, unbalanced type three-phase coenosarc once leads to pressure a flow-through test new technology, passes through ABC three-phase output ends amplitude point
Do not differ 5%, in that context it may be convenient to detect UA、UB、UC, the secondary numerical value of voltage has significant difference, and actually produces UL, it is ensured that institute
There is secondary voltage circuit powered.
The 3rd, audible-visual annunciator is installed, while testing transformer is powered, warning device is just devoted oneself to work, and warns other people
Member improves overall security not close to pilot region.
Brief description of the drawings
Fig. 1 is the utility model load side winding connection diagram；
Fig. 2 is front view of the present utility model；
Fig. 3 is left view of the present utility model；
Fig. 4 is top view of the present utility model.
Embodiment
Flow technology of three-phase is by the earth, and multiple equipment interval constitutes closed-loop path, simulation system operation, Ke Yiquan
Face checks whether all electric current secondary loop wiring, no-load voltage ratio, phase, phase sequence meet design requirement, can once be set along band checking
The correctness that standby phase phase sequence is installed.The 35kV once led in the low-pressure side that crimping access point is transformer station, such as 220kV transformer stations
Side, metering, the whole wiring of protection group voltage circuit are finished, and are once passed through three-phase test voltage (10kV), simulation system operation can
Problem, including short circuit, mistake phase-sequence phase etc. whether there is with end-to-end voltage transformer secondary line.
Three-phase equilibrium should be exported in theory, and the neutral conductor does not have voltage, and the utility model specially sets three-phase imbalance, defeated
Go out three-phase per phase voltage poor 5% so that the neutral conductor is also with pressure, and U can be thus measured simultaneouslyA、UB、UC、UL, and easily determine
Whether wiring is correct.
Unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer, for measuring U simultaneouslyA、UB、UC、ULFour voltages
Value, the problem of solving Large Copacity, including control cabinet and the unbalanced type three-phase coenosarc once through-flow boosting being arranged in control cabinet
Testing transformer body, the low-pressure side of the power supply side joint transformer station of transformer body, the load side of transformer body exports three groups
Different three-phase voltages, warning device is connected between any two-phase of mains side.
The circle of mains side three-phase windings A phases 48, the circle of B phases 47, the circle of C phases 46 are set.
As shown in figure 1, load side include load side 1, load side 2, load side 3, the circle of three-phase windings A phases 16 of load side 1,
The circle of B phases 16, the circle of C phases 15, the circle of three-phase windings A phases 104 of load side 2, the circle of B phases 117, the circle of C phases 99, the three-phase windings A of load side 3
The circle of phase 1080, the circle of B phases 1053, the circle of C phases 1026, the A phases of load side 1 export 0.2KV, and B phases export 0.19KV, and C phases are exported
0.18KV, the A phases of load side 2 export 1KV, and B phases export 0.95KV, and C phases export 0.9KV, and the A phases of load side 3 export 15KV, B
14.25KV is mutually exported, C phases export 13.5KV.So that load side A phase voltages deviation 100%, B phase voltages deviation 95%, C phases electricity
Deviation 90% is pressed, 5% is differed successively per phase voltage, three-phase imbalance, then the neutral conductor is also with pressure, in that context it may be convenient to detect UA、UB、
UC, the secondary numerical value of voltage has significant difference, and actually produces UL, it is ensured that all secondary voltage circuits are powered.
Load side 1 and the through-flow use of load side 2, the logical pressure of load side 3 are used.
Experiment selection place capacity reaches more than 300kVA, it becomes possible to complete that high pressure-medium voltage side is through-flow, middle pressure-low pressure
Side is through-flow.In high pressure-medium voltage side through-flow test, selection is powered up in high pressure pressure side, and medium voltage side three-phase short circuit is constituted back
Road, by short circuit current flow come checking main transformer high-pressure side cannula C T, neutral point CT, medium voltage side independence CT, cannula C T no-load voltage ratios and secondary
Winding polarity.In middle pressure-low-pressure side through-flow test, low-pressure side three-phase shortcircuit is constituted loop by selection in medium voltage side power supply,
By short circuit current flow come checking main transformer low-pressure side short circuit CT.The short circuit current flow that low-pressure side cannula C T flows through is phase current.
As in Figure 2-4, the control cabinet casing top is provided with conservator, conservator is connected with control cabinet；In casing
Rear portion is provided with fin and mains side binding post, and load side binding post is provided with front of casing.
Warning device uses audible-visual annunciator, while testing transformer is powered, and warning device is just devoted oneself to work, and warns it
His personnel improve overall security not close to pilot region.
It is not new to this practicality although above-mentioned embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, on the basis of the technical solution of the utility model, those skilled in the art need not pay creation
Property the various modifications that can make of work or deform still within protection domain of the present utility model.
Claims (4)
1. unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer, for measuring U simultaneouslyA、UB、UC、ULFour magnitudes of voltage,
The problem of solving Large Copacity, it is characterized in that, including control cabinet and the unbalanced type three-phase coenosarc that is arranged in control cabinet once lead to
Pressure build-up test transformer body is flowed, the low-pressure side of the power supply side joint transformer station of transformer body, the load side of transformer body is defeated
Go out three groups of different three-phase voltages, warning device is connected between any two-phase of mains side；Mains side three-phase windings A phases are set
48 circles, the circle of B phases 47, the circle of C phases 46；Load side includes load side 1, load side 2, load side 3, the three-phase windings A phases 16 of load side 1
Circle, the circle of B phases 16, the circle of C phases 15, the circle of three-phase windings A phases 104 of load side 2, the circle of B phases 117, the circle of C phases 99, the three-phase of load side 3 around
The circle of group A phases 1080, the circle of B phases 1053, the circle of C phases 1026；So that load side A phase voltages deviation 100%, B phase voltages deviation 95%, C
Phase voltage deviation 90%, 5% is differed per phase voltage successively.
2. unbalanced type three-phase coenosarc according to claim 1 once through-flow pressure build-up test transformer, it is characterized in that, load
Side 1 and the through-flow use of load side 2, the logical pressure of load side 3 are used.
3. unbalanced type three-phase coenosarc according to claim 1 once through-flow pressure build-up test transformer, it is characterized in that, in institute
State control cabinet casing top and be provided with conservator, conservator is connected with control cabinet；The rear portion of casing is provided with fin and mains side
Binding post, is provided with load side binding post in front of casing.
4. unbalanced type three-phase coenosarc according to claim 1 once through-flow pressure build-up test transformer, it is characterized in that, it is described
Warning device include audible-visual annunciator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720148663.7U CN206541730U (en) | 2017-02-20 | 2017-02-20 | Unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720148663.7U CN206541730U (en) | 2017-02-20 | 2017-02-20 | Unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer |
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| Publication Number | Publication Date |
|---|---|
| CN206541730U true CN206541730U (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720148663.7U Active CN206541730U (en) | 2017-02-20 | 2017-02-20 | Unbalanced type three-phase coenosarc once through-flow pressure build-up test transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861012A (en) * | 2017-10-17 | 2018-03-30 | 山东送变电工程公司 | A kind of through-flow device of high-power transformer |
| CN114114127A (en) * | 2021-12-02 | 2022-03-01 | 广西电网有限责任公司梧州供电局 | Main transformer bushing CT and main transformer interval zero sequence and gap CT upflow test method |
-
2017
- 2017-02-20 CN CN201720148663.7U patent/CN206541730U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861012A (en) * | 2017-10-17 | 2018-03-30 | 山东送变电工程公司 | A kind of through-flow device of high-power transformer |
| CN114114127A (en) * | 2021-12-02 | 2022-03-01 | 广西电网有限责任公司梧州供电局 | Main transformer bushing CT and main transformer interval zero sequence and gap CT upflow test method |
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