CN208888292U - The transient test load device of three-phase brushless alternating-current generator - Google Patents
The transient test load device of three-phase brushless alternating-current generator Download PDFInfo
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- CN208888292U CN208888292U CN201821571452.5U CN201821571452U CN208888292U CN 208888292 U CN208888292 U CN 208888292U CN 201821571452 U CN201821571452 U CN 201821571452U CN 208888292 U CN208888292 U CN 208888292U
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Abstract
The utility model discloses a kind of transient test load devices of three-phase brushless alternating-current generator, including low-voltage load and three-phase transformer.Low-voltage load is connect by low-pressure side breaker with low voltage generator；The low-pressure side of three-phase transformer is connect by knife switch with low-voltage load, and the high-pressure side of the three-phase transformer is connect by cutting switch and high-pressure side breaker with mesohigh generator；The high-pressure side input voltage of three-phase transformer is 3.3KV~13.8KV, low-pressure side output voltage 400V；The low pressure winding of three-phase transformer uses star connection, and low pressure winding connector is guided on knife switch；Each phase winding of the high-voltage winding of three-phase transformer is made of two windings, so that high-voltage winding is had 12 winding joints, and 12 winding joints are connected on cutting switch；There are four types of connections for high-voltage winding.The load device of the utility model is able to satisfy the transient test of low voltage generator and all mesohigh generators.
Description
Technical field
The utility model relates to a kind of transient test load devices of three-phase brushless alternating-current generator.
Background technique
The type approval test of generator is to judge an important link of generator quality.Wherein " motor transient test " be also
One key property test of generator.The operating process of " motor transient test ".National Specification, when three-phase synchronous motor and
Its excitation unit is run in rated speed and close under voltage rating state, in the unloaded state the rated current of impact 60% and
Power factor is no more than the three phase symmetry load of 0.4 (lag)；After stabilization, then dashes forward and unload above-mentioned load, when Voltage Drop, wink
State voltage regulation factor should be not less than -15%；When voltage rises, transient voltage regulation factor should be not more than+20%, power generation
Set end voltage be restored to and be maintained at final steady-state value difference be no more than ± 3% in the range of, the required time should be not more than
1.5 the second.
The transient test of domestic existing medium-sized three-phase brushless alternating-current generator is divided into two kinds at present: the first is low pressure power generation
The transient test of machine 10, i.e. low voltage motor band low pressure transient load, are made of, wiring side low tension reactor 11 and low resistance 12
Formula such as Fig. 1；It is for second the transient test (being referred to as mesohigh generator) of medium and high pressure generator 20, i.e. mesohigh generates electricity
Machine band high voltage transient loads, and is made of high voltage reactor 21 and high-tension resistive 22, the mode of connection such as Fig. 2.
Low voltage generator transient test: i.e. the power supply of low voltage generator output removes driving low-voltage load.From low-voltage load
For angle, low-voltage load is very widely used, manufactures and is easier to realize.For from cost, low pressure is negative
It carries cheaper.But in practice, generator not only only has low voltage motor, and demand surges high-voltage generator in recent years, special
It is not as communication equipment service intensively increases, the continuous expansion of electric business platform, data center needs to purchase a large amount of high-voltage electricity
Machine meets the power demand of large capacity.So there is an urgent need to the transient loads for test of dispatching from the factory for high-voltage generator.
The transient test of mesohigh generator: i.e. the power supply of high-voltage generator output goes driving mesohigh load.Mesohigh
Load have following features: first feature is that electric moter voltage nominal rating is more, mainly have 3.3KV, 5.7KV, 6.6KV, 10KV,
10.5KV, 11KV and 13.8KV etc..Second feature is that transient load type is more；Due to electric moter voltage disunity, so causing
The motor of one nominal voltage, as soon as demand corresponds the mesohigh load cabinet of voltage, how many kind voltage needs more
The load cabinet of few kind of specification.Third feature is that the load of mesohigh generator is at high cost；Due to use high pressure pure resistance and
High voltage induction, high voltage connector and vacuum circuit breaker etc. control class electrical equipment, compared with low-voltage load cabinet, with the middle height of power
Pressure load cost significantly improves.4th feature is that the load cabinet volume of high-voltage motor is big, and requirements of installation space is more harsh；By
It is improved in voltage class, so service clearance, safe distance, electric clearance and creepage distance etc. are all greatly improved,
Space increases, and high-tension apparatus just understands operational security, but biggish installation space is one for infrastructure fixed at present
Greatly challenge.
Utility model content
A kind of three-phase brushless alternating-current generator is provided the purpose of the utility model is to overcome the defect of the prior art
Transient test load device, it can not only test low voltage generator, but also be able to satisfy the transient test of all mesohigh generators,
The cost of investment of testing equipment is greatly reduced, and system simplifies, while also improving the reliability of testing equipment system.
Purpose of the utility model is realized as follows: a kind of transient test of three-phase brushless alternating-current generator load dress
It sets, including low voltage generator transient test low-voltage load and three-phase transformer；The low-voltage load is by low tension reactor and low
Piezoresistance constitutes and passes through low-pressure side breaker and connect with low voltage generator；Wherein,
The low-pressure side of the three-phase transformer is connect by a knife switch with the low-voltage load, the height of three-phase transformer
Pressure side is connect by a cutting switch with one end of high-pressure side breaker, and the other end and mesohigh of the high-pressure side breaker generate electricity
Machine connection；
The high-pressure side input voltage of the three-phase transformer is 3.3KV~13.8KV, low-pressure side output voltage 400V；
The low pressure winding of the three-phase transformer uses star connection, and low pressure winding connector is guided to the knife switch
On；
Each phase winding of the high-voltage winding of the three-phase transformer is made of two windings, and high-voltage winding is made to have 12
A winding joint, and 12 winding joints are connected on the cutting switch；
As the 3.96KV of 3.3KV or 60Hz that the voltage class of the mesohigh generator is 50Hz, high-voltage winding is adopted
With delta connection in parallel；When the voltage class of high-voltage generator is the 7.9KV of the 6.6KV or 60Hz of 50Hz in the middle, three phase transformations
The high-voltage winding of depressor uses serial triangle connection；The voltage class of high-voltage generator is the 5.7KV or 60Hz of 50Hz in the middle
6.84KV when, high-voltage winding use parallel in planetary connection；In the middle the voltage class of high-voltage generator be 50Hz 11.4KV or
When the 13.8KV of 60Hz, high-voltage winding is using series connection star connection.
The transient test load device of above-mentioned three-phase brushless alternating-current generator, wherein the three-phase transformer is superfluous
Two capacity of remaining setting equal low capacity three-phase transformer or a high-capacity three-phase transformer, the high-capacity three-phase transformation
The capacity of device is equal to the total capacity of two low capacity three-phase transformers.
The transient test load device of the three-phase brushless alternating-current generator of the utility model, using a set of low-voltage load and
One or two transformers, and the high-voltage winding of transformer is designed to four kinds of changeable connections, the connection of low pressure winding is solid
It is fixed constant, so that the load of more specification high-voltage motors becomes a single low-voltage load, it can not only test low voltage generator, but also energy
Meet the transient test of the mesohigh generator of all voltage class.Thus, the transient test of the generator of all voltage class
Same set of low-voltage load is only used only, not only greatly reduces the cost of investment of testing equipment, and system simplifies, while
Improve the reliability of testing equipment system.It was both economical and reliable when using two transformers,
Detailed description of the invention
Fig. 1 be the low voltage motor of the prior art with low pressure transient load when wiring diagram；
Fig. 2 is the wiring diagram when mesohigh motor of the prior art is loaded with high voltage transient；
Fig. 3 is the structural schematic diagram of the transient test load device of the three-phase brushless alternating-current generator of the utility model；
Fig. 4 a is the structure chart of the low pressure winding of the main transformer in the load device of the utility model；
Fig. 4 b is the structure chart of the high-voltage winding of the main transformer in the load device of the utility model；
Fig. 5 a is that the high-voltage winding corresponding voltage grade of the main transformer in the load device of the utility model is 50Hz
The structure chart of the delta connection in parallel of use when the 3.96KV of 3.3KV or 60Hz；
Fig. 5 b is that the high-voltage winding corresponding voltage grade of the main transformer in the load device of the utility model is 50Hz
The structure chart of the serial triangle connection used when the 7.9KV of 6.6KV or 60Hz；
Fig. 5 c is that the high-voltage winding corresponding voltage grade of the main transformer in the load device of the utility model is 50Hz
The structure chart of the parallel in planetary connection used when the 6.84KV of 5.7KV or 60Hz；
Fig. 5 d is that the high-voltage winding corresponding voltage grade of the main transformer in the load device of the utility model is 50Hz
The structure chart of the series connection star connection used when the 13.8KV of 11.4KV or 60Hz；
Fig. 6 is another embodiment of the transient test load device of the three-phase brushless alternating-current generator of the utility model
Structural schematic diagram.
Specific embodiment
Below in conjunction with attached drawing, the utility model is described in further detail.
Please refer to Fig. 3 to Fig. 6, the transient test load device of the three-phase brushless alternating-current generator of the utility model, packet
Include 10 transient test low-voltage load of low voltage generator and two three-phase transformers 31,32.
Low-voltage load is made of low tension reactor 11 and low resistance 12 and generates electricity by low-pressure side breaker 41 and low pressure
Machine 10 connects；
Two three-phase transformers 31,32 are the equal low capacity three-phase transformer of capacity and are redundancy setting；
The low-pressure side of two three-phase transformers 31,32 is connect each by knife switch 5 with low-voltage load；Two three phase transformations
The high-pressure side of depressor 31,32 is connect each by cutting switch 6 with one end of high-pressure side breaker 42；The high-pressure side breaker 42
The other end connect with mesohigh generator 20；
The high-pressure side input voltage of two three-phase transformers 31,32 is 3.3KV~13.8KV, and low-pressure side output voltage is
400V；
The low pressure winding of two three-phase transformers 31,32 uses star connection (see Fig. 4 a), and by three of low pressure winding
Connector is guided on knife switch 5；
Each phase winding of the high-voltage winding of two three-phase transformers 31,32 is made of two windings (see Fig. 4 b), is made
High-voltage winding has 12 winding joints, and 12 winding joints are connected on cutting switch 6；High-voltage winding has following four to connect
Method:
When the voltage class of high-voltage generator 20 is the 3.96KV of the 3.3KV or 60Hz of 50Hz in the middle, two three phase-change pressures
The high-voltage winding of device 31,32 is all made of delta connection in parallel (see Fig. 5 a)；
When the voltage class of high-voltage generator 20 is the 7.9KV of the 6.6KV or 60Hz of 50Hz in the middle, two three-phase transformers
31,32 high-voltage winding is all made of serial triangle connection (see Fig. 5 b), and lead-out wire is connected on cutting switch 6；
When the voltage class of high-voltage generator 20 is the 6.84KV of the 5.7KV or 60Hz of 50Hz in the middle, two three phase-change pressures
The high-voltage winding of device 31,32 is all made of parallel in planetary connection (see Fig. 5 c)；
When the voltage class of high-voltage generator 20 is the 13.8KV of the 11.4KV or 60Hz of 50Hz in the middle, two three phase-change pressures
The high-voltage winding of device 31,32 is all made of series connection star connection (see Fig. 5 d).
The transient test load device of the three-phase brushless alternating-current generator of the utility model, it is contemplated that three phase-change pressures
When device breaks down, test will be unable to carry out, thus redundancy be provided with the equal and in parallel three-phase transformer 31 of two capacity,
32.When any one in two three-phase transformers 31,32 breaks down, always there is another can run.In addition when smaller
When the mesohigh generator 20 of power needs to test, it is only necessary to put into a three-phase transformer, be not necessarily to two three phase-change pressures
Device 31,32 puts into operation simultaneously, economical apparent；When encountering powerful mesohigh generator 20 and needing to test,
Two three-phase transformers 31,32 are put into simultaneously, are incorporated into the power networks.
When carrying out transient test to low voltage generator 10, as long as disconnecting knife switch 5, make low voltage generator 10 through too low
Pressure side breaker 41 is directly connect with low-voltage load.When needing centering high-voltage generator 20 to carry out transient test, pass through operation
Switch 6 is cut, makes the high-voltage winding of three-phase transformer in delta connection in parallel, serial triangle connection, parallel in planetary connection
Switch in series connection star connection, to adapt to the voltage class of mesohigh generator 20.The connection of four kinds of high-voltage windings makes low pressure
Side output voltage is 400V, to realize reduction and integrate the voltage of all mesohigh generators 20, and finally achieve with it is low
Pressure motor 10 shares the target of a set of low-voltage load.
The transient test load device of the three-phase brushless alternating-current generator of the utility model can also use a great Rong
It measures three-phase transformer 30 (see Fig. 6), the capacity of the high-capacity three-phase transformer 30 is equal to two low capacity three-phase transformers 31,32
Total capacity.
The transient test load device of the three-phase brushless alternating-current generator of the utility model can both test low pressure power generation
Machine, and it is able to satisfy the transient test of all mesohigh generators.Thus, the transient test of the generator of all voltage class is only
Using same set of low-voltage load, the cost of investment of experimental facilities is greatly reduced, and system simplifies, while also improving reality
Test the reliability of device systems.
Above embodiments are only for illustration of the utility model, rather than limitations of the present invention, related technical field
Technical staff can also make various transformation or modification in the case where not departing from the spirit and scope of the utility model, because
This all equivalent technical solution also should belong to the scope of the utility model, should be limited by each claim.
Claims (2)
1. a kind of transient test load device of three-phase brushless alternating-current generator, including low voltage generator transient test low pressure
Load and three-phase transformer；The low-voltage load be made of low tension reactor and low resistance and pass through low-pressure side breaker with it is low
The connection of pressure motor；It is characterized in that,
The low-pressure side of the three-phase transformer is connect by a knife switch with the low-voltage load, the high-pressure side of three-phase transformer
It is connect by a cutting switch with one end of high-pressure side breaker, the other end and mesohigh generator of the high-pressure side breaker connect
It connects；
The high-pressure side input voltage of the three-phase transformer is 3.3KV~13.8KV, low-pressure side output voltage 400V；
The low pressure winding of the three-phase transformer uses star connection, and low pressure winding connector is guided on the knife switch；
Each phase winding of the high-voltage winding of the three-phase transformer is made of two windings, make high-voltage winding have 12 around
Group connector, and 12 winding joints are connected on the cutting switch；
As the 3.96KV of 3.3KV or 60Hz that the voltage class of the mesohigh generator is 50Hz, high-voltage winding is using simultaneously
Join delta connection；When the voltage class of high-voltage generator is the 7.9KV of the 6.6KV or 60Hz of 50Hz in the middle, three-phase transformer
High-voltage winding use serial triangle connection；The voltage class of high-voltage generator is the 5.7KV or 60Hz of 50Hz in the middle
When 6.84KV, high-voltage winding uses parallel in planetary connection；In the middle the voltage class of high-voltage generator be 50Hz 11.4KV or
When the 13.8KV of 60Hz, high-voltage winding is using series connection star connection.
2. the transient test load device of three-phase brushless alternating-current generator according to claim 1, which is characterized in that institute
Three-phase transformer the low capacity three-phase transformer or a high-capacity three-phase transformer equal for two capacity of redundancy setting are stated,
The capacity of the high-capacity three-phase transformer is equal to the total capacity of two low capacity three-phase transformers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821571452.5U CN208888292U (en) | 2018-09-26 | 2018-09-26 | The transient test load device of three-phase brushless alternating-current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821571452.5U CN208888292U (en) | 2018-09-26 | 2018-09-26 | The transient test load device of three-phase brushless alternating-current generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208888292U true CN208888292U (en) | 2019-05-21 |
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ID=66513926
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821571452.5U Active CN208888292U (en) | 2018-09-26 | 2018-09-26 | The transient test load device of three-phase brushless alternating-current generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208888292U (en) |
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2018
- 2018-09-26 CN CN201821571452.5U patent/CN208888292U/en active Active
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