CN109856536A - Load cabinet is pressed in one kind - Google Patents
Load cabinet is pressed in one kind Download PDFInfo
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- CN109856536A CN109856536A CN201811603190.0A CN201811603190A CN109856536A CN 109856536 A CN109856536 A CN 109856536A CN 201811603190 A CN201811603190 A CN 201811603190A CN 109856536 A CN109856536 A CN 109856536A
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- 239000003990 capacitor Substances 0.000 claims description 24
- 230000006698 induction Effects 0.000 claims description 16
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 claims description 10
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 claims description 10
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 claims description 10
- 101150105073 SCR1 gene Proteins 0.000 claims description 10
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 claims description 10
- 101000668170 Homo sapiens RNA-binding motif, single-stranded-interacting protein 2 Proteins 0.000 claims description 9
- 102100039690 RNA-binding motif, single-stranded-interacting protein 2 Human genes 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 abstract description 9
- 230000009466 transformation Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 101150097393 SCR gene Proteins 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- -1 indicator light LED1 Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The invention is related to pressing load cabinet in one kind, the input terminal of load cabinet, three-phase bus, transformer and load box are sequentially connected, after the electric energy of power station or generator flow to three-phase bus by input terminal, load testing is carried out to load box by transformer transformation, ground wire is set in load cabinet, selection switch and multiple over-voltage protection elements, different over-voltage protection elements correspond to different voltages grade, one end of each over-voltage protection element is commonly connected to ground wire, the other end of each over-voltage protection element is connected to three-phase bus through selection switch respectively, selection switch then will wherein over-voltage protection element connects with three-phase bus all the way by triggering, three-phase bus is set to obtain corresponding overvoltage protection, realize that load cabinet has the overvoltage protection of multiple voltage grade.
Description
Technical field
The invention is related to the testing field that generates electricity, in particular to presses load cabinet in one kind.
Background technique
The middle pressure of power station or generator output test in, need with load cabinet carry out in press load testing, due to each
State/area power station or generator size are different, and the voltage class of the middle pressure output test in different state/areas is different, such as electricity
Pressure grade has exchange 3KV, 4KV, 6KV and 10KV etc..But in traditional load cabinet, due to being limited by overvoltage restriction element thereon
(on preventing overvoltage protection, the overvoltage restriction element that different voltages grade needs is different, 3KV, 4KV, 6KV and 10KV's for system
Over-voltage protection element between each other can not be general), a load cabinet can only be adapted to a kind of voltage class, if desired test a variety of electricity
Grade is pressed, more corresponding load cabinets is just configured, testing cost is significantly greatly increased.
Summary of the invention
The purpose of the invention is aiming at the shortcomings in the prior art, and provides and press load cabinet in one kind, the load
Cabinet has the overvoltage protection of multiple voltage grade.
The purpose of the invention is achieved through the following technical solutions: press load cabinet in one kind, including it is sequentially connected into
Line terminals, three-phase bus, transformer and load box further include the over-voltage guarantor of ground wire, selection switch and multiple and different voltage class
Protection element, one end of each over-voltage protection element are commonly connected to ground wire, and the other end of each over-voltage protection element is respectively through institute
It states selection switch and is connected to three-phase bus, the selection switch is by trigger then will wherein over-voltage protection element and three-phase bus all the way
Connect.
Wherein, selection switch be electric-controlled switch, further include the controller to connect with the electric-controlled switch, the touching
Hair is realized by controller.
Wherein, the three-phase bus is connected with voltage check device, and the voltage of voltage check device detection three-phase bus is given
The controller, so that controller executes the triggering.
Wherein, the three-phase bus is connected with induction reactance compensation device to compensate induction reactance for three-phase bus, the induction reactance compensation
Device connects with controller.
Wherein, the induction reactance compensation device include three inductance L1, L2, L3 and three bidirectional thyristor SCR1, SCR2,
SCR3, three inductance L1, L2, L3 are connected by star connection with the three-phase bus, three bidirectional thyristor SCR1,
SCR2, SCR3 are serially connected in respectively on the line between three inductance L1, L2, L3 and three-phase bus, the induction reactance compensation device with
The mode that controller connects is specifically the controlled end that controller is separately connected three bidirectional thyristors SCR1, SCR2, SCR3.
Wherein, capacitor C4 is serially connected on every line between three inductance L1, L2, L3 and three-phase bus.
It wherein, further include capacitive reactance compensation device, capacitive reactance compensation device connects with the three-phase bus.
Wherein, the capacitive reactance compensation device includes three capacitors C1, C2, C3, and three capacitors C1, C2, C3 pass through connection delta
Method connects with the three-phase bus.
Wherein, it is serially connected with switch KM3 on every line between three capacitors C1, C2, C3 and three-phase bus, switched
KM3 and the contact where it on line between capacitor are connected with switch KM4 and discharge resistance R1 in turn, discharge resistance R1 with it is described
Ground wire connects, and switch KM3 and switch KM4 are interlocked.
Wherein, the switch KM3 and switch KM4 be electric-controlled switch, the switch motion of switch KM3 and switch KM4 are by institute
State controller control.
The utility model has the advantages that
The input terminal, three-phase bus, transformer and load box of the invention are sequentially connected, power station or generator
After electric energy flow to three-phase bus by input terminal, load testing is carried out to load box by transformer transformation, is configured in load cabinet
Line, selection switch and multiple over-voltage protection elements, different over-voltage protection elements correspond to different voltages grade, each overvoltage protection member
One end of part is commonly connected to ground wire, and the other end of each over-voltage protection element is connected to three-phase mother through selection switch respectively
Line, selection switch by triggering then will wherein over-voltage protection element connects with three-phase bus all the way, obtain three-phase bus accordingly
Overvoltage protection realizes that load cabinet has the overvoltage protection of multiple voltage grade.
Detailed description of the invention
The invention is described further using attached drawing, but the embodiment in attached drawing is not constituted to the invention
Any restrictions for those of ordinary skill in the art without creative efforts, can also be according to following attached
Figure obtains other attached drawings.
Fig. 1 is the circuit diagram that load cabinet is pressed in one kind of the invention.
Fig. 2 is the circuit diagram of the induction reactance compensation device of the invention.
Specific embodiment
The invention is further described with the following Examples.
See Fig. 1, on middle pressure load cabinet tool there are three input terminal, three input terminals respectively with three-phase bus in cabinet three
Root phase electric wire TAa, TAb, TAc connect, and the electronic device in cabinet body is connected on three phase electric wires TAa, TAb, TAc.Due to removing
Outside electronic device in box, the electronic device and its connection structure on three phase electric wires TAa, TAb, TAc are all the same, and Fig. 1 is
It is convenient to simplify, and only illustrates the electronic device on phase electric wire Tab, the electronic device on remaining two phase electric wires TAa, Tac is not made
It repeats and illustrates, and the electronic device in box carries out three with three-phase bus and is connected, specific connection is as detailed below.
There are three-phase bus, transformer T1 and load box FZ in middle pressure load cabinet, the electric energy of power station or generator is by inlet wire
After terminal flow to three-phase bus, load testing is carried out to load box FZ by transformer T1 transformation, wherein the specific knot of load box FZ
Structure can refer to patent document CN205786738U, not repeat herein.
Further include over-voltage protection element SA1~4 of four different voltages grades in middle pressure load cabinet, respectively correspond 10KV,
The overvoltage protection of 6KV, 4KV and 3KV, one end of four over-voltage protection element SA1~4 are commonly connected to ground wire, and four over-voltages are protected
The other end of protection element SA1~4 is connected to phase electric wire Tab after four relays respectively.Wherein four relay composition selections
Switch, the controlled end of this four relays are connected with controller；Phase electric wire Tab is also connected with voltage check device PT, voltage inspection
The voltage of device PT detection phase electric wire Tab is surveyed to controller, controller learns the electricity that input terminal is connected according to the voltage
Grade is pressed, and triggers one of relay conducting, so that corresponding over-voltage protection element is connected with phase electric wire Tab, is phase electric wire
Tab provides corresponding overvoltage protection.
Since load cabinet can input multiple voltage grade, the different induction reactance under the different voltages grade to provide load cabinet are mended
Repay, be connected with induction reactance compensation device LX in three-phase bus, see Fig. 2, wherein induction reactance compensation device LX include three inductance L1, L2,
L3 and three bidirectional thyristor SCR1, SCR2, SCR, three inductance L1, L2, L3 are connected by star connection with three-phase bus,
Three bidirectional thyristors SCR1, SCR2, SCR3 are serially connected in respectively on the line between three inductance L1, L2, L3 and three-phase bus,
The controlled end of three bidirectional thyristors SCR1, SCR2, SCR3 are separately connected controller, and controller passes through control three in use process
The conducting duration of a bidirectional thyristor SCR1, SCR2, SCR3 control the compensation of different induction reactance, to be adapted to different voltages grade.
Further, it is serially connected with capacitor C4 on every line between three inductance L1, L2, L3 and three-phase bus, passes through capacitor
The effect of releasing of C4 carrys out smooth waveform curve.
Be equipped in middle pressure load cabinet capacitive reactance the compensation device CX, three capacitor C1, C2 being made of three capacitors C1, C2, C3,
C3 is connected by delta-connection with three-phase bus, is carried out capacitive reactance compensation to three-phase bus, is reduced the reactive power of three-phase bus.
Since there are many voltage class for load cabinet operation, lower three capacitors C1, C2, C3 institute energy storage of different voltages grade is different, to avoid
When voltage class switches because capacitor C1, C2, C3 stored energy is different generate can not estimate interference, before the handover first by capacitor
C1, C2, C3 electric discharge zero, therefore switch is serially connected on every line between three capacitors C1, C2, C3 and three-phase bus
KM3, wherein switch KM3 and the contact where it on line between capacitor are successively connected to the ground after switch KM4, discharge resistance R1
Line, switch KM3 and switch KM4 are relay, and the controlled end of the two connects with controller, and both director demon control is mutually
Lock.Before executing voltage class switching, controller is connected switch KM4, disconnects switch KM3, and capacitor C1, C2, C3 are discharged and are zeroed；It holds
After the switching of row voltage class, controller disconnects switch KM4, conducting switch KM3, provides capacitor C1, C2, C3 access three-phase bus
Reactive compensation.Further, Current Transmit, current transformer are additionally provided on the line of phase electric wire Tab and three-legged structure
Electric current on CT real-time monitoring line finds conducting switch KM4 when current anomaly for controller, disconnects switch KM3 to controller,
Capacitor C1, C2, C3 are discharged.
It is additionally provided with fuse QF1, QF2, QF3 in middle pressure load cabinet, wherein fuse QF1 is connected on phase electric wire Tab and electricity
On the line for pressing detection device PT, fuse QF2 is connected on the line of phase electric wire Tab and three-legged structure, fuse QF3 phase electricity
On the line of line Tab and induction reactance compensation device LX, protected for respective lines.
Phase electric wire Tab is successively connected to ground wire after capacitor, indicator light LED1, and phase electric wire Tab obtains electric then indicator light LED1
Starting shines.Indicator light LED2 is parallel on one of capacitor in three-legged structure, three-legged structure refers to when accessing three-phase bus
Show that lamp LED2 shines.
It is in series with switch KM1 on input terminal to the phase electric wire Tab in this section of line of three-phase bus, the phase in three-phase bus
Electric wire Tab is connected to ground wire through switch KM2, and switch KM1 and switch KM2 are relay, the controlled end and controller phase of the two
It connects, both director demon control interlocking.Controller control switch KM1 conducting, switch KM2 are disconnected when load cabinet works, inlet wire
The electric energy of terminal flow to three-phase bus；Controller control switch KM1 is disconnected when load cabinet is idle, switch KM2 is connected, three-phase bus
Ground protection.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the invention, rather than to this hair
It is bright create protection scope limitation, although being explained in detail referring to preferred embodiment to the invention, this field it is general
Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the invention, without departing from this
The spirit and scope of innovation and creation technical solution.
Claims (10)
1. load cabinet is pressed in one kind, it is characterized in that:
Including sequentially connected input terminal, three-phase bus, transformer and load box,
Further include ground wire, selection switch and multiple and different voltage class over-voltage protection element, the one of each over-voltage protection element
End is commonly connected to ground wire, and the other end of each over-voltage protection element is connected to three-phase bus through selection switch respectively, institute
Stating selection switch then will wherein over-voltage protection element be connected to three-phase bus all the way by triggering.
2. load cabinet is pressed in one kind according to claim 1, it is characterized in that: it is electric-controlled switch that selection switch, which is, also
Including the controller to connect with the electric-controlled switch, the triggering is realized by controller.
3. load cabinet is pressed in one kind according to claim 2, it is characterized in that: the three-phase bus is connected with voltage detecting dress
It sets, voltage check device detects the voltage of three-phase bus to the controller, so that controller executes the triggering.
4. load cabinet is pressed in one kind according to claim 2, it is characterized in that: the three-phase bus is connected with induction reactance compensation dress
It sets and compensates induction reactance for three-phase bus, the induction reactance compensation device connects with controller.
5. load cabinet is pressed in one kind according to claim 4, it is characterized in that: the induction reactance compensation device includes three inductance
L1, L2, L3 and three bidirectional thyristor SCR1, SCR2, SCR3, three inductance L1, L2, L3 are by star connection come with described three
Phase bus connects, three bidirectional thyristors SCR1, SCR2, SCR3 be serially connected in respectively three inductance L1, L2, L3 and three-phase bus it
Between line on, the mode that the induction reactance compensation device connects with controller is specifically that controller is separately connected three two-way brilliant locks
The controlled end of pipe SCR1, SCR2, SCR3.
6. press load cabinet in one kind according to claim 5, it is characterized in that: three inductance L1, L2, L3 and three-phase bus it
Between every line on be serially connected with capacitor C4.
7. load cabinet is pressed according in one kind described in claim 4,5 or 6, it is characterized in that: further including capacitive reactance compensation device, capacitive reactance
Compensation device connects with the three-phase bus.
8. load cabinet is pressed in one kind according to claim 7, it is characterized in that: the capacitive reactance compensation device includes three capacitors
C1, C2, C3, three capacitors C1, C2, C3 are connected by delta-connection with the three-phase bus.
9. press load cabinet in one kind according to claim 8, it is characterized in that: three capacitors C1, C2, C3 and three-phase bus it
Between every line on be serially connected with switch KM3, switch KM3 and the contact where it on line between capacitor are connected in turn open
KM4 and discharge resistance R1 is closed, discharge resistance R1 connects with the ground wire, and switch KM3 and switch KM4 are interlocked.
10. load cabinet is pressed in one kind according to claim 9, it is characterized in that: it is electricity that the switch KM3 and switch KM4, which are,
Control switch, the switch motion of switch KM3 and switch KM4 are controlled by the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811603190.0A CN109856536A (en) | 2018-12-26 | 2018-12-26 | Load cabinet is pressed in one kind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811603190.0A CN109856536A (en) | 2018-12-26 | 2018-12-26 | Load cabinet is pressed in one kind |
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| Publication Number | Publication Date |
|---|---|
| CN109856536A true CN109856536A (en) | 2019-06-07 |
Family
ID=66892555
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811603190.0A Pending CN109856536A (en) | 2018-12-26 | 2018-12-26 | Load cabinet is pressed in one kind |
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|---|---|
| CN (1) | CN109856536A (en) |
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|---|---|---|---|---|
| CN2159030Y (en) * | 1993-04-14 | 1994-03-16 | 冀东石油勘探开发公司基建工程部通信站 | Multifunctional electronic load box |
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| CN203522204U (en) * | 2013-10-21 | 2014-04-02 | 安徽天沃电气技术有限公司 | Continuous switching TSC module for unbalanced load compensation between phases |
| KR20170022231A (en) * | 2015-08-19 | 2017-03-02 | 엘에스산전 주식회사 | Static var compensator apparatus and operating method thereof |
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