CN106374430A - Electric generator no-load overvoltage protection method and device - Google Patents
Electric generator no-load overvoltage protection method and device Download PDFInfo
- Publication number
- CN106374430A CN106374430A CN201610975453.5A CN201610975453A CN106374430A CN 106374430 A CN106374430 A CN 106374430A CN 201610975453 A CN201610975453 A CN 201610975453A CN 106374430 A CN106374430 A CN 106374430A
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- China
- Prior art keywords
- overvoltage protection
- electromotor
- generator
- signal
- voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to the technical field of electronics, and discloses an electric generator no-load overvoltage protection method and device. The electric generator no-load overvoltage protection method comprises the steps of receiving a voltage signal of an electric generator; receiving a switch signal of an outlet circuit breaker of a transformer bank of the electric generator; and judging whether to perform an overvoltage protection action based on the voltage signal of the electric generator and the switch signal of the outlet circuit breaker of the transformer bank of the electric generator. The electric generator no-load overvoltage protection method and device can effectively protect the electric generator, can reduce burden of a magnetism extinguishing device and avoids safety hazard caused by improper overvoltage protection.
Description
Technical field
The present invention relates to electroporation field, in particular it relates to a kind of electromotor zero load over-voltage protection method and device.
Background technology
Overvoltage protection is used for protecting the stator overvoltage causing under electromotor various running conditions, does not differentiate between electromotor unloaded
And load condition, jump degaussing switch after first off-the-line during action, discharge demagnetization.In prior art, generator super-voltage protection definite value
For 1.3 times of 0.5s (i.e. 1.3 times of rated voltage).But in fact, encourage by force under Light Condition by mistake during, electromotor
Voltage constantly rises rotor current will be promoted constantly to rise, that is, rotor magnetic energy constantly rises.Generator amature voltage is unexpected
Bear more than 2 times of rated excitation voltage, rotor current and stator voltage rapid increase.Saturation due to electromotor no-load characteristic
Factor, when stator voltage rises to 1.3 multiples, rotor current has reached 2 times about rated exciting currents；Due to electromotor mistake
1.3 times of time delays of voltage protection 0.5 second, along with degaussing switch and trip(ping) circuit time delay in 0.1 second, now stator voltage is close to 1.4
Again, rotor current and rotor magnetic energy are close to 3 times.Under the big energy of this high current, jump degaussing switch has demagnetization and fails and burn
Destroy the danger of magnetic switch.
I.e. the above-mentioned over-voltage protection method of prior art exists and encourages by force at the stator overvoltage of generation to from shunt excitation is unloaded by mistake
Put burden that is ineffective, increasing field suppression equipment and there is very big potential safety hazard etc..
Content of the invention
Over-voltage protection method for the electromotor of prior art exists to from the unloaded stator mistake encouraging by force generation of shunt excitation by mistake
Voltage is disposed burden that is ineffective, increasing field suppression equipment and is haveed the shortcomings that very big potential safety hazard etc., the invention provides a kind of
Electromotor zero load over-voltage protection method, the method includes: receives generator voltage signal；Receive the outlet of generator transformer group disconnected
The switching signal of road device；And the switch according to described generator voltage signal and described generator transformer group outlet breaker
Signal, judges whether to execute overvoltage protection action.
Correspondingly, present invention also offers a kind of electromotor zero load over-pressure safety device, this electromotor zero load overvoltage protection
Device includes: first input end, for receiving generator voltage signal；Second input, for receiving generator transformer group
The switching signal of outlet breaker；And overvoltage protection actuating signal output module, with described first input end and described second
Input connects, for the switch letter according to described generator voltage signal and described generator transformer group outlet breaker
Number, output execution overvoltage protection actuating signal is to overvoltage protection movement device.
Using electromotor provided by the present invention zero load over-voltage protection method and device, by receiving generator voltage signal
With the switching signal of generator transformer group outlet breaker, according to described generator voltage signal and described generator transformer
The switching signal of group outlet breaker judges whether to execute overvoltage protection action, is capable of the effective protection to electromotor, subtracts
The burden of few field suppression equipment is, avoid the generation of the potential safety hazard leading to because overvoltage protection is improper.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the electromotor zero load over-pressure safety device according to one embodiment of the present invention；
Fig. 2 is the schematic diagram of the electromotor zero load over-pressure safety device according to another embodiment of the invention；And
Fig. 3 is the schematic flow diagram of the electromotor zero load over-voltage protection method according to one embodiment of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Will be exemplified below the thought of the present invention, it is to be understood that these examples be non-limiting example, the present invention
Protection domain not limited to this:
In order to the thought of the present invention is clearly described, Fig. 1 is the electromotor according to one embodiment of the present invention
The schematic diagram of unloaded over-pressure safety device, as shown in figure 1, this device may include that first input end, for receiving the electromechanics that generates electricity
Pressure signal；Second input, for receiving the switching signal of generator transformer group outlet breaker；And overvoltage protection action
Signal output module, is connected with described first input end and described second input, for according to described generator voltage signal
With the switching signal of described generator transformer group outlet breaker, it is dynamic to overvoltage protection that output executes overvoltage protection actuating signal
(this overvoltage protection movement device is similar to prior art, and in order to not obscure protection scope of the present invention, here is no longer superfluous to make device
State), for example, described overvoltage protection movement device can include degaussing switch.
For example, described overvoltage protection actuating signal output module can include and door and comparator, and described first is defeated
Enter end to be connected with comparator, the outfan a1 of described comparator and being connected with an input of door, described second input a2
And be connected with another input of door.Using such configuration, described can be more than in described generator voltage signal with door
Voltage threshold (i.e. u > u ', described voltage threshold is preferably set to 1.15 times of rated voltage) and described electromotor
In the case that transformator group outlet breaker disconnects (i.e. the normally closed auxiliary contact of generator transformer group outlet breaker disconnects),
Output execution overvoltage protection actuating signal y1 is to overvoltage protection movement device.
Using this embodiment, by set up electromotor zero load overvoltage protection and suitably adjust voltage threshold can be square
Just, effectively electromotor is protected, reduce the burden of field suppression equipment, it is to avoid the peace leading to because overvoltage protection is improper
The generation of full hidden danger.
In order to improve reliability, Fig. 2 is the electromotor zero load overvoltage protection dress according to another embodiment of the invention
The schematic diagram put, as shown in Fig. 2 this device is in addition to including the assembly in Fig. 1, Postponement module t, it is used for so that described overvoltage is protected
It is performed after shield action delay scheduled time, the preferably described scheduled time is 0.1 second, execution overvoltage protection action will be exported
Signal y1 exports y2 to overvoltage protection movement device after postponing 0.1 second.
It should be appreciated that those skilled in the art can configure electromotor zero load overvoltage protection dress according to practical situation
Put, for example, those skilled in the art can increase same OR gate, XOR gate and door, Yi Jihuo on the basis of above-mentioned embodiment
The quantity of the logic elements such as door, and it is appropriately modified logic circuit, that is, other embodiments of replacing of the present invention also fall into this
The protection domain of invention.
Fig. 2 is the schematic flow diagram of the electromotor zero load over-voltage protection method according to one embodiment of the present invention, such as
Shown in Fig. 2, the method may comprise steps of:
Step 1001, receives generator voltage signal；Receive the switching signal of generator transformer group outlet breaker；With
And
Step 1002, according to the switch letter of described generator voltage signal and described generator transformer group outlet breaker
Number, judge whether to execute overvoltage protection action.
Preferably, the method can also include: is more than voltage threshold and described generating in described generator voltage signal
In the case that machine transformator group outlet breaker disconnects, judge execution overvoltage protection action.
Preferably, it is performed after described overvoltage protection action delay scheduled time.
Preferably, described voltage threshold is 1.15 times of rated voltage.
Preferably, the described scheduled time is 0.1 second.
It should be appreciated that each specific embodiment of above-mentioned electromotor zero load over-voltage protection method, all generating electricity
Do in the embodiment of machine zero load over-pressure safety device and explained (as described above), will not be described here.And, ability
Field technique personnel can select any one of above-mentioned various embodiments according to disclosure of the invention, or selects above-mentioned various
The combination of embodiment is configuring electromotor zero load over-pressure safety device, and other embodiment of replacing also falls into the present invention
Protection domain.
Using electromotor provided by the present invention zero load over-voltage protection method and device, it is capable of effective to electromotor
Protect, reduce the burden of field suppression equipment, avoid the generation of the potential safety hazard leading to because overvoltage protection is improper.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention is not limited to above-mentioned reality
Apply the detail in mode, in the range of the technology design of the present invention, multiple letters can be carried out to technical scheme
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy no longer separately illustrates.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it equally should be considered as content disclosed in this invention.
Claims (10)
1. a kind of electromotor zero load over-voltage protection method is it is characterised in that the method includes:
Receive generator voltage signal；
Receive the switching signal of generator transformer group outlet breaker；And
According to the switching signal of described generator voltage signal and described generator transformer group outlet breaker, judge whether to hold
Row overvoltage protection action.
2. method according to claim 1 is it is characterised in that the method includes:
It is more than the feelings that voltage threshold and described generator transformer group outlet breaker disconnect in described generator voltage signal
Under condition, judge execution overvoltage protection action.
3. method according to claim 2 is it is characterised in that held after described overvoltage protection action delay scheduled time
OK.
4. method according to claim 3 is it is characterised in that described voltage threshold is the 1.15 of rated voltage
Times.
5. method according to claim 4 is it is characterised in that the described scheduled time is 0.1 second.
6. a kind of electromotor zero load over-pressure safety device is it is characterised in that this electromotor zero load over-pressure safety device includes:
First input end, for receiving generator voltage signal；
Second input, for receiving the switching signal of generator transformer group outlet breaker；And
Overvoltage protection actuating signal output module, is connected with described first input end and described second input, for according to institute
State generator voltage signal and the switching signal of described generator transformer group outlet breaker, output execution overvoltage protection action
Signal is to overvoltage protection movement device.
7. electromotor zero load over-pressure safety device according to claim 6 is it is characterised in that described overvoltage protection action is believed
Number output module includes and door and comparator, and described first input end is connected with comparator, the outfan of described comparator and with
One input of door connects, described second input and being connected with another input of door；Wherein
Described and door is more than voltage threshold and described generator transformer group outlet breaker in described generator voltage signal
In the case of disconnection, output execution overvoltage protection actuating signal is to overvoltage protection movement device.
8. electromotor zero load over-pressure safety device according to claim 7 is it is characterised in that the unloaded overvoltage of this electromotor is protected
Protection unit includes Postponement module, is performed after being used for making described overvoltage protection action delay scheduled time.
9. electromotor zero load over-pressure safety device according to claim 8 is it is characterised in that described voltage threshold is to generate electricity
1.15 times of machine rated voltage, the described scheduled time is 0.1 second.
10. electromotor according to claim 9 zero load over-pressure safety device is it is characterised in that described overvoltage protection action
Device includes degaussing switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610975453.5A CN106374430A (en) | 2016-11-07 | 2016-11-07 | Electric generator no-load overvoltage protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610975453.5A CN106374430A (en) | 2016-11-07 | 2016-11-07 | Electric generator no-load overvoltage protection method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106374430A true CN106374430A (en) | 2017-02-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610975453.5A Pending CN106374430A (en) | 2016-11-07 | 2016-11-07 | Electric generator no-load overvoltage protection method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106374430A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006174531A (en) * | 2004-12-13 | 2006-06-29 | Toyo Electric Mfg Co Ltd | Motor controller |
| CN104242761A (en) * | 2014-07-31 | 2014-12-24 | 阳江核电有限公司 | Excitation adjustment system and method for nuclear power station generator |
| CN206237119U (en) * | 2016-11-07 | 2017-06-09 | 中国神华能源股份有限公司 | Generator zero load over-pressure safety device |
-
2016
- 2016-11-07 CN CN201610975453.5A patent/CN106374430A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006174531A (en) * | 2004-12-13 | 2006-06-29 | Toyo Electric Mfg Co Ltd | Motor controller |
| CN104242761A (en) * | 2014-07-31 | 2014-12-24 | 阳江核电有限公司 | Excitation adjustment system and method for nuclear power station generator |
| CN206237119U (en) * | 2016-11-07 | 2017-06-09 | 中国神华能源股份有限公司 | Generator zero load over-pressure safety device |
Non-Patent Citations (1)
| Title |
|---|
| 向秋芳等: "自并励励磁空载过电压保护研究", 《水电站机电技术》 * |
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Application publication date: 20170201 |
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