CN109378809A - Generator excitation protects circuit and generator excitation to protect system - Google Patents
Generator excitation protects circuit and generator excitation to protect system Download PDFInfo
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- CN109378809A CN109378809A CN201811336940.2A CN201811336940A CN109378809A CN 109378809 A CN109378809 A CN 109378809A CN 201811336940 A CN201811336940 A CN 201811336940A CN 109378809 A CN109378809 A CN 109378809A
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- excitation
- generator
- resistance
- exciting current
- circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of generator excitations to protect circuit, which includes: for measuring more kinetic energy electric instruments of the exciting current of generator excitation circuit, the inhibition unit for inhibiting exciting current, and the electric-controlled switch unit in parallel with the inhibition unit.When exciting current is more than rated exciting current, will inhibit in unit investment generator excitation circuit to inhibit exciting current.Engine excitation protecting circuit of the invention is that the protection for inhibiting surge is provided directly on excitation main circuit; inhibit unit that exciting current is inhibited acutely to become larger by investment in exciter current of generator exception; when avoiding the silicon-controlled breakdown due to excitation unit; it's the problem of large impact power grid pasts generator immediate current, improves the stability and reliability of excitation unit.The present invention also provides a kind of excitation systems including above-mentioned generator excitation protection circuit.
Description
Technical field
The present invention relates to synchronous generator fields, particularly, are related to a kind of generator excitation protection circuit, the present invention also relates to
And a kind of generator excitation including above-mentioned generator excitation protection circuit protects system.
Background technique
Existing generator excitation protection, generator back-up protection, generator integrated protection can only all be sent out by detecting
It alarms out, and current limliting cannot be provided directly on excitation main circuit and inhibit the protection of surge.
The prior art is mainly improved by the failure of automatic exciter AVR itself output come chaser or AVR redundancy
Reliability, or come chaser when monitoring dynamo current exception by generator back-up protection, these modes are not direct
One is provided on generator excitation circuit actively to protect, and is occurred in middle-size and small-size Gas Turbine Generating Units engineering practice in recent years
Repeatedly due to the silicon-controlled breakdown of automatic exciter AVR, exciter current of generator is caused to increase sharply, generator outlet Current Voltage
All there is the harm of impact upper level power grid in the accident of surge.Once there is a 2MW small power generation unit, hit since AVR is silicon-controlled
Wear the accident that impact upper level power grid causes entire small town to have a power failure.
Summary of the invention
The present invention provides a kind of generator excitation protection circuits and generator excitation to protect system, to solve due to excitation
The technical issues of adjuster failure causes generator moment violent overcurrent to impact power grid.
The technical solution adopted by the invention is as follows:
A kind of generator excitation protection circuit, is used to connect with AC exciter and excitation unit, comprising: for measuring
The multifunctional electric meter of the exciting current of generator excitation circuit, the inhibition unit for inhibiting exciting current, and with inhibition
The electric-controlled switch unit of unit parallel connection；Multifunctional electric meter is used to be less than or equal to rated exciting current time control in exciting current
Electric-controlled switch unit processed, which is shorted, inhibits unit, and control electric-controlled switch unit disconnects when exciting current is more than rated exciting current
Unit investment generator excitation circuit will be inhibited to be used to inhibit exciting current.
Further, inhibit unit include: the inhibition resistance being connected on generator excitation circuit, and with inhibit resistance string
The protective resistance of connection inhibits the both ends of resistance to be parallel with inhibition switch, switch is inhibited to connect with multifunctional electric meter, inhibits electricity
Resistance is for being more than rated exciting current in exciting current and investment generator excitation circuit is used for when less than 2 times of rated exciting currents
Inhibit the increase of exciting current；The both ends of protective resistance are parallel with fastp-acting fuse FU, and fastp-acting fuse FU is used in excitation electricity
Quick fuse is when stream is more than 2 times of rated exciting current to be used for protective resistance investment generator excitation circuit to inhibit moment excessive
Exciting current.
Further, inhibiting resistance includes: the resistance R1, resistance R2 and resistance R3 being sequentially connected in series, and the both ends of resistance R1 are simultaneously
Join relay K1, the both ends of resistance R2 are parallel with relay K2, and the both ends of resistance R3 are parallel with relay K3；Relay K1, K2,
K3 is connect with multifunctional electric meter；
Resistance R1 puts into generator excitation circuit in 1 times to 1.5 times of rated exciting current for exciting current range；
Resistance R2 puts into generator excitation circuit in 1.5 times to 1.7 times of rated exciting current for exciting current range；Resistance R3
Generator excitation circuit is put into 1.7 times to 2 times of rated exciting current for exciting current range.
Further, protective resistance is connect with multifunctional electric meter, and multifunctional electric meter can measure protective resistance two
The voltage at end, and for sending chaser signal when the voltage at protective resistance both ends is greater than 2 times of rated excitation voltage to control hair
Motor chaser.
Further, inhibit the Standard resistance range of resistance for 0.2 times to 1 times of generator rated excitation resistance；Protective resistance
Standard resistance range be 4 times to 6 times of generator rated excitation resistance.
Further, the blowout current of fastp-acting fuse FU is 2 times to 2.5 times of generator rated exciting current.
Further, generator excitation protection circuit further includes connecting and being used for multifunction instrument to detect generator excitation
The current measuring element of exciting current on circuit.
Further, unit both ends are inhibited also to be parallel with afterflow module, afterflow module is for playing afterflow when cutting off excitation
Effect.
Further, afterflow module is multiple concatenated diodes.
According to another aspect of the present invention, a kind of generator excitation protection system is additionally provided, comprising: generator and hair
The AC exciter for being generator excitation of motor connection, what is connect with AC exciter is used to provide for AC exciter
Field power supply and the excitation unit that exciting current is adjusted according to the electric current of generator output, further include connection excitation unit and friendship
The above-mentioned generator excitation for flowing exciter protects circuit.
The invention has the following advantages:
Generator excitation of the invention protects circuit, which includes: for measuring generator excitation circuit
Exciting current more kinetic energy electric instruments, the inhibition unit for inhibiting exciting current, and it is in parallel with the inhibition unit
Electric-controlled switch unit.When exciting current is more than rated exciting current, will inhibit in unit investment generator excitation circuit with suppression
Exciting current processed.Engine excitation protecting circuit of the invention is that the protection for inhibiting surge is provided directly on excitation main circuit,
Inhibit unit that exciting current is inhibited acutely to become larger by investment in exciter current of generator exception, avoids due to excitation unit
Silicon-controlled breakdown when, the problem of generator immediate current crosses large impact power grid, improves the stability of excitation unit and reliable
Property.
Generator excitation of the invention protects system, is generated electricity by being arranged between connection excitation unit and AC exciter
Machine excitation protecting circuit, when exciting current be more than rated exciting current when, will inhibit unit investment generator excitation circuit in
Inhibit exciting current.Excitation protection system of the invention is that the protection for inhibiting surge is provided directly on excitation main circuit, is being sent out
When motor energization current exception by investment inhibit unit inhibit exciting current acutely become larger, avoid due to excitation unit can
When controlling silicon breakdown, the problem of generator immediate current crosses large impact power grid, the stability and reliability of excitation system are improved.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to accompanying drawings, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the engine excitation protecting circuit of the preferred embodiment of the present invention；
Fig. 2 is the another structural schematic diagram of the engine excitation protecting circuit of the preferred embodiment of the present invention.
Drawing reference numeral explanation:
10, generator；20, AC exciter；30, excitation unit；40, excitation protecting circuit；41, multifunction power instrument
Table；42, inhibit unit；421, inhibit resistance；422, protective resistance；43, electric-controlled switch unit；50, permanent magnetic motor.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to FIG. 1 and FIG. 2, the preferred embodiment of the present invention provides a kind of generator excitation protection circuit, be used for
AC exciter 20 and excitation unit 30 connect, and the engine between AC exciter 20 and excitation unit 30 can be inhibited to encourage
Exciting current on magnetic loop increased dramatically, and play the role of surge protection.The excitation protecting circuit 40 includes: for measuring
The multifunctional electric meter 41 of the exciting current of generator excitation circuit, the inhibition unit 42 for inhibiting exciting current, and with
The electric-controlled switch unit 43 for inhibiting unit 42 in parallel, multifunctional electric meter 41 are used to be less than rated exciting current in exciting current
When control electric-controlled switch unit 43 closure be shorted inhibit unit 42, and exciting current be more than rated exciting current when control electricity
Control switch unit 43 is disconnected so that unit 42 will be inhibited to put into generator excitation circuit and be used to inhibit exciting current.
The generator excitation of the present embodiment protects circuit, when the exciting current of excitation unit 30 is more than rated exciting current
When, unit 42 will be inhibited to put into generator excitation circuit to inhibit exciting current, avoided silicon-controlled when excitation unit 30
When breakdown, generator immediate current is excessive and causes the problem of impacting power grid.Excitation protecting circuit of the invention is directly to exist
The protection for inhibiting surge is provided on excitation main circuit, inhibits the inhibition of unit 42 to encourage by investment in exciter current of generator exception
Magnetoelectricity stream acutely becomes larger, when excitation unit 30 it is silicon-controlled breakdown when, prevent exciting current excessive and lead to generator moment
Violent overcurrent avoids the impact to higher level's power grid.
Preferably, inhibiting unit 42 includes: the inhibition resistance 421 being connected on generator excitation circuit, and electric with inhibition
421 concatenated protective resistances 422 are hindered, inhibits the both ends of resistance 421 to be parallel with inhibition switch, inhibits switch and multifunction power instrument
Table 41 connects, and resistance 421 is inhibited to be used to put into generator excitation circuit when exciting current is more than rated exciting current for pressing down
Exciting current fluctuation processed；
The both ends of protective resistance 422 are parallel with fastp-acting fuse FU, and fastp-acting fuse FU is used in exciting current be more than volume
Determine quick fuse when 2 times of exciting current, it is preferable that the blowout current of fastp-acting fuse FU is generator rated exciting current
2 times to 2.5 times；Protective resistance 422 is used to put into generator excitation circuit when exciting current is more than 2 times of rated exciting current and use
Play the role of further protecting generator 10 in the exciting current for inhibiting moment excessive.
Preferably, the both ends of protective resistance 422 are also connected with multifunctional electric meter 41, and multifunctional electric meter 41 can be with
The voltage at 422 both ends of protective resistance is measured, and is used for when the voltage at 422 both ends of protective resistance is greater than 2 times of rated excitation voltage,
Chaser signal is sent to gen-set control system for controlling 10 chaser of generator.
In the present embodiment, when excitation unit 30 works normally, inhibiting resistance 421 is to be suppressed switch short, more function
Energy electric instrument 41 inhibits switch for controlling.When being more than rated exciting current and when less than 2 times of rated exciting currents, will inhibit
Resistance 421 puts into generator excited system, for inhibiting excessive exciting current.And when exciting current is more than 2 times of rated excitations
When electric current, protective resistance 422 is put into generator excitation circuit, for inhibiting moment excessive exciting current, multifunction power
Instrument 41 sends chaser signal to gen-set control system, for controlling 10 chaser of generator, thoroughly avoid generator 10 by
In abnormal excitation leads to violent overcurrent the problem of.
Preferably, inhibiting resistance 421 includes: the resistance R1, resistance R2 and resistance R3 being sequentially connected in series, and the both ends of resistance R1 are simultaneously
Join relay K1, the both ends of resistance R2 are parallel with relay K2, and the both ends of resistance R3 are parallel with relay K3.
Resistance R1 puts into generator excitation circuit in 1 times to 1.5 times of rated exciting current for exciting current range,
Resistance R2 puts into generator excitation circuit, resistance R3 in 1.5 times to 1.7 times of rated exciting current for exciting current range
Generator excitation circuit is put into 1.7 times to 2 times of rated exciting current for exciting current range.
In the present embodiment, inhibiting the Standard resistance range of resistance 421 is 0.2 times to 1 times of generator excitation rated resistance, and
The Standard resistance range of protective resistance 422 is 4 times to 6 times of generator rated excitation resistance.
In the present embodiment, the resistance value of resistance R1, resistance R2 and resistance R3 are the 0.2 of generator excitation rated resistance
Times, and the resistance value of protective resistance 422 is 5 times of generator rated excitation resistance.
Specifically, the resistance value of this 3 inhibition resistance 421 of resistance R1, resistance R2 and resistance R3 is smaller, is generator excitation
0.2 times of machine excitation winding resistance, when excitation unit 30 works normally, this 3 resistance are respectively by relay K1, relay
What K2 and relay K3 was shorted, multifunctional electric meter 41 is used to control the opening of relay K1, relay K2 and relay K3
Or it closes.
Inhibit resistance 421 with the following functions: on the one hand, being found during engineering practice, what excitation unit 30 exported
Energized circuit resistance cannot be too small, and the too small or less than normal situation of resistance, 30 output stability of excitation unit can be poor, power generation
Machine excitation can be very low, can at this time put into this 3 and inhibit resistance 421 to improve the stability of excitation system.
On the other hand, when big ups and downs in short-term occur for exciter current of generator, this 3 resistance, which are successively thrown, moves back active suppression excitation electricity
Stream fluctuation is set when exciting current is more than 1.5 times of rated exciting current in the present embodiment, and multifunctional electric meter 41 is controlled
Relay K1 processed is disconnected so that resistance R1 puts into generator excitation circuit.When exciting current is more than 1.7 times of rated exciting current,
Multifunctional electric meter 41 controls relay K2 and disconnects so that resistance R2 puts into generator excitation circuit.When exciting current is more than volume
The control of multifunctional electric meter 41 relay K3 makes resistance R3 put into generator excitation circuit when determining 1.9 times of exciting current.When
After exciting current reforms into rated exciting current, multifunctional electric meter 41 controls relay K1, relay K2 and relay
Device K3 closure, resistance R1, resistance R2 and resistance R3 are shorted again.
In other embodiments, the limit of investment resistance R1, resistance R2 and resistance R3 are limited according to different duty requirements
Condition processed.
Referring to Fig. 2, in the present embodiment, R4 is protective resistance 422, and the blowout current of fastp-acting fuse FU is generator volume
2.2 times for determining exciting current, in the normal situation of excitation, R4 is by fastp-acting fuse FU short circuit, and R4 is not put at this time
Energized circuit.When exciting current generation is acutely abnormal and more than 2.2 times of rated exciting currents, fastp-acting fuse FU moment is melt
Disconnected, R4 is put into generator excitation circuit at this time, moment can inhibit excessive exciting current since R4 resistance value is very big, further protect
Hair care motor 10.Multifunctional electric meter 41 measures the voltage at the both ends R4 simultaneously, when multifunctional electric meter 41 detects R4 two
When the voltage at end is more than 2 times of rated excitation voltage, multifunctional electric meter 41 can export chaser signal and give generator set control system
System, gen-set control system control 10 chaser of generator.The protective resistance 422 of the present embodiment provides one to excitation unit 30
The time of a buffering can allow 41 having time of multifunctional electric meter to output signal to gen-set control system control generator
10 chasers；Avoid excitation unit 30 it is silicon-controlled breakdown when since exciting current sharp increase is unable to control and collapses so as to cause power grid
Routed accident, while it is also possible to damage generator 10.
Specifically, multifunctional electric meter 41 controls No. 4 relays output, is respectively used to control relay K1, relay
The open or close of K2 and relay K3, and relay exports jump machine control signal to gen-set control system to control all the way
10 chaser of generator.
The excitation protecting circuit of the present embodiment passes through the inhibition resistance of the small resistance value of investment in exciter current of generator exception
Exciting current is inhibited acutely to become larger, further stabilization of excitation device；Lead to when exciter current of generator acutely increases uncontrollable
Fastp-acting fuse cutting generator excitation circuit is crossed, protective resistance is put into generator excitation circuit, is simultaneously emitted by chaser signal
Generator is protected, generator can thoroughly be avoided to lead to violent overcurrent due to abnormal excitation.It solves controllable inside excitation unit
The technical issues of when silicon punctures, exciting current is unable to control, and the violent overcurrent of generator is caused to impact power grid.It is compared to existing
Some generator excitation protections are mainly the back-up protection of generator, by detecting the current anomaly of generator output end to send out
It alarms out；The present invention is to provide current limliting directly on generator excitation circuit and inhibit the protection of surge.
Preferably, the generator excitation protection circuit further includes connecting with the multifunctional electric meter 41 and for examining
The current measuring element of the exciting current on generator excitation circuit is surveyed, current measuring element is used for generator excitation circuit
Electric current be converted into standard signal and send multifunctional electric meter 41 to, in order to multifunctional electric meter 41 measure generator
The electric current of energized circuit.In the present embodiment, current measuring element is current divider EL.In other embodiments, current detecting member
Part can be ammeter, current sensor or current transformer etc..
Preferably, inhibit the both ends of unit 42 to be also parallel with afterflow module, afterflow module be the diode D1 being sequentially connected in series,
Diode D2 and diode D3.The effect of the afterflow module is to play the role of afterflow when cutting off excitation, prevent from handing over
The excitation winding for flowing exciter 20 generates transient high voltages, avoids the high voltage transient from generating impact to excitation unit 30, plays guarantor
Protect the effect of excitation unit 30.The generator excitation of the present embodiment protects circuit, goes to share wink by three concatenated diodes
State high pressure prevents diode breakdown, improves the reliability and stability of excitation unit 30.It is appreciated that in of the invention its
In his embodiment, afterflow module also may include two, four, five or six concatenated diodes.
Generator excitation of the invention protects circuit, inhibits unit to inhibit by being arranged on generator excitation major loop
Exciting current inhibits exciting current acutely to become larger, encourages in generator in exciter current of generator exception by putting into small resistance
Energized circuit is cut off by fastp-acting fuse when magnetoelectricity stream is uncontrollable and is simultaneously emitted by chaser signal protection generator, can thoroughly be avoided
Generator leads to violent overcurrent due to abnormal excitation.In addition, compared with prior art, generator excitation of the invention protects electricity
Line structure is simple, debugging is convenient, can be according to different unit operating conditions, it is only necessary to change relay, resistance, fastp-acting fuse it is big
It is small to be applicable to the different generating set of various capacity；The circuit of generator excitation protection simultaneously can be integrated in an electric box
It is mounted on engine block on the spot, is used for old repowering, also can integrate in generator excitation panel, it is applied widely.
The present invention also provides a kind of generator excitations to protect system, which includes: generator 10 and power generation
Machine 10 connect for be generator excitation AC exciter 20, connect with AC exciter 20 be used for be AC exciter
20 offer field power supplies simultaneously adjust the excitation unit 30 of exciting current, and connection excitation unit 30 and AC exciter 20 are encouraged
Magnetic protects circuit.The excitation protecting circuit is above-mentioned excitation protecting circuit 40.
Referring to Fig. 2, excitation unit 30 is automatic exciter AVR, and automatic exciter is also connected with permanent magnetic motor 50, permanent magnetism
Machine 50 is used to provide power power-supply for automatic exciter.Automatic exciter AVR is the prior art, is no longer explained in detail herein
It states.
The excitation protection system further include: gen-set control system, gen-set control system connect multifunction power
Instrument 41, for receiving the chaser signal of the transmission of multifunctional electric meter 41.When the voltage at 422 both ends of protective resistance is greater than 2 times
When rated excitation voltage, multifunctional electric meter 41 sends chaser signal to gen-set control system for controlling generator 10
Chaser.
Generator excitation of the invention protects system, by be arranged on generator excitation major loop excitation protecting circuit come
Inhibit exciting current, inhibits exciting current acutely to become larger by putting into small resistance in exciter current of generator exception, generating electricity
Energized circuit is cut off by fastp-acting fuse when machine exciting current is uncontrollable and is simultaneously emitted by chaser signal protection generator, it can be thoroughly
It avoids generator since abnormal excitation leads to violent overcurrent, improves the stability and reliability of generator excited system.Separately
Outside, compared with prior art, generator excitation of the invention protection system structure is simple, debugging is convenient, can be according to different machines
Group operating condition, it is only necessary to change relay, resistance, fastp-acting fuse size be applicable to the different generator of various capacity
Group.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of generator excitation protects circuit, it is used to connect with AC exciter (20) and excitation unit (30), feature
It is, comprising: for measuring the multifunctional electric meter (41) of the exciting current of generator excitation circuit, for inhibiting excitation electric
The inhibition unit (42) of stream, and the electric-controlled switch unit (43) in parallel with inhibition unit (42)；
The multifunctional electric meter (41) is used to control when exciting current is less than or equal to rated exciting current described automatically controlled
Switch unit (43) is shorted the inhibitions unit (42), and controls when exciting current is more than rated exciting current described automatically controlled open
Unit (43) are closed to disconnect so that the inhibition unit (42) is put into the generator excitation circuit for inhibiting exciting current.
2. generator excitation according to claim 1 protects circuit, which is characterized in that
Inhibition unit (42) includes: the inhibition resistance (421) being connected on the generator excitation circuit, and with the suppression
The concatenated protective resistance of resistance (421) processed (422), the both ends for inhibiting resistance (421) are parallel with inhibition switch, inhibit switch
It is connect with the multifunctional electric meter (41), the inhibition resistance (421) is used in exciting current be more than rated exciting current
And the generator excitation circuit is put into when less than 2 times of rated exciting currents for inhibiting the increase of exciting current；
The both ends of the protective resistance (422) are parallel with fastp-acting fuse FU, and the fastp-acting fuse FU is used in exciting current
Quick fuse is used for when more than 2 times of rated exciting current with the protective resistance (422) are put into the generator excitation circuit
Inhibit the exciting current that moment is excessive.
3. generator excitation according to claim 2 protects circuit, which is characterized in that
Inhibition resistance (421) includes: the resistance R1 being sequentially connected in series, resistance R2 and resistance R3, and the both ends of the resistance R1 are simultaneously
Join relay K1, the both ends of the resistance R2 are parallel with relay K2, and the both ends of the resistance R3 are parallel with relay K3；Relay
Device K1, K2, K3 are connect with the multifunctional electric meter (41)；
The resistance R1 puts into the generator excitation in 1 times to 1.5 times of rated exciting current for exciting current range
Circuit；The resistance R2 puts into the generator in 1.5 times to 1.7 times of rated exciting current for exciting current range and encourages
Magnetic loop；The resistance R3 puts into the generator in 1.7 times to 2 times of rated exciting current for exciting current range and encourages
Magnetic loop.
4. generator excitation according to claim 2 protects circuit, which is characterized in that
The protective resistance (422) connect with the multifunctional electric meter (41), and the multifunctional electric meter (41) can survey
The voltage at the protective resistance (422) both ends is measured, and specified greater than 2 times for the voltage when the protective resistance (422) both ends
Chaser signal is sent when excitation voltage to control generator chaser.
5. generator excitation according to claim 2 protects circuit, which is characterized in that
The Standard resistance range for inhibiting resistance (421) is 0.2 times to 1 times of generator rated excitation resistance；
The Standard resistance range of the protective resistance (422) is 4 times to 6 times of generator rated excitation resistance.
6. generator excitation according to claim 2 protects circuit, which is characterized in that
The blowout current of the fastp-acting fuse FU is 2 times to 2.5 times of generator rated exciting current.
7. generator excitation according to claim 1 protects circuit, which is characterized in that
The generator excitation protection circuit further includes connecting with the multifunction instrument (41) and for detecting generator excitation
The current measuring element of exciting current on circuit.
8. generator excitation according to claim 1 protects circuit, which is characterized in that
Inhibition unit (42) both ends are also parallel with afterflow module, and the afterflow module is for playing afterflow work when cutting off excitation
With.
9. generator excitation according to claim 8 protects circuit, which is characterized in that
The afterflow module is multiple concatenated diodes.
10. a kind of generator excitation protects system, comprising: generator (10), connect with the generator (10) for being to send out
The AC exciter (20) of motor excitation, what is connect with the AC exciter (20) is used to mention for the AC exciter (20)
The excitation unit (30) of exciting current is adjusted for field power supply and according to the electric current of the generator (10) output, feature exists
In,
Further include connect the excitation unit (30) and the AC exciter (20) the claims 1 to 9 it is any described
Generator excitation protect circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811336940.2A CN109378809B (en) | 2018-11-12 | 2018-11-12 | Generator excitation protection circuit and generator excitation protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811336940.2A CN109378809B (en) | 2018-11-12 | 2018-11-12 | Generator excitation protection circuit and generator excitation protection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109378809A true CN109378809A (en) | 2019-02-22 |
| CN109378809B CN109378809B (en) | 2020-05-15 |
Family
ID=65384445
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811336940.2A Active CN109378809B (en) | 2018-11-12 | 2018-11-12 | Generator excitation protection circuit and generator excitation protection system |
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| CN1756021A (en) * | 2004-09-28 | 2006-04-05 | 中国科学院电工研究所 | A kind of short-circuit fault current limiter |
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| CN102397624A (en) * | 2010-09-17 | 2012-04-04 | 鼎迈医疗科技(苏州)有限公司 | Implantable active electronic device with overcurrent protection circuit and electric stimulation system |
| CN103684156A (en) * | 2012-09-05 | 2014-03-26 | 刘刚 | A generator excitation system winding current distribution device and a method |
| CN204231249U (en) * | 2014-11-20 | 2015-03-25 | 辽河石油勘探局 | From and field regulator parallel resistance device |
| CN106655933A (en) * | 2016-12-02 | 2017-05-10 | 苏州迪森生物能源有限公司 | High-voltage grid-connected excitation system |
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2018
- 2018-11-12 CN CN201811336940.2A patent/CN109378809B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1756021A (en) * | 2004-09-28 | 2006-04-05 | 中国科学院电工研究所 | A kind of short-circuit fault current limiter |
| CN201038785Y (en) * | 2007-04-06 | 2008-03-19 | 广州扬风电器工业有限公司 | Generator excitation difference adjusting circuit |
| CN102397624A (en) * | 2010-09-17 | 2012-04-04 | 鼎迈医疗科技(苏州)有限公司 | Implantable active electronic device with overcurrent protection circuit and electric stimulation system |
| CN103684156A (en) * | 2012-09-05 | 2014-03-26 | 刘刚 | A generator excitation system winding current distribution device and a method |
| CN204231249U (en) * | 2014-11-20 | 2015-03-25 | 辽河石油勘探局 | From and field regulator parallel resistance device |
| CN106655933A (en) * | 2016-12-02 | 2017-05-10 | 苏州迪森生物能源有限公司 | High-voltage grid-connected excitation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109378809B (en) | 2020-05-15 |
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