CN107276456A - The super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure - Google Patents
The super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure Download PDFInfo
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- CN107276456A CN107276456A CN201710439534.8A CN201710439534A CN107276456A CN 107276456 A CN107276456 A CN 107276456A CN 201710439534 A CN201710439534 A CN 201710439534A CN 107276456 A CN107276456 A CN 107276456A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/28—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive increase of voltage applied to primary circuit of motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The present invention relates to the soft Starting Technology of the super high-capacity motor of high pressure, specifically related to the super high-capacity motor self-coupling voltage reducing of high pressure compensates integrated soft start control method, and the control method includes self-coupling voltage reducing current limliting subsystem reduced-voltage starting and dynamic reactive power compensation subsystem carries out dynamic reactive power compensation；Self-coupling voltage reducing current limliting subsystem reduced-voltage starting includes auto-coupling voltage-reduction starting and series connection magnet controlled reactor reduced-voltage starting；Comprise the following steps：Step 1, auto-coupling voltage-reduction starting；Step 2, series connection magnet controlled reactor reduced-voltage starting；Step 3, dynamic reactive power compensation；Step 4, soft start terminate.The control method can smoothly change the impedance of high-pressure side and low-pressure side, and starting current is small, and startability is stable, improve the power factor in start-up course.
Description
Technical field
The invention belongs to the soft Starting Technology field of the super high-capacity motor of high pressure, more particularly to the super high-capacity electricity of high pressure
The integrated soft start control method of machine self-coupling voltage reducing compensation.
Background technology
When the super high-capacity motor of high pressure is directly initiated, starting current would generally reach 4 to 7 times of rated current, and this is right
Power system and motor can all cause very big impact in itself.Current reduced-voltage starting is one of the most frequently used startup method, its
In be divided into auto-coupling voltage-reduction starting, series connection controlled reactor reduced-voltage starting etc..
A kind of patent of invention " integrated soft starting device of self-coupling voltage reducing compensation（CN104124905A）" introduce it is soft
The body construction of starter, but the specific control method based on the soft starting device is not illustrated, and use traditional control
There is the problem of power factor in start-up course is low, reactive power can not obtain effective compensation in method.
The content of the invention
It is an object of the invention to provide a kind of self-coupling voltage reducing current limliting subsystem reduced-voltage starting and dynamic reactive power compensation
System realizes dynamic reactive power compensation, to reduce starting current, improves the super high-capacity of high pressure of start-up course power factor
The integrated soft initiator control method of motor self-coupling voltage reducing compensation.
To achieve the above object, the technical solution adopted by the present invention is：The super high-capacity motor self-coupling voltage reducing compensation of high pressure
Integrated soft start control method, the control method includes self-coupling voltage reducing current limliting subsystem reduced-voltage starting and dynamic reactive power
Compensation subsystem carries out dynamic reactive power compensation；Self-coupling voltage reducing current limliting subsystem reduced-voltage starting includes auto-coupling voltage-reduction starting and string
Join magnet controlled reactor reduced-voltage starting；Comprise the following steps：
Step 1, auto-coupling voltage-reduction starting；
In the starting stage of electric motor starting, then first closed high circuit breaker Q F closes contactor KM2, KM5, KM4, KM6；Make
The auto-transformer that the winding N1 and N2 that motor compensates integrated soft initiator by self-coupling voltage reducing are constituted is motor partial pressure, is realized
Auto-coupling voltage-reduction starting；
Step 2, series connection magnet controlled reactor reduced-voltage starting；
After auto-coupling voltage-reduction starting terminates, into the reduced-voltage starting of series connection magnet controlled reactor；Contactor KM5 is disconnected, contactor is closed
KM3 so that motor is connected with magnet controlled reactor MCR1；Motor is reduced by changing magnet controlled reactor MCR1 equivalent reactance value
Terminal voltage, realizes magnet controlled reactor reduced-voltage starting；
Step 3, dynamic reactive power compensation；
In two stages of magnet controlled reactor reduced-voltage starting of being connected described in auto-coupling voltage-reduction starting described in step 1 and step 2, by cutting
Changing-over tentaculum KM5 and KM3 so that the coupling branch road that auto-transformer and magnet controlled reactor are constituted and LC in parallel compensation branch roads are common
Soft start stage dynamic reactive power compensation is provided；
Step 4, soft start terminate；
Rated current is dropped to when detecting electric current, when motor is close to rated speed, then contactor KM2, KM3, KM4 is disconnected, closes
Splice grafting tentaculum KM1, makes the integrated soft initiator short circuit of self-coupling voltage reducing compensation, and soft start-up process terminates.
In the above-mentioned super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure, step 1 institute
Stating the realization of auto-coupling voltage-reduction starting includes, and IGCT T1 is not added with trigger signal, and magnet controlled reactor MCR1 and MCR2 series connection are constituted certainly
Coupling transformer, no-load voltage ratio K=N1/ of auto-coupling voltage-reduction starting is determined according to the minimum starting current of motor and minimum detent torque
N2, is the rated voltage that motor supplies 50%-70%, realizes auto-coupling voltage-reduction starting.
In the above-mentioned super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure, step 2 institute
Stating the realization of magnet controlled reactor reduced-voltage starting includes voltage and current sensor by electric motor starting electric signal access controller, control
Device is according to motor parameter, setting starting current value and relevant parameter and Booting sequence, carry out soft start control algolithm calculate and
The coordination control of soft start logic judgment, one is changed by controlling IGCT to change the secondary coil impedance of magnet controlled reactor
Secondary coil impedance, so as to realize magnet controlled reactor reduced-voltage starting.
In the above-mentioned super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure, step 3 institute
The realization for stating dynamic reactive power compensation is included in during self-coupling voltage reducing and magnet controlled reactor reduced-voltage starting, and it is right that controller passes through
Starting current, the measure of the parameter of electric machine such as voltage, calculates active power and power factor, determines reactive power compensation amount；Enter
And trigger signal is sent to IGCT T2, change magnet controlled reactor MCR2 equivalent reactance value, then branch circuit parallel connection is compensated with LC, from
And realize soft start stage dynamic reactive power compensation.
In the above-mentioned super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure, in soft start
After end, the integrated soft initiator access power network of self-coupling voltage reducing compensation, the nothing for normal operating motor and power network
Work(is compensated.
Beneficial effects of the present invention：
1. self-coupling voltage reducing current limliting subsystem and dynamic reactive power compensation subsystem are designed to couple to one by circuit and magnetic circuit
Rise so that two kinds of functions of auto-transformer and magnet controlled reactor combine, and magnet controlled reactor MCR2 had both constituted self coupling transformation
Device, also plays the effect of the dynamic compensation of reactive power.
2. reducing starting current by two ways, the control of IGCT is main in low-pressure side, and whole process realizes soft
The smooth control started, reduces the impact to electric power system, reduces user's power supply consumption, and startability is stable.
3. because magnet controlled reactor has the advantages that harmonic wave is small, the content of harmonic wave can also be reduced in start-up course.
4. in start-up course, reactive power dynamic compensation is added, the problem of power factor is low in start-up course is solved,
Startup simultaneously, which terminates the rear integrated soft starting device of self-coupling voltage reducing compensation, to be connected on power network, to normal operating motor
And power network carries out reactive-load compensation, realizes making full use of for device.
Brief description of the drawings
Fig. 1 is the super integrated soft start controlling party of high-capacity motor self-coupling voltage reducing compensation of one embodiment of the invention high pressure
Method schematic diagram.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
The example of the embodiment is shown in the drawings, wherein same or similar label represents identical or class from beginning to end
As element or the element with same or like function.The embodiments described below with reference to the accompanying drawings are exemplary, only
For explaining the present invention, and it is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples are described.They are only merely illustrative, and purpose is not
It is to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.This repetition be for
Simplify and clear purpose, the relation between discussed various embodiments and/or setting itself is not indicated.In addition, this hair
The bright example for providing various specific techniques and material, but those of ordinary skill in the art can be appreciated that other techniques
The use of applicability and/or other materials.In addition, fisrt feature described below second feature it " on " structure can be with
The embodiment for being formed as directly contacting including the first and second features, can also include other feature formation first and second
Embodiment between feature, such first and second feature may not be direct contact.
, it is necessary to explanation in description of the invention, unless otherwise prescribed and limit, term " connected " " connection " should do extensively
Reason and good sense solution, can be joined directly together for example, it may be mechanically connecting or electrical connection or the connection of two element internals,
It can also be indirectly connected to, for those of ordinary skill in the related art, can managed as the case may be by intermediary
Solve the concrete meaning of above-mentioned term.
The present embodiment is realized using following technical scheme：The super high-capacity motor self-coupling voltage reducing compensation integration of high pressure is soft
Start control method, the control method includes self-coupling voltage reducing current limliting subsystem reduced-voltage starting and dynamic reactive power compensation subsystem
System carries out dynamic reactive power compensation；Self-coupling voltage reducing current limliting subsystem reduced-voltage starting includes auto-coupling voltage-reduction starting and series connection magnetic control electricity
Anti- device reduced-voltage starting；Comprise the following steps：
Step 1, auto-coupling voltage-reduction starting；
In the starting stage of electric motor starting, then first closed high circuit breaker Q F closes contactor KM2, KM5, KM4, KM6；Make
The auto-transformer that the winding N1 and N2 that motor compensates integrated soft initiator by self-coupling voltage reducing are constituted is motor partial pressure, is realized
Auto-coupling voltage-reduction starting；
Step 2, series connection magnet controlled reactor reduced-voltage starting；
After auto-coupling voltage-reduction starting terminates, into the reduced-voltage starting of series connection magnet controlled reactor；Contactor KM5 is disconnected, contactor is closed
KM3 so that motor is connected with magnet controlled reactor MCR1；Motor is reduced by changing magnet controlled reactor MCR1 equivalent reactance value
Terminal voltage, realizes magnet controlled reactor reduced-voltage starting；
Step 3, dynamic reactive power compensation；
In two stages of magnet controlled reactor reduced-voltage starting of being connected described in auto-coupling voltage-reduction starting described in step 1 and step 2, by cutting
Changing-over tentaculum KM5 and KM3 so that the coupling branch road that auto-transformer and magnet controlled reactor are constituted and LC in parallel compensation branch roads are common
Soft start stage dynamic reactive power compensation is provided；
Step 4, soft start terminate；
Rated current is dropped to when detecting electric current, when motor is close to rated speed, then contactor KM2, KM3, KM4 is disconnected, closes
Splice grafting tentaculum KM1, makes the integrated soft initiator short circuit of self-coupling voltage reducing compensation, and soft start-up process terminates.
Further, the realization of auto-coupling voltage-reduction starting described in step 1 includes, and IGCT T1 is not added with trigger signal, magnetic control reactance
Device MCR1 and MCR2 connect, and constitute auto-transformer, are determined certainly according to the minimum starting current of motor and minimum detent torque
No-load voltage ratio K=N1/N2 of coupling reduced-voltage starting, is the rated voltage that motor supplies 50%-70%, realizes auto-coupling voltage-reduction starting.
Further, the realization of magnet controlled reactor reduced-voltage starting described in step 2 opens motor including voltage and current sensor
Dynamic electric signal access controller, controller enters according to motor parameter, setting starting current value and relevant parameter and Booting sequence
Row soft start control algolithm is calculated and the coordination of soft start logic judgment is controlled, by controlling IGCT to change magnet controlled reactor
Secondary coil impedance changes its primary winding impedance, so as to realize magnet controlled reactor reduced-voltage starting.
Further, the realization of dynamic reactive power compensation described in step 3 is included in self-coupling voltage reducing and magnet controlled reactor decompression
In start-up course, controller is by starting current, the measure of the parameter of electric machine such as voltage, calculate active power and power because
Number, determines reactive power compensation amount；And then trigger signal is sent to IGCT T2, change magnet controlled reactor MCR2 equivalent reactance
Value, then branch circuit parallel connection is compensated with LC, so as to realize soft start stage dynamic reactive power compensation.
Further, after soft start terminates, the integrated soft initiator access power network of self-coupling voltage reducing compensation, for normal
The reactive-load compensation of operating motor and power network.
When it is implemented, the super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure, by self coupling
Decompression current limliting subsystem and dynamic reactive power compensation subsystem constitute to realize reduction starting current, improve in start-up course
The purpose of power factor, this method comprises the following steps：
1st, auto-coupling voltage-reduction starting
In the starting stage of electric motor starting, primary cut-out QF is first closed, contactor KM2, KM5, KM4, KM6 is then closed.This
When, the auto-transformer that the winding N1 and N2 that motor compensates integrated starter by self-coupling voltage reducing are constituted gives motor partial pressure, real
Existing reduced-voltage starting.
2nd, series connection magnet controlled reactor reduced-voltage starting
After auto-coupling voltage-reduction starting terminates, into the soft start stage of series connection magnet controlled reactor.Contactor KM5 is disconnected, contact is closed
Device KM3, motor is connected with magnet controlled reactor MCR1.Motor terminal voltage is reduced by changing MCR1 equivalent reactance value, is realized
Reduced-voltage starting.
3rd, dynamic reactive power compensation
Two stages of self-coupling voltage reducing and magnet controlled voltage regulating more than, the coupling branch road that auto-transformer and magnet controlled reactor are constituted with
LC in parallel compensates switching of the branch road by contactor KM5 and KM3, the common compensation for providing dynamic reactive power.
4th, soft start terminates
Drop to rated current when detecting electric current, motor then disconnects contactor KM2, KM3, KM4, closed close to rated speed
Contactor KM1, by the integrated soft initiator short circuit of self coupling magnetic control reactive-load compensation, start-up course terminates.
Also, in the auto-coupling voltage-reduction starting stage, IGCT T1 is not added with trigger signal, MCR1 and MCR2 series connection, equivalent to structure
Into an auto-transformer, the no-load voltage ratio of auto-coupling voltage-reduction starting is determined according to the minimum starting current of motor and minimum detent torque
K=N1/N2, is the rated voltage of motor supply about 50% to 70%, realizes auto-coupling voltage-reduction starting.
Also, in series connection magnet controlled reactor reduced-voltage starting stage, the method started using constant current.In electric current ascent stage,
Starting current is much smaller than current setting value, takes PI（Proportional integration）The control method of regulation.Wherein, proportional action, system is fast
Speed reduces current deviation, and integral action eliminates the deviation between electric current and limit value.When motor terminal voltage is gradually increasing, from
Coupling magnetic control drop compensation integration soft initiator both end voltage is gradually reduced.Now by controlling magnet controlled reactor MCR1 brilliant lock
The pipe T1 angle of flow, produces DC control current, makes core of reactor magnetic saturation, and equivalent reactance value reduces, and then maintains electric current
It is constant.Specific magnetic control reactance transformation is adjusted to：Voltage and current sensor controls motor start-up electric signal access controller
Device is according to motor parameter, and setting starting current value and relevant parameter and Booting sequence etc. carry out soft start control algolithm calculating
Coordinate control with soft start logic judgment etc., by controlling the impedance of thyristor type impedance transformer to change magnetic control reactance converter
Secondary coil impedance change its primary winding impedance, so as to realize series connection magnet controlled reactor reduced-voltage starting.
Also, dynamic reactive power compensation subsystem, including the coupling branch road that auto-transformer and magnet controlled reactor are constituted
Branch road is compensated with LC in parallel.Self-coupling voltage reducing and series connection magnetic control decompression whole start-up course in, controller by starting current,
The measure of the parameters of electric machine such as voltage, calculates active power and power factor, determines reactive power compensation amount, and then to magnetic control electricity
Anti- device MCR2 IGCT T2 sends trigger signal, changes MCR2 equivalent reactance value, then compensates branch circuit parallel connection with LC, realizes soft
The dynamic compensation of startup stage reactive power.
Self-coupling voltage reducing current limliting subsystem and dynamic reactive power compensation subsystem are designed to couple to by circuit and magnetic circuit
Together, magnet controlled reactor MCR2 both constitutes auto-transformer, also plays the effect of the dynamic compensation of reactive power.
Moreover, after soft start terminates, the integrated soft initiator of self-coupling voltage reducing compensation can also be connected on power network, aligned
Often operating motor and power network carry out reactive-load compensation, realize making full use of for device.
As shown in figure 1, the super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure, including self coupling
Current limliting and dynamic reactive power compensation two large divisions are depressured, its applicable parameter of electric machine is：Voltage 6kV~35kV, power of motor
20000kW~50000kW.It can realize below 1.5 times of rated current of starting current, harmonic content≤5%.Specific steps are such as
Under：
（1）Auto-coupling voltage-reduction starting
In the starting stage of electric motor starting, primary cut-out QF is first closed, contactor KM2, KM5, KM4, KM6 is then closed.This
When, the auto-transformer that the winding N1 and N2 that motor compensates integrated soft initiator by self-coupling voltage reducing are constituted gives motor partial pressure,
IGCT T1 is not added with trigger signal, magnet controlled reactor MCR1 and MCR2 series connection, equivalent to an auto-transformer is constituted, according to electricity
The minimum starting current of machine determines no-load voltage ratio K=N1/N2 of auto-coupling voltage-reduction starting with minimum detent torque, is that motor is supplied about
50% to 70% rated voltage, realizes auto-coupling voltage-reduction starting.
（2）Series connection magnet controlled reactor reduced-voltage starting
After auto-coupling voltage-reduction starting terminates, into the soft start stage of series connection magnet controlled reactor.Contactor KM5 is disconnected, contact is closed
Device KM3.The method started using constant current.In electric current ascent stage, starting current is much smaller than current setting value, takes PI（Ratio
Integration）The control method of regulation.Wherein, proportional action, system quickly reduces current deviation, and integral action eliminates electric current and limit
Deviation between definite value.When motor terminal voltage is gradually increasing, self coupling magnetic control drop compensation integration soft initiator both end voltage
It is gradually reduced.Now by the angle of flow for the IGCT T1 for controlling magnet controlled reactor MCR1, DC control current is produced, makes magnetic control
Core of reactor magnetic saturation, equivalent reactance value reduces, and then maintains electric current constant.Specific magnet controlled reactor conversion is adjusted to：Electricity
Pressure and current sensor are by motor start-up electric signal access controller, and controller sets starting current according to motor parameter
Value and relevant parameter and Booting sequence etc., carry out the calculating of soft start control algolithm and soft start logic judgment etc. and coordinate to control, lead to
The impedance for crossing control thyristor type impedance transformer changes the secondary coil impedance of magnetic control reactance converter to change its primary line
Impedance is enclosed, so as to realize that electric machine magnetic control reactor is depressured soft start.
（3）Dynamic reactive power compensation
Self-coupling voltage reducing and series connection magnet controlled reactor more than are depressured two stages, are made up of auto-transformer and magnet controlled reactor
Coupling branch road and LC in parallel compensation branch road composition dynamic reactive power compensation.In self-coupling voltage reducing and series connection magnet controlled reactor decompression
Whole start-up course in, controller is by the way that to starting current, the tester of the parameter of electric machine such as voltage calculates active power and work(
Rate factor, determines reactive power compensation amount.And then trigger signal is sent to magnet controlled reactor MCR2 IGCT T2, change magnetic control
Reactor MCR2 equivalent reactance value, then branch circuit parallel connection is compensated with LC, realize the dynamic compensation of soft start stage reactive power.
（4）Soft start terminates
Drop to rated current when detecting electric current, motor then disconnects contactor KM2, KM3, KM4, closed close to rated speed
Contactor KM1, by the integrated soft initiator short circuit of self coupling magnetic control reactive-load compensation, start-up course terminates.
Self-coupling voltage reducing current limliting subsystem and dynamic reactive power compensation subsystem are designed to couple to by circuit and magnetic circuit
Together, magnet controlled reactor MCR2 both constitutes auto-transformer, also plays the effect of the dynamic compensation of reactive power.
After soft start terminates, the integrated soft initiator of self-coupling voltage reducing compensation can also be connected on power network, to normal fortune
Motor and power network in row carry out reactive-load compensation, realize making full use of for device.
It should be appreciated that the part that this specification is not elaborated belongs to prior art.
Although describing the embodiment of the present invention above in association with accompanying drawing, those of ordinary skill in the art should
Understand, these are merely illustrative of, and various deformation or modification can be made to these embodiments, without departing from the original of the present invention
Reason and essence.The scope of the present invention is only limited by the claims that follow.
Claims (5)
1. the super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure, it is characterized in that, the controlling party
Method includes self-coupling voltage reducing current limliting subsystem reduced-voltage starting and dynamic reactive power compensation subsystem carries out dynamic reactive power compensation；
Self-coupling voltage reducing current limliting subsystem reduced-voltage starting includes auto-coupling voltage-reduction starting and series connection magnet controlled reactor reduced-voltage starting；Including following step
Suddenly：
Step 1, auto-coupling voltage-reduction starting；
In the starting stage of electric motor starting, then first closed high circuit breaker Q F closes contactor KM2, KM5, KM4, KM6；Make
The auto-transformer that the winding N1 and N2 that motor compensates integrated soft initiator by self-coupling voltage reducing are constituted is motor partial pressure, is realized
Auto-coupling voltage-reduction starting；
Step 2, series connection magnet controlled reactor reduced-voltage starting；
After auto-coupling voltage-reduction starting terminates, into the reduced-voltage starting of series connection magnet controlled reactor；Contactor KM5 is disconnected, contactor is closed
KM3 so that motor is connected with magnet controlled reactor MCR1；Motor is reduced by changing magnet controlled reactor MCR1 equivalent reactance value
Terminal voltage, realizes magnet controlled reactor reduced-voltage starting；
Step 3, dynamic reactive power compensation；
In two stages of magnet controlled reactor reduced-voltage starting of being connected described in auto-coupling voltage-reduction starting described in step 1 and step 2, by cutting
Changing-over tentaculum KM5 and KM3 so that the coupling branch road that auto-transformer and magnet controlled reactor are constituted and LC in parallel compensation branch roads are common
Soft start stage dynamic reactive power compensation is provided；
Step 4, soft start terminate；
Rated current is dropped to when detecting electric current, when motor is close to rated speed, then contactor KM2, KM3, KM4 is disconnected, closes
Splice grafting tentaculum KM1, makes the integrated soft initiator short circuit of self-coupling voltage reducing compensation, and soft start-up process terminates.
2. the super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure as claimed in claim 1, its
Be characterized in that the realization of auto-coupling voltage-reduction starting described in step 1 includes, IGCT T1 is not added with trigger signal, magnet controlled reactor MCR1 and
MCR2 connects, and constitutes auto-transformer, determines that self-coupling voltage reducing is opened according to the minimum starting current of motor and minimum detent torque
Dynamic no-load voltage ratio K=N1/N2, is the rated voltage that motor supplies 50%-70%, realizes auto-coupling voltage-reduction starting.
3. the super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure as claimed in claim 1, its
It is characterized in that the realization of magnet controlled reactor reduced-voltage starting described in step 2 includes voltage and current sensor by electric motor starting electric signal
Access controller, controller carries out soft start according to motor parameter, setting starting current value and relevant parameter and Booting sequence
Control algolithm is calculated and the coordination of soft start logic judgment is controlled, by controlling IGCT to change the secondary coil of magnet controlled reactor
Impedance changes its primary winding impedance, so as to realize magnet controlled reactor reduced-voltage starting.
4. the super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure as claimed in claim 1, its
It is characterized in that the realization of dynamic reactive power compensation described in step 3 is included in self-coupling voltage reducing and magnet controlled reactor reduced-voltage starting process
In, controller is by the way that to starting current, the measure of the parameter of electric machine such as voltage calculates active power and power factor, it is determined that nothing
Reactive power compensator amount；And then send trigger signal to IGCT T2, change magnet controlled reactor MCR2 equivalent reactance value, then with LC
Branch circuit parallel connection is compensated, so as to realize soft start stage dynamic reactive power compensation.
5. the super integrated soft start control method of high-capacity motor self-coupling voltage reducing compensation of high pressure as claimed in claim 1, its
It is characterized in, after soft start terminates, the integrated soft initiator access power network of self-coupling voltage reducing compensation, for normal operating electricity
The reactive-load compensation of machine and power network.
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| CN103346708A (en) * | 2013-07-08 | 2013-10-09 | 武汉理工大学 | Method for integrating grading variable frequency heavy-load soft starting and harmonic filtering of motor |
| CN103746612A (en) * | 2014-01-21 | 2014-04-23 | 武汉海奥电气有限公司 | Magnetic-valve controllable electric reactor phase-shifting self-coupling voltage-reduction soft starting method and device |
| CN104124905A (en) * | 2014-08-18 | 2014-10-29 | 武汉大学 | Self-coupling step-down compensation integrated soft start device |
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| JP2003309989A (en) * | 2002-04-16 | 2003-10-31 | Nishishiba Electric Co Ltd | Starter for motor and starting method therefor |
| CN201797473U (en) * | 2010-07-09 | 2011-04-13 | 武汉理工大学 | Reactive compensation soft start device based on variable reactance |
| CN202285382U (en) * | 2011-10-28 | 2012-06-27 | 武汉理工大学 | Self-coupling magnetic control reactance soft-starting device for super-power high-voltage motor |
| CN103023391A (en) * | 2012-12-13 | 2013-04-03 | 武汉理工大学 | Soft-starting current-limiting compensation and harmonic filtering integration method of high-voltage high-power motor |
| CN103346708A (en) * | 2013-07-08 | 2013-10-09 | 武汉理工大学 | Method for integrating grading variable frequency heavy-load soft starting and harmonic filtering of motor |
| CN103746612A (en) * | 2014-01-21 | 2014-04-23 | 武汉海奥电气有限公司 | Magnetic-valve controllable electric reactor phase-shifting self-coupling voltage-reduction soft starting method and device |
| CN104124905A (en) * | 2014-08-18 | 2014-10-29 | 武汉大学 | Self-coupling step-down compensation integrated soft start device |
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Application publication date: 20171020 |