CN107026590B - A kind of switching magnetic-resistance current transformer of wind-driven generator and its control method - Google Patents
A kind of switching magnetic-resistance current transformer of wind-driven generator and its control method Download PDFInfo
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- CN107026590B CN107026590B CN201710273136.3A CN201710273136A CN107026590B CN 107026590 B CN107026590 B CN 107026590B CN 201710273136 A CN201710273136 A CN 201710273136A CN 107026590 B CN107026590 B CN 107026590B
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- 230000005284 excitation Effects 0.000 claims abstract description 148
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 238000010248 power generation Methods 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims description 86
- 230000005611 electricity Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 4
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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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/36—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using armature-reaction-excited machines
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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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/102—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for limiting effects of transients
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Abstract
A kind of switching magnetic-resistance current transformer of wind-driven generator, by unsteady flow main circuit, export bus capacitor, isolated DC/DC converter, excitation and electric discharge main circuit composition, unsteady flow main circuit output connection output bus capacitor, input as isolated DC/DC converter simultaneously, isolated DC/DC converter output connection excitation and electric discharge main circuit input, excitation and electric discharge main circuit output connection unsteady flow main circuit input, unsteady flow main circuit output cathode end also connects the electric discharge input terminal of excitation and the main circuit that discharges, excitation and electric discharge main circuit output cathode end, unsteady flow main circuit output negative pole end, unsteady flow main circuit inputs positive terminal and is shorted；By three classes control model under different condition under the structure, realizes that wide generation range, high generating capacity, multi-angle flexibly control, be suitable for all kinds of wind power generation fields.
Description
Technical field
The present invention relates to wind power generation fields, and in particular to a kind of converter circuit topology of switching magnetic-resistance wind-driven generator
System and its control method.
Background technique
It is generated electricity using switch reluctance generator, is a kind of novel generation mode；Switch reluctance generator is used to adapt to
Electricity generation system under wind characteristic, there is no the case really commercially used both at home and abroad at present, and reason is switch reluctance generator
Exclusive structure and converter system is more special, is in research in recent years.
Wind-power electricity generation is sunshine industry, and current wind-driven generator mostly uses greatly permanent-magnet synchronous or double-fed asynchronous generator,
The former has shown a large amount of uses of disadvantage with high costs, especially rare earth permanent-magnetic material in recent years, and the latter needs rotor
Double winding, double convertor system；And switch reluctance generator structure is simple, sturdy and durable, low in cost, the strong reliability of fault-tolerance
Height, efficiency have broad application prospects also above double-fed asynchronous generator.
Wind-powered electricity generation industry, maximum power output ability are the key that higher effects in the industry in generating set operation control
Rate and benefit, bigger generating capacity power density, broader generation range are that the field especially needs.
Switch reluctance generator current transformer is the maincenter link of switch reluctance generator system operation and control, existing at present
Converter structure in, if respectively independent operating and the control of excitation and power generation two stages, for separate excitation type, if needed for excitation
Sending electric energy of the power supply from power generating stage is then self-excitation type, traditional self-excitation type be directly using generating voltage as excitation voltage,
Voltage and current fluctuation is big, although the fluctuation of separate excitation type voltage and current is small to need to provide special separate excitation power supply, increases maintenance
Workload.
Industry is there are also the self-excitation type switch reluctance generator converter system of decoupling type at present, and excitation voltage can also be with
It is separately adjustable, enhance the system in the adaptability in wind-powered electricity generation field, but flexibility is insufficient, for example field power supply break down or
Control is limited, and excitation voltage variation range is not wide, or relies solely on the variation of field power supply only to adjust winding excitation rank
Section voltage and current, lacks the multi-faceted intensive control ability of the fast reaction to system when necessary.
In addition, adapt to very low velocity, high wind speed, high revolving speed, it is extremely low in terms of, it is also desirable to new system energy
In view of these, thus can be improved entire electricity generation system can generator operation width, and then improve system power benefit and effect
Rate.
In the current numerous considerations of industry, a very big trend is the required switch so that current transformer becomes increasingly complex
More and more, the frequent switch motion of switching tube, especially PWM control etc. are managed, a large amount of switching loss is caused, is consumed big
Electric energy is measured, generating efficiency is reduced.
Summary of the invention
According to above background technique, the present invention just proposes that a kind of wide excitation voltage regulation range, both sides' formula regulate and control respectively
Raising excitation strengthen ability, Multi- Switch pipe but few switching frequency, special continuous current circuit promote power generating stage front winding electric current etc.
The converter system structure and its control method of aspect, improve the wide scope power generation section for adapting to wind characteristic and power generation is defeated
Output capacity, improves generating efficiency and benefit, and opposite then simplifies structure.
The technical solution of the present invention is as follows:
A kind of switching magnetic-resistance current transformer of wind-driven generator, by unsteady flow main circuit, output bus capacitor, isolated DC/DC
Converter, excitation and electric discharge main circuit composition, the unsteady flow main circuit export positive and negative both ends and connect the output bus capacitor
Positive and negative both ends, while the positive and negative both ends of input as the isolated DC/DC converter, isolated DC/DC converter output is just
Negative both ends connect the excitation and electric discharge main circuit inputs positive and negative both ends, and excitation exports positive and negative both ends with electric discharge main circuit and connect change
It flows main circuit and inputs positive and negative both ends, unsteady flow main circuit output cathode end also connects the electric discharge input terminal of excitation and the main circuit that discharges,
Excitation and electric discharge main circuit output cathode end, unsteady flow main circuit output negative pole end, unsteady flow main circuit input positive terminal are shorted；
The unsteady flow main circuit is made of three or four unsteady flow branch circuit parallel connections, connection switch magnetic inside each unsteady flow branch
A phase winding of generator is hindered, every phase winding contains double winding, and separates connection, and specifically, each unsteady flow branch routes the
A set of winding, second set of winding, first switch tube, second switch, third switching tube, the 4th switching tube, the 5th switching tube,
One diode composition, wherein first set winding one end, the first switch tube anode, the second switch tube cathode are short
It connects and inputs positive terminal as unsteady flow main circuit, first switch tube cathode connects the first diode cathode and second set described
Winding one end, the first set winding other end connects first diode anode and the third switchs tube anode, and second set of winding is another
One end connects third switch tube cathode, the 4th switch tube anode, second switch tube anode, the 5th switch tube anode,
4th switch tube cathode inputs negative pole end as unsteady flow main circuit, and the 5th switch tube cathode is as unsteady flow main circuit output cathode
End；
The isolated DC/DC converter includes electromagnetic isolation link, output DC voltage value and input direct-current voltage
It is worth equal；
The excitation and electric discharge main circuit are by the 6th switching tube, the 7th switching tube, the 8th switching tube, the second diode, the
Three diodes, the 4th diode, the first inductance, the second inductance, capacitor composition, wherein the 6th switch tube anode conduct
Excitation and electric discharge main circuit input positive terminal, the 6th switch tube cathode and second diode cathode, first inductance one
End connection, the first inductance other end are connect with the 7th switch tube anode, the third diode anode, third diode yin
Pole connect with the capacitor anode, second inductance one end and as excitation and electric discharge main circuit output cathode end, second
The inductance other end is connect with the 4th diode cathode, the 8th switch tube cathode, and the 8th switch tube anode is as excitation
Unsteady flow main circuit output cathode end, the second diode anode, the 7th switching tube yin are connect with the electric discharge input terminal of electric discharge main circuit
Pole, capacitor anode, the 4th diode anode are shorted and output and input negative pole end as excitation and electric discharge main circuit.
A kind of control method of switching magnetic-resistance current transformer of wind-driven generator, be divided into three classes operating mode:
First kind operating mode, when genset load becomes larger or starting and generating stage or maximal power tracing etc. suddenly
Reinforce unsteady flow main circuit input current when equal needs quickly reinforce excitation quickly to improve generating set power fan-out capability
When cut this mode, such operating mode is divided into two kinds again:
(1) according to switch reluctance generator rotor-position, connection needs the first switch of the unsteady flow branch of the phase winding of work
Pipe, third switching tube, the 4th switching tube closure, second switch, the 5th switching tube disconnect, and the 6th switching tube closure, the 8th opens
Pipe is closed to disconnect, the 7th switching tube by the work of PWM control mode, the size of duty ratio according to control system to the phase in work around
Current value demand in group is adjusted, and the above stage is the excitation stage of the phase winding of switch reluctance generator, according to generator
When rotor-position detection case reaches excitation stage end position, first switch tube, third switching tube, the 4th switching tube are disconnected,
5th switching tube closure at the end of according to generator rotor position to power generating stage, disconnects the 5th switch into power generating stage
Pipe, phase winding work terminate；
(2) in the above first kind operating mode (1), even if excitation and electric discharge under the conciliation of the 7th switching tube duty ratio
Phase winding electric current meets need at the end of the excitation stage that the accessible maximum output voltage of main circuit still cannot make generator
It asks, into this kind of operating mode: planting the excitation stage under operating mode with first kind operating mode (1) when the excitation stage starts and open
Each switching tube action mode is identical when the beginning, and when closing to an end in the excitation stage, 10% former excitation time detection winding is electric in advance
When stream cannot reach required exciting current 80%, first switch tube, third switching tube, the 4th switching tube, closure the are disconnected at this time
Two switching tubes, so that phase winding enters freewheeling period, thus the phase winding electric current fast lifting in no backward voltage, until
When starting up to power generating stage, disconnect second switch, be closed at the 5th switching tube, into first kind operating mode (1)
The identical power generating stage of kind of mode, if power generating stage start before phase winding electric current meet demand during freewheeling period, mention
Advance into power generating stage；
The 6th switching tube stays closed all the time state under such operating mode, and the 8th switching tube remains off-state,
Second switch is only just closed in freewheeling period, and first switch tube, third switching tube, the 4th switching tube are only in excitation rank
Duan Shicai closure, the 5th switching tube are only just closed in power generating stage；
Second class operating mode, the revolving speed and output power of wind power generating set are in ± 10% region of respective rated value
When in range:
First switch tube, second switch, third switching tube, the 8th switching tube are in an off state always, during work
There is no freewheeling period, excitation terminates to be directly entered power generating stage；According to generator rotor position testing result, certain unsteady flow branch is needed
When road is devoted oneself to work, the 4th switching tube of unsteady flow branch closure initially enters the excitation stage, and the of excitation and electric discharge main circuit
Six switching tubes, the 7th switching tube switch state adjusted according to following principle: according to required winding current situation, when needing excitation
When voltage, that is, excitation and electric discharge main circuit output voltage opposing busbars voltage, that is, unsteady flow main circuit output voltage reduce, the 7th switch
Pipe disconnects, and the 6th switching tube works according to PWM control mode, and specific duty ratio needs true according to required winding current closed-loop control
It is fixed；When needing excitation voltage opposing busbars voltage to increase i.e. raising winding current, the 6th switching tube closure, the 7th switching tube is pressed
According to PWM control mode work, specific duty ratio according to required winding current closed-loop control it needs to be determined that；It is opened when the excitation stage the 6th
It closes pipe to be closed always, when the 7th switching tube disconnects always, winding current is just in the mistake of meet demand value at the end of the excitation stage
In poor range, then controlled without PWM；
Third class operating mode, when the load of Wind turbines output end becomes smaller or generating set high-speed cruising bus electricity suddenly
Press through it is high when needing to reduce Wind turbines output power and reducing excitation voltage, under such operating mode:
First switch tube, second switch, third switching tube, the 7th switching tube are in disconnection always under such operating mode
State is closed according to the rotor-position pre-operation unsteady flow branch excitation stage come interim 4th switching tube, and the 6th switching tube uses PWM
Control mode changes the output excitation voltage of excitation and the main circuit that discharges by the adjusting of its duty ratio, according to rotor-position feelings
The 4th switching tube disconnects the 5th switching tube and is closed into power generating stage after the condition excitation stage, when the unsteady flow branch of rigid power cut-off
When the output bus capacitor both end voltage that road power generating stage exports power generation increases, or output bus electricity
Container both end voltage is when excess determines 5% or more busbar voltage, the duty of the 6th switching tube when the subsequent unsteady flow branch excitation stage
Become smaller than adjusting in proportion, during this period, the 8th switching tube closure puts output bus capacitor two sides electric energy to the second inductance
Electricity detects the 8th switching tube of disconnection when discharge loop electric current reaches limit value.
Technical effect of the invention mainly has:
(1) two ways realizes enhanced excitation, and stackable use accomplishes combination among the strong ones, i.e., enables first to open in the excitation stage
Guan Guan, third switching tube closure, the 6th switching tube closure, the 7th switching tube PWM control, then the 4th switching tube, which is closed into, encourages
When the magnetic stage, the every set winding of the phase winding of excitation all bears entire excitation voltage value at this time, opposite to enhance one times of excitation voltage,
And excitation and electric discharge main circuit then work in boost mode, i.e. output excitation voltage is greater than busbar voltage mode enhanced excitation, into
And improve the quick power generation fan-out capability of entire electricity generation system.
(2) in converter structure of the present invention second switch setting, before exciting current, that is, power generating stage starts mutually around
When group electric current cannot reach desirable value, closure second switch increases by a freewheeling period without back-pressure, can quickly mention in the short time
Winding current is risen, and then improves power generating stage starting winding current, to be conducive to improve electricity generation system power output capacity.
(3) structure of unsteady flow main circuit both can according to need selection enhanced excitation (i.e. first switch tube and third switch
Pipe is closed excitation) operating mode, can also selecting conventional excitation when low-load in high wind speed, (first switch tube and third are opened
Close pipe and disconnect excitation) mode, current transformer has been widened to the adaptability of external condition.
(4) under excitation structure of the invention and its control method, i.e. excitation and electric discharge main circuit and its control method, not only
The decoupling of power generation busbar voltage and excitation voltage is realized, and the adjustable range of excitation voltage is broad, can also keep excitation
Voltage stabilization is equal to busbar voltage.
(5) electric discharge link of the invention, loading that too small or wind-force is excessive or revolving speed is excessive etc. and do not need excessive electric energy
And in the excessive situation of current transformer energy storage, it can quickly discharge and give related safeguard measure, and the second inductance absorbs property
Afterwards, terminating a paragraph after turning off after the 8th switch tube discharge, the electric energy of the second inductance storage can be fed back to charge to capacitor, from
And be effectively utilized electric energy and can be used for the work in subsequent excitation stage, it does not waste, improves the returns and efficiency of entire electricity generation system.
(6) as it can be seen that unless in the case where relatively extreme, otherwise, near specified area from operating mode of the invention
When work, first switch tube, second switch, third switching tube are normally opened switch states, not Operating In Persistent Current Mode easily, then this is several
Switching loss, the on-state loss totality very little of a switching tube, also often there is off-state in rest switch pipe, and the overwhelming majority opens
Pipe work is closed in simple venation wave switching mode, so, although switching tube quantity needed for structure of the invention is more, therefore generate
Loss increase be not obvious.
Detailed description of the invention
Fig. 1 show switching magnetic-resistance current transformer of wind-driven generator circuit structure diagram of the invention.
In Fig. 1: 1, unsteady flow main circuit, 2, isolated DC/DC converter, 3, excitation and electric discharge main circuit.
Specific embodiment
A kind of switching magnetic-resistance current transformer of wind-driven generator, attached drawing 1 is converter circuit arrangement figure of the invention, by unsteady flow master
Circuit 1, output bus capacitor Cm, isolated DC/DC converter 2, excitation and electric discharge main circuit 3 form, and unsteady flow main circuit 1 is defeated
The positive and negative both ends connection output positive and negative both ends bus capacitor Cm out, while as the input of isolated DC/DC converter 2 positive and negative two
End, isolated DC/DC converter 2 exports positive and negative both ends connection excitation and electric discharge main circuit 3 inputs positive and negative both ends, excitation and electric discharge
Main circuit 3 exports positive and negative both ends connection unsteady flow main circuit 1 and inputs positive and negative both ends, and 1 output cathode end of unsteady flow main circuit, which also connects, encourages
The electric discharge input terminal of magnetic and electric discharge main circuit 3, excitation and electric discharge 3 output cathode end of main circuit, 1 output negative pole of unsteady flow main circuit
End, unsteady flow main circuit 1 input positive terminal and are shorted.
The switch reluctance generator of the present embodiment is the extremely double set coiled pipe types of four phases 8/6, and unsteady flow main circuit 1 is by four unsteady flows
Branch circuit parallel connection composition, a phase winding of connection switch reluctance generator inside each unsteady flow branch, every phase winding contain two sets around
Group, and connection is separated, specifically, each unsteady flow branch routes first set winding M1/N1/P1/Q1, second set of winding M2/N2/
P2/Q2, first switch tube V1/V6/V11/V16, second switch V2/V7/V12/V17, third switching tube V3/V8/V13/
V18, the 4th switching tube V4/V9/V14/V19, the 5th switching tube V5/V10/V15/V20, first diode D1/D2/D3/D4 group
At, wherein the one end first set winding M1/N1/P1/Q1, first switch tube V1/V6/V11/V16 anode, second switch V2/
V7/V12/V17 cathode is shorted and inputs positive terminal, the connection of first switch tube V1/V6/V11/V16 cathode as unsteady flow main circuit 1
First diode D1/D2/D3/D4 cathode and second set of one end winding M2/N2/P2/Q2, first set winding M1/N1/P1/Q1 are another
One end connects first diode D1/D2/D3/D4 anode and third switching tube V3/V8/V13/V18 anode, second set of winding M2/
The N2/P2/Q2 other end connects third switching tube V3/V8/V13/V18 cathode, the 4th switching tube V4/V9/V14/V19 anode, the
Two switching tube V2/V7/V12/V17 anodes, the 5th switching tube V5/V10/V15/V20 anode, the 4th switching tube V4/V9/V14/
V19 cathode inputs negative pole end as unsteady flow main circuit 1, and the 5th switching tube V5/V10/V15/V20 cathode is as unsteady flow main circuit 1
Output cathode end.
Isolated DC/DC converter 2 includes electromagnetic isolation link, exports DC voltage value and input direct-current voltage value phase
Deng playing electromagnetic isolation and to input and output both ends filter function.
Excitation and electric discharge main circuit 3 are by the 6th switching tube V21, the 7th switching tube V22, the 8th switching tube V23, the two or two pole
Pipe D5, third diode D6, the 4th diode D7, the first inductance L1, the second inductance L2, capacitor C composition, wherein the 6th opens
Pipe V21 anode is closed as excitation and electric discharge main circuit 3 and inputs positive terminal, the 6th switching tube V21 cathode and the second diode D5 yin
Pole, the connection of first one end inductance L1, the first inductance L1 other end and the 7th switching tube V22 anode, third diode D6 anode connect
It connects, third diode D6 cathode connect and defeated as excitation and the main circuit 3 that discharges with capacitor C anode, second one end inductance L2
Positive terminal out, the second inductance L2 other end are connect with the 4th diode D7 cathode, the 8th switching tube V23 cathode, the 8th switching tube
V23 anode connect 1 output cathode end of unsteady flow main circuit, the second diode with the electric discharge input terminal of electric discharge main circuit 3 as excitation
D5 anode, the 7th switching tube V22 cathode, capacitor C cathode, the 4th diode D7 anode are shorted and as excitations and the main electricity that discharges
Road 3 outputs and inputs negative pole end.
According to the converter structure and its control system of the present embodiment, control method is divided into three classes operating mode, according to control
Demand selection of the system processed under different loads and different operating conditions.
First kind operating mode is become larger suddenly or starting and generating stage or maximal power tracing in genset load
Etc. need quickly reinforce excitation when quickly reinforce unsteady flow main circuit input current so as to improve generating set power export energy
It is cut when power, such operating mode is specifically divided into two kinds again:
(1) according to switch reluctance generator rotor-position, it is assumed that M phase winding has operating condition, then control first first
Switching tube V1, third switching tube V3, the 4th switching tube V4 closure, second switch V2, the 5th switching tube V5 are disconnected, the 6th switch
Pipe V21 closure, the 8th switching tube V23 are disconnected, the 7th switching tube V22 by the work of PWM control mode, the size of duty ratio according to
Current value demand in M phase winding is adjusted, the above stage is the excitation stage of the phase winding of switch reluctance generator, herein
Stage, the first inductance L1 was electrically charged while capacitor C when the 7th switching tube V22 is closed since the 6th switching tube V21 is closed always
To M phase winding provide excitation voltage, and the 7th switching tube V22 turn off when be then the first inductance L1 and capacitor C jointly to M phase around
Group provides excitation voltage, plays the effect of enhancing excitation；In addition, being encouraged after the closure of first switch tube V1 and third switching tube V3
Magnetic, the then excitation voltage that M1 and M2 every suit winding is born are respectively equal to the output voltage of excitation and the main circuit 3 that discharges, if the
The excitation of one switching tube V1 and third switching tube V3 off-state, then M1 and M2 every set winding both ends excitation voltage only have excitation with
Discharge main circuit 3 output voltage values half, thus under the unsteady flow branch excitation stage of the mode winding voltage increase one
Times；
When reaching excitation stage end position according to generator rotor position detection case, first switch tube V1, third
Switching tube V3, the 4th switching tube V4 are disconnected, the 5th switching tube V5 closure, into power generating stage, to according to generator rotor position
At the end of power generating stage, the 5th switching tube V5 is disconnected, M phase winding work terminates.
(2) in the above first kind operating mode (1), though the 7th switching tube V22 duty ratio conciliation under excitation with
Phase winding electric current is full at the end of the excitation stage that the electric discharge accessible maximum output voltage of main circuit 3 still cannot make generator
Next sufficient demand enters this kind of operating mode into the subsequent phase winding of working condition, it is assumed that the unsteady flow branch where N phase winding
Road: each switching tube action when starting when the excitation stage starts with the excitation stage under first kind operating mode (1) kind operating mode
Mode is identical, and when closing to an end in the excitation stage, 10% former excitation time detection winding electric current is encouraged needed for cannot reaching in advance
When magnetoelectricity stream 80%, first switch tube V6, third switching tube V8, the 4th switching tube V9 are disconnected at this time, are closed second switch V7,
So that phase winding enters freewheeling period, the N phase winding current loop is N1-D2-N2-V7-N1 at this time, thus N phase winding does not have
External backward voltage (busbar voltage can give winding backward voltage when power generating stage), then the circuit winding current faster obtains
It must increase, when starting wait reach power generating stage, disconnect second switch V7, be closed at the 5th switching tube V10, into first
Class operating mode (1) plants the identical power generating stage of mode, if power generating stage starts phase winding electric current during preceding freewheeling period
Meet demand then enters power generating stage in advance.
The 6th switching tube V21 stays closed all the time state under such operating mode, and the 8th switching tube V23 remains disconnection
State, second switch V2/V7/V12/V17 are only just closed in freewheeling period, first switch tube V1/V6/V11/V16, the
Three switching tube V3/V8/V13/V18, the 4th switching tube V4/V9/V14/V19 are only just closed at the excitation stage, the 5th switch
Pipe V5/V10/V15/V20 is only just closed in power generating stage.
Second class operating mode, the revolving speed and output power of wind power generating set are in ± 10% region of respective rated value
When in range:
When assuming that M phase winding need to enter working condition according to rotor-position, the first switch tube V1 of unsteady flow branch, second
Switching tube V2, third switching tube V3, the 8th switching tube V23 are in an off state always, do not have freewheeling period, excitation during work
End is directly entered power generating stage；The 4th switching tube V4 closure initially enters excitation stage, the 6th switching tube when excitation starts
V21, the 7th switching tube V22 switch state adjusted according to following principle: according to required winding current situation, when needing excitation electric
When pressure is excitation and electric discharge 3 output voltage opposing busbars voltage of main circuit, that is, unsteady flow main circuit output voltage reduction, the 7th switch
Pipe V22 is disconnected, and the 6th switching tube V21 works according to PWM control mode, and excitation voltage is lower than busbar voltage, specific excitation at this time
The voltage i.e. duty ratio of the 6th switching tube V21 needs to adjust according to required winding current closed-loop control；When needing excitation voltage phase
When improving winding current to busbar voltage increase, the 6th switching tube V21 closure, the 7th switching tube V22 is according to PWM control mode
It works, excitation voltage will be greater than busbar voltage under this operating condition, and specific duty ratio needs to adjust according to required winding current closed-loop control
Section；When the 6th switching tube V21 of excitation stage is closed always, when the 7th switching tube V22 is disconnected always, winding at the end of the excitation stage
Electric current just in the error range of meet demand value, is then controlled without any PWM mode.
Third class operating mode, when the load of Wind turbines output end becomes smaller or generating set high-speed cruising bus electricity suddenly
Press through it is high when needing to reduce Wind turbines output power and reducing excitation voltage, under such operating mode:
First switch tube V1/V6/V11/V16, second switch V2/V7/V12/V17, third are opened under such operating mode
Pass pipe V3/V8/V13/V18, the 7th switching tube V22 are in an off state always, and the unsteady flow of M phase winding is assumed according to rotor-position
Branch excitation stage interim 4th switching tube V4 closure, the 6th switching tube V21 use PWM control mode, at this time excitation voltage
Busbar voltage will be less than, changed especially by the adjusting of its duty ratio, the smaller then duty ratio of demand to excitation voltage is smaller, root
The 4th switching tube V4 disconnects the 5th switching tube V5 and is closed into power generating stage after according to the rotor-position situation excitation stage, works as hair
When the output bus capacitor Cm both end voltage for exporting power generation increases, or output bus capacitor
Device Cm both end voltage is when excess determines 5% or more busbar voltage, when for example N phase winding unsteady flow branch excitation stage of follow-up work
The duty ratio of 6th switching tube V21 is adjusted in proportion to become smaller, and during this period, the 8th switching tube V23 closure will export bus capacitor
Device Cm two sides electric energy discharges to the second inductance L2, and busbar voltage reduces, and detects and breaks again when discharge loop electric current reaches limit value
Open the 8th switching tube V23.
Claims (1)
1. a kind of control method of switching magnetic-resistance current transformer of wind-driven generator, current transformer is by unsteady flow main circuit, output bus electricity
Container, isolated DC/DC converter, excitation and electric discharge main circuit composition, which is characterized in that the unsteady flow main circuit output is positive and negative
Both ends connect the positive and negative both ends of the output bus capacitor, while the input positive and negative two as the isolated DC/DC converter
End, isolated DC/DC converter export that positive and negative both ends connect the excitation and electric discharge main circuit inputs positive and negative both ends, excitation with put
Electric main circuit exports positive and negative both ends connection unsteady flow main circuit and inputs positive and negative both ends, and unsteady flow main circuit output cathode end also connects excitation
With the electric discharge input terminal of electric discharge main circuit, excitation and electric discharge main circuit output cathode end, unsteady flow main circuit output negative pole end, unsteady flow
Main circuit inputs positive terminal and is shorted；
The unsteady flow main circuit is made of three or four unsteady flow branch circuit parallel connections, connection switch magnetic resistance hair inside each unsteady flow branch
One phase winding of motor, every phase winding contain double winding, and separate connection, and specifically, each unsteady flow branch routes first set
Winding, second set of winding, first switch tube, second switch, third switching tube, the 4th switching tube, the 5th switching tube, the one or two
Pole pipe composition, wherein first set winding one end, the first switch tube anode, the second switch tube cathode are shorted simultaneously
Positive terminal is inputted as unsteady flow main circuit, first switch tube cathode connects the first diode cathode and second set of winding
One end, the first set winding other end connects first diode anode and the third switchs tube anode, second set of winding other end
Connection third switch tube cathode, the 4th switch tube anode, second switch tube anode, the 5th switch tube anode, the 4th
Tube cathode is switched as unsteady flow main circuit and inputs negative pole end, the 5th switch tube cathode is as unsteady flow main circuit output cathode end；
The isolated DC/DC converter includes electromagnetic isolation link, exports DC voltage value and input direct-current voltage value phase
Deng；
The excitation and electric discharge main circuit are by the 6th switching tube, the 7th switching tube, the 8th switching tube, the second diode, the three or two
Pole pipe, the 4th diode, the first inductance, the second inductance, capacitor composition, wherein the 6th switch tube anode is as excitation
Positive terminal is inputted with electric discharge main circuit, the 6th switch tube cathode and second diode cathode, first inductance one end connect
Connect, the first inductance other end connect with the 7th switch tube anode, the third diode anode, third diode cathode and
The capacitor anode, second inductance one end connect and as excitation and electric discharge main circuit output cathode end, the second inductance
The other end and the 4th diode cathode, the 8th switch tube cathode connects, the 8th switch tube anode as excitation with put
The electric discharge input terminal of electric main circuit connects unsteady flow main circuit output cathode end, the second diode anode, the 7th switch tube cathode, electricity
Container cathode, the 4th diode anode are shorted and output and input negative pole end as excitation and electric discharge main circuit；
The control method of switching magnetic-resistance current transformer of wind-driven generator, be divided into three classes operating mode, it is characterised in that:
First kind operating mode, when genset load become larger suddenly or starting and generating stage or maximal power tracing need it is fast
Quickly reinforce unsteady flow main circuit input current when speed reinforces excitation and cuts this when generating set power fan-out capability to improve
Mode, such operating mode are divided into two kinds again:
(1) according to switch reluctance generator rotor-position, connection needs the first switch tube of the unsteady flow branch of the phase winding of work, the
Three switching tubes, the 4th switching tube closure, second switch, the 5th switching tube disconnect, the 6th switching tube closure, and the 8th switching tube is disconnected
It opens, the 7th switching tube works by PWM control mode, and the size of duty ratio is according to control system in the phase winding in work
Current value demand is adjusted, and the above stage is the excitation stage of the phase winding of switch reluctance generator, according to generator amature position
When setting detection case arrival excitation stage end position, first switch tube, third switching tube, the 4th switching tube are disconnected, and the 5th opens
Pipe closure is closed, into power generating stage, at the end of according to generator rotor position to power generating stage, disconnects the 5th switching tube, it should
Phase winding work terminates；
(2) in the above first kind operating mode (1), even if the excitation under the conciliation of the 7th switching tube duty ratio and the main electricity that discharges
Phase winding electric current meet demand at the end of the excitation stage that the accessible maximum output voltage in road still cannot make generator, into
Enter this kind of operating mode: when starting when the excitation stage starts with the excitation stage under first kind operating mode (1) kind operating mode
Each switching tube action mode is identical, and when closing to an end in the excitation stage, 10% former excitation time detection winding electric current is not in advance
When can reach required exciting current 80%, first switch tube, third switching tube, the 4th switching tube are disconnected at this time, and closure second is opened
Guan Guan, so that phase winding enters freewheeling period, thus the phase winding electric current fast lifting in no backward voltage, wait reach hair
When the electric stage starts, second switch is disconnected, the 5th switching tube is closed at, plants mould into first kind operating mode (1)
The identical power generating stage of formula, if power generating stage start before phase winding electric current meet demand during freewheeling period, in advance into
Enter power generating stage；
The 6th switching tube stays closed all the time state under such operating mode, and the 8th switching tube remains off-state, and second
Switching tube is only just closed in freewheeling period, and first switch tube, third switching tube, the 4th switching tube are only at the excitation stage
It is just closed, the 5th switching tube is only just closed in power generating stage；
Second class operating mode, the revolving speed and output power of wind power generating set are in ± 10% regional scope of respective rated value
When interior:
First switch tube, second switch, third switching tube, the 8th switching tube are in an off state always, are not had during work
Freewheeling period, excitation terminate to be directly entered power generating stage；According to generator rotor position testing result, certain unsteady flow branch is needed to throw
When entering work, the 4th switching tube closure of the unsteady flow branch initially enters the excitation stage, and excitation is opened with the 6th of electric discharge main circuit
Guan Guan, the 7th switching tube switch state adjusted according to following principle: according to required winding current situation, when needing excitation voltage
When i.e. excitation and electric discharge main circuit output voltage opposing busbars voltage, that is, unsteady flow main circuit output voltage reduce, the 7th switching tube is disconnected
Open, the 6th switching tube according to PWM control mode work, specific duty ratio according to required winding current closed-loop control it needs to be determined that；
When need excitation voltage opposing busbars voltage increase i.e. improve winding current when, the 6th switching tube be closed, the 7th switching tube according to
PWM control mode work, specific duty ratio according to required winding current closed-loop control it needs to be determined that；It is switched when the excitation stage the 6th
Pipe is closed always, and when the 7th switching tube disconnects always, winding current is just in the error of meet demand value at the end of the excitation stage
In range, then controlled without PWM；
Third class operating mode, when the load of Wind turbines output end becomes smaller or generating set high-speed cruising busbar voltage mistake suddenly
When height needs to reduce Wind turbines output power and reduces excitation voltage, under such operating mode:
First switch tube, second switch, third switching tube, the 7th switching tube are in disconnection shape always under such operating mode
State is closed according to the rotor-position pre-operation unsteady flow branch excitation stage come interim 4th switching tube, and the 6th switching tube is controlled using PWM
Mode processed changes the output excitation voltage of excitation and the main circuit that discharges by the adjusting of its duty ratio, according to rotor-position situation
The 4th switching tube disconnects the 5th switching tube and is closed into power generating stage after the excitation stage, when the unsteady flow branch of rigid power cut-off
When the output bus capacitor both end voltage that power generating stage exports power generation increases, or output bus capacitor
Device both end voltage is when excess determines 5% or more busbar voltage, the duty ratio of the 6th switching tube when the subsequent unsteady flow branch excitation stage
Adjust and become smaller in proportion, during this period, the 8th switching tube closure will output bus capacitor two sides electric energy to the second inductive discharge,
It detects and disconnects the 8th switch when discharge loop electric current reaches limit value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108448974B (en) * | 2018-03-21 | 2019-07-30 | 中国计量大学 | A kind of switching magnetic-resistance wind-driven generator high pressure converter system |
| CN108448970B (en) * | 2018-03-21 | 2020-06-02 | 中国计量大学 | High-voltage direct-current unit converter system of switched reluctance generator |
| CN110071668B (en) * | 2019-04-08 | 2020-09-11 | 中国计量大学 | High-speed switch reluctance generator current transformation system |
| CN110011580B (en) * | 2019-04-08 | 2020-09-11 | 中国计量大学 | Switched reluctance generator current transformation system |
| CN109921704B (en) * | 2019-04-08 | 2020-09-11 | 中国计量大学 | Switch reluctance generator converter and control method thereof |
| CN109995284B (en) * | 2019-04-08 | 2020-09-11 | 中国计量大学 | Self-charging switched reluctance generator current transformation system |
| CN110165966A (en) * | 2019-05-31 | 2019-08-23 | 南京信息职业技术学院 | A kind of power converter of switch reluctance motor and its control method |
| CN110212827B (en) * | 2019-06-12 | 2021-02-12 | 中国计量大学 | Converter system of switched reluctance generator |
| CN110212826B (en) * | 2019-06-12 | 2021-02-12 | 中国计量大学 | Converter system of direct-boost double-fed switched reluctance generator |
| CN113890433B (en) * | 2021-09-28 | 2022-06-14 | 南京航空航天大学 | Electro-magnetic doubly salient motor capable of ensuring fault-tolerant power generation power by improving bus voltage |
| CN113889998B (en) * | 2021-10-15 | 2023-09-22 | 中国计量大学 | DC wind power plant switch reluctance motor conversion system and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289107A (en) * | 1992-03-30 | 1994-02-22 | General Electric Company | Switched reluctance generator system with fault recovery capability |
| US6011377A (en) * | 1994-03-01 | 2000-01-04 | Hamilton Sundstrand Corporation | Switched reluctance starter/generator system and method of controlling same |
| CN1380740A (en) * | 2002-05-22 | 2002-11-20 | 南京航空航天大学 | Switch reluctance generator whose main circuit is series-parallel structure |
| CN104660129A (en) * | 2015-03-19 | 2015-05-27 | 中国计量学院 | Switch reluctance wind driven generator control system and method |
| CN205883097U (en) * | 2016-06-24 | 2017-01-11 | 姜坚波 | Encourage switched reluctance generator transformer soon and press power converter |
-
2017
- 2017-04-20 CN CN201710273136.3A patent/CN107026590B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289107A (en) * | 1992-03-30 | 1994-02-22 | General Electric Company | Switched reluctance generator system with fault recovery capability |
| US6011377A (en) * | 1994-03-01 | 2000-01-04 | Hamilton Sundstrand Corporation | Switched reluctance starter/generator system and method of controlling same |
| CN1380740A (en) * | 2002-05-22 | 2002-11-20 | 南京航空航天大学 | Switch reluctance generator whose main circuit is series-parallel structure |
| CN104660129A (en) * | 2015-03-19 | 2015-05-27 | 中国计量学院 | Switch reluctance wind driven generator control system and method |
| CN205883097U (en) * | 2016-06-24 | 2017-01-11 | 姜坚波 | Encourage switched reluctance generator transformer soon and press power converter |
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