CN104617582B - Photo-thermal combined grid power generation on-load voltage regulation control method - Google Patents
Photo-thermal combined grid power generation on-load voltage regulation control method Download PDFInfo
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Abstract
The invention discloses a photo-thermal combined grid power generation on-load voltage regulation control method; the method comprises the following steps: controlling a boost of a power plant boost transformer by switching a breakover direction of a thyristor in a boost control circuit of the power plant boost transformer; controlling a voltage reduction of the power plant boost transformer by switching a breakover direction of a thyristor in a voltage reduction control circuit in the power plant boost transformer; controlling a boost of a load side voltage reduction transformer by switching a breakover direction of the thyristor in a boost control circuit in the load side voltage reduction transformer; controlling a voltage reduction of the load side voltage reduction transformer by switching a breakover direction of a thyristor in a voltage reduction control circuit in the load side voltage reduction transformer. When the transformers are running with load, no transient state process is generated in switching the thyristor switches under continuous requirements without interrupting the electric current; the electric current gets into the stable state quickly; no interstage short circuit is generated; not interstage overvoltage is generated; the electric current changes continuously without causing problem of interrupting the power supply of the lines.
Description
Technical field
The present invention relates to power system debugging field, more particularly, to a kind of photo-thermal generates electricity by way of merging two or more grid systems on-load voltage regulation control method.
Background technology
The ultimate principle of transformer on-load voltage regulating is to draw some taps from the coil of transformator side, by having
On-load shunting switch, in the case of not cutting off load current, by a tap-change operation to another tap, to convert effective circle
Number, reaches the purpose adjusting voltage., using mechanical type voltage-regulation tap changer, there is many and ask in traditional ULTC
Topic, such as produces electric arc, and speed of action is slow, safeguards inconvenience, fault rate height etc..
Traditional transformer on-load voltage regulating device adopts mechanical type load ratio bridging switch, accident and fault rate high, and on having
The trend rising.Because the movement time of mechanical switch is long, generally 5s, therefore, traditional ULTC is simply possible to use in
The voltage-regulation of stable state.
In prior art, mechanical type modified model ULTC is on the basis of traditional plus an electronic cutting is powered-down
Road conversion forms, and IGBT group leans on the operation of mechanical switch to complete；But the rated capacity of IGCT is less demanding, response speed
Degree is slow.
Transformer on-load voltage regulating is an important adjusting pressure measure in power system, widely used in power system.
And photo-thermal is generated electricity by way of merging two or more grid systems when needing to carry out on-load voltage regulation, if using the mechanical switch of traditional ULTC,
Produce the shortcomings such as electric arc and fault rate height when then there is complex structure, switching, significantly impact ULTC and exist
Function in system.
Content of the invention
The present invention, in order to adapt to continually switch so that limiting voltage is within certain limit between tap, eliminates in the past
Produced electric arc during the switching of mechanical contact formula ULTC, the present invention uses IGCT to assist on-load voltage regulation technology,
Mechanical contact is used in combination with IGCT it is proposed that a kind of IGCT omitting auxiliary transformer assists the photo-thermal of shunting switch
Generate electricity by way of merging two or more grid systems on-load voltage regulation control method.
Technical solution of the present invention is as follows:
A kind of photo-thermal generates electricity by way of merging two or more grid systems on-load voltage regulation control method, including,
(1) boosting rectifier control of power plant booster transformer: by switching the boost control circuit of power plant booster transformer
In turn on thyristors direction controlling power plant booster transformer boosting；
(2) blood pressure lowering of power plant booster transformer controls: by switching the voltage reduction circuit of power plant booster transformer
In turn on thyristors direction controlling power plant booster transformer blood pressure lowering；
(3) boost process of load side step-down transformer: by the boost control circuit of switchable load side step-down transformer
In turn on thyristors direction controlling load side step-down transformer boosting；
(4) pressure reduction of load side step-down transformer: by the voltage reduction circuit of switchable load side step-down transformer
In turn on thyristors direction controlling load side step-down transformer blood pressure lowering.
The boost control circuit of power plant booster transformer includes: relay brk11, relay brk12, relay
Brk13, resistance r11, resistance r12, solid-state switch d11, the second solid-state switch d12 and inductance l；
Solid-state switch d11 passes through IGCT dalay11, IGCT dalay12 inverse parallel composition；Solid-state switch d12 passes through
IGCT dalay13, IGCT dalay14 inverse parallel composition；
IGCT dalay13, IGCT dalay14 inverse parallel connect, the anode of IGCT dalay13 and negative electrode respectively with
The negative electrode of IGCT dalay14 is connected with anode；The anode of IGCT dalay11 and negative electrode respectively with IGCT dalay12
Negative electrode be connected with anode；Relay brk13, the anode of IGCT dalay11, the negative electrode of IGCT dalay12 are all connected with
One end of the second subprime of the Secondary Winding of power plant booster transformer, relay brk12, the anode of IGCT dalay13, crystalline substance
The negative electrode of brake tube dalay14 is all connected with the other end of the second subprime of the Secondary Winding of power plant booster transformer；Relay
Brk11 is connected one end of first level of Secondary Winding of power plant booster transformer with resistance r11 after connecting；Power plant boosts
The other end ground connection of first level of the Secondary Winding of transformator；The negative electrode of IGCT dalay11, the moon of IGCT dalay13
Pole meets, with the sky of relay brk11, relay brk12, relay brk13, company of connecting after end is connected with resistance r12, inductance l
Connect and be grounded.
The boost process of power plant booster transformer specifically includes following steps:
(1) original state: relay brk11, relay brk12 closure, relay brk13 disconnect；Brk12=0,
Brk11=0, brk13=1, i.e. relay brk12 and relay brk11 closure conducting, brk13 off-state.IGCT dalay11,
IGCT dalay12, IGCT dalay13, IGCT dalay14 are 0, do not trigger, IGCT dalay11, IGCT
Dalay12, IGCT dalay13, IGCT dalay14 are not turned on, and electric current circulates through relay brk1；
(2) in starting point positive period of current cycle, relay brk12 disconnects, brk12=1, and now electric current is through relay
Brk11 circulates, and due to the partial pressure effect on resistance r11, there is positive voltage at IGCT dalay13, IGCT dalay14 two ends；
(3) after time delay, to IGCT dalay13, IGCT dalay14 trigger, IGCT dalay13,
IGCT dalay14 turns on, by relay brk11 short circuit, after a power network current cycle (0.02 second), relay brk11
Disconnect, brk11=1, i.e. brk open circuit, now only IGCT dalay13, IGCT dalay14 conducting, connect bus and change
Depressor；
After (4) IGCT dalay13, IGCT dalay14 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), detect auxiliary switch branch current ia2 sense of current；
(5) when it is positive for auxiliary switch branch current ia2 electric current is detected, to relay brk11 trigger, simultaneously
Stop to IGCT dalay13, IGCT dalay14 trigger.Secondary Winding due to now power plant booster transformer
Second subprime the port of export be more than transformator first level of Secondary Winding outlet voltage, IGCT dalay11 holds
Turned on by the forward voltage of second subprime, IGCT dalay13, IGCT dalay14 bear the backward voltage of second subprime
And end.
(6) after IGCT dalay11 conducting, to IGCT dalay12 trigger, IGCT dalay11,
(0.06 second, be mainly in view of the time delay of the actuating of relay), relay after dalay12 turns on three cycles in turn
Brk13 closes, and stops to IGCT dalay11, IGCT dalay12 trigger, the so far liter of power plant booster transformer
Pressure handoff procedure all terminates.
The voltage reduction circuit of power plant booster transformer, including relay brk21, relay brk22, relay
Brk23, resistance r21, resistance r22, solid-state switch d21, IGCT dalay23, IGCT dalay24, IGCT dalay25 and
Inductance l2；Solid-state switch d21 includes IGCT dalay21, IGCT dalay22；
The anode of IGCT dalay21 is connected with the negative electrode of IGCT dalay22 and anode respectively with negative electrode；IGCT
The negative electrode of dalay24 connects the anode of IGCT dalay25, and the negative electrode of IGCT dalay25 connects the sun of IGCT dalay23
Pole, the negative electrode of IGCT dalay23 connects the anode of IGCT dalay24；Relay brk21 is connected with resistance r21, relay
Brk22, resistance r21, the anode of IGCT dalay21, the negative electrode of IGCT dalay22 all with power plant booster transformer two
One end of the second subprime of secondary winding is connected, the other end of the second subprime of the Secondary Winding of power plant booster transformer with continue
Electrical equipment brk23, the anode of IGCT dalay23, the negative electrode of IGCT dalay25 are connected, meanwhile, relay brk23, brilliant lock
The anode of pipe dalay23, the negative electrode of IGCT dalay25 be connected power plant booster transformer Secondary Winding first level
One end；The other end ground connection of first level of the Secondary Winding of power plant booster transformer；The negative electrode of IGCT dalay21,
The negative electrode of IGCT dalay23 and relay brk21, relay brk22, the sky of relay brk23 connect after end is connected with electricity
Resistance r22, inductance l2 connect and are grounded.
The blood pressure lowering of power plant booster transformer controls, and specifically includes:
(1) original state: relay brk21, relay brk22 closure, relay brk23 disconnects, brk21=0,
Brk22=0, brk23=1, i.e. relay brk21 and brk22 closure conducting, brk23 off-state.Signal d1, delay and delay2
It is all 0, do not trigger, IGCT dalay21, IGCT dalay22 IGCT d1, IGCT dalay23, IGCT
Dalay24, IGCT dalay25 are not turned on, and electric current circulates through relay brk22；
(2) in starting point positive period of current cycle, relay brk22=1, relay brk22 disconnect, now electric current
Through relay brk21 circulation, due to the effect of ohmically partial pressure, there is positive electricity at IGCT dalay21, IGCT dalay22 two ends
Pressure；
(3) after time delay, to IGCT dalay21, IGCT dalay22 trigger, IGCT dalay21,
IGCT dalay22 turns on, by relay brk21 short circuit, and after a power network current cycle (0.02 second), relay
Brk21=1, that is, relay brk21 open circuit, now only IGCT dalay21, IGCT dalay22 conducting, connect bus with
Transformator；
After (4) IGCT dalay21, IGCT dalay22 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), the direction of detection auxiliary switch branch current ia2；
(5) it is positive and the Secondary Winding of power plant booster transformer when auxiliary switch branch current ia2 electric current is detected
The output voltage ea of second subprime voltage be timing (this measurement is easily achieved in engineering), to IGCT
Delay23 trigger.Generate electricity because the port of export of the now second subprime of the Secondary Winding of power plant booster transformer is more than
The outlet voltage of first level of the Secondary Winding of factory's booster transformer, IGCT delay23 bears power plant boosting transformation
The backward voltage of the second subprime of the Secondary Winding of device, is not turned on；
(6) when auxiliary switch branch current ia2 is kept to 0, IGCT dalay21, IGCT dalay22 are not triggering
Cut-off in the case of signal and maintenance electric current turns off, and then so that the tap of No. 2 coils and bus is disconnected.And load side at the moment
Electric current is 0, and potential is also that the tap potential of 0, No. 2 coils is more than zero, and IGCT delay23 bears No. 2 transformators and the earth
Between forward voltage and turn on, then, be the switching realizing tap in the case of zero in electric current, no-voltage overshoots；
(7) after IGCT delay23 conducting, to IGCT delay24, IGCT delay25 trigger, IGCT
After delay24, IGCT delay25 turn on three cycles in turn (0.06 second, be mainly in view of the actuating of relay delay when
Between), relay brk23 closes, and stops to IGCT delay23 and IGCT delay24, IGCT delay25 trigger,
So far the blood pressure lowering handoff procedure of power plant booster transformer all terminates.
The boosting rectifier control of load side step-down transformer, specifically includes: includes relay brk31, relay brk32, relay
Device brk33, resistance r31, resistance r32, IGCT dalay31, IGCT dalay32, IGCT dalay33, IGCT
Dalay34, IGCT dalay35 and power supply；
The anode of IGCT dalay31 is connected with the negative electrode of IGCT dalay32 and anode respectively with negative electrode；IGCT
The negative electrode of dalay34 connects the anode of IGCT dalay35, and the negative electrode of IGCT dalay35 connects the sun of IGCT dalay33
Pole, the negative electrode of IGCT dalay33 connect IGCT dalay34 anode；Relay brk31 is connected with resistance r31, relay
Device brk32, resistance r31, the anode of IGCT dalay31, IGCT dalay32 negative electrode all with power plant booster transformer
One end of the second subprime of Secondary Winding is connected, the other end of the second subprime of the Secondary Winding of power plant booster transformer with
Relay brk33, the anode of IGCT dalay33, the negative electrode of IGCT dalay35 are connected, meanwhile, relay brk33, crystalline substance
The anode of brake tube dalay33, the negative electrode of IGCT dalay35 be connected power plant booster transformer Secondary Winding first time
One end of level；The other end ground connection of first level of the Secondary Winding of power plant booster transformer；The moon of IGCT dalay31
Pole, the negative electrode of IGCT dalay33 and relay brk31, relay brk32, the sky of relay brk33 connect after end is connected with
Resistance r32, power sources in series are simultaneously grounded.
The boosting rectifier control of load side step-down transformer, specifically includes following steps:
(1) original state: relay brk31, relay brk32 closure conducting, relay brk33 disconnects, brk31=0,
Brk32=0, brk33=1, i.e. relay brk31 and brk32 closure conducting, relay brk33 off-state.IGCT dalay31,
IGCT dalay32, IGCT dalay33, IGCT dalay34, IGCT dalay35 are 0, do not trigger, IGCT
Dalay31, IGCT dalay32, IGCT dalay33, IGCT dalay34, IGCT dalay35 are not turned on, electric current
Through relay brk32 circulation；
(2) in starting point positive period of current cycle, relay brk32 disconnects, relay brk32=1, disconnects, now
Electric current circulates through relay brk31, due to the partial pressure effect on resistance r31, IGCT dalay31, IGCT dalay32 two ends
There is positive voltage；
(3) after time delay, to IGCT dalay31, IGCT dalay32 trigger, IGCT dalay31,
IGCT dalay32 turns on, by relay brk short circuit, and after a power network current cycle, relay brk31=1, that is, continue
Electrical equipment brk31 open circuit, now only IGCT dalay31, IGCT dalay32 conducting, connect bus and transformator；
After (4) IGCT dalay31, IGCT dalay32 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), start to detect ia2 sense of current.
(5) (postpone not over 1 millisecond) when ia2 electric current is positive, to IGCT dalay33, IGCT
Dalay34, IGCT dalay35 trigger, stop to IGCT dalay31, IGCT dalay32 trigger, electric current
I2 still circulates, and now ea voltage is just also；.
(6) after IGCT dalay33, IGCT dalay34, IGCT dalay35 turn on three cycles in turn, relay
Device brk33 closes, and stops, to IGCT dalay33, IGCT dalay34, IGCT dalay35 trigger, so far switching
Process all terminates.
The voltage reduction circuit of load side step-down transformer includes relay brk41, relay brk42, relay
Brk43, resistance r41, resistance r42, IGCT dalay41, IGCT dalay42, IGCT dalay43, IGCT
Dalay44, inductance l4 and power supply；
The anode of IGCT dalay41, IGCT dalay42 negative electrode, relay brk42 connected load side step-down transformer
The second subprime of Secondary Winding one end, the other end of the second subprime of the Secondary Winding of load side step-down transformer and relay
Device brk41, relay brk43, inductance l4 are connected, and relay brk41, relay brk43, inductance l4 are dropped with load side simultaneously
One end of first level of the Secondary Winding of pressure transformer is connected, the other end of first level (coil 2) ground connection, inductance l4 with
The anode of IGCT dalay43, the negative electrode of IGCT dalay44 are connected, relay brk41, relay brk42, resistance
R41, the negative electrode of IGCT dalay41, the anode of IGCT dalay42, the negative electrode of IGCT dalay43, IGCT dalay44
Anode connects resistance r42, power supply after being connected.
The blood pressure lowering of load side step-down transformer controls, and specifically includes following steps:
Including relay brk41, relay brk42, relay brk43, resistance r41, resistance r42, IGCT
Dalay41, IGCT dalay42, IGCT dalay43, IGCT dalay44, inductance l4 and power supply；
(1) original state: relay brk41, relay brk43 closure conducting, brk41=0, brk43=0, brk42=
1, i.e. relay brk41, relay brk43 closure conducting, relay brk42 off-state.IGCT dalay41, IGCT
Dalay42, IGCT dalay43, IGCT dalay44 are 0, do not trigger, IGCT dalay41, IGCT
Dalay42, IGCT dalay43, IGCT dalay44 are not turned on, and electric current circulates through relay brk41；
(2) in starting point positive period of current cycle, relay brk41=1, disconnect, now electric current is through relay brk43
Circulation, due to the partial pressure effect on resistance r41, there is positive voltage at IGCT dalay43, IGCT dalay44 two ends；
(3) after time delay, to IGCT dalay43, IGCT dalay44d1 trigger, IGCT
Dalay43, IGCT dalay44 turn on, by relay brk43 short circuit, and after 0.02 second, brk43=1, i.e. and relay
Brk43 open circuit, now only IGCT dalay43, IGCT dalay44 conducting, connect bus and transformator；
After (4) IGCT dalay43, IGCT dalay44 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), detect ia2 sense of current.
(5) when ia2 electric current is positive, now ea voltage is just also, when voltage is gradually by being just reduced to 0, electricity
The direction of stream just remains as, and in subsequent time, voltage is negative, and electric current is just.
(6) electricity be when flowing for timing, and when voltage ea is detected be negative, to IGCT dalay41 trigger, stops to crystalline substance
Brake tube dalay43, IGCT dalay44d1 trigger, IGCT dalay43, IGCT dalay44 continue by maintaining electric current
Conducting.
(7) when ia2 is kept to 0, IGCT dalay43, IGCT dalay44 end in the case of not maintaining electric current
Turn off, and then so that the tap of No. 2 coils and bus is disconnected.And No. 2 coils and No. 3 coil currents are 0 at the moment, potential is also
0, electrical source voltage is less than zero, and IGCT dalay41 bears No. 3 forward voltages between transformator and power supply and turns on, then,
The switching of tap is realized in the case of electric current is unbroken.
(8), after IGCT dalay41 conducting, to IGCT dalay42 trigger, IGCT turned on for three weeks in turn
After phase, relay brk42 closes, and stops to IGCT dalay41 and IGCT dalay42 trigger, so far load side
The blood pressure lowering handoff procedure of step-down transformer all terminates.
Compared with prior art, the present invention includes following beneficial effect:
1. in transformer belt load running, electric current does not interrupt and continuously requires lower switching thyristor switch the present invention,
Transient process will not be produced, electric current enters stable state quickly, stepless short circuit, stepless overvoltage, electric current consecutive variations, will not go out
Existing line powering disruption；
2. the present invention, in on-load voltage regulation switching mechanical switch, will not cut off electric current, will not produce electric arc, extend machinery
The service life of switch；
3., for the method for present invention design, when circuit normally runs, electric current flows through mechanical switch, without flow through brilliant lock
Pipe, does not bear too high voltage on IGCT simultaneously, protects IGCT.
Brief description
Fig. 1 is the boost control circuit of power plant booster transformer；
Fig. 2 is the voltage reduction circuit of power plant booster transformer；
Fig. 3 is the boost control circuit of load side step-down transformer；
Fig. 4 is the voltage reduction circuit of load side step-down transformer；
Fig. 5 is the boosting rectifier control process load change in voltage waveform of power plant booster transformer
The blood pressure lowering control process load voltage change waveform of Fig. 6 power plant booster transformer；
Fig. 7 is the boosting rectifier control process load voltage waveform of load side step-down transformer；
Fig. 8 is the blood pressure lowering control process load voltage waveform of load side step-down transformer.
Specific embodiment
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of photo-thermal generates electricity by way of merging two or more grid systems on-load voltage regulation control method,
(1) boosting rectifier control of power plant booster transformer: by switching the boost control circuit of power plant booster transformer
In turn on thyristors direction controlling power plant booster transformer boosting；
(2) blood pressure lowering of power plant booster transformer controls: by switching the voltage reduction circuit of power plant booster transformer
In turn on thyristors direction controlling power plant booster transformer blood pressure lowering；
(3) boost process of load side step-down transformer: by the boost control circuit of switchable load side step-down transformer
In turn on thyristors direction controlling load side step-down transformer boosting；
(4) pressure reduction of load side step-down transformer: by the voltage reduction circuit of switchable load side step-down transformer
In turn on thyristors direction controlling load side step-down transformer blood pressure lowering.
As shown in figure 1, the boost control circuit of power plant booster transformer includes: relay brk11, relay brk12,
Relay brk13, resistance r11, resistance r12, solid-state switch d11, the second solid-state switch d12 and inductance l；
Solid-state switch d11 passes through IGCT dalay11, IGCT dalay12 inverse parallel composition；Solid-state switch d12 passes through
IGCT dalay13, IGCT dalay14 inverse parallel composition；
IGCT dalay13, IGCT dalay14 inverse parallel connect, the anode of IGCT dalay13 and negative electrode respectively with
The negative electrode of IGCT dalay14 is connected with anode；The anode of IGCT dalay11 and negative electrode respectively with IGCT dalay12
Negative electrode be connected with anode；Relay brk13, the anode of IGCT dalay11, the negative electrode of IGCT dalay12 are all connected with
One end of the second subprime (coil 3) of the Secondary Winding of power plant booster transformer, relay brk12, IGCT dalay13
Anode, the negative electrode of IGCT dalay14 are all connected with the another of the second subprime (coil 3) of the Secondary Winding of power plant booster transformer
One end；Relay brk11 is connected first level (coil of the Secondary Winding of power plant booster transformer with resistance r11 after connecting
2) one end；The other end ground connection of first level (coil 2) of the Secondary Winding of power plant booster transformer；IGCT
The negative electrode of dalay11, the negative electrode of IGCT dalay13 and relay brk11, relay brk12, the sky of relay brk13 connect
End is connected in series and is grounded with resistance r12, inductance l after being connected.
The boost process of power plant booster transformer specifically includes following steps:
(1) original state: relay brk11, relay brk12 closure, relay brk13 disconnect；Brk12=0,
Brk11=0, brk13=1, i.e. relay brk12 and relay brk11 closure conducting, brk13 off-state.IGCT dalay11,
IGCT dalay12, IGCT dalay13, IGCT dalay14 are 0, do not trigger, IGCT dalay11, IGCT
Dalay12, IGCT dalay13, IGCT dalay14 are not turned on, and electric current circulates through relay brk1；
(2) disconnect in 0.2 second moment (in starting point positive period of current cycle) relay brk12, brk12=1, this
When electric current through relay brk11 circulate, due on resistance r11 partial pressure effect, IGCT dalay13, IGCT dalay14 two
There is positive voltage at end；
(3) after the time delay of 0.1 second, to IGCT dalay13, IGCT dalay14 trigger, IGCT
Dalay13, IGCT dalay14 turn on, and by relay brk11 short circuit, after 0.02 second, relay brk11 disconnects, brk11
=1, i.e. brk open circuit, now only IGCT dalay13, IGCT dalay14 conducting, connect bus and transformator；
After (4) IGCT dalay13, IGCT dalay14 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), detect auxiliary switch branch current ia2 sense of current；
(5) when auxiliary switch branch current ia2 electric current is detected and being positive () in Fig. 1 from left to right (this measurement exists
It is easily achieved in engineering, postpone not over 1 millisecond), to relay brk11 trigger, stop to IGCT simultaneously
Dalay13, IGCT dalay14 trigger.Second subprime (line due to the now Secondary Winding of power plant booster transformer
Circle 3) the port of export be more than transformator first level (coil 2) of Secondary Winding outlet voltage, IGCT dalay11 holds
Turned on by the forward voltage of second subprime, IGCT dalay13, IGCT dalay14 bear the backward voltage of second subprime
And end.IGCT dalay13, the electric current of IGCT dalay14 are immediately turned off to 0 by more than 0 bust, are closed by magnetic potential balance
System's analysis, before current switching, f3+f2=f1, after current switching, f3=f1-f2=0 (f1、f2、f3Be respectively transformator once around
Group, first level of Secondary Winding, the magnetic potential of the second subprime of Secondary Winding, i.e. coil 1, coil 2, the magnetic potential of coil 3), institute
With from magnetic potential balance relation, so should be complete by the electric current undertaking of IGCT dalay13, IGCT dalay14
Portion switchs to be circulated by coil 3, and the electric current of coil 3 is us*(n2+n3)/n1* z, tap steadily switches, and will not produce any shape
The impact of formula.usFor system voltage, n1、n2、n3It is respectively transformator first winding, first level, Secondary Winding of Secondary Winding
Second subprime the number of turn, z be impedance；u1、u2、u3Be respectively depressor first winding, first level of Secondary Winding, secondary around
The voltage of the second subprime of group；
(6) after IGCT dalay11 conducting, to IGCT dalay12 trigger, IGCT dalay11,
(0.06 second, be mainly in view of the time delay of the actuating of relay), relay after dalay12 turns on three cycles in turn
Brk13 closes, and stops to IGCT dalay11, IGCT dalay12 trigger, the so far liter of power plant booster transformer
Voltage-controlled handoff procedure processed all terminates.
As seen from Figure 5, the boost process of power plant booster transformer does not have the impact of voltage or electric current, if measurement postpones
Between short (less than 1 millisecond), the boosting rectifier control handoff procedure transient process of power plant booster transformer is very short.
As shown in Fig. 2 the voltage reduction circuit of power plant booster transformer, including relay brk21, relay brk22,
Relay brk23, resistance r21, resistance r22, solid-state switch d21, IGCT dalay23, IGCT dalay24, IGCT
Dalay25 and inductance l2；Solid-state switch d21 includes IGCT dalay21, IGCT dalay22；
The anode of IGCT dalay21 is connected with the negative electrode of IGCT dalay22 and anode respectively with negative electrode；IGCT
The negative electrode of dalay24 connects the anode of IGCT dalay25, and the negative electrode of IGCT dalay25 connects the sun of IGCT dalay23
Pole, the negative electrode of IGCT dalay23 connects the anode of IGCT dalay24；Relay brk21 is connected with resistance r21, relay
Brk22, resistance r21, the anode of IGCT dalay21, IGCT dalay22 negative electrode all with power plant booster transformer
One end of the second subprime (coil 3) of Secondary Winding is connected, the second subprime (line of the Secondary Winding of power plant booster transformer
Circle 3) the other end be connected with the negative electrode of relay brk23, the anode of IGCT dalay23, IGCT dalay25, meanwhile,
Relay brk23, the anode of IGCT dalay23, the negative electrode of IGCT dalay25 are connected the two of power plant booster transformer
One end of first level (coil 2) of secondary winding；First level (coil 2) of the Secondary Winding of power plant booster transformer another
One end is grounded；The negative electrode of IGCT dalay21, the negative electrode of IGCT dalay23 and relay brk21, relay brk22, continue
The sky of electrical equipment brk23 connects connects and is grounded with resistance r22, inductance l2 after end is connected.
The blood pressure lowering of power plant booster transformer controls, and specifically includes:
(1) original state: relay brk21, relay brk22 closure, relay brk23 disconnects, brk21=0,
Brk22=0, brk23=1, i.e. relay brk21 and brk22 closure conducting, brk23 off-state.Signal d1, delay and delay2
It is all 0, do not trigger, IGCT dalay21, IGCT dalay22 IGCT d1, IGCT dalay23, IGCT
Dalay24, IGCT dalay25 are not turned on, and electric current circulates through relay brk22；
(2) in 0.2 second moment relay brk22=1, relay brk22 disconnects, and now electric current flows through relay brk21
Logical, due to the effect of ohmically partial pressure, there is positive voltage at IGCT dalay21, IGCT dalay22 two ends；
(3) after the time delay of 0.1 second, to IGCT dalay21, IGCT dalay22d1 trigger, IGCT
Dalay21, IGCT dalay22 turn on, by relay brk21 short circuit, and after 0.02 second, relay brk21=1, that is, continue
Electrical equipment brk21 open circuit, now only IGCT dalay21, IGCT dalay22 conducting, connect bus and transformator；
After (4) IGCT dalay21, IGCT dalay22 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), the direction of detection auxiliary switch branch current ia2；
(5) when the second subprime (coil 3) Secondary Winding that ia2 electric current is forward direction and power plant booster transformer is detected
The voltage of output voltage ea (as shown in Fig. 2 from top to bottom be positive direction) be that (this measurement is easy to reality in engineering for timing
Existing), to IGCT delay23 trigger.Second subprime (coil due to the now Secondary Winding of power plant booster transformer
3) the port of export is more than the outlet voltage of first level (coil 2) of Secondary Winding of power plant booster transformer, IGCT
Delay23 bears the backward voltage of the second subprime (coil 3) of the Secondary Winding of power plant booster transformer, is not turned on；
(6) when ia2 is kept to 0, IGCT dalay21, IGCT dalay22 are not having trigger and are maintaining electric current
In the case of cut-off turn off, and then so that the tap of No. 2 coils is disconnected with bus.And load side electric current is 0 at the moment, potential is also
The tap potential of 0, No. 2 coil is more than zero, and IGCT delay23 bears the forward voltage between coil 2 and the earth and turns on,
Then, it is the switching realizing tap in the case of zero in electric current, no-voltage overshoots；
(7) after IGCT delay23 conducting, to IGCT delay24, IGCT delay25 trigger, IGCT
After delay24, IGCT delay25 turn on three cycles in turn (0.06 second, be mainly in view of the actuating of relay delay when
Between), relay brk23 closes, and stops to IGCT delay23 and IGCT delay24, IGCT delay25 trigger,
So far handoff procedure all terminates.
As seen from Figure 6, switch at electric current is for zero point, there is no the impact of voltage or electric current, also there is no transient process.
As shown in figure 3, the boosting rectifier control of load side step-down transformer, specifically include:
Including relay brk31, relay brk32, relay brk33, resistance r31, resistance r32, IGCT
Dalay31, IGCT dalay32, IGCT dalay33, IGCT dalay34, IGCT dalay35 and power supply；
The anode of IGCT dalay31 is connected with the negative electrode of IGCT dalay32 and anode respectively with negative electrode；IGCT
The negative electrode of dalay34 connects the anode of IGCT dalay35, and the negative electrode of IGCT dalay35 connects the sun of IGCT dalay33
Pole, the negative electrode of IGCT dalay33 connect IGCT dalay34 anode；Relay brk31 is connected with resistance r31, relay
Device brk32, resistance r31, the anode of IGCT dalay31, IGCT dalay32 negative electrode all with power plant booster transformer
One end of the second subprime (coil 3) of Secondary Winding is connected, the second subprime (line of the Secondary Winding of power plant booster transformer
Circle 3) the other end be connected with the negative electrode of relay brk33, the anode of IGCT dalay33, IGCT dalay35, meanwhile,
Relay brk33, the anode of IGCT dalay33, the negative electrode of IGCT dalay35 are connected the two of power plant booster transformer
One end of first level (coil 2) of secondary winding；First level (coil 2) of the Secondary Winding of power plant booster transformer another
One end is grounded；The negative electrode of IGCT dalay31, the negative electrode of IGCT dalay33 and relay brk31, relay brk32, continue
The sky of electrical equipment brk33 connects after end is connected with resistance r32, power sources in series and is grounded.
As seen from Figure 7, the boosting transition of load side step-down transformer obtains very smooth, transient process very little.
As shown in figure 4, the boosting rectifier control of load side step-down transformer, specifically include following steps:
(1) original state: relay brk31, relay brk32 closure conducting, relay brk33 disconnects, brk31=0,
Brk32=0, brk33=1, i.e. relay brk31 and brk32 closure conducting, relay brk33 off-state.IGCT dalay31,
IGCT dalay32, IGCT dalay33, IGCT dalay34, IGCT dalay35 are 0, do not trigger, IGCT
Dalay31, IGCT dalay32, IGCT dalay33, IGCT dalay34, IGCT dalay35 are not turned on, electric current
Through relay brk32 circulation；
(2) disconnect in 0.2 second moment relay brk32, relay brk32=1, disconnect, now electric current is through relay
Brk31 circulates, and due to the partial pressure effect on resistance r31, there is positive voltage at IGCT dalay31, IGCT dalay32 two ends；
(3) after the time delay of 0.1 second, to IGCT dalay31, IGCT dalay32 trigger, IGCT
Dalay31, IGCT dalay32 turn on, by relay brk short circuit, and after 0.02 second, relay brk31=1, i.e. and relay
Device brk31 open circuit, now only IGCT dalay31, IGCT dalay32 conducting, connect bus and transformator；
After (4) IGCT dalay31, IGCT dalay32 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), start to detect ia2 sense of current.
(5) (postpone not over 1 millisecond) when ia2 electric current is positive, to IGCT dalay33, IGCT
Dalay34, IGCT dalay35 trigger, stop to IGCT dalay31, IGCT dalay32 trigger, electric current
I2 still circulates.Now ea voltage is also just No. 2 coil terminal voltages u2=us*n2/(n2+n3), No. 3 coil terminal voltages u3=
us*n3/(n2+n3), u2＜ us, IGCT dalay34, IGCT dalay35 bear forward voltage and turn on, No. 2 coil-end electricity
Pressure is quickly raised to supply voltage, and due to electromagnetic induction effect, load side voltage is rapidly by us*n1/(n2+n3) it is increased to us*n1/
n2, the coil-induced voltage u of voltage 33=n3/n2*us＞ 0, bears backward voltage.IGCT dalay31, IGCT dalay32
Electric current be immediately turned off to 0 by more than 0 bust.By magnetic potential balance relation analyses, before current switching, f3+f2=f1, electric current
After switching, f3=f1-f2=0, so from magnetic potential balance relation, the electric current of coil 3 is 0, but will never produce any punching
Hit.
(6) after IGCT dalay33, IGCT dalay34, IGCT dalay35 turn on three cycles in turn, relay
Device brk33 closes, and stops, to IGCT dalay33, IGCT dalay34, IGCT dalay35 trigger, so far switching
Process all terminates.
As Fig. 4, the voltage reduction circuit of load side step-down transformer includes relay brk41, relay brk42, relay
Device brk43, resistance r41, resistance r42, IGCT dalay41, IGCT dalay42, IGCT dalay43, IGCT
Dalay44, inductance l4 and power supply；
The anode of IGCT dalay41, IGCT dalay42 negative electrode, relay brk42 connected load side step-down transformer
The second subprime (coil 3) of Secondary Winding one end, the second subprime (coil 3) of the Secondary Winding of load side step-down transformer
The other end be connected with relay brk41, relay brk43, inductance l4, relay brk41, relay brk43, inductance l4
It is connected with one end of first level (coil 2) of the Secondary Winding of load side step-down transformer simultaneously, first level (coil 2)
Other end ground connection, inductance l4 is connected with the anode of IGCT dalay43, the negative electrode of IGCT dalay44, relay
Brk41, relay brk42, resistance r41, the negative electrode of IGCT dalay41, the anode of IGCT dalay42, IGCT
The negative electrode of dalay43, IGCT dalay44 anode connect resistance r42, power supply after being connected.
The blood pressure lowering of load side step-down transformer controls, and specifically includes following steps:
Including relay brk41, relay brk42, relay brk43, resistance r41, resistance r42, IGCT
Dalay41, IGCT dalay42, IGCT dalay43, IGCT dalay44, inductance l4 and power supply；
(1) original state: relay brk41, relay brk43 closure conducting, brk41=0, brk43=0, brk42=
1, i.e. relay brk41, relay brk43 closure conducting, relay brk42 off-state.IGCT dalay41, IGCT
Dalay42, IGCT dalay43, IGCT dalay44 are 0, do not trigger, IGCT dalay41, IGCT
Dalay42, IGCT dalay43, IGCT dalay44 are not turned on, and electric current circulates through relay brk41；
(2) in 0.2 second moment relay brk41=1, disconnect, now electric current circulates through relay brk43, due to resistance
Partial pressure effect on r41, there is positive voltage at IGCT dalay43, IGCT dalay44 two ends；
(3) after the time delay of 0.1 second, to IGCT dalay43, IGCT dalay44d1 trigger, IGCT
Dalay43, IGCT dalay44 turn on, by relay brk43 short circuit, and after 0.02 second, brk43=1, i.e. and relay
Brk43 open circuit, now only IGCT dalay43, IGCT dalay44 conducting, connect bus and transformator；
After (4) IGCT dalay43, IGCT dalay44 turn on three cycles (0.06 second, it is mainly in view of relay
The time delay of device action), detect ia2 sense of current.
(5) when ia2 electric current is positive (from left to right), now ea voltage just (from top to bottom) is also, but due to inductance
Current lagging voltage in l4 circuit, when voltage is gradually by being just reduced to 0, sense of current just remains as, in lower a period of time
Carve, voltage is negative, electric current is just.
(6) electricity be when flowing for timing, and (this measurement is easily achieved in engineering) when voltage ea is negative is detected, to crystalline substance
Brake tube dalay41 trigger, stops to IGCT dalay43, IGCT dalay44d1 trigger, IGCT
Dalay43, IGCT dalay44 continue conducting by maintaining electric current.Because the port of export of coil 3 belongs to same with the port of export of coil 2
Name end, in the same direction, ea is negative to voltage, and IGCT dalay41 bears the backward voltage of coil 3, is not turned on.
(7) when ia2 is kept to 0, IGCT dalay43, IGCT dalay44 end in the case of not maintaining electric current
Turn off, and then so that the tap of coil 2 and bus is disconnected.And No. 2 coils are 0 with coil 3 electric current at the moment, potential is also 0, electricity
Source potential be less than zero, IGCT dalay41 bears the forward voltage between coil 3 and power supply and turns on, then, electric current not in
The switching of tap is realized in the case of disconnected.
(8), after IGCT dalay41 conducting, to IGCT dalay42 trigger, IGCT turned on for three weeks in turn
After phase, relay brk42 closes, and stops, to IGCT dalay41 and IGCT dalay42 trigger, so far switching
Journey all terminates.
As seen from Figure 8, the blood pressure lowering of load side step-down transformer switches at electric current is for zero point, does not have rushing of voltage or electric current
Hit, also there is no transient process.
Those skilled in the art the present invention can be modified or modification design but the think of without departing from the present invention
Think and scope.Therefore, if these modifications of the present invention and modification belong to the claims in the present invention and its equivalent technical scope
Within, then the present invention is also intended to comprise these changes and modification.
Claims (8)
1. a kind of photo-thermal generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that including,
The boosting rectifier control of power plant booster transformer: by the brilliant lock in the boost control circuit of switching power plant booster transformer
Pipe conducting direction controls the boosting of power plant booster transformer；
The blood pressure lowering of power plant booster transformer controls: by the brilliant lock in the voltage reduction circuit of switching power plant booster transformer
Pipe conducting direction controls the blood pressure lowering of power plant booster transformer；
The boost process of load side step-down transformer: by the brilliant lock in the boost control circuit of switchable load side step-down transformer
Pipe conducting direction controls the boosting of load side step-down transformer；
The pressure reduction of load side step-down transformer: by the brilliant lock in the voltage reduction circuit of switchable load side step-down transformer
Pipe conducting direction controls the blood pressure lowering of load side step-down transformer；
The boost control circuit of described power plant booster transformer includes:
Relay brk11, relay brk12, relay brk13, resistance r11, resistance r12, solid-state switch d11, the second solid-state
Switch d12 and inductance l；
Described solid-state switch d11 passes through IGCT dalay11, IGCT dalay12 inverse parallel composition；Described solid-state switch d12
By IGCT dalay13, IGCT dalay14 inverse parallel composition；
Described IGCT dalay13, IGCT dalay14 inverse parallel connect, the anode of IGCT dalay13 and negative electrode respectively with
The negative electrode of IGCT dalay14 is connected with anode；The anode of described IGCT dalay11 and negative electrode respectively with IGCT
The negative electrode of dalay12 is connected with anode；Relay brk13, the anode of IGCT dalay11, the negative electrode of IGCT dalay12
It is all connected with one end of the second subprime of the Secondary Winding of power plant booster transformer, relay brk12, IGCT dalay13
Anode, the negative electrode of IGCT dalay14 are all connected with the other end of the second subprime of Secondary Winding of power plant booster transformer；Continue
Electrical equipment brk11 is connected one end of first level of Secondary Winding of power plant booster transformer with resistance r11 after connecting；Power plant
The other end ground connection of first level of the Secondary Winding of booster transformer；The negative electrode of described IGCT dalay11, IGCT
The negative electrode of dalay13 and relay brk11, relay brk12, the sky of relay brk13 connect after end is connected with resistance r12,
Inductance l is connected in series and is grounded.
2. a kind of photo-thermal according to claim 1 generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that described generating
The boost process of factory's booster transformer specifically includes following steps:
(1) original state: relay brk11, relay brk12 closure, relay brk13 disconnect；IGCT dalay11, crystalline substance
Brake tube dalay12, IGCT dalay13, IGCT dalay14 are not turned on, and electric current circulates through relay brk1；
(2) relay brk12 disconnects, and electric current circulates through relay brk11, IGCT dalay13, IGCT dalay14 two ends
There is positive voltage；
(3) after time delay, to IGCT dalay13, IGCT dalay14 trigger, IGCT dalay13, brilliant lock
Pipe dalay14 turns on, and by relay brk11 short circuit, after a power network current cycle, relay brk11 disconnects；
(4) after IGCT dalay13, IGCT dalay14 turn on three cycles, detection auxiliary switch branch current ia2 electricity
The direction of stream；
(5) when it is positive for auxiliary switch branch current ia2 electric current is detected, to relay brk11 trigger, stop simultaneously
To IGCT dalay13, IGCT dalay14 trigger；
(6), after IGCT dalay11 conducting, to IGCT dalay12 trigger, IGCT dalay11, dalay12 take turns
After conductance leads to three cycles, relay brk13 closes, and stops to IGCT dalay11, IGCT dalay12 trigger,
The boosting handoff procedure of power plant booster transformer terminates.
3. a kind of photo-thermal according to claim 1 generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that described generating
The voltage reduction circuit of factory's booster transformer, including relay brk21, relay brk22, relay brk23, resistance r21, electricity
Resistance r22, solid-state switch d21, IGCT dalay23, IGCT dalay24, IGCT dalay25 and inductance l2；Described solid-state
Switch d21 includes IGCT dalay21, IGCT dalay22；
The anode of IGCT dalay21 is connected with the negative electrode of IGCT dalay22 and anode respectively with negative electrode；Described IGCT
The negative electrode of dalay24 connects the anode of IGCT dalay25, and the negative electrode of IGCT dalay25 connects the sun of IGCT dalay23
Pole, the negative electrode of IGCT dalay23 connects the anode of IGCT dalay24；Relay brk21 is connected with resistance r21, relay
Brk22, resistance r21, the anode of IGCT dalay21, the negative electrode of IGCT dalay22 all with power plant booster transformer two
One end of the second subprime of secondary winding is connected, the other end of the second subprime of the Secondary Winding of power plant booster transformer and institute
State relay brk23, the anode of IGCT dalay23, the negative electrode of IGCT dalay25 are connected, meanwhile, relay brk23,
The anode of IGCT dalay23, the negative electrode of IGCT dalay25 be connected power plant booster transformer Secondary Winding first
Secondary one end；The other end ground connection of first level of the Secondary Winding of power plant booster transformer；Described IGCT dalay21
Negative electrode, the negative electrode of IGCT dalay23 and relay brk21, relay brk22, the sky of relay brk23 connect end and be connected
Connect and be grounded with described resistance r22, inductance l2 afterwards.
4. a kind of photo-thermal according to claim 3 generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that described generating
The blood pressure lowering of factory's booster transformer controls, and specifically includes following steps:
(1) original state: relay brk21, relay brk22 closure, relay brk23 disconnects, and electric current is through relay brk22
Circulation；
(2) relay brk22 disconnects, and now electric current circulates through relay brk21, IGCT dalay21, IGCT dalay22
There is positive voltage at two ends；
(3) after time delay, to IGCT dalay21, IGCT dalay22 trigger, IGCT dalay21, brilliant lock
Pipe dalay22 turns on, by relay brk21 short circuit, after a power network current cycle, relay brk21 open circuit；
(4) after IGCT dalay21, IGCT dalay22 turn on three cycles, detection auxiliary switch branch current ia2's
Direction；
(5) when the output voltage of the second subprime Secondary Winding that ia2 electric current is forward direction and power plant booster transformer is detected
The voltage of ea is timing, to IGCT delay23 trigger；
(6) when ia2 is kept to 0, IGCT dalay21, IGCT dalay22 are in the situation not having trigger and maintain electric current
Lower cut-off turns off, and is the switching realizing tap in the case of zero in electric current, and no-voltage overshoots；
(7) after IGCT delay23 conducting, to IGCT delay24, IGCT delay25 trigger, IGCT
After delay24, IGCT delay25 turn on three cycles in turn, relay brk23 closes, and stops to IGCT delay23
With IGCT delay24, IGCT delay25 trigger, the blood pressure lowering handoff procedure of power plant booster transformer terminates.
5. a kind of photo-thermal according to claim 1 generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that described load
The boost control circuit of side step-down transformer, including relay brk31, relay brk32, relay brk33, resistance r31, electricity
Resistance r32, IGCT dalay31, IGCT dalay32, IGCT dalay33, IGCT dalay34, IGCT dalay35 and
Power supply；
The anode of IGCT dalay31 is connected with the negative electrode of IGCT dalay32 and anode respectively with negative electrode；Described IGCT
The negative electrode of dalay34 connects the anode of IGCT dalay35, and the negative electrode of IGCT dalay35 connects the sun of IGCT dalay33
Pole, the negative electrode of IGCT dalay33 connect IGCT dalay34 anode；Relay brk31 is connected with resistance r31, relay
Device brk32, resistance r31, the anode of IGCT dalay31, IGCT dalay32 negative electrode all with power plant booster transformer
One end of the second subprime of Secondary Winding is connected, the other end of the second subprime of the Secondary Winding of power plant booster transformer with
Described relay brk33, the anode of IGCT dalay33, the negative electrode of IGCT dalay35 are connected, meanwhile, relay
Brk33, the anode of IGCT dalay33, the negative electrode of IGCT dalay35 are connected the Secondary Winding of power plant booster transformer
First level one end；The other end ground connection of first level of the Secondary Winding of power plant booster transformer；Described IGCT
The negative electrode of dalay31, the negative electrode of IGCT dalay33 and relay brk31, relay brk32, the sky of relay brk33 connect
End be connected after with described resistance r32, power sources in series and be grounded.
6. a kind of photo-thermal according to claim 5 generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that described load
The boosting rectifier control of side step-down transformer, specifically includes following steps:
(1) original state: relay brk31, relay brk32 closure conducting, relay brk33 disconnects；
(2) relay brk32 disconnects, and electric current circulates through relay brk31, IGCT dalay31, IGCT dalay32 two ends
There is positive voltage；
(3) after time delay, to IGCT dalay31, IGCT dalay32 trigger, IGCT dalay31, brilliant lock
Pipe dalay32 turns on, by relay brk short circuit, after 0.02 second, relay brk31 open circuit；
(4), after IGCT dalay31, IGCT dalay32 turn on three cycles, start to detect auxiliary switch branch current
Ia2 sense of current；
(5) when ia2 electric current is positive, to IGCT dalay33, IGCT dalay34, IGCT dalay35 trigger,
Stop to IGCT dalay31, IGCT dalay32 trigger, electric current i2 still circulates；
(6) after IGCT dalay33, IGCT dalay34, IGCT dalay35 turn on three cycles in turn, relay
Brk33 closes, and stops to IGCT dalay33, IGCT dalay34, IGCT dalay35 trigger, load side blood pressure lowering
The boosting handoff procedure of transformator terminates.
7. a kind of photo-thermal according to claim 1 generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that described load
The voltage reduction circuit of side step-down transformer includes relay brk41, relay brk42, relay brk43, resistance r41, electricity
Resistance r42, IGCT dalay41, IGCT dalay42, IGCT dalay43, IGCT dalay44, inductance l4 and power supply；
The anode of IGCT dalay41, IGCT dalay42 negative electrode, the two of relay brk42 connected load side step-down transformer
One end of the second subprime of secondary winding, the other end of the second subprime of the Secondary Winding of load side step-down transformer and described relay
Device brk41, relay brk43, inductance l4 are connected, described relay brk41, relay brk43, inductance l4 simultaneously with load
One end of first level of the Secondary Winding of side step-down transformer is connected, the other end ground connection of described first level, described electricity
Sense l4 is connected with the anode of IGCT dalay43, the negative electrode of IGCT dalay44, described relay brk41, relay
Brk42, resistance r41, the negative electrode of IGCT dalay41, the anode of IGCT dalay42, the negative electrode of IGCT dalay43, crystalline substance
Brake tube dalay44 anode connects resistance r42, power supply after being connected.
8. a kind of photo-thermal according to claim 7 generates electricity by way of merging two or more grid systems on-load voltage regulation control method it is characterised in that described load
The blood pressure lowering of side step-down transformer controls, and specifically includes following steps:
(1) original state: relay brk41, relay brk43 closure conducting, relay brk42 off-state；
(2) relay brk41 disconnects, and electric current circulates through relay brk43, IGCT dalay43, IGCT dalay44 two ends
There is positive voltage；
(3) after time delay, to IGCT dalay43, IGCT dalay44 trigger, IGCT dalay43, brilliant lock
Pipe dalay44 turns on, by relay brk43 short circuit, after 0.02 second, relay brk43 open circuit；
(4) after IGCT dalay43, IGCT dalay44 turn on three cycles, detection auxiliary switch branch current ia2 electricity
The direction of stream；
(5) when ia2 electric current is positive, the output voltage ea voltage of the second subprime of the Secondary Winding of power plant booster transformer
Also just it is, when voltage is gradually by being just reduced to 0, sense of current is that just in subsequent time, voltage is negative, and electric current is
Just；
(6) electricity be when flowing for timing, and when voltage ea is detected be negative, to IGCT dalay41 trigger, stops to IGCT
Dalay43, IGCT dalay44 trigger, IGCT dalay43, IGCT dalay44 continue conducting by maintenance electric current,
IGCT dalay41 is not turned on；
(7) when ia2 is kept to 0, IGCT dalay43, IGCT dalay44 end pass in the case of not maintaining electric current
Disconnected；
(8) IGCT dalay41 conducting after, to IGCT dalay42 trigger, IGCT turn in turn three cycles it
Afterwards, relay brk42 closure, stops to IGCT dalay41 and IGCT dalay42 trigger, load side downconverter
The blood pressure lowering handoff procedure of device terminates.
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| CN101414195A (en) * | 2008-12-05 | 2009-04-22 | 张培侠 | High voltage stabilizing feedback type electricity-saving device |
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