CN103036446A - Soft starting device and method for high-power transformer - Google Patents
Soft starting device and method for high-power transformer Download PDFInfo
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- CN103036446A CN103036446A CN2011102960702A CN201110296070A CN103036446A CN 103036446 A CN103036446 A CN 103036446A CN 2011102960702 A CN2011102960702 A CN 2011102960702A CN 201110296070 A CN201110296070 A CN 201110296070A CN 103036446 A CN103036446 A CN 103036446A
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Abstract
The invention discloses a soft starting device and method for a high-power transformer. The soft starting device for the high-power transformer comprises a current limiting module, a control module, a first switch module and a second switch module, wherein the current limiting module is connected between a mains supply and the high-power transformer and used for limiting starting current of the high-power transformer; the control module is used for generating first control singles when the high-power transformer performs soft starting and generating second control singles when the high-power transformer performs soft starting to power frequency; the first switch module is connected between the current limiting module and the high-power transformer, is connected according to the first control singles, and is disconnected according to the second control singles; and the second switch module is in parallel connection with the current limiting module, is disconnected according to the first switch module, and is connected according to the second control singles. Disconnection and connection of the first switch module and the second switch module are controlled through the control module, so that the high-power transformer is started smoothly under the conditions of current limiting, and automatic switching between power frequency power supply and frequency conversion power supply of the high-power transformer is further achieved.
Description
Technical field
The present invention relates to field transformer, relate in particular to a kind of high-power transformer soft starting device and method.
Background technology
In high-power transformer starts, adopt power frequency supply directly to start, starting current is excessive, the phenomenon of fuse or circuit breaker trip can occur.
The high-power transformer soft starting device adopts the method limiting starting current of string current-limiting resistance at present, thereby reaches the purpose of smooth starting.As shown in Figure 1, this high-power transformer soft starting device comprises circuit breaker Q F, A.C. contactor KB1, current-limiting resistance R.Circuit breaker Q F is electrically connected with the city, and A.C. contactor KB1 is connected between circuit breaker Q F and the high-power transformer T, and current-limiting resistance R is serially connected between circuit breaker Q F and the high-power transformer T.The operation principle of this high-power transformer soft starting device is: A.C. contactor KB1 disconnected when high-power transformer T started, and then current-limiting resistance R can limit the starting current of high-power transformer; After treating that high-power transformer T starts, A.C. contactor KB1 is closed, and civil power directly accesses high-power transformer T and powers to power consumption equipment.
Although soft starting device shown in Figure 1 reaches the purpose of high-power transformer smooth starting to a certain extent, A.C. contactor KB1 needs Artificial Control, may misoperation occur and affects the normal power supply of high-power transformer.
Summary of the invention
Main purpose of the present invention provides a kind of high-power transformer soft starting device, is intended to realize the power frequency power supply of high-power transformer and the automatic control of the switching of conversion power supply.
The invention provides a kind of high-power transformer soft starting device, comprising:
The current limliting module is connected between civil power and the high-power transformer, is used for the starting current of restriction high-power transformer;
Control module is used for producing the first control signal when the high-power transformer soft start, produce the second control signal during to power frequency at the high-power transformer soft start;
The first switch module is connected between current limliting module and the high-power transformer, and is closed according to the first control signal, disconnects according to the second control signal;
The second switch module, in parallel with the current limliting module, disconnect according to the first control signal, closed according to the second control signal.
Preferably, described control module is used for:
Control first the second switch module by the first control signal and disconnect, control again the first switch module closed;
Control first the second switch module by the second control signal closed, control again the first switch module and disconnect.
Preferably, described control module is used for: when the second module is in off-state, control the first switch module by the first control signal closed.
Preferably, described high-power soft starting drive also comprises phase-locked module, and is in parallel with the current limliting module, is used for before control module produces the second control signal, carries out phase-locked to input voltage and the output voltage of current limliting module.
Preferably, described current limliting module, phase-locked module and control module are integrated into frequency converter.
Preferably, described high-power soft starting drive also comprises circuit breaker, and an end is electrically connected with the city, and the other end is connected with current limliting module, second switch module and phase-locked module respectively.
The present invention also provides a kind of high-power transformer soft-start method, is applied to above-mentioned high-power soft starting drive, and the method comprising the steps of:
When high-power transformer started, control module produced the first control signal,, control connection disconnects in the second switch module between civil power and the high-power transformer, first switch module of control connection between current limliting module and high-power transformer is closed;
During to power frequency, control module produces the second control signal at the high-power transformer soft start, controls that the second module is closed, control the first module disconnects.
Preferably, described when high-power transformer starts, control module produces the first control signal, also comprises after connecting the step that is connected between current limliting module and the high-power transformer:
The current limliting module is sampled to its output voltage, and the electric current of sample rate current and setting is compared, if sample rate current then carries out current-limiting protection greater than the electric current of setting, its output current is adjusted into the setting electric current.
Preferably, described control module also comprises before producing the second control signal:
Input voltage and output voltage to the current limliting module carry out phase-locked.
Preferably, described phase-locked being specially:
Detect the input voltage of described current limliting module and the phase difference between the output voltage, and produce error signal; Carry out the adjustment of frequency and phase place according to error signal.
The present invention controls the cut-off/close of the first switch module and second switch module by control module, and passes through the current limliting module so that high-power transformer starts under the condition of current limliting reposefully.Thereby avoided the excessive problem of high-power transformer starting current, and realized that the high-power transformer power frequency supplies power to the automatic switchover between the conversion power supply.In addition, the present invention is also by phase lock circuitry, avoided because the overcurrent problem of switching moment that the phase difference of power frequency power supply and conversion power supply causes guarantees at switching moment impact electric current very little.
Description of drawings
Fig. 1 is the structural representation of high-power transformer soft starting device in the prior art;
Fig. 2 is the structural representation of high-power transformer soft starting device one embodiment of the present invention;
Fig. 3 is the structural representation of another embodiment of high-power transformer soft starting device of the present invention;
Fig. 4 is the structural representation of phase-locked module one embodiment among Fig. 3;
Fig. 5 is the schematic flow sheet of high-power transformer soft-start method one embodiment of the present invention;
Fig. 6 is the schematic flow sheet of another embodiment of high-power transformer soft-start method of the present invention.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Further specify technical scheme of the present invention below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 2, the present invention proposes the structural representation of a kind of high-power transformer soft starting device one embodiment.This high-power transformer soft starting device comprises current limliting module 10, control module 11, the first switch module 12 and second switch module 13.Wherein:
Whether control module 11 begins soft start for detection of high-power transformer, is then to produce the first control signal; Carry out in the soft start-up process at high-power transformer 14, whether it starts to power frequency, is then to produce the second control signal.
The first switch module 12 is connected between current limliting module 10 and the high-power transformer 14, is in closure state according to the first control signal, is in off-state according to the second control signal;
The first control signal of control module 11 is controlled first second switch module 13 and is disconnected, and controls the first switch module 12 closures again.Here need to prove, second switch module 13 can be before initial high-power transformer 14 start yet, and it is in off-state always, and then this moment, the first control signal only need be controlled the first switch module 12 closures.
The second control signal of control module 11 is controlled first second switch module 13 closures, controls the first switch module 12 again and disconnects.Because the degaussing time of high-power transformer 14 is very short,, will be impacted high-power transformer 14 generation currents during to conversion power supply by the power frequency power switching.So so can guarantee the space between second switch module 13 closures and 12 disconnections of the first switch module, the continued power of high-power transformer 14.
Above-mentioned the first switch module 12 and second switch module 13 can be relay or circuit breaker etc.Every control according to control module 11 disconnects or closed construction of switch, all within protection scope of the present invention.
The operation principle of the embodiment of the invention is:
(1) before starting high-power transformer 14, at first control module 11 produces the first control signal, and then the first switch module 12 is in closure state, and second switch module 13 is in off-state.Civil power is connected by current limliting module 10 and high-power transformer 14, makes high-power transformer 14 smooth startings;
(2) at high-power transformer 14 when 0Hz begins to carry out soft start and start to power frequency, control module 11 will produce the second control signal, then second switch module 13 is in closure state, this moment, civil power 15 was divided into two-way, the second switch module 13 of leading up to is connected with high-power transformer 14, another road is connected by current limliting module 10 and high-power transformer 14, simultaneously high-power transformer 14 is powered;
(3) after second switch module 13 is in closure state, the first switch module 12 is in off-state according to the second control signal, this moment, civil power 15 was connected by second switch module 13 and high-power transformer 14, high-power transformer 14 is carried out conversion power supply, namely finished the soft start of high-power transformer 14.
The embodiment of the invention is controlled the cut-off/close of the first switch modules 12 and second switch module 13 by control module 11, and passes through current limliting module 10 so that high-power transformer 14 starts under the condition of current limliting reposefully.Thereby avoided the excessive problem of high-power transformer 14 starting currents, and realized that high-power transformer 14 power frequencies supply power to the automatic switchover between the conversion power supply.
With reference to Fig. 3, the invention allows for the structural representation of another embodiment of high-power transformer soft starting device.On the basis of above-described embodiment, the present embodiment high-power transformer soft starting device also comprises phase-locked module 16, this phase-locked module 16 is in parallel with current limliting module 10, is used for before control module 11 produces the second control signal, carries out phase-locked to input voltage and the output voltage of current limliting module 10.
With reference to Fig. 4, phase-locked module 16 comprises phase discriminator 161, loop filter 162 and the voltage-controlled oscillator 163 that connects successively in the present embodiment, one end of phase discriminator 161 is connected with the input of current limliting module 10, and voltage-controlled oscillator 163 is connected with the output of current limliting module 10.
Above-mentioned phase-locked module 16 can also realize by software, and the principle that its software is realized is consistent with hard-wired principle, by the input voltage of detectability flow module 10 and the phase difference between the output voltage, and the generation error signal; Carry out again the adjustment of frequency and phase place according to this error signal, to realize phase-locked to the input voltage of current limliting module 10 and output voltage.
The high-power transformer soft starting device also comprises circuit breaker 17 in above-described embodiment, and the one end is connected with civil power 15, and the other end is connected with current limliting module 10, second switch module 13 and phase-locked module 16 respectively.When the overtension of civil power 15, its circuit breaker 17 blows first, has avoided the damage to the circuit of back.
Fig. 5 is the schematic flow sheet of a kind of high-power transformer soft-start method one embodiment of the present invention.
With reference to Fig. 5, a kind of high-power transformer soft-start method of the present invention may further comprise the steps:
Step S110, when high-power transformer 14 starts, control module 11 produces the first control signal,, control connection disconnects in the second switch module 13 between civil power 15 and the high-power transformer 14, first switch module 12 closures of control connection between current limliting module 10 and high-power transformer 14;
When high-power transformer 14 soft start, control module 11 will produce the first control signal, control first second switch module 13 and be in off-state, control the first switch module 12 again and be in closure state.Thereby civil power 15 is connected with high-power transformer 14 by current limliting module 10, realizes high-power transformer 14 is carried out the power frequency power supply.After the first switch module 12 closures; current limliting module 10 is sampled to its output voltage; and the electric current of sample rate current and setting compared; if sample rate current is greater than the electric current of setting; then carry out current-limiting protection; its output current is adjusted into the setting electric current, so that the output current of current limliting module 10 steadily and remain the current value of setting.
Step S120, at high-power transformer 14 soft starts during to power frequency, control module 11 produces the second control signal, controls the second module 13 closures, control the first module 12 disconnects.
During from the 0Hz soft start to power frequency, control module 11 will produce the second control signal, control first second switch module 13 and be in closure state, control the first switch module 12 again and be in disconnection at high-power transformer 14.Like this in order to guarantee the space between second switch module 13 closures and 12 disconnections of the first switch module, the continued power of high-power transformer 14.
The embodiment of the invention is controlled the cut-off/close of the first switch modules 12 and second switch module 13 by control module 11, and passes through current-limiting circuit so that high-power transformer 14 starts under the condition of current limliting reposefully.Thereby avoided the excessive problem of high-power transformer 14 starting currents, and realized that high-power transformer 14 power frequencies supply power to the automatic switchover between the conversion power supply.
Fig. 6 is the schematic flow sheet of another embodiment of high-power transformer soft-start method of the present invention.
With reference to Fig. 6, on the basis of above-described embodiment, before control module 11 produces the step of the second control signal, also comprise in the present embodiment high-power transformer soft-start method:
Step S130, carry out phase-locked to input voltage and the output voltage of current limliting module 10.
Described phase-locked being specially: detect the input voltage of described current limliting module 10 and the phase difference between the output voltage, and produce error signal; Carry out the adjustment of frequency and phase place according to error signal.
Because at high-power transformer 14 soft starts during to power frequency, to carry out the switching of power frequency power supply and conversion power supply, that same frequency is synchronous by the input voltage of current limliting module 10 and output voltage being carried out phase-locked output voltage can guarantee that the power frequency power supply is switched with conversion power supply the time then, the overcurrent problem of switching moment of having avoided that the phase difference owing to power frequency supply and variable frequency power supply causes guarantees to switch the moment impact electric current very little.
The above only is the preferred embodiments of the present invention; be not so limit its claim; every equivalent structure transformation that utilizes specification of the present invention and accompanying drawing content to do directly or indirectly is used in other relevant technical fields, all in like manner is included in the scope of patent protection of the present invention.
Claims (10)
1. a high-power transformer soft starting device is characterized in that, comprising:
The current limliting module is connected between civil power and the high-power transformer, is used for the starting current of restriction high-power transformer;
Control module is used for producing the first control signal when the high-power transformer soft start, produce the second control signal during to power frequency at the high-power transformer soft start;
The first switch module is connected between current limliting module and the high-power transformer, and is closed according to the first control signal, disconnects according to the second control signal;
The second switch module, in parallel with the current limliting module, disconnect according to the first control signal, closed according to the second control signal.
2. high-power transformer soft starting device according to claim 1 is characterized in that, described control module is used for:
Control first the second switch module by the first control signal and disconnect, control again the first switch module closed;
Control first the second switch module by the second control signal closed, control again the first switch module and disconnect.
3. high-power transformer soft starting device according to claim 1 is characterized in that, described control module is used for: when the second module is in off-state, control the first switch module by the first control signal closed.
4. each described high-power transformer soft starting device in 3 according to claim 1, it is characterized in that, also comprise phase-locked module, in parallel with the current limliting module, be used for before control module produces the second control signal, carry out phase-locked to input voltage and the output voltage of current limliting module.
5. high-power transformer soft starting device according to claim 4 is characterized in that, described current limliting module, phase-locked module and control module are integrated into frequency converter.
6. each described high-power transformer soft starting device in 3 according to claim 1 is characterized in that, also comprise circuit breaker, an end is electrically connected with the city, and the other end is connected with current limliting module, second switch module and phase-locked module respectively.
7. a high-power transformer soft-start method is characterized in that, the method comprising the steps of:
When high-power transformer started, control module produced the first control signal, and control connection disconnects in the second switch module between civil power and the high-power transformer, first switch module of control connection between current limliting module and high-power transformer is closed;
During to power frequency, control module produces the second control signal at the high-power transformer soft start, controls that the second module is closed, control the first module disconnects.
8. high-power transformer soft-start method according to claim 7 is characterized in that, described when high-power transformer starts, control module produces the first control signal, also comprises after connecting the step that is connected between current limliting module and the high-power transformer:
The current limliting module is sampled to its output voltage, and the electric current of sample rate current and setting is compared, if sample rate current then carries out current-limiting protection greater than the electric current of setting, its output current is adjusted into the setting electric current.
9. high-power transformer soft-start method according to claim 7 is characterized in that, described control module also comprises before producing the second control signal:
Input voltage and output voltage to the current limliting module carry out phase-locked.
10. high-power transformer soft-start method according to claim 9 is characterized in that, described phase-locked being specially:
Detect the input voltage of described current limliting module and the phase difference between the output voltage, and produce error signal; Carry out the adjustment of frequency and phase place according to error signal.
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| CN2011102960702A CN103036446A (en) | 2011-09-30 | 2011-09-30 | Soft starting device and method for high-power transformer |
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| CN2011102960702A CN103036446A (en) | 2011-09-30 | 2011-09-30 | Soft starting device and method for high-power transformer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242326A (en) * | 2013-06-18 | 2014-12-24 | 李春明 | Three-phase load balancer |
| CN108270350A (en) * | 2017-01-03 | 2018-07-10 | 沃尔缇夫能源系统公司 | A kind of startup control device and method of pfc circuit |
| CN109818486A (en) * | 2017-11-20 | 2019-05-28 | 维谛技术有限公司 | The hot redundancy control method of frequency converter and redundancy frequency-converter device |
| CN110392469A (en) * | 2019-07-18 | 2019-10-29 | 上海外高桥造船有限公司 | Ship LED illumination System and its soft starting device |
| CN110957721A (en) * | 2019-11-25 | 2020-04-03 | 天津津航计算技术研究所 | Current-limiting starting circuit applied to aviation liquid cooling system |
| CN112737438A (en) * | 2020-12-29 | 2021-04-30 | 顺特电气设备有限公司 | Transformer soft start method and device based on PLC control |
| CN114204532A (en) * | 2021-10-25 | 2022-03-18 | 北京无线电测量研究所 | Distribution circuit for reducing starting impact current of transformer in radar system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490725U (en) * | 2009-09-01 | 2010-05-26 | 合肥阳光电源有限公司 | Buffer grid-connected circuit for transformer of photovoltaic grid-connected inverter |
| CN201594749U (en) * | 2010-01-18 | 2010-09-29 | 东方日立(成都)电控设备有限公司 | Alternating current motor synchronization grid-connected switching device |
| CN102064749A (en) * | 2011-01-11 | 2011-05-18 | 广州智光电气股份有限公司 | Motor soft startup device capable of giving consideration to reactive power compensation and control method thereof |
| JP2011120396A (en) * | 2009-12-04 | 2011-06-16 | Fuji Electric Systems Co Ltd | Synchronous input system of transformer |
-
2011
- 2011-09-30 CN CN2011102960702A patent/CN103036446A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490725U (en) * | 2009-09-01 | 2010-05-26 | 合肥阳光电源有限公司 | Buffer grid-connected circuit for transformer of photovoltaic grid-connected inverter |
| JP2011120396A (en) * | 2009-12-04 | 2011-06-16 | Fuji Electric Systems Co Ltd | Synchronous input system of transformer |
| CN201594749U (en) * | 2010-01-18 | 2010-09-29 | 东方日立(成都)电控设备有限公司 | Alternating current motor synchronization grid-connected switching device |
| CN102064749A (en) * | 2011-01-11 | 2011-05-18 | 广州智光电气股份有限公司 | Motor soft startup device capable of giving consideration to reactive power compensation and control method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242326A (en) * | 2013-06-18 | 2014-12-24 | 李春明 | Three-phase load balancer |
| CN108270350A (en) * | 2017-01-03 | 2018-07-10 | 沃尔缇夫能源系统公司 | A kind of startup control device and method of pfc circuit |
| CN109818486A (en) * | 2017-11-20 | 2019-05-28 | 维谛技术有限公司 | The hot redundancy control method of frequency converter and redundancy frequency-converter device |
| CN109818486B (en) * | 2017-11-20 | 2020-09-29 | 维谛技术有限公司 | Frequency converter thermal redundancy control method and redundancy frequency converter device |
| CN110392469A (en) * | 2019-07-18 | 2019-10-29 | 上海外高桥造船有限公司 | Ship LED illumination System and its soft starting device |
| CN110392469B (en) * | 2019-07-18 | 2022-03-08 | 上海外高桥造船有限公司 | Ship LED lighting system and soft starting device thereof |
| CN110957721A (en) * | 2019-11-25 | 2020-04-03 | 天津津航计算技术研究所 | Current-limiting starting circuit applied to aviation liquid cooling system |
| CN112737438A (en) * | 2020-12-29 | 2021-04-30 | 顺特电气设备有限公司 | Transformer soft start method and device based on PLC control |
| CN114204532A (en) * | 2021-10-25 | 2022-03-18 | 北京无线电测量研究所 | Distribution circuit for reducing starting impact current of transformer in radar system |
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Application publication date: 20130410 |