CN104166418A - Superspeed energy-saving type alternating current voltage stabilizer and control method thereof - Google Patents
Superspeed energy-saving type alternating current voltage stabilizer and control method thereof Download PDFInfo
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- CN104166418A CN104166418A CN201410439118.4A CN201410439118A CN104166418A CN 104166418 A CN104166418 A CN 104166418A CN 201410439118 A CN201410439118 A CN 201410439118A CN 104166418 A CN104166418 A CN 104166418A
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Abstract
The invention discloses a superspeed energy-saving type alternating current voltage stabilizer and a control method thereof. The stabilizer comprises a control unit, a voltage detecting unit, a first electronic switch, a second electronic switch, a commercial power connecting end and a voltage stabilized power source output end. A three-phase line between the commercial power connecting end and the voltage stabilized power source output end is sequentially connected with a first energy storing inductor, current limiting resistors, energy storing capacitors and a second energy storing inductor in series, the two ends of the current limiting resistors are connected with controllable switches respectively in parallel, and the control input ends of the controllable switches are connected with the control unit. The two electronic switches respectively comprise a control input end and three current input ends. The control input ends are connected with the control unit. The current input ends of the first electronic switch are respectively connected to the part between the current limiting resistors and the energy storing capacitors, and the current input ends of the second electronic switch are respectively connected to the part between the energy storing capacitors and the second energy storing inductor. The input end of the voltage detecting unit is connected with the commercial power connecting end and the voltage detecting unit outputs a detected voltage signal to the control unit. The control unit controls the on-off state of the controllable switches, and breakover and cut-off of the first electronic switch and the second electronic switch.
Description
Technical field
The present invention relates to the voltage stabilizing control technology field of the technology such as combined power Electronic Control, microelectronics, high power device design and special power modular design, particularly one is applicable to the unstable place of supply voltage, hypervelocity energy-saving alternating current stable-pressure device and the control method thereof that can automatically adjust to unstable voltage.
Background technology
The terminal electricity consumption of current China is often in spread of voltage state, China's " power supply and business rules " regulation admissible deviation of supply volt-age is to be no more than ratings ± 10%, and the utilization voltage of actual measurement Jiangsu Duo Di enterprise is many in+10% left and right fluctuation daytime, consider that power and voltage are quadratic relationship, if utilization voltage superpressure 10%, if the impedance of load is constant, real power is by overrate 20%.
, there is corresponding voltage stabilizing product in the energy loss bringing for fear of spread of voltage, but traditional voltage stabilizing product is paid attention to voltage stabilizing function more in prior art, itself but will consume electric energy.There is no in the market the product that voltage stabilizing also can save energy simultaneously.Existing common voltage stabilizer is used in voltage-stabilizing and energy-saving aspect and has multinomial defect: the one, and pressure regulation speed is slow, and pressure regulation time >=1 second can not adapt to for the rapid reaction of precision equipment; The 2nd, efficiency is on the low side, generally in 95% left and right, if voltage-stabilizing and energy-saving 5%, the body consumption of only breaking even, and also transformer still has power consumption when unloaded, may also increase power consumption; The 3rd, consume copper material, steel many, weight, volume are very large.
Summary of the invention
The present invention, by the design of power model and corresponding control framework, realizes the automatic adjusting to unstable voltage, object that can also be energy-conservation when reaching high speed pressure regulation.
The technical scheme that the present invention takes is: a kind of hypervelocity energy-saving alternating current stable-pressure device, comprise city's electric connecting terminal and output end of stabilized voltage supply, on the three-phase line between described city electric connecting terminal and output end of stabilized voltage supply, be serially connected with successively the first energy storage inductor, current-limiting resistance, storage capacitor and the second energy storage inductor;
Above-mentioned each current-limiting resistance two ends respectively and be connected to gate-controlled switch;
Also comprise control module, voltage detection unit, the first electronic switch and the second electronic switch; The control input end connection control unit of gate-controlled switch; The first electronic switch and the second electronic switch comprise respectively control input end and three current input terminals, wherein control input end connection control unit, three current input terminals of the first electronic switch are connected in three-phase line between current-limiting resistance and storage capacitor, and three current input terminals of the second electronic switch are connected in three-phase line between storage capacitor and the second energy storage inductor; The input end of voltage detection unit connects city's electric connecting terminal to detect input voltage, then exports the voltage signal detecting to control module; Control module is according to the on off state of voltage signal control gate-controlled switch, and conducting and the cut-off of the first electronic switch and the second electronic switch.
The present invention is in the time of application, and the unstable voltage of civil power input can be automatically adjusted into stable alternating current steady voltage plug and export to threephase load, and voltage stabilizer self power consumption is few, and voltage-regulation is rapid.
Further, the present invention also comprises filter unit, and filter unit is made up of the filter capacitor being serially connected in respectively between output end of pressure-stabilizing three-phase line and common port, can carry out filtering to the high-frequency harmonic in output voltage.
Further, in the present invention, current-limiting resistance is all Anti-surging thermistor.The first electronic switch S1 and the second electronic switch S2 are the adjustable high speed electronic switch integrated chip of existing dutycycle, and its port that has for regulating dutycycle is control input end.Voltage and current measurement unit can utilize existing voltage and current measurement circuit, the electric current and voltage analog quantity recording is converted to digital quantity and is transferred to control module.Control module can be selected existing single-chip microcomputer, and gate-controlled switch can utilize relay auxiliary contact to realize, the power on/off of control module Single-chip Controlling relay coil, thus reach the object of controlling gate-controlled switch break-make.By the measurement of current/voltage, control module can judge the state of voltage stabilizer access power supply, remains open state, and control over time gate-controlled switch closure thereby control gate-controlled switch in the time that power supply access voltage stabilizer starts, thereby by current-limiting resistance short circuit, avoid the electric energy loss on it.
The present invention also provides the control method based on above-mentioned hypervelocity energy-saving manostat, to the control method of the first electronic switch and the second electronic switch be wherein: the input voltage to city's electric connecting terminal detects, and input voltage and set burning voltage compared:
When input voltage equals burning voltage, the conducting of the first electronic switch and the second electronic switch and cut-off dutycycle are set to respectively to 50%; And the first electronic switch is in the time of conducting state, and the second electronic switch is cut-off state;
When input voltage is less than burning voltage, the dutycycle of the first electronic switch is set to be greater than 50%; And the first electronic switch is in the time of conducting state, and the second electronic switch is cut-off state;
When input voltage is greater than burning voltage, the dutycycle of the first electronic switch is set to be less than 50%, and the first electronic switch is in the time of conducting state, and the second electronic switch is cut-off state.
Beneficial effect of the present invention is: be different from traditional voltage stabilizing product: no industrial frequency transformer, thus can make efficiency raising, weight saving improve performance; No-reverse change device, simple in structure, to control flexibly, performance is good; Without controllable silicon, improve power factor, harmonic reduction disturbs.The weight and the size that have significantly reduced voltage stabilizer self, product can be applicable to all electricity consumption occasions that needs voltage stabilizing, is particularly suitable for the occasion that small size is installed, and will bring great economic benefit and social benefit to country simultaneously.
Brief description of the drawings
Figure 1 shows that principle of the invention structural representation block diagram;
Figure 2 shows that a kind of active channel schematic diagram in the course of work of the present invention;
Figure 3 shows that another kind of active channel schematic diagram in the course of work of the present invention;
Figure 4 shows that the third active channel schematic diagram in the course of work of the present invention;
Figure 5 shows that the 4th kind of active channel schematic diagram in the course of work of the present invention;
Figure 6 shows that the conducting sequential schematic diagram of S1 and S2 in control method of the present invention;
Figure 7 shows that the circuit theory diagrams of S1 and S2.
Embodiment
Further illustrate below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, hypervelocity energy-saving alternating current stable-pressure device of the present invention, comprise city electric connecting terminal Us and output end of stabilized voltage supply Uo, on three-phase line between described city electric connecting terminal Us and output end of stabilized voltage supply Uo, be serially connected with successively the first energy storage inductor L1, L2, L3, current-limiting resistance Rt1, Rt2, Rt3, storage capacitor C1, C2, C3, and the second energy storage inductor L4, L5, L6; Each current-limiting resistance two ends respectively and be connected to gate-controlled switch K1, K2, K3; Also comprise control module, voltage detection unit, the first electronic switch S1 and the second electronic switch S2; The control input end of each gate-controlled switch K1, K2, K3 is connection control unit respectively; The first electronic switch S1 and the second electronic switch S2 comprise respectively control input end and three current input terminals, wherein control input end connection control unit, three current input terminals of the first electronic switch S1 are connected between current-limiting resistance Rt1, Rt2 in three-phase line, Rt3 and storage capacitor C1, C2, C3, and three current input terminals of the second electronic switch S2 are connected between storage capacitor C1, C2 in three-phase line, C3 and the second energy storage inductor L4, L5, L6; Voltage detection unit can adopt existing voltage sensor 1 and analog to digital converter 2 to realize, the input end of the voltage sensor 1 in voltage detection unit connects city electric connecting terminal Us to detect input voltage, then convert through analog to digital converter 2 voltage signal detecting to digital signal and export control module 3 to, control module 3 can be selected the miniature control chips such as existing single-chip microcomputer; Control module is according to the on off state of voltage signal control gate-controlled switch K1, K2, K3, and conducting and the cut-off of the first electronic switch S1 and the second electronic switch S2.
Between output end of pressure-stabilizing Uo three-phase line and common port, be also serially connected with filter capacitor C4, C5, C6, composition filter unit, carries out filtering with the high-frequency harmonic in output voltage.On three-phase line between output end of pressure-stabilizing Uo and common port, be connected in series respectively loop resistance R1, R2 and R3.
The present invention is in the time of application, and the unstable voltage of civil power input can be automatically adjusted into stable alternating current steady voltage plug and export to threephase load, and without transformer and the inverter circuit of traditional AC stabilizer, voltage stabilizer self power consumption is few, and voltage-regulation is rapid.
Embodiment
Current-limiting resistance Rt1, Rt2, Rt3 are all Anti-surging thermistor.The first electronic switch S1 and the second electronic switch S2 can adopt the adjustable high speed electronic switch integrated chip of existing dutycycle, and its port that has for regulating dutycycle is control input end.Voltage and current measurement unit can utilize existing voltage and current measurement circuit, the electric current and voltage analog quantity recording is converted to digital quantity and is transferred to control module.Control module can be selected existing single-chip microcomputer, and gate-controlled switch K1, K2, K3 can utilize relay auxiliary contact to realize, the power on/off of control module Single-chip Controlling relay coil, thus reach the object of controlling gate-controlled switch break-make.By the measurement of current/voltage, control module can judge the state of voltage stabilizer access power supply, remains open state, and control over time gate-controlled switch closure thereby control gate-controlled switch in the time that power supply access voltage stabilizer starts, thereby by current-limiting resistance short circuit, avoid the electric energy loss on it.
The method that the first electronic switch in hypervelocity energy-saving manostat of the present invention and the second electronic switch are controlled is: the input voltage to city electric connecting terminal Us detects, and input voltage and set burning voltage are compared, this burning voltage can artificially be determined according to the electric pressure of voltage stabilizer practical application, then utilize voltage comparator to realize the comparative result output of two magnitudes of voltage, comparative result exports to after control module single-chip microcomputer, and single-chip microcomputer can be according to conducting and the cut-off of comparative result control electronic switch; Or after being converted into digital signal, input voltage inputs to single-chip microcomputer, compare with the set burning voltage that in advance writes single-chip microcomputer by software, and then acquisition comparative result, control electronic switch conducting or cut-off, said method all can utilize existing software engineering to realize.
Please refer to Fig. 7, electronic switch S1 of the present invention, S2 also can adopt diagram circuit theory, and each electronic switch module is made up of three groups of turn-off thyristor GTO, and GTO also can substitute with the existing controlled power device such as IGBT or MCT, IGCT.Every group oppositely and in the turn-off thyristor GTO connecing, the gate pole 1-6 of 6 GTO is the control end of electronic switch, the port of corresponding electronic switch 1.-6.; Residue the two poles of the earth one utmost point of GTO is for connecting respectively a phase of three-phase line, port 7.-9.; Ground connection after three groups of another utmost points join, port 10..For the electronic switch shown in Fig. 7, be prior art thereby regulate the method for dutycycle size by the turn-on and turn-off time of control 6 GTO wherein.
Please refer to Fig. 6, the present invention to the concrete control method of electronic switch is:
When input voltage equals burning voltage, the conducting of the first electronic switch and the second electronic switch and cut-off dutycycle are set to respectively to 50%;
When input voltage is less than burning voltage, the first electronic switch dutycycle is set to be greater than 50%;
When input voltage is greater than burning voltage, the first electronic switch dutycycle is set to be less than 50%;
And under above-mentioned three kinds of control methods, the first electronic switch is in the time of conducting state, and the second electronic switch is cut-off state.
Control principle of the present invention is specially: that mains electricity input end is inputted is unsettled three-phase mains voltage Us, current-limiting resistance Rt1, Rt2, Rt3 are existing special Anti-surging thermistors, for prevent that electric current is too high in the time starting, play the effect of current limliting, after startup finishes, make its current-limiting resistance Rt1, Rt2, Rt3 short circuit by control module control gate-controlled switch K1-K3 closure.S1 and S2 are existing high speed electronic switch device chips, within 0.02 second cycle of three-phase mains voltage (50 hertz of power frequencies), and S1 and the conducting of S2 high frequency or cut-off.
At the T of S1
oNduring (conducting), S2 cut-off simultaneously, three-phase supply passes through inductance L
1, L
2, L
3form loop with S1, taking A phase loop as example, as shown in Figure 2, now:
Supply voltage U
s1all be added in inductance L
1upper, so L
1on pressure drop be U
s1, can obtain according to Faraday's electromagnetic induction law:
Through T
oNafter time, L
1on current increment be:
(in formula,
for S1 dutycycle, T
s=T
oN+ T
oFFfor turn-on cycle).
And at the T of S1
oFFduring (cut-off), S2 conducting simultaneously, three-phase supply passes through inductance L
1, L
2, L
3, capacitor C
1, C
2, C
3form loop with S2, taking A phase loop as example, as shown in Figure 3, now:
L
1on pressure drop be:
Can obtain:
Through T
oFFafter time, L
1on current increment be:
(in formula,
for the dutycycle of S1 conducting, T
s=T
oN+ T
oFFfor turn-on cycle).
According to steady state conditions: Δ i
l1 (ON)=| Δ i
l1 (OFF)|
Can obtain:
Can obtain by abbreviation:
1.
Further, consider output loop, taking A mutually as example: at the T of next S1
oNduring (conducting), S2 cut-off simultaneously, S1, C
1, L
4with load R
1form a path, as shown in Figure 4, now:
L
4on pressure drop be: U
l4=U
c1-U
o1
Can obtain:
Through T
oNafter time, L
4on current increment be:
And at the T of next S1
oFFduring (cut-off), S2 conducting simultaneously, S2, L
4with load R
1form a path, as shown in Figure 5, now:
L
4on pressure drop be:
Through T
oFFafter time, L
4on current increment be:
Due to the conducting at S2 with between the off period, inductance L
4on electric current can not undergo mutation, so exist steady state conditions to be: Δ i
l4 (ON)=| Δ i
l4 (OFF)|
So,
Can obtaining of solution:
②
(in formula,
for the dutycycle of S1 conducting, T
s=T
oN+ T
oFFfor turn-on cycle).
Will be 1. formula substitution 2. formula solve:
Therefore work as D
1=50% time, U
o1=U
s1
D
1when >50%, U
o1> U
s1
D
1when <50%, U
o1< U
s1
In other words:
In the time that input voltage equals burning voltage, by D
1be set to equal 50%, can realize voltage stabilizing;
In the time that input voltage is less than burning voltage, by D
1be set to be greater than 50%, can realize voltage stabilizing;
In the time that input voltage is greater than burning voltage, by D
1be set to be less than 50%, can realize voltage stabilizing.
D
1the occurrence arranging can be by detecting current input voltage, then based on experience value or actual needs arrange, only need meet the above-mentioned condition that arranges.
Adopt structure of voltage regulation of the present invention and control method, without adopting traditional transformer or inverter, only need, by the high speed electronic switch S1 of change and the dutycycle of S2, can make output voltage reach burning voltage, and electronic speed regulation than mechanical speed governors sooner, more accurate, weight is lighter.
Claims (4)
1. a hypervelocity energy-saving alternating current stable-pressure device, comprise city's electric connecting terminal and output end of stabilized voltage supply, it is characterized in that, on the three-phase line between described city electric connecting terminal and output end of stabilized voltage supply, be serially connected with successively the first energy storage inductor, current-limiting resistance, storage capacitor and the second energy storage inductor;
Above-mentioned each current-limiting resistance two ends respectively and be connected to gate-controlled switch;
Also comprise control module, voltage detection unit, the first electronic switch and the second electronic switch; The control input end connection control unit of gate-controlled switch; The first electronic switch and the second electronic switch comprise respectively control input end and three current input terminals, wherein control input end connection control unit, three current input terminals of the first electronic switch are connected in three-phase line between current-limiting resistance and storage capacitor, and three current input terminals of the second electronic switch are connected in three-phase line between storage capacitor and the second energy storage inductor; The input end of voltage detection unit connects city's electric connecting terminal to detect input voltage, then exports the voltage signal detecting to control module; Control module is according to the on off state of voltage signal control gate-controlled switch, and conducting and the cut-off of the first electronic switch and the second electronic switch.
2. hypervelocity energy-saving alternating current stable-pressure device according to claim 1, is characterized in that, also comprise filter unit, filter unit is made up of the filter capacitor being serially connected in respectively between output end of pressure-stabilizing three-phase line and common port.
3. hypervelocity energy-saving alternating current stable-pressure device according to claim 1, is characterized in that, described current-limiting resistance is all Anti-surging thermistor.
4. the control method of the hypervelocity energy-saving alternating current stable-pressure device based on described in claims 1 to 3 any one, is characterized in that, to the control method of the first electronic switch and the second electronic switch is:
Input voltage to city's electric connecting terminal detects, and the input voltage detecting and set burning voltage are compared:
When input voltage equals burning voltage, the conducting of the first electronic switch and the second electronic switch and cut-off dutycycle are set to respectively to 50%;
When input voltage is less than burning voltage, the dutycycle of the first electronic switch is set to be greater than 50%;
When input voltage is greater than burning voltage, the dutycycle of the first electronic switch is set to be less than 50%;
And when the first electronic switch is during in conducting state, the second electronic switch is cut-off state.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693907A (en) * | 2018-05-04 | 2018-10-23 | 兰州智豆信息科技有限公司 | Digital buck alternating current steady voltage plug |
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| CN104166418B (en) | 2015-11-18 |
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Effective date of registration: 20201224 Address after: No.18 Runxin Avenue, Xinqiao Town Industrial Park, Jingjiang City, Taizhou City, Jiangsu Province Patentee after: JIANGSU HUAYANG ELECTRIC POWER MACHINERY MANUFACTURING Co.,Ltd. Address before: No. 99 Jiangning Road, Nanjing District hirokage 211169 cities in Jiangsu Province Patentee before: JINLING INSTITUTE OF TECHNOLOGY |
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