CN2300940Y - Quick thyristor-controlled voltage-stabilizer - Google Patents
Quick thyristor-controlled voltage-stabilizer Download PDFInfo
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- CN2300940Y CN2300940Y CN 97218138 CN97218138U CN2300940Y CN 2300940 Y CN2300940 Y CN 2300940Y CN 97218138 CN97218138 CN 97218138 CN 97218138 U CN97218138 U CN 97218138U CN 2300940 Y CN2300940 Y CN 2300940Y
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Abstract
The utility model relates to a Quick thyristor-controlled voltage stabilizer which is suitable to high-capacity users having higher requirements to the voltage quality in a power distribution system. A voltage stabilizer cabinet is composed of a parallel transformer formed by a plurality of secondary side windings, a series transformer, a thyristor valve body, a control cabinet, a contactor, a knife switch, etc. The utility model is characterized in that the secondary side windings of the shunt transformer are connected with the thyristor valve body; the numbers between each two turns of the windings have a triple relation; each secondary side winding is connected with a thyristor group; the output ends of all the thyristor groups are connected in series; the head end and the tail end are connected with the secondary side of the series transformer. The utility model has the advantages of high speed of constant voltage modulation, operation without maintenance, low cost, etc.
Description
The utility model relates to the quick voltage stabilizer of a kind of thyristor-controlled, is applicable to high capacity (tens peaces are to several kilo-amperes) user who in the distribution system quality of voltage is had relatively high expectations, as hospital, computing center, large-scale hotel, hotel, sophisticated product factory etc.
Large-scale voltage stabilizer in the market is the mechanical voltage stabilizer of driven by motor slidding carbon brush, and its pressure regulation speed needs about one minute slowly, can't suppress the low-frequency voltage fluctuation of electric system, and need overhaul once half a year, and is pretty troublesome; The voltage stabilizer that adopts thyristor to make switch is also arranged, only for being used for the low capacity voltage stabilizer of a few peace to tens peaces; Also have and a kind ofly as Fig. 1 designed large-scale electronic regulator is shown (Fig. 1 is single-phase because of required transformer number is too many, three-phase then has nine transformers, then need 18 transformers as bi-directional voltage stabilizing) and higher to the thyristor requirement of withstand voltage, so cost is too high, thereby can't come into operation.
In order to address the above problem, the utility model provides that a kind of voltage-regulation speed is fast, the precision of voltage regulation is high, can protect consumer, the quick voltage stabilizer of non-maintaining thyristor-controlled.
The purpose of this utility model is achieved in that the utility model comprises that by shunt transformer, series transformer, the thyristor valve body of the many windings of secondary side heat radiator, control cabinet, contactor, disconnecting link etc. form the voltage stabilizer cabinet.Finish sampling, calculating, a control signal of voltage, electric current by the single-chip computer control system in the control cabinet; Be characterized in, the number of turn of the secondary side winding of shunt transformer is that three times of last tap voltage are provided with by back one tap voltage, as be three windings, then the ratio of its umber of turn or tap voltage is 1: 3: 9, and each secondary side winding connects a thyristor group, after the serial connection, its initial and end end is connected with the series transformer secondary side between the thyristor group.
The large-scale electronic regulator electrical schematic of Fig. 1 for designing in the prior art, Fig. 2, Fig. 3, Fig. 4 are A phase control circuit schematic diagrams (the identical A phase of B, C) in the control cabinet, and Fig. 5 is the electrical schematic of an embodiment of the utility model.
In conjunction with the accompanying drawings circuit structure of the present utility model and embodiment are described as follows: the utility model is formed the voltage stabilizer cabinet by the three-winding shunt transformer T2 of secondary side, series transformer T1, thyristor valve body, control cabinet, contactor (K1, K2) and disconnecting link D1.
Control has in the cabinet: 1) A phase signals modulate circuit A (B, C circuitry phase are with the A phase), and by the ratio amplifying circuit, second-order active filter circuit, phase-shift circuit, comparator circuit and the three plate pipes that convert square wave to are formed; 2) sample circuit B is made up of multicircuit switch AD7506, voltage follower LM310,12 A/D change-over circuit AD1674; 37,8031 cpu control circuit D, by single-chip microcomputer 8031, address assignment 74LS138, address wire latch 74L373, RAM6116, EPROM2764 forms; 4) control series connection and bypass contactor circuit E are made up of phase inverter, power discharging transistor, relay (J1, J2); 5) A phase thyristor triggering logical circuit F (B, C circuitry phase are with the A phase) is reached with door or door by data latches 74LS273, phase inverter 74LS04, single steady signal generator 74LS221 and forms; Thyristor gating circuit C is by resistance R C1, RC2, RC3, RC4, signal transformer TC, two common power triodes, static voltage sharing RB2, and dynamic voltage balancing RB1 and CB form; RB2 and RB1, CB shield;
Characteristics of the present utility model are the main electrical scheme circuit of voltage stabilizer, referring to Fig. 5, the number of turn of the secondary side winding of shunt transformer T2 is that three times of last tap voltage are provided with by back one tap voltage, the quantity of shunt transformer T2 secondary side winding is 1-6, each secondary side winding connects an identical thyristor group, each thyristor group is made of four groups of thyristors, every group of two thyristor SCR that comprise reverse setting, (1,3), (2,4) two groups in parallel again after connecting respectively, its output terminal is respectively (a, b), (c, d), (e, f), only show e among the figure, the f two ends, the top and bottom of each secondary side winding are respectively with (1,3), (2,4) mid point of group connects, be connected in series between thyristor group's output terminal, its head, tail end (a, f) secondary side with series transformer T1 is connected, former limit one end of shunt transformer T2, series transformer T1 links by disconnecting link D1 and former avris (bus bar side) L, the other end ground connection of T2, disconnecting link D1, contactless contactor K2 connects with T1, bypass contactor K switch 1 and D1, T1, the K2 parallel connection, L ' forms for load side.
U1 can take from former avris or load side; Can require to design shunt transformer, the former and deputy limit of series transformer no-load voltage ratio, choose thyristor according to pressure regulation; The quick voltage stabilizer of thyristor-controlled can be made into single-phase, also can be made into three-phase.
In conjunction with the accompanying drawings principle of work of the present utility model is described as follows:
1, the principle of work of control cabinet
1) A phase signals modulate circuit A (B, C are mutually identical with A):
UAIN, UA2IN, IAIN are for going into end signal, and they are respectively former avris L sampled voltage, load side L ' sampled voltage and the load side sample rate current of voltage stabilizer from PT1, PT2, CT.UAIN produces signal UA through ratio amplifying circuit 1, second-order active filter circuit 2.UA converts the square wave AC U-of 5V to again through phase-shift circuit 3, comparator circuit 4 by triode.UA2IN produces signal UA2 through ratio amplifying circuit 5, second-order active filter circuit 6.IAIN produces signal CURRENTA through ratio amplifying circuit 7, second-order active filter circuit 8.CURRENTA converts the square wave AC I-FORCE of 5V to again through phase-shift circuit 9, comparator circuit 10 by triode; Through phase-shift circuit 11, comparator circuit 12, convert the square wave AC I-BACK of 5V again to by triode.Phase place is identical with the A phase voltage.The little A phase current that is ahead of of ACI-FORCE phase place.The little A phase current that lags behind of ACI-BACK phase place.
UA, UA2, CURRENTA are admitted to circuit B, use for sampling; ACU-, ACI-FORCE, ACI-BACK are admitted to circuit F, are used to generate different trigger pips.
2) sample circuit B:
AD7506 is a multicircuit switch, and its controlled end A0-A3 is from circuit D.LM310 is a voltage follower, is used to reduce the internal resistance of output signal.AD1674 is 12 A/D change-over circuits.
UA, CURRENTA, UA2 are successively by gating, and process LM310 enters 13 pins of AD1674, and 6 pins of AD1674 start sampling, and sampling back data are delivered to 8031 single-chip microcomputers by the D0-D7 data line.
3) 8031 cpu control circuit D:
8031 control system latch 74LS373, RAM 6116 by single-chip microcomputer 8031, address assignment 74LS138, address wire, and EPROM 2764 forms.
The pin Y0 of 74LS138 is used for gating 6116, and Y1 is used for gating 74LS273 and sends control data, and Y4 is used for gating AD1674, and Y5 is used for gating 74LS174, and the data line of 74LS174 is delivered to AD7506.
8031 Single-chip Controlling samplings, and deal with data, the calculating voltage deviation, and send the conduction mode that the relative trigger control signal is controlled thyristor according to voltage deviation, thus change the size of bucking voltage Δ U (see figure 5), reach the purpose of burning voltage.
4) control series connection and bypass contactor circuit E:
P1.0, P1.1 are from 8031 single-chip microcomputers, and through driving relay J 1, J2 respectively after the triode power amplification, J1 controls K1, and J2 controls K2 (K1, K2 see Fig. 5).
5) A phase thyristor triggers logical circuit F (B, C are mutually identical with A).
The output signal of 74LS273 is anti-phase through 74LS04, obtains AT1-2 to AT23-24 totally 12 signals altogether.The corresponding one group of thyristor (containing two of the opposite thyristors of direction) of each signal.The Q7 of 74LS273, Q8 are used for control to be triggered, and logical relation sees the following form.
| Q7 | Q8 | Triggering mode | Remarks |
| Q7=0 (AU-OR-I=1) | Q8=1 or 0 | Voltage triggered | Half-wave triggers.Current zero-crossing point is indeterminate at the beginning of powering on or during little electric current, adopts this mode. |
| Q7=1 (AI-OR-U=1) | Q8=1 (ACT-FB=1) | Electric current triggers in advance | Short pulse triggers.Adopt when the thyristor conduction mode is constant, can improve output waveform. |
| Q7=1 (AI-OR-U=1) | Q8=0 (ACT-FB=0) | Trigger after the current hysteresis | Short pulse triggers.Adopt during the conversion of thyristor conduction mode, can prevent the T1 short circuit in winding. |
74LS221 produces broad-adjustable single steady signal, the width of the trigger pulse under its decision current trigger mode.Signal ACT-T, ACT+T are respectively applied for and trigger opposite two thyristors (according to voltage or direction of current, guaranteeing at the corresponding thyristor of a respective direction conducting) of direction in one group of thyristor.ACT1 to ACT24 is the last triggering control signal that generates.
2, the principle of work of thyristor valve body:
Circuit C is the trigger circuit of valve body, and the voltage stabilizer main wiring diagram is seen Fig. 5.
RC1, RC2, RC3, RC4, signal transformer TC, two triodes are formed trigger circuit.RB2 is used for static state voltage equipoise, and RB1, CB are used for dynamic voltage balancing.ACT1 to ACT24 is from the F circuit.
Shunt transformer secondary side tap voltage is by U21: U22: U23=1: mode designed secondary side if any four windings in 3: 9, and then the order voltage ratio is 1: 3: 9: 27.Thyristor groups has three kinds of effective conduction modes, as shown in the figure: 1,3 conductings (or 2,4 conductings); 2,3 conductings; 1,4 conductings.Relatively Δ U21=0 ,-U21 ,+U21 should be arranged; Δ U22=0 ,-U22 ,+U22; Δ U23=0 ,-U23 ,+U23.And Δ U2=Δ U21+ Δ U22+ Δ U23.(U22, U23 replacement is 3 * U21,9 * U21), and the voltage jump is U21 to+13 * U21 so voltage Δ U2 just can form the contact potential series on rank such as multipole :-13 * U21.Voltage Δ U2 is added to by series transformer on the busbar voltage, uses for load.
The series contactor K2--automatic voltage regulation of closing automatically that the voltage stabilizer course of work is: close disconnecting link and power on--work of control cabinet--.Disconnect series contactor K2 during fault, contactor K1 in parallel closes.
Advantage of the present utility model: owing to adopt the thyristor control voltage stabilizing, so voltage-regulation speed only needs 20ms soon, the low-frequency voltage fluctuation in the power system of energy establishment, the precision of voltage regulation is higher; The protection consumer; Can non-maintainingly move; Cost is not high.
Claims (3)
1, the quick voltage stabilizer of a kind of thyristor control, shunt transformer (T2) by the many windings of secondary side, series transformer (T1), thyristor valve body, the controller case comprises: 1) A phase signals modulate circuit (A) is by proportional amplifier, the second-order active filter circuit, phase-shift circuit, comparator circuit and triode are formed; 2) sample circuit (B) is by multicircuit switch (AD7506), voltage follower (LM310), and 12 A/D change-over circuits (AD1674) are formed; 3) 8031CPU control circuit (D) is by single-chip microcomputer (8031), address assignment (74LS138), and address wire latchs (74LS373), (RAM6116), (EPROM2764) forms; 4) control series connection and bypass contactor circuit (E) by phase inverter, power discharging transistor, relay (J1, J2) is formed; 5) thyristor triggers logical circuit F by data latches (74LS273), and reverser (74LS04), single steady signal generation circuit (74LS221) reach with door or door to be formed; Thyristor gating circuit (C) is by resistance (RC1, RC2, RC3, RC4), signal transformer (TC), two power discharging transistors, static voltage sharing (RB2), dynamic voltage balancing (RB1) reaches (CB) to be formed, contactor (K1, K2) and disconnecting link (D1) form the voltage stabilizer cabinet, it is characterized in that, the main electrical scheme circuit of voltage stabilizer is that three times of last tap voltage are provided with by the number of turn of the secondary side winding of shunt transformer (T2) by back one tap voltage, each secondary side winding connects an identical thyristor group, each thyristor group is made of four groups of thyristors, every group of two thyristor SCR that comprise reverse setting, (1,3), (2,4) two groups in parallel again after connecting respectively, its output terminal is respectively (a, b), (c, d), (e, f), the top and bottom of each secondary side winding are respectively with (1,3), (2,4) mid point of group connects, be connected in series between thyristor group's output terminal, its head, tail end (a, f) secondary side with series transformer (T1) is connected, former limit one end of shunt transformer (T2), series transformer (T1) links by disconnecting link (D1) and former avris (L), (T2) other end ground connection, disconnecting link (D1), contactless contactor (K2) is connected with (T1), bypass contactor switch (K1) with (D1), (T1), (K2) parallel connection, L ' forms for load side.
By the described voltage stabilizer of claim 1, it is characterized in that 2, the quantity of shunt transformer secondary side winding is 1-6.
3, by claim 1 or 2 described voltage stabilizers, it is characterized in that this voltage stabilizer can be made into single-phase voltage stabilizer, also can be made into the three-phase voltage stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97218138 CN2300940Y (en) | 1997-06-02 | 1997-06-02 | Quick thyristor-controlled voltage-stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97218138 CN2300940Y (en) | 1997-06-02 | 1997-06-02 | Quick thyristor-controlled voltage-stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2300940Y true CN2300940Y (en) | 1998-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97218138 Expired - Fee Related CN2300940Y (en) | 1997-06-02 | 1997-06-02 | Quick thyristor-controlled voltage-stabilizer |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101447672A (en) * | 2008-09-22 | 2009-06-03 | 陈甲标 | Novel full frequency spectrum electrical active filter |
| CN102035523A (en) * | 2011-01-12 | 2011-04-27 | 上海三基电子工业有限公司 | High-voltage heavy-current electronic switch |
| CN102368665A (en) * | 2011-12-01 | 2012-03-07 | 西安爱科电子有限责任公司 | Voltage stabilizer without harmonic pollution and with instant output voltage dip and voltage stabilization method |
| CN102638173A (en) * | 2012-04-10 | 2012-08-15 | 四川大学 | Isolated constant amplitude vector alternating current voltage regulator |
| CN101453106B (en) * | 2007-11-30 | 2012-10-31 | 北京市电力公司 | Solid converting switch and reinforced switching method for thyristor valve body |
| CN103199522A (en) * | 2013-02-25 | 2013-07-10 | 中国电力科学研究院 | Controllable phase shifter used for super /extra-high voltage circuit and parameter design method thereof |
| CN103427414A (en) * | 2013-06-13 | 2013-12-04 | 国家电网公司 | Parameter design method of symmetrical controllable phase shifter |
| WO2014127664A1 (en) * | 2013-02-25 | 2014-08-28 | 国家电网公司 | Controllable phase shifter for extra/ultra high voltage line and operating method thereof |
| CN104124875A (en) * | 2014-08-06 | 2014-10-29 | 龚秋声 | Single-phase and three-phase chopping power-variable compensation alternating-current regulated power supply |
| CN106410948A (en) * | 2016-11-17 | 2017-02-15 | 江西科旺科技有限公司 | Dry type wide-range voltage stabilizer |
| CN107591812A (en) * | 2017-09-30 | 2018-01-16 | 国网江西省电力公司电力科学研究院 | A kind of step voltage regulator applied to power distribution network |
| CN107732919A (en) * | 2017-09-07 | 2018-02-23 | 武汉天富海科技发展有限公司 | A kind of contactless automatic pressure regulating device |
-
1997
- 1997-06-02 CN CN 97218138 patent/CN2300940Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453106B (en) * | 2007-11-30 | 2012-10-31 | 北京市电力公司 | Solid converting switch and reinforced switching method for thyristor valve body |
| CN101447672A (en) * | 2008-09-22 | 2009-06-03 | 陈甲标 | Novel full frequency spectrum electrical active filter |
| CN102035523A (en) * | 2011-01-12 | 2011-04-27 | 上海三基电子工业有限公司 | High-voltage heavy-current electronic switch |
| CN102035523B (en) * | 2011-01-12 | 2012-11-21 | 上海三基电子工业有限公司 | High-voltage heavy-current electronic switch |
| CN102368665A (en) * | 2011-12-01 | 2012-03-07 | 西安爱科电子有限责任公司 | Voltage stabilizer without harmonic pollution and with instant output voltage dip and voltage stabilization method |
| CN102638173A (en) * | 2012-04-10 | 2012-08-15 | 四川大学 | Isolated constant amplitude vector alternating current voltage regulator |
| CN103199522A (en) * | 2013-02-25 | 2013-07-10 | 中国电力科学研究院 | Controllable phase shifter used for super /extra-high voltage circuit and parameter design method thereof |
| WO2014127664A1 (en) * | 2013-02-25 | 2014-08-28 | 国家电网公司 | Controllable phase shifter for extra/ultra high voltage line and operating method thereof |
| CN103199522B (en) * | 2013-02-25 | 2015-11-18 | 华北电力大学 | A kind of controllable phase shifter for ultra-high/extra-high voltage circuit and Parameters design thereof |
| CN103427414A (en) * | 2013-06-13 | 2013-12-04 | 国家电网公司 | Parameter design method of symmetrical controllable phase shifter |
| CN103427414B (en) * | 2013-06-13 | 2015-08-19 | 国家电网公司 | A kind of Parameters design of symmetric form controllable phase shifter |
| CN104124875A (en) * | 2014-08-06 | 2014-10-29 | 龚秋声 | Single-phase and three-phase chopping power-variable compensation alternating-current regulated power supply |
| CN106410948A (en) * | 2016-11-17 | 2017-02-15 | 江西科旺科技有限公司 | Dry type wide-range voltage stabilizer |
| CN107732919A (en) * | 2017-09-07 | 2018-02-23 | 武汉天富海科技发展有限公司 | A kind of contactless automatic pressure regulating device |
| CN107591812A (en) * | 2017-09-30 | 2018-01-16 | 国网江西省电力公司电力科学研究院 | A kind of step voltage regulator applied to power distribution network |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |