CN104505842A - Zero-crossing triggering circuit based on bidirectional silicon-controlled switch - Google Patents
Zero-crossing triggering circuit based on bidirectional silicon-controlled switch Download PDFInfo
- Publication number
- CN104505842A CN104505842A CN201410783661.6A CN201410783661A CN104505842A CN 104505842 A CN104505842 A CN 104505842A CN 201410783661 A CN201410783661 A CN 201410783661A CN 104505842 A CN104505842 A CN 104505842A
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- zero
- silicon
- signal
- optocoupler
- triggering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses a zero-crossing triggering circuit based on a bidirectional silicon-controlled switch, including an input end for obtaining voltages signals of two ends of a silicon-controlled switch, and an output end for sending a zero-crossing triggering signal to the silicon-controlled switch, wherein a bridge type circuit for performing full-wave rectification on the voltages signals of two ends of the silicon-controlled switch, a first optocoupler for feeding the voltage signals back to a CPU (Central Processing Unit), a second optocoupler for performing level conversion on the voltages signals of two ends of the silicon-controlled switch to generate a corresponding preliminary zero-crossing pulse signal, a comparison amplifier for generating a silicon-controlled zero crossing point triggering signal, a gating element for performing AND on the zero crossing point triggering signal and a capacitor switch triggering signal sent by a process tuning CPU, and a driver for generating a silicon-controlled zero-crossing trigger driving signal are sequentially arranged between the input end and the output end. According to the zero-crossing triggering circuit, the silicon-controlled switch can be turned on by generating the triggering signals at the voltage zero crossing points of two ends of the bidirectional silicon-controlled switch; and the tuning transition process of a system can be stably completed by switching a capacitor in a system tuning process.
Description
Technical field
The present invention relates to power system reactive power compensation circuit, be specifically related to the zero-cross triggering circuit based on bidirectional triode thyristor.
Background technology
Because the voltage at capacitor two ends is undergone mutation, can produce and shove and series of harmonic.In the current circuits for triggering based on bidirectional triode thyristor capacitor tuning type (TSC) arc suppression coil, the method of shoving of suppression capacitor switching moment and harmonic wave is carried out by series reactor, namely when system switched capacitor is tuning, improve reactance Rate by series reactor and come shoving of suppression capacitor generation and corresponding harmonic wave, make the corresponding decline of the capacity of arc suppression coil compensation switching capacitance, the installation cost of this compensation method is high, noise is large, take volumetric spaces large, simultaneously, tuning compensation arrangement needs again to carry out switching to same capacitor, the electric discharge stand-by period is set, the general stand-by period is 3 ~ 5min.
Summary of the invention
The object of the invention is to for above-mentioned defect of the prior art, there is provided a kind of structure simple, by system switching to capacitor in tuning process, the voltage at capacitor two ends is remained unchanged in system tunning process, the tuned transient of completion system, can make the zero-cross triggering circuit based on bidirectional triode thyristor that cost reduces.
To achieve these goals, the technical solution used in the present invention is: comprise the input for obtaining bi-directional thyristor switch both end voltage signal, and sends the output of zero cross fired signal to bidirectional triode thyristor;
Be disposed with between described input and output:
For carrying out the bridge circuit of full-wave rectification to controllable silicon both end voltage signal;
For voltage signal being fed back to first optocoupler of device CPU;
For carrying out level translation to controllable silicon both end voltage signal, produce the second optocoupler of corresponding preliminary zero-crossing pulse signal;
For generation of the comparison amplifier of silicon control zero-cross point triggering signal;
For capacitor switching triggering signal phase that zero crossing triggering signal and tuning process CPU are sent and gating element;
For generation of the driver of bidirectional triode thyristor zero cross fired drive singal.
Described input bi-directional thyristor switch both end voltage signal keeps synchronous with tuning power supply signal.
The first resistance for decaying respectively to bi-directional thyristor switch both end voltage signal and the second resistance is provided with between described input and bridge circuit.
Described bridge circuit rear end is provided with the electric capacity for carrying out High frequency filter.
The first described optocoupler front end is provided with the diode preventing optocoupler reverse breakdown and ensure reverse-conducting afterflow.
Described comparison amplifier front end is provided with the adjusting resistance triggering pulse duty factor for changing silicon control zero-cross point.
Described comparison amplifier selects AR8541AR, AR8542AR or AR8544AR.
Described driver adopts MOC3021 controllable silicon to export and drives optocoupler; The first described optocoupler and the second optocoupler adopt TLP281 optocoupler.
Compared with prior art, the voltage over zero of the present invention at bi-directional thyristor switch two ends produces triggering signal, make reverse-blocking tetrode thyristor conducting, by switched capacitor in system tunning process, the voltage at capacitor two ends is remained unchanged, the tuned transient of completion system can be stablized, what inhibit switching to produce shoves and harmonic wave, do not need series reactor, also not by the restriction of switching electric discharge stand-by period in system tunning process, the switching time interval is no more than a power frequency component cycle, electric power system can be reached from motion tracking and the object of real-time tuning compensation, meet the application of small current line selection, simplify tuner, cost can be made to reduce.
Further, the present invention passes through the decay of the first resistance and the second resistance, makes the voltage signal at input bi-directional thyristor switch two ends and tuning power supply signal keep synchronous.
Further, bridge circuit rear end of the present invention is provided with the electric capacity for carrying out High frequency filter, can effectively reject misleading of optocoupler.
Further, the present invention first optocoupler front end is provided with and prevents optocoupler reverse breakdown and the diode ensureing reverse-conducting afterflow, and the voltage signal of circuit zero crossing can reliably be obtained.
Accompanying drawing explanation
Fig. 1 circuit connection diagram of the present invention;
Fig. 2 line parts test waveform of the present invention figure;
In accompanying drawing: the voltage acquisition terminals of KK, KK-bi-directional thyristor switch; G11. the first output; G12. the second output; D300. bridge circuit; U300A. the first optocoupler; U300B. the second optocoupler; U301. comparison amplifier; U302. gating element; U303. driver; R300. the first resistance; R301. the second resistance; C300. electric capacity; D301. diode; R306. adjusting resistance.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See Fig. 1, binding post signal instruction of the present invention: positive input terminal KK1+, negative input end KK1-take from the voltage signal of bidirectional triode thyristor BTSC two ends T1, T2, bidirectional triode thyristor zero cross fired drive singal delivers to triggering signal end G1, G2 of bidirectional triode thyristor through the first output G11, the second output G12; DIN1 is the feedback signal of bidirectional triode thyristor operating state, directly delivers to the I/O pin of device CPU, and DOU1, from the switching signal of CPU, triggers controlled silicon conducting, switching capacitance apparatus.
The generative process of signal of the present invention illustrates:
1) acquisition of reverse-blocking tetrode thyristor both end voltage waveform and rectification: the voltage signal being obtained reverse-blocking tetrode thyristor two ends by positive input terminal KK+, negative input end KK-, decayed by resistance first resistance R300, the second resistance R301, enter bridge circuit D300 and carry out full-wave rectification.The waveform produced by bridge circuit is as shown in a waveform in Fig. 2.
2) feedback of reverse-blocking tetrode thyristor transformation state: isolated by the first optocoupler U300A, through the high-frequency signal that magnetic bead BLM21A601R absorption system produces, the voltage signal DIN1 at bi-directional thyristor switch two ends is fed back to device CPU, its waveform is as shown in the b waveform in Fig. 2, when there is high level pulse at DIN1 two ends, reverse-blocking tetrode thyristor is in off-state; When it does not have high level, reverse-blocking tetrode thyristor is in closure state.Electric capacity C300 realizes carrying out filtering to the high-frequency signal of returning, and diode D301 protects optocoupler reverse breakdown.
3) generation of crossover point signal: the signal at reverse-blocking tetrode thyristor two ends carries out level translation by the second optocoupler U300B, produce corresponding preliminary zero-crossing pulse signal, as shown in the c waveform in Fig. 2, and export from E01 point, this signal enters the in-phase input end of comparison amplifier U301 by resistance R307, compare with the signal of reverse input end, produce silicon control zero-cross point triggering signal, its crossover point signal waveform exported is as shown in the d waveform in Fig. 2, regulate the resistance of adjusting resistance R306 as required, the duty ratio of zero passage trigger impulse can be changed.
4) export and drive triggering signal: the triggering signal that the crossover point signal and the tuner that export from comparison amplifier U301 send through with gating element U302 phase with, under the effect of driver U303, generation bidirectional triode thyristor zero cross fired drive singal.
Operation principle of the present invention illustrates:
Trigger based on TSC bidirectional triode thyristor zero crossing; wish when capacitor switching exactly, ensure that the voltage at capacitor two ends is not undergone mutation, make capacitor smooth transition in switching process; for ensureing the reliably working of these circuits for triggering, the present invention has carried out corresponding safeguard measure in circuit:
1) silicon controlled trigger signal is synchronous: as shown in Figure 2, in circuit of the present invention, by making the voltage signal at reverse-blocking tetrode thyristor two ends decay through the first resistance R300, the second resistance R301, the small-signal making it produce keeps synchronous with the power supply signal of resonant tank.
2) isolation drive: in circuit of the present invention, the point of zero voltage signal of switch ends is obtained by full-wave rectification, this signal is through light-coupled isolation, level translation, produces feedback signal and the comparison signal of stable level, eliminates misleading of optocoupler, this circuit completes High frequency filter by electric capacity C300, avoided the over-voltage breakdown of optocoupler by diode D301, ensure the afterflow possibility of optocoupler reverse-conducting, circuit zero crossing can reliably be obtained.
3) crossover point signal is produced by comparison amplifier U301: in circuit of the present invention, comparison amplifier U301 selects the general COMS of AR8541AR or AR8542AR or AR8544AR, there is 1MHz bandwidth, the power consumption of each amplifier is only 45uA, rated temperature range is-400 DEG C to 1250 DEG C, power supply adopts single power supply, and supply district is 2.7V to 5V.
4) acquisition of sampled signal: in the circuit, what gather is the voltage signal at reverse-blocking tetrode thyristor two ends, controlled silicon conducting is triggered by signal zero crossing, this make switch with load capacitor in switch conduction process, complete the switching of capacitor, during capacitor switching, both end voltage is not suddenlyd change, and belongs to the process of stable transition; The i.e. impulse current that shoves of now switching generation is zero, what inhibit switching to produce shoves and harmonic wave, concerning the compensation of electric power system auto-tracing arc-eliminating coil is tuning, the real-time of tuning compensation can be met, the tuning process that the present invention is based on TSC adjustable capacitive-based arc-suppression coil compensation arrangement eliminates reactor, without switching time (3 ~ 10min) restriction in capacitor switching process, its switching time interval is no more than a power frequency component cycle.
Claims (8)
1. based on a zero-cross triggering circuit for bidirectional triode thyristor, it is characterized in that, comprising the input for obtaining bi-directional thyristor switch both end voltage signal, and send the output of zero cross fired signal to bidirectional triode thyristor;
Be disposed with between described input and output:
For carrying out the bridge circuit (D300) of full-wave rectification to controllable silicon both end voltage signal;
For voltage signal being fed back to first optocoupler (U300A) of device CPU;
For carrying out level translation to controllable silicon both end voltage signal, produce second optocoupler (U300B) of corresponding preliminary zero-crossing pulse signal;
For generation of the comparison amplifier (U301) of silicon control zero-cross point triggering signal;
For capacitor switching triggering signal phase that zero crossing triggering signal and tuning process CPU are sent and gating element (U302);
For generation of the driver (U303) of bidirectional triode thyristor zero cross fired drive singal.
2. the zero-cross triggering circuit based on bidirectional triode thyristor according to claim 1, is characterized in that: described input bi-directional thyristor switch both end voltage signal keeps synchronous with tuning power supply signal.
3. the zero-cross triggering circuit based on bidirectional triode thyristor according to claim 1 and 2, is characterized in that: be provided with the first resistance (R300) for decaying respectively to bi-directional thyristor switch both end voltage signal and the second resistance (R301) between described input and bridge circuit (D300).
4. the zero-cross triggering circuit based on bidirectional triode thyristor according to claim 1, is characterized in that: described bridge circuit (D300) rear end is provided with the electric capacity (C300) for carrying out High frequency filter.
5. the zero-cross triggering circuit based on bidirectional triode thyristor according to claim 1, is characterized in that: described the first optocoupler (U300A) front end is provided with the diode (D301) preventing optocoupler reverse breakdown and ensure reverse-conducting afterflow.
6. the zero-cross triggering circuit based on bidirectional triode thyristor according to claim 1, is characterized in that: described comparison amplifier (U301) front end is provided with the adjusting resistance (R306) triggering pulse duty factor for changing silicon control zero-cross point.
7. the zero-cross triggering circuit based on bidirectional triode thyristor according to claim 1 or 6, is characterized in that: described comparison amplifier (U301) selects AR8541AR, AR8542AR or AR8544AR.
8. the zero-cross triggering circuit based on bidirectional triode thyristor according to claim 1, is characterized in that: described driver (U303) adopts MOC3021 controllable silicon to export and drives optocoupler; Described the first optocoupler (U300A) and the second optocoupler (U300B) adopt TLP281 optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410783661.6A CN104505842B (en) | 2014-12-16 | 2014-12-16 | Zero-cross triggering circuit based on bidirectional triode thyristor |
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| CN201410783661.6A CN104505842B (en) | 2014-12-16 | 2014-12-16 | Zero-cross triggering circuit based on bidirectional triode thyristor |
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| CN104505842A true CN104505842A (en) | 2015-04-08 |
| CN104505842B CN104505842B (en) | 2016-06-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153274A (en) * | 2017-11-13 | 2018-06-12 | 北京全路通信信号研究设计院集团有限公司 | Safety input dynamic sampling circuit |
| CN108599753A (en) * | 2018-05-09 | 2018-09-28 | 上海兀林电子科技有限公司 | A kind of silicon-controlled strong trigger device in the double loop of high_voltage isolation |
| CN108988825A (en) * | 2018-07-19 | 2018-12-11 | 湖北工业大学 | A kind of double genlock trigger control methods of silicon controlled rectifier |
| CN109714034A (en) * | 2018-12-12 | 2019-05-03 | 崔凤来 | Automatically track silicon-controlled quasi- current over-zero trigger control method and circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250860A (en) * | 1998-10-09 | 2000-04-19 | 南开大学 | Numerally controlled microwave oven with continuously adjustable power |
| US6317346B1 (en) * | 2000-11-09 | 2001-11-13 | At&T Corporation | Redundant multiphase power supplies for common load device |
| CN2814802Y (en) * | 2005-06-27 | 2006-09-06 | 广东科龙电器股份有限公司 | Air conditioner fan motor stepless speed regulating device |
| CN202333809U (en) * | 2011-07-14 | 2012-07-11 | 大禹电气科技股份有限公司 | Zero-crossing trigger device for thyristor switched capacitor |
| CN203278225U (en) * | 2013-05-30 | 2013-11-06 | 西安科技大学 | A capacitor-adjusting automatic arc-extinguishing compensation apparatus |
| CN103956752A (en) * | 2014-04-11 | 2014-07-30 | 淮阴工学院 | Thyristor equal-voltage switching trigger circuit |
| CN204290331U (en) * | 2014-12-16 | 2015-04-22 | 榆林学院 | Based on the zero-cross triggering circuit of bidirectional triode thyristor |
-
2014
- 2014-12-16 CN CN201410783661.6A patent/CN104505842B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250860A (en) * | 1998-10-09 | 2000-04-19 | 南开大学 | Numerally controlled microwave oven with continuously adjustable power |
| US6317346B1 (en) * | 2000-11-09 | 2001-11-13 | At&T Corporation | Redundant multiphase power supplies for common load device |
| CN2814802Y (en) * | 2005-06-27 | 2006-09-06 | 广东科龙电器股份有限公司 | Air conditioner fan motor stepless speed regulating device |
| CN202333809U (en) * | 2011-07-14 | 2012-07-11 | 大禹电气科技股份有限公司 | Zero-crossing trigger device for thyristor switched capacitor |
| CN203278225U (en) * | 2013-05-30 | 2013-11-06 | 西安科技大学 | A capacitor-adjusting automatic arc-extinguishing compensation apparatus |
| CN103956752A (en) * | 2014-04-11 | 2014-07-30 | 淮阴工学院 | Thyristor equal-voltage switching trigger circuit |
| CN204290331U (en) * | 2014-12-16 | 2015-04-22 | 榆林学院 | Based on the zero-cross triggering circuit of bidirectional triode thyristor |
Non-Patent Citations (2)
| Title |
|---|
| 于新潮: "双向可控硅过零触发电路的设计", 《包头职业技术学院学报》 * |
| 芮长颖: "可控硅触发电路的设计", 《巢湖学院学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153274A (en) * | 2017-11-13 | 2018-06-12 | 北京全路通信信号研究设计院集团有限公司 | Safety input dynamic sampling circuit |
| CN108153274B (en) * | 2017-11-13 | 2020-07-03 | 北京全路通信信号研究设计院集团有限公司 | Safe input dynamic sampling circuit |
| CN108599753A (en) * | 2018-05-09 | 2018-09-28 | 上海兀林电子科技有限公司 | A kind of silicon-controlled strong trigger device in the double loop of high_voltage isolation |
| CN108599753B (en) * | 2018-05-09 | 2023-06-16 | 上海颐煊智能科技有限公司 | High-voltage isolation double-loop silicon controlled strong trigger device |
| CN108988825A (en) * | 2018-07-19 | 2018-12-11 | 湖北工业大学 | A kind of double genlock trigger control methods of silicon controlled rectifier |
| CN109714034A (en) * | 2018-12-12 | 2019-05-03 | 崔凤来 | Automatically track silicon-controlled quasi- current over-zero trigger control method and circuit |
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| Publication number | Publication date |
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| CN104505842B (en) | 2016-06-22 |
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Granted publication date: 20160622 Termination date: 20171216 |