CN101316040A - Intelligent marshalling combination switch - Google Patents
Intelligent marshalling combination switch Download PDFInfo
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- CN101316040A CN101316040A CNA2008100509603A CN200810050960A CN101316040A CN 101316040 A CN101316040 A CN 101316040A CN A2008100509603 A CNA2008100509603 A CN A2008100509603A CN 200810050960 A CN200810050960 A CN 200810050960A CN 101316040 A CN101316040 A CN 101316040A
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims description 30
- 230000005622 photoelectricity Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 abstract description 13
- 230000009471 action Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- 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
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Abstract
The invention provides an intelligent marshalling combination switch, comprising an AC electronic switch, a magnetic latching relay and a control circuit. The intelligent marshalling combination switch is characterized in that the control circuit is connected with at least a group of combination switches; the structure of the combination switch is that the AC electronic switch is connected in parallel with the magnetic latching relay with one-way contacts; the parallel end is connected in series with the magnetic latching relay with bidirectional contacts and the other parallel end is connected with one end of a single-phase capacitor and one end of a discharge coil; the other end of the single-phase capacitor and the other magnetic latching relay with bidirectional contacts are connected in series with each other and are connected into a return circuit. The intelligent marshalling combination switch can lead the single-phase capacitor to be freely switched without disturbance between the phase lines of the three-phase AC circuit and between the phase line and the zero line of the three-phase circuit, realizes the star-delta unequal arbitray connection of the single-phase capacitor under the control of a controller, completes adjusting the asymmetrical active load of the transformer and compensating the reactive loads at the same time, leads the transformer to be changed from the asymmetrical running to the symmetrical running, saves the power energy, and leads the power supply to have high quality and reliable running.
Description
Technical field
The present invention relates to the control technology field, is a kind of intelligent marshalling combination switch.
Background technology
In conventional reactive power compensator, prior art is to adopt the A.C. contactor opening-closing capacitor bank, or the electronic AC switch opening-closing capacitor bank, or both interchange combination switch opening-closing capacitor bank of composing in parallel are carried out reactive power compensation.Use the A.C. contactor switched capacitor to exist to shove and failure rate than problems such as height; Use the electronic AC switch switched capacitor to exist to cause the humorous problem such as heat radiation difficulty that involves; And the method for the interchange combination switch switched capacitor that both compose in parallel absorbed contactor conducting internal resistance little, do not generate heat and the electronic AC switch voltage zero-cross drops into, the advantage of current over-zero excision.Interchange combination switch in the market has the switching star to connect two types of load and switching corner connection loads, and two types interchange combination switch mixes and uses the common benefit that can finish the capacitor group and divide and mend switching.But existing star connects combination switch as shown in Figure 1, and star meets combination switch KA, KB, KC can only make each single-phase electricity container C be fixed and insert between the phase line and zero line of three-phase circuit; Existing corner connection combination switch as shown in Figure 2, corner connection combination switch Ka, Kb, Kc can only make each single-phase electricity container C be fixed and insert between the phase line and phase line of three-phase circuit, star connects or the corner connection combination switch all can not be with any switching of single-phase electricity container C between three-phase circuit phase line and the phase line, between phase line and the zero line, exist function singleness, weak effect, be unfavorable for saving electric energy and improve deficiencies such as power supply quality.
Summary of the invention
The objective of the invention is to, prior art is carried out substantial improvements, provide a kind of single-phase capacitance that can make to have a high regard for the meaning switching between the phase line and phase line of three-phase circuit, between phase line and the zero line, compensating reactive power when can realize the uneven burden with power of transformer adjusted, make transformer become symmetrical operation by asymmetric operation, save electric energy, power supply quality height, reliable intelligent marshalling combination switch.
For realizing purpose of the present invention, the inventor utilizes existing electronic devices and components to carry out organic optimum organization and be connected with element circuit, and through a large amount of research repeatedly, experiment and debugging, take following technical proposals: a kind of intelligent marshalling combination switch, it comprises electronic AC switch, magnetic latching relay and control circuit, it is characterized in that: control circuit is connected with one group of combination switch at least, the structure of described combination switch is, electronic AC switch is in parallel with the magnetic latching relay of a unidirectional contact, the magnetic latching relay series connection entry loop of an end that electronic AC switch is in parallel with the magnetic latching relay of a unidirectional contact and a two-way contact, electronic AC switch is connected with discharge coil one end with an end of single-phase electricity container with the other end of the magnetic latching relay parallel connection of a unidirectional contact.The magnetic latching relay series connection entry loop of the other end of single-phase electricity container and another two-way contact, the other end ground connection of discharge coil.
Described control circuit, comprise electronic AC switch drive circuit, single chip circuit, communication interface circuit and relay drive circuit, the input of single chip circuit is connected with the communication interface circuit output end, the output of single chip circuit is connected with the electronic AC switch drive circuit with relay drive circuit, the coil of the coil of magnetic latching relay of the output of relay drive circuit and the unidirectional contact of control and the magnetic latching relay of two-way contact is connected, and the electronic AC switch drive circuit is connected with at least one group of electronic AC switch.
Described electronic AC switch comprises that bidirectional triode thyristor is connected with the output of photoelectricity zero-cross triggering circuit, and the input of photoelectricity zero-cross triggering circuit is connected with the electronic AC switch drive circuit of control circuit.
Described bidirectional triode thyristor be bidirectional thyristor or thyristor to or anti-and turn-off thyristor right.
The beneficial effect that intelligent marshalling combination switch of the present invention has is:
1. can realize that single-phase capacitance has a high regard for the meaning switching between the phase line and phase line of three-phase circuit, between phase line and the zero line, compensating reactive power when can realize the asymmetric burden with power of transformer adjusted, make transformer become symmetrical operation by asymmetric operation, save electric energy, the power supply quality height, reliable.
2. the magnetic latching relay of Bing Lian electronic AC switch, unidirectional contact is connected with an end of discharge coil, the other end ground connection of discharge coil, when switch withdrawed from, circuit was connected on coil single-phase electricity container two ends automatically, and the electric charge with the single-phase electricity container in the several seconds discharges automatically.
3. the employing magnetic latching relay makes intelligent marshalling combination switch of the present invention only in switching action moment power consumption, not power consumption at ordinary times; And because the contact resistance of magnetic latching relay is little, thereby do not generate heat, so just need not outer radiation fin or fan, reduced cost, thoroughly avoided the phenomenon of burning of electronic AC switch, other electrical equipment with the machine operation is not worked the mischief simultaneously yet, really reached low-power consumption and energy saving purposes.
4. conducting moment is by the electronic AC switch zero cross fired, and the time-delay back is by relay adhesive, conducting, and electronic AC switch just can not produce harmonic wave after the relay adhesive conducting, thereby pollution-free to electrical network.
5. input signal and combination switch photoelectricity are isolated, and antijamming capability is strong, and is safe and reliable.
6. electric power system overtension or when crossing low power supply, the switch refusal is closed; Connect the back if throwing is then moved back in appearance automatically when getting over line.
7. when the working power phase shortage was powered, the switch refusal was closed; Connect the back if phase shortage occurring then moves back throwing automatically, can realize the supply voltage open-phase protection.
8. can monitor the running status of controllable silicon, magnetic latching relay automatically, if it breaks down, then combination switch is refused closed or moves back automatically to throw to disconnect, and can realize the self diagnosis error protection.
9. connect the back and meet power failure suddenly, switch is in off-state automatically when powering on again, can power-failure protecting.
Description of drawings
Fig. 1 connects the compound switch structure schematic diagram for the star of prior art.
Fig. 2 is the corner connection compound switch structure schematic diagram of prior art.
Fig. 3 is an intelligent marshalling combination switch structural representation of the present invention.
Fig. 4 is the electronic AC switch structural representation.
Fig. 5 is the control circuit schematic diagram.
Fig. 6 is a software block diagram.
Fig. 7 is the concrete application example schematic diagram of intelligent marshalling combination switch of the present invention.
Among the figure: 1 single chip circuit, 2 electronic AC switch drive circuits, 3 relay drive circuits, 4 communication interface circuit, 5 electronic AC switches, controller, 7 Switching Power Supplies, 8 lightning arresters, 9 current transformer terminal boards mended in the asymmetric automatic accent of 6 three-phase loads.
Embodiment
With reference to Fig. 3 and 4, but present embodiment is the intelligent marshalling combination switch of three 5KVAR single-phase electricity of switching container, has three groups of combination switches, and three groups of compound switch structures are all identical.The structure of first group of combination switch is, electronic AC switch 5 is in parallel with the magnetic latching relay K7 of unidirectional contact, the magnetic latching relay K2 series connection entry loop of end that electronic AC switch 5 is in parallel with the magnetic latching relay K7 of unidirectional contact and two-way contact, electronic AC switch 5 is connected with the end of single-phase electricity container C1 and the end of discharge coil L1 with the other end of the magnetic latching relay K7 in parallel of unidirectional contact.The magnetic latching relay K1 series connection entry loop of the other end of single-phase electricity container C1 and two-way contact, the other end ground connection of discharge coil L1.The structure of second group of combination switch is, electronic AC switch 5 is in parallel with the magnetic latching relay K8 of unidirectional contact, the magnetic latching relay K4 series connection entry loop of end that electronic AC switch 5 is in parallel with the magnetic latching relay K8 of unidirectional contact and two-way contact, electronic AC switch 5 is connected with the end of single-phase electricity container C2 and the end of discharge coil L2 with the other end of the magnetic latching relay K8 in parallel of unidirectional contact.The magnetic latching relay K3 series connection entry loop of the other end of single-phase electricity container C2 and two-way contact, the other end ground connection of discharge coil L2.The structure of the 3rd group of combination switch is, electronic AC switch 5 is in parallel with the magnetic latching relay K9 of unidirectional contact, the magnetic latching relay K6 series connection entry loop of end that electronic AC switch 5 is in parallel with the magnetic latching relay K9 of unidirectional contact and two-way contact, electronic AC switch 5 is connected with the end of single-phase electricity container C3 and the end of discharge coil L3 with the other end of the magnetic latching relay K6 in parallel of unidirectional contact.The magnetic latching relay K5 series connection entry loop of the other end of single-phase electricity container C3 and two-way contact, the other end ground connection of discharge coil L3.Electronic AC switch 5 structures of three groups of combination switches are all identical.The electronic AC switch 5 of first combination switch comprises that bidirectional triode thyristor SCR is connected with the output of photoelectricity zero-cross triggering circuit, and the input SCRA of photoelectricity zero-cross triggering circuit is connected with the electronic AC switch drive circuit 2 of control circuit.The electronic AC switch 5 of second combination switch comprises that bidirectional triode thyristor SCR is connected with the output of photoelectricity zero-cross triggering circuit, and the input SCRB of photoelectricity zero-cross triggering circuit is connected with the electronic AC switch drive circuit 2 of control circuit.The electronic AC switch 5 of the 3rd combination switch comprises that bidirectional triode thyristor SCR is connected with the output of photoelectricity zero-cross triggering circuit, and the input SCRC of photoelectricity zero-cross triggering circuit is connected with the electronic AC switch drive circuit 2 of control circuit.Three identical bidirectional triode thyristor SCR be bidirectional thyristor or thyristor to or anti-and turn-off thyristor right, its withstand voltage 1600V, rated current 50A.The photoelectricity zero-cross triggering circuit is a model MC3061 chip.The model of magnetic latching relay K1, the K2 of two-way contact, K3, K4, K5, K6 is JE10, and magnetic latching relay K7, the K8 of unidirectional contact, the model of K9 are 508A.Magnetic latching relay K1, the K2 of two-way contact, K3, K4, K5, K6 organize into groups single-phase electricity container C1, C2, C3, can realize that 64 kinds of organizational systems are used for controlled single-phase electricity container C1, any switching of C2, C3 between the phase line of three-phase circuit and phase line or between phase line and the zero line.
With reference to Fig. 3 and 5, described control circuit comprises electronic AC switch drive circuit 2, single chip circuit 1, communication interface circuit 4 and relay drive circuit 3, the input of single chip circuit 1 is connected with communication interface circuit 4, the output of single chip circuit 1 by relay drive circuit 3 respectively with control unidirectional contact magnetic latching relay K7, K8, the coil J7 of K9, J8, the magnetic latching relay K1 of J9 and two-way contact, K2, K3, K4, K5, the coil J1 of K6, J2, J3, J4, J5, J6 connects, and the output of single chip circuit 1 is connected with the input of the photoelectricity zero-cross triggering circuit of three groups of combination switches respectively by electronic AC switch drive circuit 2.Single chip circuit 1 comprises that model is connected with oscillating circuit of being made up of crystal oscillator Y1 and capacitor C 4, C5 and the reset circuit be made up of resistance R 1 and capacitor C 6 for the ATmega16 single-chip microcomputer is a core component.Communication interface circuit 4 is a model MC3485 chip, and relay drive circuit 3 is a model MC1413 chip, and electronic AC switch drive circuit 2 is a model MC1413 chip.The electronic AC switch 5 of intelligent marshalling combination switch and the action of magnetic latching relay K1-K9 are controlled by control circuit.The single-chip microcomputer U1 of control circuit mends controller 6 by the MC3485 chip of interface circuit 4 with the asymmetric automatic accent of three-phase load and links to each other, single-chip microcomputer U 1 accepts the order that controller 6 mended in the asymmetric automatic accent of three-phase load, by I/O port output control pulse, drive the action of magnetic latching relay K1-K9 and electronic AC switch through drive circuit chip MC1413.
During marshalling, magnetic latching relay K1, K2, K3, K4, K5, the K6 of elder generation's action two-way contact, the K1S of the magnetic latching relay of two-way contact, K2S, K3S, K4S, K5S, K6S are the set end, the K1R of the magnetic latching relay of two-way contact, K2R, K3R, K4R, K5R, K6R are reset terminal, when set brings out existing high level pulse, left side A, B, C end among the magnetic latching relay contacting figure of two-way contact, when high level pulse appears in reset terminal, N end in right side among the magnetic latching relay contacting figure of two-way contact.Like this according to different marshalling orders, the relay set that has, the relay that has resets, and has just finished the circuit marshalling of relay connection.
When dropping into the single-phase electricity container, single-chip microcomputer U1 is according to the order that receives, the magnetic latching relay K1 of control two-way contact, K2, K3, K4, K5, marshalling is finished in the K6 action, send high trigger signal control electronic AC switch 5 then, between the phase line and phase line of the undisturbed access three-phase circuit of single-phase electricity container C1-C3, between between phase line and zero line, the electric current of single-phase electricity container C1-C3 just flows through from electronic AC switch 5, after three bidirectional triode thyristor S CR conducting of electronic AC switch 5 through the time-delay of a few tens of milliseconds, control the magnetic latching relay K7 of unidirectional contact more respectively, K8, the K9 closure, electronic AC switch 5 bypasses, the electric current of single-phase electricity container C1-C3 just flows through from relay, at this moment remove triggering signal again, close electronic AC switch, finish the action of electric capacity input.
During excision single-phase electricity container, single-chip microcomputer U1 is according to the order that receives, send the triggering and conducting order of electronic AC switch 5 earlier, just automatic conducting when voltage zero-cross of electronic AC switch 5, single-phase electricity container C1-C3 is inserted in the three-phase circuit, delay time after 100 milliseconds, single-chip microcomputer U1 sends action command again, make relay drive circuit 2 ends output reset pulse, the magnetic latching relay K7 of unidirectional contact, K8, K9 disconnects, the electric current of single-phase electricity container C1-C3 just flows through from electronic AC switch 5, delay time after 100 milliseconds, send the low level of electronic AC switch 5 again and turn-off order, electronic AC switch 5 just automatically shuts down when current over-zero, sends the K1R of the magnetic latching relay of two-way contact afterwards again, K2R, K3R, K4R, K5R, the reset pulse of K6R, relay contact is connected N end in right side among the figure, has finished the excision of single-phase electricity container C1-C3 and resetting of marshalling circuit like this.
The control circuit that intelligent marshalling combination switch of the present invention adopted is the technology that those skilled in the art are familiar with, but is not to be unique control mode, and its function also can adopt other controller to realize.The single-chip microcomputer model of the single chip circuit 1 of control circuit, communication interface circuit 4 chip models, electronic AC switch drive circuit 2 chip models, relay drive circuit 3 chip models all are not to be unique appointment model, and those skilled in the art are familiar with the chip of other model of identical function and are replaced.Magnetic latching relay K1, the K2 of two-way contact, K3, K4, K5, K6 can adopt single-pole double throw contact type, or two single-pole single-throw(SPST contacts is combined.Magnetic latching relay K7, K8, K9 can adopt single-pole single-throw(SPST contact type or single-pole double throw contact type.
With reference to Fig. 6, the software program of intelligent marshalling combination switch is the technology that those skilled in the art were familiar with according to automatic control technology and microcomputer data processing establishment.The initialization of software and hardware is carried out in the program beginning that at first resets, and serial ports is waited for and being taken orders, and checks whether be the order of issuing oneself, if then carry out the operation that excision is ordered, if not examine such as then carrying out.
With reference to Fig. 7, mainly mend controller 6 by 1 asymmetric automatic accent of LHRC-TB type three-phase load, 4 intelligent marshalling combination switch of the present invention, the HD-50 type D.C. regulated power supply 7 of 1 input AC2 20V output DC5V/12V, 12 single-phase electricity container C that withstand voltage 415V capacity is 5KVAR, 4 NB1-63-40 type 4P miniature circuit breakers, a NM1-100 breaker of plastic casing, 3 group 400/5 current transformer CTA, CTB, CTC, 3 zinc oxide arresters 8, asymmetric automatic adjustment of a three-phase load and reactive power compensator that 9,12 discharge coil L of current transformer terminal board etc. constitute.Total accent benefit capacity that device mended in this accent is 60KVAR.
Its course of work is: controller 6 three-phase alternating voltage and 3 current transformer CTA by inserting mended in the asymmetric automatic accent of three-phase load, CTB, CTC measures numerical value such as three-phase voltage, electric current, active power, reactive power, power factor, go out between phase and phase and mutually and need the quantity of the single-phase electricity container C that drops between the zero line according to these data computation, and issue each intelligent marshalling combination switch by the bus of the MC3485 chip of communication interface circuit 4 dropping into order at three-phase circuit.Each intelligent marshalling combination switch is according to the input action of the corresponding single-phase electricity container of the command execution C that receives separately, thereby realization single-phase electricity container C is to the adjustment of transformer burden with power with to the idle compensation of perception.
All components and parts of intelligent marshalling combination switch of the present invention are the commercially available prod, implement easily.Model machine of the present invention meets design requirement fully through testing and trying out in 12 months, has realized purpose of the present invention and has reached the beneficial effect that technical scheme is brought.
Claims (4)
1. intelligent marshalling combination switch, it comprises electronic AC switch, magnetic latching relay and control circuit, it is characterized in that: control circuit is connected with one group of combination switch at least, the structure of described combination switch is, electronic AC switch is in parallel with the magnetic latching relay of a unidirectional contact, the magnetic latching relay series connection entry loop of an end that electronic AC switch is in parallel with the magnetic latching relay of a unidirectional contact and a two-way contact, electronic AC switch is connected with discharge coil one end with an end of single-phase electricity container with the other end of the magnetic latching relay parallel connection of a unidirectional contact.The magnetic latching relay series connection entry loop of the other end of single-phase electricity container and another two-way contact, the other end ground connection of discharge coil.
2. intelligent marshalling combination switch according to claim 1, it is characterized in that: described electronic AC switch, comprise that bidirectional triode thyristor is connected with the output of photoelectricity zero-cross triggering circuit, the input of photoelectricity zero-cross triggering circuit is connected with the electronic AC switch drive circuit of control circuit.
3. intelligent marshalling combination switch according to claim 2, it is characterized in that described bidirectional triode thyristor be bidirectional thyristor or thyristor to or anti-and turn-off thyristor right.
4. intelligent marshalling combination switch according to claim 1, it is characterized in that: described control circuit, comprise the electronic AC switch drive circuit, single chip circuit, communication interface circuit and relay drive circuit, the input of single chip circuit is connected with the communication interface circuit, the coil of the coil of the output of the output of single chip circuit by relay drive circuit and the magnetic latching relay of the unidirectional contact of control and the magnetic latching relay of two-way contact is connected, and the output of single chip circuit passes through the electronic AC switch drive circuit and is connected with at least one group of electronic AC switch switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100509603A CN101316040A (en) | 2008-07-10 | 2008-07-10 | Intelligent marshalling combination switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100509603A CN101316040A (en) | 2008-07-10 | 2008-07-10 | Intelligent marshalling combination switch |
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| CN101316040A true CN101316040A (en) | 2008-12-03 |
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| CNA2008100509603A Pending CN101316040A (en) | 2008-07-10 | 2008-07-10 | Intelligent marshalling combination switch |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854075A (en) * | 2010-05-27 | 2010-10-06 | Asco电力技术公司 | Arc extinguishing hybrid switch and switching method |
| CN101958573A (en) * | 2009-07-13 | 2011-01-26 | Asco电力技术公司 | Arc extinguishing mixed transfer switch and switch transferring method |
| CN102334257A (en) * | 2009-03-06 | 2012-01-25 | Abb技术有限公司 | Multi-phase reactive power compensator |
| CN102394501A (en) * | 2011-03-18 | 2012-03-28 | 北京潞能麒麟电力设备有限公司 | Energy-saving method and device based on power grid load dynamic balance |
| CN102419387A (en) * | 2011-12-13 | 2012-04-18 | 河南省电力公司平顶山供电公司 | Rapidly-adjustable three-phase load electricity meter box |
| CN103701403A (en) * | 2013-12-31 | 2014-04-02 | 清华大学 | Multichannel coil current switching device |
| CN105553246A (en) * | 2015-12-17 | 2016-05-04 | 华为技术有限公司 | Power-on/power-off driving circuit and control method therefor |
| CN106646214A (en) * | 2017-01-12 | 2017-05-10 | 中国计量大学 | Three-phase four-wire electric energy meter and zero-crossing switching control and self-switching fault determination method |
| CN111799112A (en) * | 2020-06-09 | 2020-10-20 | 国网山东省电力公司检修公司 | Intelligent phase selection control system and method with dynamic adaptive function |
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2008
- 2008-07-10 CN CNA2008100509603A patent/CN101316040A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102334257B (en) * | 2009-03-06 | 2015-06-03 | Abb技术有限公司 | Poly-phase reactive power compensator |
| CN102334257A (en) * | 2009-03-06 | 2012-01-25 | Abb技术有限公司 | Multi-phase reactive power compensator |
| CN101958573A (en) * | 2009-07-13 | 2011-01-26 | Asco电力技术公司 | Arc extinguishing mixed transfer switch and switch transferring method |
| CN101854075A (en) * | 2010-05-27 | 2010-10-06 | Asco电力技术公司 | Arc extinguishing hybrid switch and switching method |
| CN101854075B (en) * | 2010-05-27 | 2012-09-05 | Asco电力技术公司 | Arc extinguishing hybrid switch and switching method |
| CN102394501A (en) * | 2011-03-18 | 2012-03-28 | 北京潞能麒麟电力设备有限公司 | Energy-saving method and device based on power grid load dynamic balance |
| CN102394501B (en) * | 2011-03-18 | 2014-04-02 | 北京潞能麒麟电力设备有限公司 | Energy-saving method and device based on power grid load dynamic balance |
| CN102419387A (en) * | 2011-12-13 | 2012-04-18 | 河南省电力公司平顶山供电公司 | Rapidly-adjustable three-phase load electricity meter box |
| CN103701403A (en) * | 2013-12-31 | 2014-04-02 | 清华大学 | Multichannel coil current switching device |
| CN103701403B (en) * | 2013-12-31 | 2017-04-19 | 清华大学 | Multichannel coil current switching device |
| CN105553246A (en) * | 2015-12-17 | 2016-05-04 | 华为技术有限公司 | Power-on/power-off driving circuit and control method therefor |
| WO2017101647A1 (en) * | 2015-12-17 | 2017-06-22 | 华为技术有限公司 | Power-on/power-off drive circuit and control method therefor |
| CN105553246B (en) * | 2015-12-17 | 2018-06-05 | 华为技术有限公司 | Upper and lower electric drive circuit and its control method |
| US10748724B2 (en) | 2015-12-17 | 2020-08-18 | Huawei Technologies Co., Ltd. | Power-on/off drive circuit and method for controlling power-on/off drive circuit |
| CN106646214A (en) * | 2017-01-12 | 2017-05-10 | 中国计量大学 | Three-phase four-wire electric energy meter and zero-crossing switching control and self-switching fault determination method |
| CN106646214B (en) * | 2017-01-12 | 2019-06-28 | 中国计量大学 | Three-phase and four-line electric energy meter and operating passing zero control and itself switching fault judgment method |
| CN111799112A (en) * | 2020-06-09 | 2020-10-20 | 国网山东省电力公司检修公司 | Intelligent phase selection control system and method with dynamic adaptive function |
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Open date: 20081203 |