CN202424301U - Solid state change-over switch - Google Patents
Solid state change-over switch Download PDFInfo
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- CN202424301U CN202424301U CN2012200020853U CN201220002085U CN202424301U CN 202424301 U CN202424301 U CN 202424301U CN 2012200020853 U CN2012200020853 U CN 2012200020853U CN 201220002085 U CN201220002085 U CN 201220002085U CN 202424301 U CN202424301 U CN 202424301U
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Abstract
The utility model discloses a solid state change-over switch. The solid state change-over switch is connected in a power supply circuit of multiple paths of alternating current power supply for providing electricity for loads, and is used for switching multiple paths of alternating current power supply. The solid state change-over switch comprises a main controller, a voltage detection device used for detecting voltage value of each path of alternating current power supply, and multiple groups of switch units, wherein each switch unit is formed by reversely connecting two thyristors in parallel, the voltage detection device is connected in the power supply circuit connected with an alternating current power supply and the switch units, generated voltage detection values are output to a main controller, and triggering signals used for controlling the on-off state of the thyristors are generated by the main controller according to the received voltage values. The switch units are correspondingly connected in the power supply circuit of each path of alternating current power supply in series, control electrodes of the thyristors are connected with the main controller to receive the triggering signals output by the main controller so as to switch the power supply circuit. The switching time of the solid state change-over switch is less than 6m, so that the continuity and the reliability of the sensitive load power supply can be actually ensured.
Description
Technical field
The utility model belongs to the power control technology field, specifically, relates to a kind of electric energy switching device shifter of between the multiple-way supply power supply, switching fast of being used for.
Background technology
In present mains supply system; Electrical network through regular meeting because large-scale non-linear/reasons such as the switching of impact load, thunder and lightning weather, load faulty; Cause supply power voltage moment to fall problems such as (rolling promptly occurring) or power failure temporarily; Cause some responsive power consumption equipment (for example computer server, data processor, the equipment that do not allow to cut off the power supply etc.) to stop power supply thus; Thereby bring serious consequences such as equipment stoppage in transit, technological process interruption, loss of data, device damage for the systems such as industry or financial center, data center, hospital, communications and transportation of oil, chemical industry, semiconductor, weaving, metallurgical equicontinuity production, cause great economic loss even casualties.Therefore; There is the industry of specific (special) requirements often all to dispose the multiple-way supply power supply for power supply; In case the main power source of operation breaks down or unusually, need with the power supply unperturbed of sensitive loads switch on other stand-by power supplies, to satisfy the uninterrupted power supply demand of sensitive loads.
Electric energy switching device shifter for being used at present between multiple power supplies, switching adopts mechanical switch mostly, and switching time is between the several seconds to tens of seconds.And, require to accomplish within 20 milliseconds even several milliseconds the switching of power supply for some sensitive loads, therefore, traditional electric energy switching device shifter obviously can't satisfy the requirement of these sensitive loads to the power supply switch speed.And traditional electric energy switching device shifter produces electric arc through regular meeting in switching process, also make greatly shorten the useful life of such electric energy switching device shifter thus.
Summary of the invention
The utility model is in order to solve the problem that existing electric energy switching device shifter switching time is long, useful life is short; A kind of solid converting switch that can realize that multiple power supplies switches rapidly is provided; When guaranteeing the network system safe operation, satisfied the continuous need for electricity of sensitive loads.
For solving the problems of the technologies described above, the utility model adopts following technical scheme to be achieved:
A kind of solid converting switch; Being connected to load provides in the supply line in multiple AC source of Alternating Current Power Supply; Be used between the multiple AC source, switching, comprise master controller, be used to detect voltage check device and the switch element that multicomponent is not made up of two thyristor reverse parallel connections of the magnitude of voltage of each road AC power; Said voltage check device is connected in AC power and the supply line that switch element is connected; Sampling formation voltage detected value exports described master controller to, and said master controller generates the triggering signal that is used to control the thyristor break-make according to the voltage detecting value that receives; Said switch element is connected in the supply line of each road AC power correspondingly, and the control utmost point of its thyristor connects master controller, receives the triggering signal of master controller output, to carry out the switching of supply line.
Preferably, in each bar phase power line of said each road AC power, all be in series with one group of described switch element.
Further; In said voltage check device, include the potential-divider network that multicomponent is not composed in series by a plurality of divider resistances; Between each bar phase power line of AC power and ground, be connected one group of described potential-divider network separately, press one of them dividing potential drop node output voltage detected value to the described master controller of network through each component.
For the current over-zero of realizing each road thyristor detects; In the supply line of said each road AC power connection load, all be connected with the current sensing means that is used for AC power is carried out current detecting, said current sensing means output current detection signal to described master controller.
Preferably, in said multiple AC source, include No. one main power source and at least one road stand-by power supply, said stand-by power supply and main power source are synchronous.
For main power source and stand-by power supply is not the situation of conventional power supply, in order to satisfy the power demands of load, in the supply line of said each road AC power connection load, all is connected with the transformer that is used for AC power is carried out decompression transformation.
For the not enough master controller of interface driving force,, after the triggering signal of said master controller output handled via driver element, export the control utmost point of thyristor again in order to realize accurate triggering to each road thyristor.
Further again, in said solid converting switch, also be provided with man-machine interaction unit, connect described master controller, the system that receives outside input is provided with parameter, and the ruuning situation of display system.
Further; In said man-machine interaction unit, also be provided with the telecommunication module; Said telecommunication module is carried out two-way communication with wired or wireless data transmission mode and long-range control centre; The ruuning situation of system periodically is sent to long-range control centre, and can receives the system that control centre sends parameter is set, and then realize remote monitoring function.
For ease solid converting switch is overhauled and safeguard; Two ends at said each group switch element are parallel with a by-pass switch respectively; When solid converting switch being overhauled or safeguards, can closes bypass switch, be that load continues power supply through bypass.
Compared with prior art; The advantage and the good effect of the utility model are: the solid converting switch of the utility model switches to another road power supply from one road power supply; Its switching time can be less than 6 milliseconds; Not only can avoid the power supply termination problem that brings because of voltage dip thus, and complementation, unperturbed power supply, ensure the continuity and the reliability of sensitive loads power supply conscientiously from truly having realized multiple power supplies.Through adopting thyristor as switching device; Thereby effectively avoided the generation of electric arc in the switching process; Stop the appearance of circulation phenomenon, guaranteed the normal and stable operation of safety and the load of network system, had significant advantages such as small investment, economize on electricity, power supply are reliable, safety.
After the detailed description in conjunction with advantages the utility model execution mode, other characteristics of the utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the overall architecture sketch map of the solid converting switch that proposes of the utility model;
Fig. 2 is the schematic block circuit diagram that solid converting switch is applied in a kind of embodiment in the three-phase dual power supply system.
Embodiment
Describe in detail below in conjunction with the embodiment of accompanying drawing the utility model.
The utility model adopts mechanical switch to carry out supply line's switching in order to solve traditional electric energy switching device shifter; In switching process, be prone to produce electric arc; And then influence the device problem in useful life, propose to utilize thyristor to form the switch element that is used to carry out supply line's change action, and cooperate control unit and detecting unit to form solid converting switch as switch element; Realization is switched the unperturbed of multiple-way supply power supply; Not only avoided the generation of electric arc in the handoff procedure, and switch motion response rapidly, for the normal operation that continues of electricity consumption type load continuously provides guarantee.
Come to set forth in detail the concrete establishment structure and the operation principle thereof of said solid converting switch below through a concrete embodiment.
Embodiment one, and referring to shown in Figure 1, the solid converting switch of present embodiment mainly comprises voltage check device V1, V2, master controller and parts such as switch element SCR1, SCR2.Wherein, voltage check device V1, V2 are used for the magnitude of voltage of each road AC power is carried out sample detecting, offer master controller to accomplish whether AC power unusual analysis and judgement are occurred; Switch element SCR1, SCR2 comprise many groups, are connected in the supply line of each road AC power, are used between each road AC power, selecting switching.Present embodiment is in the process of the said switch element SCR1 of design, SCR2; Consider that thyristor has characteristics such as cost is low, overload capacity is strong, reliability height; Adopt thyristor to design described switch element SCR1, SCR2 as switch element, as shown in Figure 1.Consider the electric current transmitted in both directions characteristic of AC power; When the said switch element SCR1 of design, SCR2; Need organize at each two thyristor T1P/T1N, T2P/T2N all are set among switch element SCR1, the SCR2; And behind two thyristor T1P/T1N, T2P/T2N reverse parallel connection, be connected in the supply line of each road AC power.When AC power was in positive half cycle, electric current flow through from forward thyristor T1P or T2P; When AC power was in negative half period, electric current flow through from reverse thyristor T1N or T2N.The control utmost point of each thyristor T1P/T1N, T2P/T2N is connected on the different triggering signal output interfaces of master controller, and conducting or shutoff under the control action of the triggering signal that master controller sends are to realize the switching controls to supply line.For the not enough master controller of interface driving force; Can on the triggering signal output interface of master controller, further connect driver element; Promote the driving force of triggering signal through driver element, to realize triggering control to each road thyristor T1P/T1N, T2P/T2N.
In actual application; Because the overwhelming majority all is that to adopt line voltage be electric as main power source the times; Have only that when line voltage breaks down, just need to switch to stand-by power supply be electric; Therefore, present embodiment is connected on switch element SCR1, SCR2 respectively in the supply line of electrical network and stand-by power supply, and said stand-by power supply can be provided with one the tunnel also can be provided with the multiple AC source.After system formally puts into operation; When need of load powered on operation, whether master controller was at first normal through voltage check device V1 detection of grid voltage, if normal; Then master controller triggers and is connected each road thyristor T1P, the T1N conducting in the mains supply circuit, utilizes line voltage to be electric.If line voltage is undesired; Whether normal, if stand-by power supply is normal, then master controller triggers and is connected each road thyristor T2P, the T2N conducting in the stand-by power supply supply line through voltage check device V2 if then detecting stand-by power supply; Utilize stand-by power supply to be electric, the control load operation that powers on.If stand-by power supply also occurs then keeping the current off position of load unusually, and the alarm signal of out-put supply fault.
Suppose at power on when operation line voltage of need of load normally, then master controller at first triggers each road thyristor T1P, the T1N conducting that is connected in the mains supply circuit, makes the load operation that powers on.In the process of load running; Master controller detects line voltage through voltage check device V1 in real time; If mains supply occurs unusual, for example the amplitude of line voltage takes place to fall temporarily or fluctuation etc., and voltage magnitude is reduced to power supply minimum threshold that load allows when following; Then the thyristor T1P, the T1N that stop in being connected the mains supply circuit of master controller sends triggering signal; Then control connection thyristor T2P, the T2N conducting in No. one stand-by power supply supply line therein, switching to stand-by power supply is electric, to satisfy the continuous need for electricity of load.Generally, the electric weight of stand-by power supply is limited, and suitable is electric for a long time, need recover the timely net of wiring back that switches in back at line voltage and continue to supply power.Therefore; Present embodiment is in the process of electric adopting stand-by power supply; Continue line voltage is detected in real time through voltage check device V1, when detecting the mains supply recovery, then thyristor T1P, the T1N conducting of control connection in the mains supply circuit again; Thyristor T2P in the stand-by power supply supply line, T2N turn-off, and continue as electric to switch the telegram in reply net.If before mains supply recovers; Current is that the stand-by power supply of electric takes place unusual; For example voltage magnitude takes place to fall temporarily or fluctuates and when being lower than the power supply minimum threshold that load allows; Then master controller should switch to power supply on other the stand-by power supply, specifically can adopt to trigger to be connected the thyristor conducting in other stand-by power supply supply lines, and close the thyristor T2P in the current stand-by power supply supply line, the control mode of T2N; The power supply of load is switched on other the stand-by power supply, to guarantee the continuity of power supply.
In order to improve the reliability that power supply switches, the one group of switch element be made up of two thyristor reverse parallel connections of preferably in each bar phase power line of each road AC power, all connecting is used for each bar phase power line is carried out break-make control.As shown in Figure 2, for three-phase alternating-current supply, just need three groups of described switch elements, be connected on correspondingly among three phase power line A, B, the C, respectively three phase mains is carried out switching controls.In the supply line of main power source and each road stand-by power supply, all be connected a voltage check device V1, V2, specifically be connected on the connection line between each road AC power and the switch element, be used for the phase voltage of each road AC power is carried out sample detecting.Said voltage check device V1, V2 can adopt the form design realization that is composed in series potential-divider network by a plurality of divider resistances; Be connected between each bar phase power line and ground of AC power; Through selecting suitable dividing potential drop node to produce the voltage detecting value; Export master controller to, and then converse the phase voltage of each road AC power, to accomplish voltage detecting each road AC power.
For main power source and stand-by power supply is not the situation of conventional power supply (is that the AC power of 380V is defined as conventional power supply with line voltage); Such as AC power more than 10 kilovolts etc.; Then need in the supply line of main power source and stand-by power supply, increase transformer T1, T2, as shown in Figure 1, main power source and stand-by power supply carried out decompression transformation after; Transfer to described voltage check device V1, V2 and switch element SCR1, SCR2 again, and then satisfy the safety utilization of electric power demand of back level load.
In the supply line of main power source and stand-by power supply, can also further be connected current sensing means I1, I2; As shown in Figure 1; Specifically can adopt D.C mutual-inductor to be connected in the supply line of each road AC power; Be used for the phase current of each road AC power is carried out zero passage detection, and current detection signal is transferred to described master controller, accomplish reliable switching each group switch element SCR1, SCR2 to assist master controller.
In order to satisfy the requirement of man-machine interaction; In the solid converting switch device of present embodiment, also be provided with man-machine interaction unit; As shown in Figure 1; Can specifically adopt touching display screen or keyboard to add the design of display screen, connect described master controller, with the input of realization external command and the Presentation Function of testing result.The technical staff utilizes described man-machine interaction unit when master controller is imported its work, parameter to be set needed system; The power supply minimum threshold that for example load allowed, switch back the delay time of main power source, parameter such as select to be provided with automatically and manually, control with the completion system from stand-by power supply.Can utilize the telecommunication module that is arranged in the man-machine interaction unit regularly to be sent to long-range control centre for the ruuning situation of system, realize remote monitoring and maintenance function with wired or wireless data transmission mode.
By-pass switch K1 of parallel connection, K2 can also be distinguished in two ends at each group switch element SCR1, SCR2, and said by-pass switch K1, K2 can select hand switch for use, also can select electric-controlled switch for use.When solid converting switch breaks down or shuts down, can make things convenient for maintenance, maintenance and the detection of solid converting switch through bypass to electric.
For the purpose of easy for describing, clear, present embodiment is that example is set forth the handoff procedure of said solid converting switch in detail with No. one main power source and No. one stand-by power supply.
At first, introduce the voltage dip detection mode.For a variety of detection methods being arranged for whether the AC power of electric the voltage dip problem takes place; In order to accelerate detection speed; And the reliability of assurance detection; Present embodiment proposes a kind ofly to detect the voltage of power supply based on the instantaneous voltage d-q decomposition transform algorithm of broad sense instantaneous reactive power theory, to realize whether voltage to power supply is reduced to the power supply minimum threshold that load allowed and judges fast and accurately.Its concrete detection method is:
For current be the situation of three-phase alternating-current supply for the AC power of electric; Can directly utilize voltage check device V1 or V2 to gather each road phase voltage
,
,
of three-phase alternating-current supply; Transfer to master controller, to participate in subsequent calculations.
For current be the situation of single phase alternating current power supply for the AC power of electric; Then at first utilize voltage check device V1 or V2 to gather the hot voltage
of single phase alternating current power supply, export master controller then to; Adopt method of derivation to construct virtual three-phase voltage through master controller, that is: by single-phase voltage
Wherein,
,
is the frequency of AC power.
The three-phase voltage
,
,
transformed into the dq-axes by the equation:
In the formula, transformation factor vector:
;
Thus; Calculate
,
, the instantaneous value computing formula of substitution first-harmonic effective value:
Just can calculate the instantaneous value
of first-harmonic effective value.Power supply minimum threshold (being input in the master controller through man-machine interaction unit by the technical staff) with
with load compares; To judge current is whether the AC power of electric the voltage dip problem takes place, and then determines whether to carry out the handover operation of AC power.
The computational methods of the instantaneous value of traditional calculations first-harmonic effective value
are:
In the formula, n is the voltage sample number in cycle of AC power, generally can not be less than 100;
is i voltage detecting value.This shows that traditional
computational methods need open the radical sign computing; Software programming realizes difficulty; And execution cycle is long; Be unfavorable for the quick judgement of voltage dip problem, thereby influenced the switch speed of supply line.And instantaneous value
computational methods of the employing first-harmonic effective value that present embodiment proposed; Programming easily; Computational speed is fast; Master controller is taken place when unusual at power supply; In time produce triggering signal, control switch unit SCR1, SCR2 carry out the rapid switching of supply line, for the seamless switching of supplying power provides the basis.
Switching controls to switch element SCR1, SCR2 is the core control section of whole solid converting switch device, and important performance index are exactly switching time, and the selection of switching control strategy is the key factor that influences switching time.Switching control strategy mainly contains two kinds: Break-Before-Make (be called for short BBM, have no progeny earlier and cut) and Make-Before-Break (be called for short MBB, cut afterwards earlier and break).The BBM control mode is that the electric current that in being about to thyristor module out of service, flows through is reduced to zero, and thyristor closes fully has no progeny, and triggers the thyristor module conducting that is about to put into operation again.This control mode can be avoided main power source and stand-by power supply parallel running fully, guarantees the safe operation of electrical network and sensitive load.But, if solid converting switch adopts the operation of this control mode, then switching time oversize, can cause some sensitive loads to be stopped transport, thereby limit the range of application of solid converting switch.The MBB control mode is that the electric current that in being about to thyristor module out of service, flows through is not when being reduced to zero; The thyristor module that triggering is about to put into operation is opened; And then the electric current of forcing to be about to flowing through in the thyristor module out of service is reduced to zero, accelerates switch speed, shortens switching time; But control procedure is comparatively complicated.
In order to shorten switching time, the reliability of proof load power supply, present embodiment has proposed a kind of brand-new quick MBB switching control strategy.This strategy is through detecting each terminal voltage U to thyristor
Pea(be each terminal voltage U that thyristor is connected AC power one side
Pea, as shown in Figure 2), judge the current polarity that flows through thyristor; Trigger according to current polarity then and be connected the corresponding thyristor conducting of the relation of being attached thereto in other one tunnel AC power, to accomplish the switching of this power circuit.Switching control strategy is that each phase power line of AC power is controlled respectively, is that example describes mutually with the A of three-phase alternating-current supply, and the control mode of B, C two phases is identical.
In conjunction with shown in Figure 2; Receive the voltage detecting value of voltage detection module V1 feedback when master controller after; At first calculate the instantaneous value
of first-harmonic effective value; Power supply minimum threshold with load compares then, if be higher than the power supply minimum threshold of load, thinks that then line voltage is normal; Keep the current on off operating mode of respectively organizing switch element, continuing to adopt electrical network is electric.If calculate the power supply minimum threshold that
is lower than load; Think that then line voltage is unusual; Such as the voltage dip problem takes place, then need carry out the handover operation of supply line.At this moment, whether master controller at first detects stand-by power supply through voltage check device V2 normal, when stand-by power supply just often, begin to carry out handoff procedure.For stand-by power supply and line voltage synchronously with asynchronous two kinds of situation, master controller can adopt following two kinds of different switching control strategies respectively, launches explanation below respectively.
When stand-by power supply and line voltage were synchronous, the thyristor that master controller at first stops in each the phase power line that is connected electrical network sent triggering signal, is that example describes mutually with A.Then, through voltage check device V1 to being connected the thyristor T1P in the A phase power line, the terminal voltage U of T1N
PeaCarry out polarity and detect, if terminal voltage U
Pea>0, be positive polarity, explain that then electric current flows to load by electrical network, and the forward thyristor T1P that flows through.At this moment, reverse thyristor T1N ends because of its two ends have loaded reverse voltage, and forward thyristor T1P still keeps conducting state.The forward thyristor T2P of master controller in the A phase power line that is connected stand-by power supply sends triggering signal, control forward thyristor T2P conducting.After the thyristor T2P triggering and conducting, if the voltage of stand-by power supply is higher than line voltage, then thyristor T1P ends because of its two ends have added reverse voltage.When the electric current that detects thyristor T1P is reduced to zero; Represent that then thyristor T1P turn-offs fully; Then the reverse thyristor T2N in the A phase power line that is connected stand-by power supply sends triggering signal, controls reverse thyristor T2N conducting, accomplishes the handoff procedure of this phase power circuit.In like manner, if detect terminal voltage U through voltage check device V1
Pea<0, be negative polarity, then explain electric current by load flow to electrical network, and the reverse thyristor T1N that flows through.At this moment, forward thyristor T1P ends because of its two ends have loaded reverse voltage, and reverse thyristor T1N still keeps conducting state.In this case; The master controller at first reverse thyristor T2N in the A phase power line that is connected stand-by power supply sends triggering signal; When treating the current over-zero of the reverse thyristor T1N in the power network line; Forward thyristor T2P in the A phase power line that is connected stand-by power supply sends triggering signal again, controls forward thyristor T2P triggering and conducting, accomplishes the handoff procedure of this phase power circuit.The handoff procedure of B, C two phases is identical, and present embodiment is repeat specification no longer.
In the present embodiment, can utilize the current sensing means I1 that is connected in the mains supply circuit to realize the current over-zero of thyristor T1P, T1N is detected.For with the stand-by power supply of synchronized, can utilize inverter to generate according to the phase place inversion of electrical network.Certainly, present embodiment is not limited in above giving an example.
When stand-by power supply is asynchronous with line voltage; Master controller is reduced to the power supply minimum threshold of load when following in the amplitude that detects line voltage; The thyristor that at first stops in being connected each phase power line of electrical network sends triggering signal, through voltage check device V1 the terminal voltage of each road thyristor is carried out polarity then and detects.Be that example describes still, if be connected the thyristor T1P in the A phase power line, the terminal voltage U of T1N with the A phase voltage
PeaBe positive polarity, then on the one hand whether the electric current that flows through forward thyristor T1P be reduced to zero and continue to detect; On the other hand, simultaneously the phase place of stand-by power supply is detected.If the phase place of stand-by power supply is changing to and the same phase front of electrical network phase place; The electric current of forward thyristor T1P of flowing through has been reduced to zero; Represent that then thyristor T1P turn-offs fully; Forward, reverse two thyristor T2Ps, the T2N of master controller in the A phase power line that is connected stand-by power supply sends triggering signal, control thyristor T2P, T2N triggering and conducting.If be reduced to before zero at the electric current that flows through forward thyristor T1P; Stand-by power supply becomes and the line voltage homophase; Then at first the forward thyristor T2P in the A phase power line that is connected stand-by power supply sends triggering signal, and when treating the current over-zero of the forward thyristor T1P in the power network line, the reverse thyristor T2N in the A phase power line that is connected stand-by power supply sends triggering signal again; Control reverse thyristor T2N triggering and conducting, accomplish the handoff procedure of this phase power circuit.In like manner, if detect terminal voltage U through voltage check device V1
PeaBe negative polarity; Then at first detect the electric current that flows through reverse thyristor T1N and whether be reduced to zero; If be reduced to zero, represent that then thyristor T1P, T1N turn-off fully, forward, reverse two thyristor T2P, the T2N in the A phase power line that is connected stand-by power supply sends triggering signal through master controller; Control thyristor T2P, T2N triggering and conducting, accomplish the handoff procedure of this phase power circuit.If be reduced to before zero at the electric current that flows through reverse thyristor T1N, stand-by power supply has become and the line voltage homophase, and then at first the reverse thyristor T2N in the A phase power line that is connected stand-by power supply sends triggering signal, controls reverse thyristor T2N conducting; When the electric current of waiting to flow through the reverse thyristor T1N in the power network line is reduced to zero; Forward thyristor T2P in the A phase power line that is connected stand-by power supply sends triggering signal again; Control forward thyristor T2P triggering and conducting, accomplish the handoff procedure of this phase power circuit.The control mode of B, C two phases is identical, and present embodiment is not done repeat specification at this.
The whole handoff procedure time spent is less than 1/4 cycle, uninterrupted power supply that can proof load.When the line voltage as main power source recovers just often; Solid converting switch is through (this delay time can be provided with through man-machine interaction unit by the technical staff) after the time-delay of 2-3 cycle; Blockade is used for controlling the start pulse signal of each thyristor T2P of stand-by power supply supply line, T2N conducting; And when the current over-zero of each thyristor T2P, T2N, switching to main power source is that load continues power supply.
The master controller of present embodiment can adopt the design of DSP digital signal processor to realize; Through adopting the terminal voltage polarity detection method of reliable voltage detection method and thyristor; And cooperate brand-new switching control strategy; Not only effectively prevent the generation of circulation, and on the basis that guarantees electric power netting safe running, guaranteed the uninterrupted normal operation of load (particularly sensitive loads).
Certainly; The above only is a kind of preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (10)
1. solid converting switch; Being connected to load provides in the supply line in multiple AC source of Alternating Current Power Supply; Be used between the multiple AC source, switching, it is characterized in that: comprise master controller, be used to detect voltage check device and the switch element that multicomponent is not made up of two thyristor reverse parallel connections of the magnitude of voltage of each road AC power; Said voltage check device is connected in AC power and the supply line that switch element is connected; Sampling formation voltage detected value exports described master controller to, and said master controller generates the triggering signal that is used to control the thyristor break-make according to the voltage detecting value that receives; Said switch element is connected in the supply line of each road AC power correspondingly, and the control utmost point of its thyristor connects master controller, receives the triggering signal of master controller output, to carry out the switching of supply line.
2. solid converting switch according to claim 1 is characterized in that: in each bar phase power line of said each road AC power, all be in series with one group of described switch element.
3. solid converting switch according to claim 2; It is characterized in that: in said voltage check device, include the potential-divider network that multicomponent is not composed in series by a plurality of divider resistances; Between each bar phase power line of AC power and ground, be connected one group of described potential-divider network separately, press one of them dividing potential drop node output voltage detected value to the described master controller of network through each component.
4. solid converting switch according to claim 2; It is characterized in that: in the supply line of said each road AC power connection load, all be connected with the current sensing means that is used for AC power is carried out current detecting, said current sensing means output current detection signal to described master controller.
5. solid converting switch according to claim 1 is characterized in that: in said multiple AC source, include No. one main power source and at least one road stand-by power supply, said stand-by power supply and main power source are synchronous.
6. solid converting switch according to claim 1 is characterized in that: in the supply line of said each road AC power connection load, all be connected with the transformer that is used for AC power is carried out decompression transformation.
7. solid converting switch according to claim 1 is characterized in that: after the triggering signal of said master controller output is handled via driver element, export the control utmost point of thyristor to.
8. according to each described solid converting switch in the claim 1 to 7, it is characterized in that: in said solid converting switch, also be provided with man-machine interaction unit, connect described master controller.
9. solid converting switch according to claim 8 is characterized in that: in said man-machine interaction unit, also be provided with the telecommunication module, said telecommunication module is carried out two-way communication with wired or wireless data transmission mode and long-range control centre.
10. according to each described solid converting switch in the claim 1 to 7, it is characterized in that: the two ends at said each group switch element are parallel with a by-pass switch respectively.
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| CN2012200020853U CN202424301U (en) | 2012-01-05 | 2012-01-05 | Solid state change-over switch |
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| CN (1) | CN202424301U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN103762714A (en) * | 2014-01-13 | 2014-04-30 | 深圳市泰永电气科技有限公司 | Switching device for achieving switching control over multiple power systems |
| CN103887871A (en) * | 2014-03-17 | 2014-06-25 | 深圳市泰永电气科技有限公司 | Double-bypass double-power-source conversion switch device |
| CN104901416A (en) * | 2015-06-12 | 2015-09-09 | 武汉华海通用电气有限公司 | Uninterrupted switching device and method for 400Hz intermediate-frequency power supply for ship |
| CN107769367A (en) * | 2017-10-17 | 2018-03-06 | 国网江苏省电力公司盐城供电公司 | Load seamless switching device is pressed in a kind of distribution based on solid-state switch |
| CN110275050A (en) * | 2018-03-13 | 2019-09-24 | 株洲中车时代电气股份有限公司 | A kind of network pressure mutation device and its control method |
| CN113466678A (en) * | 2021-03-17 | 2021-10-01 | 中国人民解放军海军工程大学 | Quick detection device of heterogeneous change over switch trouble of heavy current |
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2012
- 2012-01-05 CN CN2012200020853U patent/CN202424301U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN103762714A (en) * | 2014-01-13 | 2014-04-30 | 深圳市泰永电气科技有限公司 | Switching device for achieving switching control over multiple power systems |
| CN103762714B (en) * | 2014-01-13 | 2018-03-13 | 深圳市泰永电气科技有限公司 | A kind of switching device for being used to realize multiple power-supply system switching controls |
| CN103887871A (en) * | 2014-03-17 | 2014-06-25 | 深圳市泰永电气科技有限公司 | Double-bypass double-power-source conversion switch device |
| CN103887871B (en) * | 2014-03-17 | 2016-03-09 | 深圳市泰永电气科技有限公司 | A kind of two bypass dual-power conversion switch device |
| CN104901416A (en) * | 2015-06-12 | 2015-09-09 | 武汉华海通用电气有限公司 | Uninterrupted switching device and method for 400Hz intermediate-frequency power supply for ship |
| CN107769367A (en) * | 2017-10-17 | 2018-03-06 | 国网江苏省电力公司盐城供电公司 | Load seamless switching device is pressed in a kind of distribution based on solid-state switch |
| CN107769367B (en) * | 2017-10-17 | 2023-12-22 | 国网江苏省电力公司盐城供电公司 | Distribution network medium-voltage load seamless switching device based on solid-state switch |
| CN110275050A (en) * | 2018-03-13 | 2019-09-24 | 株洲中车时代电气股份有限公司 | A kind of network pressure mutation device and its control method |
| CN110275050B (en) * | 2018-03-13 | 2021-10-26 | 株洲中车时代电气股份有限公司 | Network voltage mutation device and control method thereof |
| CN113466678A (en) * | 2021-03-17 | 2021-10-01 | 中国人民解放军海军工程大学 | Quick detection device of heterogeneous change over switch trouble of heavy current |
| CN113466678B (en) * | 2021-03-17 | 2024-02-13 | 中国人民解放军海军工程大学 | High-current multiphase change-over switch fault rapid detection device |
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