CN203537360U - Intelligent solid state transfer switch and transfer switch control system - Google Patents
Intelligent solid state transfer switch and transfer switch control system Download PDFInfo
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- CN203537360U CN203537360U CN201320687760.5U CN201320687760U CN203537360U CN 203537360 U CN203537360 U CN 203537360U CN 201320687760 U CN201320687760 U CN 201320687760U CN 203537360 U CN203537360 U CN 203537360U
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Abstract
The utility model provides an intelligent solid state transfer switch and a transfer switch control system applying the same. Two sets of parallelly connected thyristors are fixedly arranged between an upper end plate and a lower end plate. Each set of thyristors comprises a plurality of serially connected thyristors, wherein the numbers of the serially connected thyristors of the two sets of parallelly connected thyristors are same. Each pair of thyristors which correspond with the two sets of parallelly connected thyristors is parallelly connected reversely. Each pair of thyristors is connected with a static equalizing resistor and a dynamic equalizing unit. The static equalizing resistors are successively connected in series, and the dynamic equalizing units are serially connected in series. A plurality of TE boards respectively perform gate electrode connection control on each thyristor of each pair of thyristors. Each TE board is connected with an energy acquiring coil. A high-frequency energy transmitting power supply outputs AC square waves through a high-voltage energy transmitting cable. Triggering driving energy is supplied to the TE boards through induction of the energy acquiring coils. The intelligent solid state transfer switch has advantages of compact structure and reasonable layout and can realize switching off, switching on and quick switching of a 10KV electric power system line. Furthermore the intelligent solid state transfer switch has the following advantages: high intelligence, self diagnosis, soft switching-on, soft switching-off, no electric arc, no noise, no mechanical fatigue, etc.
Description
Technical field
The utility model relates to the power supply of electric power system or the circuit arrangement of distribution, especially has the intelligent solid conversion switch of auto-conversion function, and thyristor is one of core parts wherein.
Background technology
Electric and electronic technical field forms suitable scale in the world.Compare with other industrial classes, although the time that it occurs in science and technology field is also very short, yet it is huge that it has played a part in current industrial automation, is the important interface between information industry and conventional industries, it is the bridge contacting between forceful electric power and light current.Its development, for electromechanical integration has been opened up new road, is saves energy significantly, reduces raw materials consumption, and new important means are provided.
Development along with power electronic technology, especially the parameter of power semiconductor device is, the improve of performance, the application of power electronic technology is flourish, various power electronic equipments are widely used in various fields, electric power control, Aero-Space, the energy, traffic, electrochemistry, electric heating, high-performance power supply, household electrical appliances and other manufacturing industry etc.It is also a key areas of power electronic technology application that electric power is controlled, wherein utilize power electronic device as power switch, realizing turning on and off of power circuit is the basic function that electric power is controlled, its outstanding benefit is that power electronic device turn-on and turn-off can not produce electric arc, can not produce noise, as the electronic power switch in alternating current circuit, in conjunction with modern control technology can also realize softly open, soft shutoff, self diagnosis and the very significant effect of other Function, its advantage is that conventional electric power switch cannot possess.。
Electronic power switch based semiconductor conductive mechanism, contactless, without the action of electric arc, machinery-free, therefore do not have mechanical fatigue and noise producing, be conducive to improve working life and reduce noise pollution.Owing to can softly open, soft shutoff, can make power circuit and electric equipment exempt from surge current and impact, quite meaningful to protection power circuit and power equipment.
Electronic power switch utilizes semiconductor device to replace as power switch or transforms traditional mechanical diverter switch, the intrinsic problem of conventional mechanical switch will effectively be solved, greatly improve the useful life of switch speed and switch, to meet responsive and the harsh requirement of critical loads to power supply reliability and the quality of power supply.
Summary of the invention
The utility model provides a kind of intelligent solid conversion switch, its core building block is power electronic device-thyristor, utilize this semiconductor device to substitute traditional mechanical switch as power switch, realize 10KV circuit on power system shutoff, open, the function such as switching fast, the intrinsic problem such as the switch speed that solves conventional mechanical switch is slow, useful life is short, the low and quality of power supply is poor to the power supply reliability of sensitivity and critical loads.
For addressing the above problem, scheme of the present utility model is:
Intelligent solid conversion switch, comprises
Upper head plate and bottom plate and a plurality of insulated tension poles that are connected upper and lower end plate;
Between upper and lower end plate, be fixedly installed the thyristor of two groups of parallel connections, every group of thyristor that comprises a plurality of series connection that quantity equates, every pair of corresponding thyristor of two groups of thyristors is reverse parallel connections all also;
Every pair of thyristor is also parallel with a static voltage sharing and a dynamic voltage balancing unit being comprised of a dynamic voltage balancing resistance and a dynamic voltage balancing capacitances in series; Each static voltage sharing is series connection successively also, and each dynamic voltage balancing unit is all series connection successively also;
Also comprise a plurality of TE plates, the gate pole of each thyristor of every pair of thyristor connects respectively control by a TE plate; Each TE plate is also connected with one and gets energy coil, also comprises the high force feed energy cable that a high frequency send energy power supply and is electrically connected to it, and high force feed energy cable is got energy coil through each; High frequency send can power supply by high force feed energy cable output AC square wave, through getting, can coil be sensed as TE plate triggering driving-energy be provided;
Further, between every group of thyristor and upper head plate, be also provided with one group and provide the top laminated structure group of pressure assembling force for thyristor, every group of top laminated structure group comprises that one is positioned at the stage clip guide pillar of below, stage clip guide column sleeve has a plurality of disk springs, the bottom of disk spring butt one stage clip guide pin bushing, stage clip guide pin bushing has external screw thread and interior guide hole, stage clip guide pillar top correspondence penetrates in the interior guide hole of stage clip guide pin bushing, stage clip guide pin bushing top penetrates the corresponding through hole arranging of upper head plate, stage clip guide pin bushing also overlaps adjusting nut, adjusting nut is positioned at upper head plate below and meshes with the external screw thread of stage clip guide pin bushing, turn adjusting nut can make its butt and upper head plate lower surface.
Further, also comprise a plurality of radiators, the radiator of two its heats of conduction of the corresponding contact of each thyristor, and each radiator is also linked in circuit and conducts electricity.
Further, described dynamically, static voltage sharing is glass glaze film resistance, described dynamic voltage balancing electric capacity is thin-film capacitor.
Further, described each static voltage sharing is erects the side that shape is installed on one group of thyristor from top to bottom successively, and two adjacent static voltage sharings are parallel to each other and head and the tail are corresponding.Described dynamic voltage balancing resistance and dynamic voltage balancing electric capacity are installed on the same side of two groups of thyristors, and dynamic voltage balancing capacitance profile both sides, and in the middle of dynamic voltage balancing resistance is positioned at, each dynamic voltage balancing resistance is horizontal from top to bottom to be installed successively.This horizontal stroke, extended spread form had not only met electric connection and insulating requirements but also had saved arrangement space, made whole intelligent solid conversion switch compact conformation, unification.
Further, described every group of thyristor comprises five thyristors; Realize 10KV circuit on power system shutoff, open and switch fast.
The present invention also provides the processing method of intelligent solid conversion switch:
The first step, is fixed on bottom plate on supporting tool, then 8 insulation blanket studs and 8 insulating nuts and 8 insulation setscrew nuts is tightened on bottom plate; Then, again 8 insulation setscrew nuts are screwed on 8 insulation blanket studs, adjust the position of insulation setscrew nut, the distance that makes upper and lower end plate is 640.5mm, upper head plate is placed on insulation setscrew nut, and with insulating nut, tighten fixedly, guarantee that the depth of parallelism of upper head plate and bottom plate is within 0.2mm; Valve body frame assembly assembling is now complete, and making it is a framework integral body.
Second step, that cushion block is placed in valve body lower end plate seam by seam, then the heart is put into alignment pin therein, lower end busbar is put into alignment pin, then put into successively radiator, centralized positioning pin, thyristor, centralized positioning pin, radiator, thyristor etc., finally upper end busbar is put into alignment pin, now thyristor groups and radiator panel install.
The 3rd step, is that top laminated structure assembly is fixed on the busbar of upper end by centralized positioning pin, and adjusting nut is placed on to the most loose position, prepares to press-fit.
The 4th step, that the valve body assembling is put in hydraulic press, install and press guide pillar, be inserted in disk spring, put the stage clip guide pin bushing of spinning adjusting nut, the pressure assembling force of hydraulic press is adjusted to 40KN, start hydraulic press, by pressing down stage clip guide pin bushing compression disk spring, then rotate adjusting nut, adjusting nut is pressed on upper head plate; Then, unclamp hydraulic press, now valve string press-fits completely, then according to above-mentioned steps, other one group of valve string has been press-fited.
The 5th step is with dynamic voltage balancing resistance and be connected strutting piece and be screwed on radiator successively by dynamic voltage balancing electric capacity.
The 6th step is that static voltage sharing and connection strutting piece thereof are screwed on radiator successively.
The 7th step is to be fixed on upper head plate and bottom plate getting the insulation angle steel of energy assembly by its both sides.
The 8th step is that TE board component is fixed on upper head plate and bottom plate by support gusset and 2 sides insulation angle steel.So far assemble complete.
The utility model also provides two kinds of change over switch control system versions using above-mentioned intelligent solid conversion switch,
One is active and standby two-way formula change over switch control system, between connecing power supply (power supply I road) and stand-by power supply (power supply II road) and load, the master of 10KV is connected with respectively a road circuit, every road circuit is comprised of a circuit breaker of connecting successively, an isolating switch, an intelligent solid conversion switch and an isolating switch, between the isolating switch output of the two-way before load input, be also connected in series successively an isolating switch, an intelligent solid conversion switch and an isolating switch, described each intelligent solid conversion switch is a mechanical type by-pass switch in parallel also.
It two is one-way change over switch control system, between the power supply of 10KV and load, be in series with successively a circuit breaker, an intelligent solid conversion switch and a three-phase transformer, three-phase transformer is converted to 380V for load power supply by power supply, and intelligent solid conversion switch is also parallel with respectively a mechanical type by-pass switch and a lightning arrester.
Advantage and the good effect that the utlity model has are: compact conformation, rationally distributed, the horizontal and vertical arrangement of vibrating capacitor and resistor had not only met electric connection and insulating requirements but also had saved arrangement space, made whole intelligent solid conversion switch compact conformation, unification.The press mounting structure framework being comprised of the insulation blanket stud of 8 16mm and 32 insulating nuts is firm, reliable.Utilize semiconductor device to replace as power switch or transform traditional mechanical switch, can realize 10KV circuit on power system shutoff, open, switch fast, and possess intellectuality, self diagnosis, softly open, soft shutoff, without the feature of electric arc, noiseless, machinery-free fatigue etc.Conversion that it is contactless, without the action of electric arc, machinery-free, there is no mechanical fatigue and noise producing, be conducive to improve working life and reduce noise pollution.Can improve electric power system reliability of operation, and there is good stability and durability, and can effectively solve the intrinsic problem of conventional mechanical switch, greatly improve the useful life of switch speed and switch, to meet responsive and the harsh requirement of critical loads to power supply reliability and the quality of power supply.
Accompanying drawing explanation
Fig. 1 is that the structure master of intelligent solid conversion switch looks schematic diagram
Fig. 2 is that schematic diagram is looked on a left side
Fig. 3 is that schematic diagram is looked on the right side
Fig. 4 is that main apparent direction is main schematic perspective view, the schematic perspective view that upper right side is watched in the past
Fig. 5 is that rear apparent direction is main schematic perspective view, after the schematic perspective view watched from rear left top
Fig. 6 is the circuit theory diagrams of intelligent solid conversion switch
In figure: 1, upper head plate; 3, bottom plate; 4, lip block; 6, insulated tension pole; 7, insulating nut; 8, insulation setscrew nut; 9, upper end busbar; 10, lower end busbar; 11, adjusting nut; 12, stage clip guide pin bushing; 13, disk spring; 14, stage clip guide pillar; 15, dynamic voltage balancing resistance; 16, dynamic voltage balancing electric capacity; 17, thyristor; 18, radiator; 19, post insulator; 21, insulator fixed head; 23, static voltage sharing; 24, high frequency send energy power supply; 25, coil brace; 26, high force feed energy cable; 27, get energy coil; 28, TE plate; 29, TE plate bracing frame; 30, support gusset; 31, insulation angle steel; 32, fixing aluminum corner brace
Fig. 7 is the circuit theory diagrams of active and standby two-way formula change over switch control system, CB1, CB2 are circuit breaker, IS1, IS2, IS3, IS4, IS5, IS6 are isolating switch, PS1, PS2, PS3 are mechanical type by-pass switch (fast vacuum switch), and TS1, TS2, TS3 are thyristor valve switch (being intelligent solid-state diverter switch).
Fig. 8 a and 8b are the circuit theory diagrams of one-way change over switch control system, and what show respectively is soft opening and soft shutoff two states
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.
The core building block of intelligent solid conversion switch of the present utility model is thyristor, and as shown in the circuit theory diagrams of Fig. 1 to Fig. 5 and Fig. 6, this intelligent solid conversion switch comprises
Upper head plate 1 and bottom plate 3 and a plurality of insulated tension poles 6 that are connected upper and lower end plate;
Insulated tension pole assembly, its effect is to bear the pressure assembling force that in the laminated structure assembly of top, butterfly spring applies by upper and lower end plate, is the critical component of switch, it is comprised of the insulation blanket stud of 8 M16 and 16 M16 insulating nuts and 16 M16 supports insulative nuts.As shown in Figures 1 to 5, its power of bearing is 40KN.Its most important feature is that the pull bar of 8 all insulations bears electric stress and bear again mechanical stress, and the fire resistance of insulated tension pole is UL94-V0 level.
Between upper and lower end plate, be fixedly installed the thyristor of two groups of parallel connections, as shown in Figure 6, every group of thyristor that comprises a plurality of series connection that quantity equates, every pair of corresponding thyristor of two groups of thyristors is reverse parallel connections all also; The maximum current capacity of thyristor groups is 630A.Its effect is to open and cut-off current, by triggering just antiparallel 2 gate circuit transistor gates, realizes opening, switch and turn-offing of power circuit.
As shown in Figure 6, every pair of thyristor is also parallel with a static voltage sharing and a dynamic voltage balancing unit being comprised of a dynamic voltage balancing resistance and a dynamic voltage balancing capacitances in series; Each static voltage sharing is series connection successively also, and each dynamic voltage balancing unit is all series connection successively also; Further, described dynamically, static voltage sharing is glass glaze film resistance, described dynamic voltage balancing electric capacity is thin-film capacitor.
In the present embodiment, by 5 glass glaze film resistances and 5 thin-film capacitors and conducting bracket thereof, form dynamic voltage balancing assembly, its effect is when intelligent solid conversion switch thyristor valve transient state is opened and turn-offed, and positive anti-parallel thyristor is all pressed.It is the due to voltage spikes that stray inductance produces while utilizing the electric capacity in parallel with positive anti-parallel thyristor to absorb thyristor to turn-off, and with the resistance effect of capacitor's series be the energy of consumption overvoltage.
The assembly that static voltage sharing and conducting bracket thereof form, effect is when intelligent solid conversion switch thyristor valve steady operation, and positive anti-parallel thyristor level is all pressed.
Also comprise a plurality of TE plates, as shown in Figure 6, the gate pole of each thyristor of every pair of thyristor connects respectively control by a TE plate; The effect of TE plate is the control strategy requirement according to intelligent solid conversion switch control system, triggers the gate pole of each thyristor in intelligent solid conversion switch, makes thyristor valve open, switch.It is also the core component of intelligent solid conversion switch thyristor valve, is the bridge connecting between forceful electric power and control system light current.The present embodiment comprises that 5 blocks of TE plates and support frame thereof form.
As shown in Figure 6, each TE plate is also connected with one and gets energy coil, also comprises the high force feed energy cable that a high frequency send energy power supply and is electrically connected to it, and high force feed energy cable is got energy coil through each; High frequency send can power supply by high force feed energy cable output AC square wave, through getting, can coil be sensed as TE plate triggering driving-energy be provided;
As shown in Figures 1 to 5, in the present embodiment, provide by 1 high frequency send can power supply, 1 high force feed energy cable and 10 get can coil and getting of forming of coil brace can assembly, its high frequency send the ac square wave of the exportable 15A frequency of energy power supply up to 100KHZ.The effect of getting energy assembly is to obtain enough energy to supply with thyristor triggering drive circuit.In addition, its most important effect is isolation forceful electric power high-pressure system and light-current system, and high electronegative potential can well be isolated.
As shown in Figures 1 to 5, between every group of thyristor and upper head plate, be also provided with one group and provide the top laminated structure group of pressure assembling force for thyristor, every group of top laminated structure group comprises that one is positioned at the stage clip guide pillar of below, stage clip guide column sleeve has a plurality of disk springs, the bottom of disk spring butt one stage clip guide pin bushing, stage clip guide pin bushing has external screw thread and interior guide hole, stage clip guide pillar top correspondence penetrates in the interior guide hole of stage clip guide pin bushing, stage clip guide pin bushing top penetrates the corresponding through hole arranging of upper head plate, stage clip guide pin bushing also overlaps adjusting nut, adjusting nut is positioned at upper head plate below and meshes with the external screw thread of stage clip guide pin bushing, turn adjusting nut can make its butt and upper head plate lower surface.
Stage clip guide pillar, adjusting nut, stage clip guide pin bushing, dish spring group form top laminated structure group, and its effect is by butterfly spring, produces enough pressure assembling forces, and make thyristor and radiator valve string keep stable, are beneficial to conduction and heat conduction.According to the requirement of thyristor pressure assembling force, the pressure assembling force that dish spring group produces is 40KN.
Further, also comprise a plurality of radiators 18, the radiator of two its heats of conduction of the corresponding contact of each thyristor, and each radiator is also linked in circuit and conducts electricity.
The heat sink assembly that a plurality of radiators form, effect be conduction thyristor open and turn off process in the heat that produces, prevent from surpassing the high workload junction temperature of thyristor.Its other effect is conduction.The maximum steady state electric current of its conducting is 630A.In the present embodiment, radiator panel is comprised of 12 radiators, and each can 2 radiators of corresponding contact just to make 10 thyristors.
As shown in Figures 1 to 5, described each static voltage sharing is erects the side that shape is installed on one group of thyristor from top to bottom successively, and two adjacent static voltage sharings are parallel to each other and head and the tail are corresponding.Described dynamic voltage balancing resistance and dynamic voltage balancing electric capacity are installed on the same side of two groups of thyristors, and dynamic voltage balancing capacitance profile both sides, and in the middle of dynamic voltage balancing resistance is positioned at, each dynamic voltage balancing resistance is horizontal from top to bottom to be installed successively.This horizontal stroke, extended spread form had not only met electric connection and insulating requirements but also had saved arrangement space, made whole intelligent solid conversion switch compact conformation, unification.
Further, described every group of thyristor comprises five thyristors; Realize 10KV circuit on power system shutoff, open and switch fast.
Upper and lower end plate and back-up block etc. form valve body frame set, and their effect is to support thyristor groups and radiator panel and other electric component, and each thyristor and radiator is applied to the pressure assembling force of regulation by top laminated structure group.
Also include conductive bus bar assembly, connect soft busbar be comprised of the soft busbar of upper and lower side and each positive anti-parallel thyristor cascade, its effect is to be connected with contact arm at intelligent solid conversion switch thyristor valve two ends, then is electrically connected by contact arm and bus.
Also comprise supporting component, it is comprised of 2 post insulators 19 and fixed head 21, and its effect is to support each assembly of intelligent solid conversion switch, and thyristor valve electric part is insulated.
The assemble method of whole intelligent fixed conversion switch is as follows:
First bottom plate is fixed on supporting tool, then 8 insulation blanket studs and 8 insulating nuts and 8 insulation setscrew nuts is tightened on bottom plate.Then, again 8 insulation setscrew nuts are screwed on 8 insulation blanket studs, adjust the position of insulation setscrew nut, the distance that makes upper and lower end plate is 640.5mm, upper head plate is placed on insulation setscrew nut, and with insulating nut, tighten fixedly, guarantee that the depth of parallelism of upper head plate and bottom plate is within 0.2mm.Valve body frame assembly assembling is now complete, and making it is a framework integral body.
Second step is that cushion block is placed in valve body lower end plate seam by seam, then, the heart is put into alignment pin therein, lower end busbar is put into alignment pin, then put into successively radiator, centralized positioning pin, thyristor, centralized positioning pin, radiator, thyristor etc., finally upper end busbar is put into alignment pin, now thyristor groups and radiator panel install.
The 3rd step is that top laminated structure assembly is fixed on the busbar of upper end by centralized positioning pin, and adjusting nut is placed on to the most loose position, prepares to press-fit.
The 4th step is that the valve body assembling is put in hydraulic press, install and press guide pillar, be inserted in disk spring, put the stage clip guide pin bushing of spinning adjusting nut, the pressure assembling force of hydraulic press is adjusted to 40KN, start hydraulic press, by pressing down stage clip guide pin bushing compression disk spring, then rotate adjusting nut, adjusting nut is pressed on upper head plate; Then, unclamp hydraulic press, now valve string press-fits complete.In like manner, according to above-mentioned steps, other valve string has been press-fited.
The 5th step is with dynamic voltage balancing resistance and be connected strutting piece and be screwed on radiator successively by dynamic voltage balancing electric capacity.
The 6th step is that static voltage sharing and connection strutting piece thereof are screwed on radiator successively.
The 7th step is to be fixed on upper head plate and bottom plate getting the insulation angle steel of energy assembly by its both sides.
The 8th step is that TE board component is fixed on upper head plate and bottom plate by support gusset and 2 sides insulation angle steel.So far assemble complete.
The utility model also provides two kinds of change over switch control system versions using above-mentioned intelligent solid conversion switch,
One is active and standby two-way formula change over switch control system, for improving power supply reliability, guarantee to realize the uninterrupted power supply of sensitive load in the situation that transient power quality decline is fallen, jumped and have a power failure in short-term as instantaneous voltage, guarantee responsible consumer normal power supply, must take and reliability higher technical measures faster than conventional automatic closing speed to meet sensitivity and the strict demand of critical load to power supply reliability and the quality of power supply.In conjunction with solving at present the effective way of transient power quality problem both at home and abroad, adopt intelligent solid-state diverter switch technology, intend the scheme with active and standby duplex feeding, two users' three switch units, its topological form is as shown in Figure 7.
Between connecing power supply (power supply I road) and stand-by power supply (power supply II road) and load, the master of 10KV is connected with respectively a road circuit, every road circuit is comprised of a circuit breaker of connecting successively, an isolating switch, an intelligent solid conversion switch and an isolating switch, between the isolating switch output of the two-way before load input, be also connected in series successively an isolating switch, an intelligent solid conversion switch and an isolating switch, described each intelligent solid conversion switch is a mechanical type by-pass switch in parallel also.
As from the foregoing, this system comprises 3 switch units, and each switch unit is mainly intelligent solid converting switch by Quick mechanical switch P S and thyristor valve switch TS() form.For maintenance safety and convenient under load live state, each switch unit into and out of line end 1 isolating switch of respectively connecting.
During normal steady-state supply, CB1, CB2, IS1, IS2, IS3, IS4, IS5, IS6, PS1, PS2 are all closed, PS3 disjunction, TS1, TS2 keep triggering, TS3 triggers and blocks (off-state), the power supply of the I road direction of now powering load I section, the power supply of power supply II road direction load II section, two current supply circuits are separate.
When voltage sag or power down appear in power supply I road, PS1 separating brake, TS1 trigger and block (off-state), and TS3 triggers release, and PS3 closes a floodgate immediately, and load I section is switched to by power supply II road and is powered, and the II road that powers is simultaneously to load I section and the power supply of II section.After power supply I road voltage recovers normally, by PS3 separating brake, TS3 triggers and blocks (off-state), and TS1 triggers release, with being about to PS1, closes a floodgate, and load I section is switched back to by the I road that powers and powered.In like manner, when power supply II road occur that instantaneous voltage falls or during power down PS2 separating brake, TS2 triggers blockades, TS3 triggers release, with being about to PS3, closes a floodgate, and load II section is switched to by the I road that powers and is powered, the I road while of powering powers to load I section and II section.After power supply II road voltage recovers normally, by PS3 separating brake, TS3 triggers blockade, and TS2 triggers release, with being about to PS2, closes a floodgate, and load II section is switched back to by power supply II road and powered.
The another kind of system form that the utility model provides is: one-way change over switch control system,
As shown in Fig. 8 a and Fig. 8 b, between the power supply of 10KV and load, be in series with successively a circuit breaker, an intelligent solid conversion switch and a three-phase transformer, three-phase transformer is converted to 380V for load power supply by power supply, and intelligent solid conversion switch is also parallel with respectively a mechanical type by-pass switch and a lightning arrester.
This system can realize basic soft opening and soft turn-off function, particularly:
Soft open-minded:
As shown in Figure 8 a, when 10KV power circuit is opened (when 10KV electric power system is to the power supply of 10KV three-phase transformer, three-phase transformer transformation is that 380V gives load power supply).First close CB circuit breaker, then, by control system, allow the slow conducting of TS power, through 10-20 after second, then by the closed PS switch of control system program, control program disconnects by TS simultaneously.This is the soft technology of opening, and can make power transformer exempt from that exiting pour current impacts and extend CB circuit breaker useful life, is conducive to adjusting of overcurrent protection, quite meaningful for protection power transformer, power circuit and power equipment.Can make the life of transformer and circuit breaker more than 5 times.
Soft shutoff:
As shown in Figure 8 b, when 10KV power circuit disconnects, first by control system, allow TS triggering and conducting, in TS conducting by control system program by the disjunction of PS switch, at PS switch, divide and have no progeny, by program by TS disjunction, and then by the disjunction of CB circuit breaker.This is soft turn-off technique, can make TS switch and CB circuit breaker when disjunction circuit, lifts one's head and does not have electric arc to produce, and extends TS switch and CB circuit breaker useful life, can make the life of switch and circuit breaker more than 10 times.
Intelligent solid conversion switch is arranged in electric power system, it is arranged in an electric power system before power transformer, become a switched system with turnover bus cabinet, change over switch cabinet, breaker cabinet and control system group, this system is comprised of intelligent solid conversion switch, electric isolating switch, vacuum circuit-breaker, current transformer, voltage transformer, valve arrester, earthed switch and intelligent solid conversion switch control cubicle etc.
Intelligent solid-state conversion is opened and is mainly used in opening, switch, turn-offing of power circuit.When opening power circuit, utilize that it is softly opened, the performance of soft shutoff, can make power transformer exempt from exiting pour current and impact, be conducive to adjusting of overcurrent protection, quite meaningful for protection power transformer, power circuit and power equipment.
In the higher industry of power reguirements, as semiconductor manufacturing industry, chemical enterprise, automatic control system that some is produced, hospital, power plant and other have use the electric unit of precision instrument, it is used as backup switching and the conversion of power supply, is optimal scheme.
In quality power garden, traditional mechanical switch switch is used instead after intelligent solid conversion switch, utilize its supper-fast translation function, can solve the quick conversion between the above supply line of two-way, thereby the voltage having solved in the high-tech industry quality of power supply falls problem, nearly all quality power garden scheme all expects to adopt solid-state electronic power switch.
Above embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the utility model scope and improvement etc., within all should still belonging to this patent covering scope.
Claims (7)
1. an intelligent solid conversion switch, upper head plate and bottom plate and a plurality of insulated tension poles that are connected upper and lower end plate, is characterized in that, comprising:
Between upper and lower end plate, be fixedly installed the thyristor of two groups of parallel connections, every group of thyristor that comprises a plurality of series connection that quantity equates, every pair of corresponding thyristor of two groups of thyristors is reverse parallel connections all also;
Every pair of thyristor is also parallel with a static voltage sharing, a dynamic voltage balancing unit being comprised of a dynamic voltage balancing resistance and a dynamic voltage balancing capacitances in series; Each static voltage sharing is series connection successively also, and each dynamic voltage balancing unit is all series connection successively also;
Also comprise a plurality of TE plates, the gate pole of each thyristor of every pair of thyristor connects respectively control by a TE plate;
Each TE plate is also connected with one and gets energy coil;
Also comprise the high force feed energy cable that a high frequency send energy power supply and is electrically connected to it, high force feed energy cable is got energy coil through each; High frequency send can power supply by high force feed energy cable output AC square wave, through getting, can coil be sensed as TE plate triggering driving-energy be provided.
2. change over switch according to claim 1, it is characterized in that: between every group of thyristor and upper head plate, be also provided with one group and provide the top laminated structure group of pressure assembling force for thyristor, every group of top laminated structure group comprises that one is positioned at the stage clip guide pillar of below, stage clip guide column sleeve has a plurality of disk springs, the bottom of disk spring butt one stage clip guide pin bushing, stage clip guide pin bushing has external screw thread and interior guide hole, stage clip guide pillar top correspondence penetrates in the interior guide hole of stage clip guide pin bushing, stage clip guide pin bushing top penetrates the corresponding through hole arranging of upper head plate, stage clip guide pin bushing also overlaps adjusting nut, adjusting nut is positioned at upper head plate below and meshes with the external screw thread of stage clip guide pin bushing, turn adjusting nut can make its butt and upper head plate lower surface.
3. change over switch according to claim 1, is characterized in that: also comprise a plurality of radiators, each thyristor is corresponding contacts two radiators that conduct its heats, and each radiator is also linked in circuit and conducts electricity.
4. change over switch according to claim 1, is characterized in that:
Described each static voltage sharing is erects the side that shape is installed on one group of thyristor from top to bottom successively, and two adjacent static voltage sharings are parallel to each other and head and the tail are corresponding; Described dynamic voltage balancing resistance and dynamic voltage balancing electric capacity are installed on the same side of two groups of thyristors, and dynamic voltage balancing capacitance profile both sides, and in the middle of dynamic voltage balancing resistance is positioned at, each dynamic voltage balancing resistance is horizontal from top to bottom to be installed successively.
5. change over switch according to claim 1, is characterized in that: described every group of thyristor comprises five thyristors.
6. active and standby two-way formula change over switch control system, comprises the intelligent solid conversion switch as described in claim 1 to 5 any one, it is characterized in that:
The master of 10KV, connect and between power supply and stand-by power supply and load, be connected with respectively a road circuit, every road circuit is comprised of a circuit breaker of connecting successively, an isolating switch, an intelligent solid conversion switch and an isolating switch, between the isolating switch output of the two-way before load input, be also connected in series successively an isolating switch, an intelligent solid conversion switch and an isolating switch, described each intelligent solid conversion switch is a mechanical type by-pass switch in parallel also.
7. one-way change over switch control system, comprises the intelligent solid conversion switch as described in claim 1 to 5 any one, it is characterized in that:
Between the power supply of 10KV and load, be in series with successively a circuit breaker, an intelligent solid conversion switch and a three-phase transformer, three-phase transformer is converted to 380V for load power supply by power supply, and intelligent solid conversion switch is also parallel with respectively a mechanical type by-pass switch and a lightning arrester.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320687760.5U CN203537360U (en) | 2013-10-31 | 2013-10-31 | Intelligent solid state transfer switch and transfer switch control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320687760.5U CN203537360U (en) | 2013-10-31 | 2013-10-31 | Intelligent solid state transfer switch and transfer switch control system |
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| CN203537360U true CN203537360U (en) | 2014-04-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560774A (en) * | 2013-10-31 | 2014-02-05 | 天津市泓诚泰科技发展有限公司 | Intelligent solid state transfer switch, processing method thereof and transfer switch control system |
| CN106533203A (en) * | 2016-11-25 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | High-voltage large-power thyristor series connection assembly |
| US10439393B2 (en) | 2016-10-31 | 2019-10-08 | General Electric Company | Switch systems for controlling conduction of multi-phase current |
-
2013
- 2013-10-31 CN CN201320687760.5U patent/CN203537360U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560774A (en) * | 2013-10-31 | 2014-02-05 | 天津市泓诚泰科技发展有限公司 | Intelligent solid state transfer switch, processing method thereof and transfer switch control system |
| CN103560774B (en) * | 2013-10-31 | 2016-03-02 | 天津市泓诚泰科技发展有限公司 | Intelligent solid conversion switch and processing method thereof and change over switch control system |
| US10439393B2 (en) | 2016-10-31 | 2019-10-08 | General Electric Company | Switch systems for controlling conduction of multi-phase current |
| CN106533203A (en) * | 2016-11-25 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | High-voltage large-power thyristor series connection assembly |
| CN106533203B (en) * | 2016-11-25 | 2023-06-16 | 云南电网有限责任公司电力科学研究院 | A high-voltage high-power thyristor series assembly |
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