CN202495773U - Intelligent reactive power compensation device based on single tripolar synchronous switch - Google Patents
Intelligent reactive power compensation device based on single tripolar synchronous switch Download PDFInfo
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- CN202495773U CN202495773U CN 201220143207 CN201220143207U CN202495773U CN 202495773 U CN202495773 U CN 202495773U CN 201220143207 CN201220143207 CN 201220143207 CN 201220143207 U CN201220143207 U CN 201220143207U CN 202495773 U CN202495773 U CN 202495773U
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Abstract
The utility model provides an intelligent reactive power compensation device based on a single tripolar synchronous switch, which is characterized in that: a capacitor bank comprises an electric reactor and a capacitor connected in a triangle circuit form, three main contacts of a tripolar synchronous switch K1 are arranged in the triangle circuit and are connected with the capacitor bank in series, a pre-charging circuit 1 is connected in parallel between the input end and output end of a main contact; a pre-charging circuit 2 is connected in parallel between the input end and output end of another main contact; the line voltage of a power grid pre-charges the capacitor group through the pre-charging circuit 1 and the pre-charging circuit 2; a phase position control device switches on and switches off the three main contacts of the tripolar synchronous switch K1 at the same time according to a preset phase position angle of the voltage of the power grid to switch the capacitor group, and a CT is used for detecting the sum of current in the triangle circuit and providing unbalance protection. Experimental waves show that the device is good in switching electrical effect, environment-friendly, energy-saving, simple in structure, economical and practical, and can be conveniently applied to engineering in a large scale.
Description
Technical field
The utility model relates to reactive power compensation, harmonic and the electrical network power quality controlling field of electric power system, relates to a kind of Intelligent Reactive Compensation Equipment based on separate unit tri-level sync switch particularly.
Background technology
Electrical network needs reactive power compensation to reach stable line voltage, improves power factor, lowers the purpose of line loss.Opening-closing capacitor bank is to realize the main method of reactive power compensation, yet the state of the art of opening-closing capacitor bank allows of no optimist.
In the reactive power compensation field; Have 80% to use the mechanical contact switch switched capacitor approximately; Mechanical contact switch is a triple-pole switch, and three main contactss of triple-pole switch are closed simultaneously, open, at uncertain electric network voltage phase angle switched capacitor at random; Electric current during input surpasses 4 times to 10,20 times of normal rating electric current, causes the line voltage distortion.In addition, also have combined floodgate mechanical contact spring, open the dangerous probability of restriking in the contact, bouncing and restriking makes capacitor group overvoltage, damages capacitor, causes the accident easily.And still have the reason of mass market occupation rate with the mechanical contact switch switched capacitor is that its circuit is simple, and cost is low.
It is found that zero crossing close switch afterwards, and opened switch at current zero-crossing point and come switched capacitor obviously to reduce impulse current, alleged synchro switch technology that Here it is at line voltage.Because the capacitor group is a capacitive load, when electric current was zero opening, line voltage was a peak value; Crest voltage can be kept on the capacitor; When close switch drops into the capacitor group once more, at first need generally adopt discharge coil on the engineering with the charge discharge that stores on the capacitor to zero.Patent document: " synchro switch ", grant number: CN 101510689 adopts additional conductive discharge circuit.When opening capacitor, the energy of storing on the capacitor is 0.5*C*U
2, coil discharge and conductive discharge all are that energy consumption in vain is very unfortunate in power consumption, the epoch cry that lowers consumption with environment protecting and power-saving deviates from.Because discharge needs the time,, be generally a minute level so the switch of opening-closing capacitor bank is long by operate time closed, that be opened to once more closure.Utilize existing synchro switch technology back-to-back during opening-closing capacitor bank, capacitor shoves greatly.
Three utmost point mechanical contact switch are closed simultaneously to be developed with the shortcoming of opening the existence of capacitor group synchro switch in order to overcome.The patent document of the relative synchronous switch that can retrieve, patent document " synchro switch " for example, the patent No.: ZL98808789.8; Patent document: " phase controlling switch device ", application number: 00137229.7; Patent document: " synchro switch ", Granted publication number: CN 101510689; Patent document: " a kind of synchro switch that is used to control the three-phase power capacitor switching ", application number: 201010591708.0 etc., all talk about synchro switch with two or three monopolar synchronous switches realizations.The internationally famous company of power quality controlling comprises that the synchro switch that ABB, Siemens, GE, Schneider, Alstom and domestic each company use is made up of three monopolar synchronous switches mostly in engineering.Three monopolar synchronous on-off ratio separate unit tri-level sync constructions of switch are complicated, and drive circuit is many, and every single-pole switch all needs independently switch coil and drive circuit, the driving complex time.
Combination switch is by the thyristor switch of accurate trigger action and do not have three utmost point mechanical switchs of required precision to form, and parallel connection type combination switch and series type composite switch are arranged.Patent document: " a kind of electronic zero cut-in and cut-off contactor ", application number: 01113435.6 discloses a kind of parallel connection type combination switch, and combination switch is owing to will use thyristor; So it is more than the simple used number of elements of mechanical switch that adopts; Control timing is compared simple employing mechanical switch and is wanted complicated, and parallelly connected combination switch tends to run into mechanical switch and opens on the practical applications, when changing thyristor over to and putting into operation; The di/dt that thyristor bears is excessive, causes the technical barrier of damage.
Patent document: " a kind of series type composite switch circuit of opening-closing capacitor bank "; Granted publication number: CN 1845456B discloses a kind of series type composite switch; After adopting a high voltage silicon stack diode and a high-voltage and current-limitation resistance being connected; Mechanical switch of parallel connection as hanging down the high withstand voltage switch of precision at a slow speed, adopts a thyristor, a diode and a mechanical switch parallel connection as the low withstand voltage switch of quick high accuracy.It is too complicated that series type composite switch circuit is applied in the three-phase circuit structure and control logic, and when mechanical switch was closed, thyristor switch existed dv/dt excessive, the technical barrier that damages easily.Simultaneously, this patent has also proposed a kind of pre-charge circuit of mechanical switch.
Patent document " a kind of 2 controls, 3 precharge phased switch circuit of opening-closing capacitor bank "; Authorize publication number: CN201378738Y; With respect to disclosed series type composite switch in the patent document " a kind of series type composite switch circuit of opening-closing capacitor bank "; Remove the low withstand voltage switch of quick high accuracy of a thyristor, a diode and a mechanical switch parallel connection, simplified circuit.This patent document adopts two independently one pole precharge synchro switches, and control timing is complicated.The negative electrode of two high voltage silicon stack diodes that synchro switch is other or the mains side that anode all is connected on switch.For overcoming the bounce of switch contact, switch ends has increased RC and has absorbed circuit.Though this patent has proposed the quick non-impact current switched capacitor of application precharge synchro switch, the opening-closing capacitor bank technical scheme of obviously not shoving back-to-back,, be to adopt many monopolar synchronous switches to realize.
Thyristor switchable capacitor (TSC) circuit can drop into capacitor accurately, fast in 20ms, and does not have rush of current, the problem of do not have spring, restriking.But middle pressure TSC circuit needs a plurality of thyristor series connection, and there is the tube voltage drop about 2V in the thyristor conducting, and thyristor consumes several kilowatts heat when pressing the TSC circuit turn-on in the cover.So big caloric requirement is dispelled the heat by equipment such as air-cooled, water-cooled, heat pipes.Because the TSC technical difficulty is big, energy consumption is big, cost is high, so only be applied in low-pressure field, it is few that use in middle pressure field.
Patent application document " based on the Intelligent Reactive Compensation Equipment of separate unit tri-level sync switch "; Application number: 201210066279.4; Proposed to adopt the synchro switch that one three utmost point is closed simultaneously, open simultaneously; Through using precharge technology and simultaneous techniques, realize the technical scheme of reactive power compensation at this tri-level sync switch of phase angle switching of predetermined electrical network phase voltage.In this patent application, the main contacts of triple-pole switch is connected with electrical network phase voltage U, V, W respectively, is operated in the phase voltage of electrical network, and the electric current that passes through is a phase current.Yet; The zero potential of the three-phase circuit of sort circuit topology is prone to drift about; The DC potential that each phase capacitor of capacitor group stops is different, may be very high when undesired, as the phenomenon of voltage multiplying rectifier; The current potential that these all can influence the main contacts of tri-level sync switch is unfavorable for the safe operation of system.And when non-equilibrium state appearred in the capacitor group, the electric current summation of three main contactss of synchro switch still equalled zero according to Kirchhoff's current law (KCL), was not easy to observe the uneven situation of capacitor group.
The utility model content
The purpose of the utility model is, on the basis of each technical scheme of above-mentioned switched capacitor, and the comprehensive advantage that absorbs wherein; Overcome inferior position wherein; Proposed a kind of action fast, switching no-flashy-flow, the few or phenomenon of not restriking, the Intelligent Reactive Compensation Equipment of green energy conservation, it can be applicable to each current class of low pressure, middle pressure, high pressure; Be particularly suitable for the low pressure occasion; And simple in structure, economic and practical, be convenient to engineering and widely apply, engineering practice has proved that also structure is safe and reliable more simply more, failure rate is few more.
The utility model provides and a kind ofly be based on separate unit tri-level sync switch equally but circuit topological structure and patent document " based on the Intelligent Reactive Compensation Equipment of separate unit tri-level sync switch " (application number: 201210066279.4) diverse Intelligent Reactive Compensation Equipment.Based on this circuit topological structure, the utility model has further proposed a kind of Intelligent Reactive Compensation Equipment with unbalance protection, and it judges through the three-phase current sum whether balance provides unbalance protection for the capacitor group to electric current by this.This protection strategy is different with dual star topology curtage unbalance protection strategy with the voltage open-delta of the capacitor group routine of Y-connection, is a kind of simple, effectively guard method.
Compare and use many monopolar synchronous switches to come the technical scheme of opening-closing capacitor bank respectively in the prior art; The utility model only needs the synchro switch that one three utmost point is closed simultaneously, open simultaneously; Through using precharge technology and simultaneous techniques, realize reactive power compensation at this tri-level sync switch of phase angle switching of predetermined grid line voltage.Wherein, the tri-level sync switch that is adopted is a large amount of three utmost points while closures of using, the mechanical switch of opening simultaneously on the engineering.
The utility model is realized through following scheme:
In Intelligent Reactive Compensation Equipment based on separate unit tri-level sync switch; The capacitor group is made up of reactor that connects into the delta network form and capacitor; Three main contactss of tri-level sync switch (K1) are installed in the delta network; Be connected in series with the capacitor group; The pre-charge circuit (1) that is being connected in parallel between the input of one of them main contacts and the output, the pre-charge circuit (2) that is being connected in parallel between the input of another main contacts and the output, grid line voltage is given the precharge of said capacitor group through said pre-charge circuit (1) and said pre-charge circuit (2); Phase control device is according to the phase angle of predetermined grid line voltage; Voltage on tri-level sync switch (K1) main contacts equal zero or voltage and voltage change ratio simultaneously near the place at zero point, connection simultaneously, turn-off three main contactss of tri-level sync switch (K1) simultaneously, with opening-closing capacitor bank.
Preferably; Said reactive power compensator also comprises current transformer; Its primary side is connected with said capacitor group; Its secondary side is connected with said phase control device, and this current transformer is used to detect the summation of three-phase current in the said delta network, and said phase control device is that said capacitor group provides unbalance protection according to the summation of this electric current.
Pre-charge circuit (1) is made up of diode that is connected in series (D1) and resistor (R1), and the negative electrode of diode (D1) is connected to the phase in the line voltage, and the anode of diode (D1) is connected to the capacitor group; Said pre-charge circuit (2) is made up of diode that is connected in series (D2) and resistor (R2), and the anode of diode (D2) is connected to another phase of line voltage, and the negative electrode of diode (D2) is connected to the capacitor group.
The phase angle of said predetermined grid voltage is chosen as: voltage on the main contacts of said pre-charge circuit (1) and pre-charge circuit (2) that is being connected in parallel and voltage change ratio are simultaneously near locating zero point; When another does not have magnitude of voltage zero crossing and the magnitude of voltage on this main contacts of the pairing grid line voltage of main contacts of parallelly connected pre-charge circuit to equal zero, connect, turn-off simultaneously three main contactss of tri-level sync switch (K1) simultaneously.After 1 to 6 second, when receiving switching order S1 close command once more, according to the phase angle of above-mentioned predetermined grid voltage, tri-level sync K switch 1 closure, the capacitor group reruns work.
Tri-level sync K switch 1 is a kind of in permanent magnet contactor, permanent-magnet breaker, electromagnetic treadle and the electromagnetic breaker.
The useful technique effect of the utility model:
Through experiment, the device of the utility model when opening-closing capacitor bank, switch by closed, to be opened to closed once more operate time be 1～6 second, compares the switching time of minute level of the synchro switch of mentioning in the background technology, reduce greatly.And, can be fast, the no-flashy-flow opening-closing capacitor bank, seldom occur or the phenomenon of restriking can not occur basically, can obtain excellent electric switching effect, have splendid electric property.The compensation arrangement of the utility model adopts synchro switch, and switch closure does not have energy consumption, discharge coil or discharge resistance need be set in the device, is green energy conservation.Three utmost point mechanical switchs are widely used in low pressure (below the 1KV); The middle pressure (1KV～35KV); High pressure (＞35KV) each current class of occasion, therefore, but the Intelligent Reactive Compensation Equipment of the utility model is owing to use three utmost point mechanical switchs of this type of Synchronization Control; Also can be suitable for various electric pressures and use, but the device of the utility model especially is fit to the low pressure applications with each current class.In addition, compare with the other technologies scheme of opening-closing capacitor bank such as available technology adopting synchro switch, combination switch, thyristor switch, the component number that the scheme of the utility model adopts obviously reduces; Therefore simplify circuit structure, saved installing space, economic and practical; User easier is accepted; Be convenient to engineering and widely apply, engineering practice has proved that also structure is safe and reliable more simply more, and failure rate is few more.
In the utility model; Every phase capacitor is by fixing line power voltage supply in the capacitor group, and three main contactss of tri-level sync switch are operated in respectively in the single phase circuit of grid line voltage U V, VW, WU, and the single phase circuit operating state is simpler than three-phase circuit; Stable, reliable.Because the tri-level sync switch of the utility model is arranged in the triangle; Compare the outer scheme of triangle that is arranged on; Reduced
outside the current ratio angle in the angle doubly; Therefore operating cost is lower, more economical in low-voltage circuit, is particularly useful for low pressure applications.And; Three main contactss of the synchro switch of the utility model operate in the single phase circuit of line voltage of UV, VW, WU; When non-equilibrium state appears in the capacitor group; The electric current summation of three main contactss of synchro switch occurs uneven, therefore is very easy to observe the uneven damaged condition of capacitor group, and this protection for compensation arrangement is very useful, effective; Simultaneously be again the protection of voltage open-delta and dual star topology voltage or the current imbalance protection that is different from conventional capacitor group, a kind of simple and effective imbalance protecting method of can yet be regarded as.
Description of drawings
Fig. 1: according to the circuit diagram based on the exemplary embodiment of the Intelligent Reactive Compensation Equipment of separate unit tri-level sync switch of the utility model;
Fig. 2: the voltage and current working waveform figure of capacitor C1 shown in Figure 1;
Fig. 3: the voltage and current working waveform figure of capacitor C2 shown in Figure 1;
Fig. 4: the voltage and current working waveform figure of capacitor C3 shown in Figure 1;
Among the figure: 1, pre-charge circuit 2, pre-charge circuit 3, line voltage synchronizing indicator 4, phase controller 5, K1 coil actuator 6, unbalance protection device.
Embodiment
Fig. 1 has described the embodiment based on the Intelligent Reactive Compensation Equipment of separate unit tri-level sync switch according to the utility model, and wherein, the capacitor group of being made up of reactor L1, L2, L3 and capacitor C1, C2, C3 connects into the delta network form.The input X1 of three main contacts K1A of tri-level sync K switch 1, K1B, K1C, X3, X5 are connected with three phase network voltage U, V, W respectively; The output X2 of three main contacts K1A of tri-level sync K switch 1, K1B, K1C, X4, X6 are connected in series with the capacitor group respectively; Three main contacts K1A, K1B, K1C of tri-level sync K switch 1 are installed in the capacitor group circuit; Pre-charge circuit 1 wherein is being connected in parallel between the input X1 of main contacts K1A and the output X2; The pre-charge circuit 2 that is being connected in parallel between the input X3 of main contacts K1B and the output X4, grid line voltage through pre-charge circuit 1 and pre-charge circuit 2 to the precharge of capacitor group.
Pre-charge circuit 1 is made up of diode D1 that is connected in series and resistor R 1, and the negative electrode of diode D1 is connected to the U phase of line voltage, and the anode of diode D1 is connected on the reactor L1 of capacitor group through resistor R 1.Pre-charge circuit 2 is made up of diode D2 that is connected in series and resistor R 2, and the anode of diode D2 is connected to the V phase of line voltage, and the negative electrode of diode D2 is connected to through resistor R 2 on the reactor L2 of capacitor group, the grid line voltage U
UVThrough 1 couple of capacitor C1 of pre-charge circuit precharge, grid line voltage U
VWThrough 2 couples of capacitor C2 of pre-charge circuit precharge.
Phase control device is made up of line voltage synchronizing indicator 3, phase controller 4, K1 coil actuator 5 and unbalance protection device 6.The circuit of each part of phase control device is similar with the control circuit of the conventional synchro switch that use in the present technique field, understands for those skilled in the art, repeats no more at this.Phase control device is according to the phase angle of predetermined grid line voltage, the line voltage U on the main contacts K1C of tri-level sync K switch 1
WUEqual zero and main contacts K1A, main contacts K1B on voltage and voltage change ratio simultaneously near the place at zero point, connect simultaneously, turn-off three main contactss of tri-level sync K switch 1 simultaneously, come opening-closing capacitor bank.Particularly, when receiving switching order S1 close command, line voltage synchronizing indicator 3, phase controller 4 and 5 work of K1 coil actuator drive the K1 coil, in the grid line voltage U
WUZero crossing, closed tri-level sync K switch 1 realizes that capacitor group no current impacts to devote oneself to work; When receiving switching order S1 halt instruction, line voltage synchronizing indicator 3, phase controller 4 and 5 work of K1 coil actuator drive the K1 coil, in the grid line voltage U
WUZero crossing, open tri-level sync K switch 1.After 1～6 second, when receiving switching order S1 close command once more, line voltage synchronizing indicator 3, phase controller 4 and 5 work of K1 coil actuator; Drive the K1 coil; According to the phase angle of above-mentioned predetermined grid voltage, closed tri-level sync K switch 1, the capacitor group puts into operation again.
As shown in Figure 1, the Intelligent Reactive Compensation Equipment of the utility model also can comprise current transformer CT, is used for detecting the summation of three-phase current in the delta network, for the capacitor group provides the unsymmetrical current protection.Wherein, the primary current of current transformer CT is for flow to or flow out the electric current of the capacitor group of triangle connection simultaneously, and its secondary side is connected to phase control device, specifically is connected to unbalance protection device 6.When capacitor group operate as normal, the secondary current of current transformer CT is zero; When the capacitor group breaks down; The secondary current of current transformer CT is the non-zero current corresponding with the extent of damage, and this electric current gets into unbalance protection device 6, and unbalance protection device 6 can monitor the damage of capacitor group; And then open tri-level sync K switch 1, assurance device safe operation.The adding of current transformer CT may further be device unbalance protection is provided.
Current Transformer CT detects the summation of three-phase current in the triangle, and the Current Transformer Secondary side current value when meter is calculated the capacitor decay is as shown in the table:
During the decay of table 1 capacitor, the current value of Current Transformer Secondary side
Can find out that from last table adopting said method is very accurate, simple, sensitive.
Should note; Although what show among Fig. 1 is the main contacts K1A two ends that pre-charge circuit 1 is connected in tri-level sync K switch 1 in parallel; Pre-charge circuit 2 is connected in the two ends of the main contacts K1B of tri-level sync K switch 1 in parallel, but pre-charge circuit 1 and pre-charge circuit 2 can be connected in any two main contacts two ends in three main contactss of tri-level sync K switch 1 in parallel, as long as synchronous voltage signal is done corresponding adjustment; Control program is constant, and the switching effect can not be affected yet.
Fig. 2～Fig. 4 shows the working waveform figure with the voltage and current of capacitor C1 shown in Figure 1, capacitor C2 and the capacitor C3 of oscilloscope measurement respectively.Can find out that from Fig. 2, Fig. 3, Fig. 4 when every phase capacitor of three-phase condenser bank dropped into, switch work was shoved not quite, during excision, the voltage on the capacitor can not exceed the peak value of grid line voltage, and voltage value is little.The electric property that this shows the utility model device is good, and the capacitor group voltage current waveform of measurement satisfies commercial Application.At mains frequency is 50Hz, when promptly a cycle is 20ms, the switch that the oscillogram of measuring from Fig. 2, Fig. 3, Fig. 4 it can also be seen that opening-closing capacitor bank by closed, be opened to closed once more operate time less than 1 second, satisfy the requirement of quick switching action.
The selection of the main element that the utility model reactive power compensator adopted is described below for example.When the reactive power compensator of the utility model was applied to the 1KV line voltage, the compensation arrangement capacity was 1500kvar, and every phase capacitor can adopt 5 100kvar parallel connections; In the triangle during electric current 352A; Tri-level sync K switch 1 adopts common three utmost point permanent magnet contactors, and model is CKJ5-400-1140/DY (three utmost points) for example, and diode D1, D2 can select the high voltage silicon stack diode; Diode D1, D2 voltage are 6KV; Electric current 1A, the current-limiting resistor R1 that connects with diode D1, D2, R2 are 1000 ohm, the resistance of 1W.Current transformer is BH-1-120I I, and 1KV 100/5.Certainly, can select each device parameters as required.
Tri-level sync K switch 1 can be in permanent magnet contactor, permanent-magnet breaker, electromagnetic treadle and the electromagnetic breaker a kind of.Three utmost points of the main contacts of tri-level sync K switch 1 are that closure is opened simultaneously simultaneously, do not control closure respectively and open.As long as satisfying synchronous control accuracy requires just passable.
The specific embodiment of the utility model has been made detailed explanation to the content of the utility model, and those skilled in the art can do various modifications, be equal to replacement or improvement under the application's spirit and principle inspiration.But these modification or modification are all in the protection range that application is awaited the reply.
Claims (5)
1. Intelligent Reactive Compensation Equipment based on separate unit tri-level sync switch; It is characterized in that: the capacitor group is made up of reactor that connects into the delta network form and capacitor; Three main contactss of tri-level sync switch (K1) are installed in the said delta network; Be connected in series with the capacitor group; The pre-charge circuit (1) that is being connected in parallel between the input of one of them main contacts and the output, the pre-charge circuit (2) that is being connected in parallel between the input of another main contacts and the output, grid line voltage is given the precharge of said capacitor group through said pre-charge circuit (1) and said pre-charge circuit (2); Phase control device is according to the phase angle of predetermined grid line voltage; Voltage on tri-level sync switch (K1) main contacts equal zero or voltage and voltage change ratio simultaneously near the place at zero point, connection simultaneously, turn-off three main contactss of tri-level sync switch (K1) simultaneously, with opening-closing capacitor bank.
2. Intelligent Reactive Compensation Equipment according to claim 1; It is characterized in that: also comprise current transformer; Its primary side is connected with said capacitor group, and its secondary side is connected with said phase control device, and this current transformer is used to detect the summation of three-phase current in the said delta network; Said phase control device is according to the summation of this electric current, for said capacitor group provides unbalance protection.
3. according to claim 1 or the described Intelligent Reactive Compensation Equipment of claim 2; It is characterized in that: said pre-charge circuit (1) is made up of diode that is connected in series (D1) and resistor (R1); The negative electrode of diode (D1) is connected to the phase in the line voltage, and the anode of diode (D1) is connected to the capacitor group; Said pre-charge circuit (2) is made up of diode that is connected in series (D2) and resistor (R2), and the anode of diode (D2) is connected to another phase of line voltage, and the negative electrode of diode (D2) is connected to the capacitor group.
4. according to claim 1 or the described Intelligent Reactive Compensation Equipment of claim 2; It is characterized in that: the phase angle of said predetermined grid voltage is chosen as: voltage on two main contactss of said pre-charge circuit (1) and pre-charge circuit (2) that are being connected in parallel and voltage change ratio are simultaneously near locating zero point; When another does not have magnitude of voltage zero crossing and the magnitude of voltage on this main contacts of the pairing grid line voltage of main contacts of parallelly connected pre-charge circuit to equal zero, connect, turn-off simultaneously three main contactss of tri-level sync switch (K1) simultaneously.
5. according to claim 1 or the described Intelligent Reactive Compensation Equipment of claim 2, it is characterized in that: a kind of in permanent magnet contactor, permanent-magnet breaker, electromagnetic treadle and the electromagnetic breaker of said tri-level sync switch (K1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220143207 CN202495773U (en) | 2012-04-05 | 2012-04-05 | Intelligent reactive power compensation device based on single tripolar synchronous switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220143207 CN202495773U (en) | 2012-04-05 | 2012-04-05 | Intelligent reactive power compensation device based on single tripolar synchronous switch |
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| CN202495773U true CN202495773U (en) | 2012-10-17 |
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| CN 201220143207 Withdrawn - After Issue CN202495773U (en) | 2012-04-05 | 2012-04-05 | Intelligent reactive power compensation device based on single tripolar synchronous switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611123A (en) * | 2012-04-05 | 2012-07-25 | 北京馨容纵横科技发展有限公司 | Intelligent reactive compensation device based on single three-pole synchronous switch |
| CN104143828A (en) * | 2014-08-07 | 2014-11-12 | 安徽富煌电控设备有限公司 | Intelligent reactive compensation control device of synchronous switch cabinet |
-
2012
- 2012-04-05 CN CN 201220143207 patent/CN202495773U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611123A (en) * | 2012-04-05 | 2012-07-25 | 北京馨容纵横科技发展有限公司 | Intelligent reactive compensation device based on single three-pole synchronous switch |
| CN102611123B (en) * | 2012-04-05 | 2015-07-15 | 北京馨容纵横科技发展有限公司 | Intelligent reactive compensation device based on single three-pole synchronous switch |
| CN104143828A (en) * | 2014-08-07 | 2014-11-12 | 安徽富煌电控设备有限公司 | Intelligent reactive compensation control device of synchronous switch cabinet |
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