CN2631094Y - Special inputting device for compensating capacitor - Google Patents
Special inputting device for compensating capacitor Download PDFInfo
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- CN2631094Y CN2631094Y CN 03205229 CN03205229U CN2631094Y CN 2631094 Y CN2631094 Y CN 2631094Y CN 03205229 CN03205229 CN 03205229 CN 03205229 U CN03205229 U CN 03205229U CN 2631094 Y CN2631094 Y CN 2631094Y
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- circuit
- capacitor
- power supply
- connects
- diode
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Abstract
The utility model discloses a special thrown-in device for a compensating capacitor, which is formed by that a synchronizing signal circuit, a pre-charged circuit, a control circuit and a trigger system power supply are respectively connected with a power supply, wherein the control circuit is connected with the synchronizing signal circuit; the output ends of the synchronizing signal circuit and the pre-charged circuit are thrown in the capacitor. The synchronizing signal circuit is connected with a starting-isolating circuit through a shaping circuit, a negater circuit, a separated positive impulse circuit and a starting-triggering circuit. The utility model can restrict the inrush current in switching-on to zero, so that the capacitor directly goes into the operating current state so as to reduce attack to equipment and supply lines, decrease the public hazard for electric networks, prolong the service life of electric networks, and raise the current supply quality. With a reliable design, the compensating capacitor can ensure the on-time throw-in during equalization of electric voltage. The larger the throw-in capacitance of the capacitor is, the more the capacity for inrush current restricting of this device is embodied. After the voltage level of controllable silicon is raised, the utility model can still adapt the throw-in work of the high-voltage capacitor, just under the condition that the simultaneous triggering circuit is properly adjusted.
Description
Technical field the utility model relates to a kind of power distribution equipment, is the special-purpose feeding device of a kind of compensation condenser specifically.
It is that inductance limits inrush phenomenon that background technology capacitor input in the past only adopts crosstalk resistance or reactor, and its effect can only limit and can not eliminate and shove, and making shoves has adverse effect to electrical network, also influential to life of capacitors simultaneously.
The summary of the invention the purpose of this utility model is to provide a kind of compensation condenser special-purpose feeding device, it can be restricted to zero to inrush phenomenon, makes capacitor directly enter the operating current state, reduces to equipment, to supply line and impacts, prolong its useful life, improve power supply quality.
The technical solution of the utility model is as follows:
This device is that power supply connects synchronous signal circuit, pre-charge circuit, control circuit, triggering system power supply respectively, and above-mentioned control circuit connects synchronous signal circuit, and the output of synchronous signal circuit and pre-charge circuit connects capacitor; Said synchronous signal circuit is to get synchronous signal circuit even to start buffer circuit through shaping circuit, phase inverter, separation positive pulse circuit, start triggering circuit.
Above-mentioned pre-charge circuit is that three phase mains meets bidirectional triode thyristor VS through air switch QF, fuse FU
1-3An end, above-mentioned controllable silicon meets capacitor C through thermal relay FR, at the A of power supply mutually or B phase the silicon controlled two ends parallel connection one rectifier diode VD and the relay tip J that are connected
2-1And current-limiting resistance R and relay tip J
2-2, air switch QF closes, and power supply is given capacitor C charging through diode VD.
Above-mentioned control circuit is power supply C phase u
CContact FR, stop button SB through fuse FU, thermal relay
1, start button SB
2, relay J
1, fuse FU meets the other end N of power supply; Start button SB
2A self-locking contact J in parallel
1-1
Above-mentioned synchronous signal circuit is that power supply C is through synchrotrans T, rectifier VD
1-4The diode VD of output, access shaping circuit
5, this diode is through resistance R
1, voltage stabilizing didoe VZ
1, the A point connects the resistance R of phase inverter
2, R
2Meet triode VT
1Base stage, its collector electrode meets the triode VT that separates the positive pulse circuit
2Base stage, the emitter of this triode connects capacitor C
2And diode VD
7, this diode connects the control utmost point of the controllable silicon VSC of circuits for triggering, and this silicon controlled negative electrode connects triode VT
3Collector electrode, above-mentioned silicon controlled anode connects signal lamp EL, this lamp relay J in parallel
2Diode VD
6, voltage stabilizing didoe VZ
2, the two ends of this parallel circuits connect photoelectronic coupler N1, N2, N3 and the bidirectional triode thyristor control utmost point G of buffer circuit
1-6
Advantage of the present utility model is: 1, it can be restricted to zero to inrush phenomenon, makes capacitor directly enter the operating current state, reduces to equipment, to supply line and impacts, and subduction electrical network public hazards prolong its useful life, improve power supply quality.2, this Design of device is reliable, can guarantee to drop on time when voltage equates.3, this big more this device that just can embody more of capacity that installs input electric capacity limits the ability of shoving, and after the silicon controlled rectifier voltage grade is raise, adapts to the input operation of high-voltage capacitor equally, only suitably adjusts a synchronous trigger circuit and gets final product.
Description of drawings Fig. 1 is the utility model block diagram;
Fig. 2 is the circuit theory diagrams of the utility model pre-charge circuit;
Fig. 3 is the circuit theory diagrams of the utility model control circuit;
Fig. 4 is the circuit theory diagrams of the utility model synchronous signal circuit;
Fig. 5 is i after the utility model precharge finishes
AB, u
AB, C
ABOscillogram;
Fig. 6 is the utility model supply voltage vectogram;
Fig. 7 is a three-phase voltage oscillogram after the utility model precharge;
Fig. 8 is A among Fig. 4, B, 3 pulse signals of C and power supply C phase voltage waveform corresponding diagram.
The utility model is described in further detail below in conjunction with accompanying drawing for embodiment.
Can be seen that by Fig. 1 this device is that power supply connects synchronous signal circuit, pre-charge circuit, control circuit, triggering system power supply respectively, above-mentioned control circuit connects synchronous signal circuit, and the output of synchronous signal circuit and pre-charge circuit drops into capacitor; Said synchronous signal circuit is to get synchronous signal circuit even to start buffer circuit through shaping circuit, phase inverter, separation positive pulse circuit, start triggering circuit.
By Fig. 2, can see that above-mentioned pre-charge circuit is that three phase mains meets bidirectional triode thyristor VS through air switch QF, fuse FU
1-3An end, this controllable silicon meets capacitor C through thermal relay FR, at the A of power supply mutually or B phase the silicon controlled two ends parallel connection one rectifier diode VD and the relay tip J that are connected
2-1And current-limiting resistance R and relay tip J
2-2
Can see that by Fig. 5 after precharge finished, the A of capacitor C, B voltage between phases were u
AB, the maximum of line voltage is worked as u
ABDuring for positive half cycle maximum, equate that with capacitor A, B two alternate voltages direction is opposite, promptly voltage difference is zero, and it is zero dropping into inrush phenomenon this moment, directly by power supply capacitor C is pulled into operation.U among Fig. 7 in like manner simultaneously
BC, u
CAAlso equate that with C, A phase voltage direction is opposite mutually with capacitor B, C, also no-flashy-flow occurs.
Positive Zhou Shangshu voltage difference is a zero crossing constantly the time among Fig. 6, Fig. 7, and the C phase voltage is zero, so employing is a benchmark with C phase phase voltage, capacitor is dropped into power supply synchronously, operates stably, and this phenomenon can be seen in the three-phase oscillogram equally.
QF closes with air switch, power supply A, B charges to capacitor C through rectifier diode VD and current-limiting resistance R, the positive B of A is negative during charging, detect synchronizing signal when the C phase zero passage by synchronous circuit during input, when equating, drops on time the mutual voltage of power supply three-phase voltage and electric capacity, this moment, voltage difference was zero, promptly close a floodgate with no-voltage, with the direct normal operation input of capacitor, for guaranteeing synchronous accuracy, adopt two-phase controllable silicon or single-phase silicon-controlled reverse parallel connection as the main operation switch, when dropping into to withdrawing from, only need triggering signal is stopped, entire circuit can be out of service when current zero-crossing point.
Can see that by Fig. 3 above-mentioned control circuit is power supply C phase u
CContact FR, stop button SB through fuse FU, relay
1, start button SB
2, relay J
1, fuse FU meets the other end N of power supply; Start-up control button SB
2A self-locking contact K1 in parallel.Control drops into can adopt manual control start button SB
2, pass through relay J
1Carry out, or pass through relay J by automatic controller ZKJ low capacity contact
1Carry out, can also be with relay J
1Cancellation is directly passed through resistance R among Fig. 4 by external control circuit output logic level signal
10, control triode VT
3Carry out.
Can see that by Fig. 4 above-mentioned synchronous signal circuit is that power supply C is through synchrotrans T, rectifier VD
1-4The diode VD of output, access shaping circuit
5, this diode is through resistance R 1, voltage stabilizing didoe VZ
1, the A point connects the resistance R of phase inverter
2, R
2Meet triode VT
1Base stage, its collector electrode meets the triode VT that separates the positive pulse circuit
2Base stage, the emitter of this triode connects capacitor C
2And diode VD
7, this diode connects the controllable silicon VSC of circuits for triggering, and this silicon controlled negative electrode connects triode VT
3Collector electrode, above-mentioned silicon controlled anode connects indicator light EL, this lamp relay J in parallel
2Fly-wheel diode VD
6, voltage stabilizing didoe VZ
2, the two ends of this parallel circuits connect the photoelectronic coupler N of buffer circuit
1-3And the control utmost point G of bidirectional triode thyristor
1-6Can see that by Fig. 4, Fig. 8 obtain synchronizing signal and triggering system power supply by C through synchrotrans T before the operation, synchronizing signal is directly taken from the corresponding end of the same name of secondary C of transformer T, through the diode VD of shaping circuit
5After detecting positive half cycle waveform, again through resistance R
1With voltage stabilizing didoe VZ
1Wave absorption is just obtained the corresponding just trapezoidal wave of half cycle at the A point, further through switching tube VT
1After the shaping paraphase output, the B point can get corresponding negative half period and the neat zero crossing of aiming at gets square-wave signal, controls emitter follower triode VT subsequently
2Supply voltage is delivered to C
2, R
7In the differential circuit of forming, isolate positive and negative pulse signal, after diode VD
7Every falling, the C point triggers controllable silicon VSC with positive pulse C with negative pulse, before this, and earlier triode VT
3Open-minded, hand push button SB
2, make relay J 1 adhesive among Fig. 2, its contact J
1-2Closure, triode VT
3Conducting, controlled
Signal lamp EL is lighted in silicon VSC conducting thereupon, and through R8, VZ
2Further conducting photoelectronic coupler N1, N2, N3 after the voltage stabilizing start controllable silicon VS
1-3Drop into capacitor C.
Whole device is the air switch QF in the cardon 2 on the offensive, precharge, and hand push button SB2 makes triode VT again
3Conducting is opened controllable silicon VS with synchronizing signal
1-3Incorporate capacitor C into.
The main function of signal lamp EL is to provide initial conducting electric current, relay J when EL lights for controllable silicon VSC
2Adhesive, Fig. 2 repeat circuit contact J
2-2Disconnect, out of service VD, R.
Out of service need are triode VT
3Close, photoelectronic coupler is closed thereupon, controllable silicon VS
1-3Close, capacitor is out of service.
The parameter of resistance and electric capacity meets (R6+R7) * C2＜0.005S among Fig. 4, otherwise can influence diode VD
7Spike output.
Claims (4)
1, the special-purpose feeding device of a kind of compensation condenser, it is characterized in that: it is that power supply connects synchronous signal circuit, pre-charge circuit, control circuit, triggering system power supply respectively, above-mentioned control circuit connects synchronous signal circuit, and the output of synchronous signal circuit and pre-charge circuit drops into capacitor; Said synchronous signal circuit is to get synchronous signal circuit even to start buffer circuit through shaping circuit, phase inverter, separation positive pulse circuit, start triggering circuit.
2, the special-purpose feeding device of compensation condenser according to claim 1, it is characterized in that: its pre-charge circuit is that three phase mains meets bidirectional triode thyristor VS through air switch QF, fuse FU
1-3An end, above-mentioned controllable silicon meets capacitor C through thermal relay FR, at the A of power supply mutually or B phase the silicon controlled two ends parallel connection one rectifier diode VD and the relay tip J that are connected
2-1And current-limiting resistance R and relay tip J
2-2
3, the special-purpose feeding device of compensation condenser according to claim 1, it is characterized in that: its control circuit is power supply C phase u
CContact FR, stop button SB through fuse FU, thermal relay
1, start button SB
2, relay J
1, fuse FU meets the other end N of power supply; Start button SB
2A self-locking contact J in parallel
1-1
4, the special-purpose feeding device of compensation condenser according to claim 1, it is characterized in that: its synchronous signal circuit is that power supply C is through synchrotrans T, rectifier VD
1-4The diode VD of output, access shaping circuit
5, this diode is through resistance R
1, voltage stabilizing didoe VZ
1, the A point connects the resistance R of phase inverter
2, R
2Meet triode VT
1Base stage, its collector electrode meets the triode VT that separates the positive pulse circuit
2Base stage, the emitter of this triode connects capacitor C
2And diode VD
7, this diode connects the control utmost point of the controllable silicon VSC of circuits for triggering, and this silicon controlled negative electrode connects triode VT
3Collector electrode, above-mentioned silicon controlled anode connects signal lamp EL, this lamp relay J in parallel
2Diode VD
6, voltage stabilizing didoe VZ
2, the two ends of this parallel circuits connect photoelectronic coupler N1, N2, N3 and the bidirectional triode thyristor control utmost point G of buffer circuit
1-6
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03205229 CN2631094Y (en) | 2003-07-25 | 2003-07-25 | Special inputting device for compensating capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03205229 CN2631094Y (en) | 2003-07-25 | 2003-07-25 | Special inputting device for compensating capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2631094Y true CN2631094Y (en) | 2004-08-04 |
Family
ID=34287657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03205229 Expired - Fee Related CN2631094Y (en) | 2003-07-25 | 2003-07-25 | Special inputting device for compensating capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2631094Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593847A (en) * | 2012-03-14 | 2012-07-18 | 北京馨容纵横科技发展有限公司 | Single tripolar synchronous switch-based intelligent reactive power compensation device |
| CN103311938A (en) * | 2013-06-25 | 2013-09-18 | 浙江清电科技有限公司 | Control method for synchronous casting and cutting of three-phase capacitive load in three-phase circuit |
-
2003
- 2003-07-25 CN CN 03205229 patent/CN2631094Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593847A (en) * | 2012-03-14 | 2012-07-18 | 北京馨容纵横科技发展有限公司 | Single tripolar synchronous switch-based intelligent reactive power compensation device |
| CN102593847B (en) * | 2012-03-14 | 2015-06-24 | 北京馨容纵横科技发展有限公司 | Single tripolar synchronous switch-based intelligent reactive power compensation device |
| CN103311938A (en) * | 2013-06-25 | 2013-09-18 | 浙江清电科技有限公司 | Control method for synchronous casting and cutting of three-phase capacitive load in three-phase circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |