CN2271775Y

CN2271775Y - Thyratron transistor electric controller

Info

Publication number: CN2271775Y
Application number: CN 96205264
Authority: CN
Inventors: 李德
Original assignee: Institute of High Energy Physics of CAS
Current assignee: Institute of High Energy Physics of CAS
Priority date: 1996-03-08
Filing date: 1996-03-08
Publication date: 1997-12-31
Anticipated expiration: 2006-03-08

Abstract

The utility model belongs to an input and output power controller of power generation and power distribution, which mainly comprises a thyristor AC voltage regulating circuit with a full wave, a voltage stabilizing power supply, a synchronous signal generator, a trigger pulse formation and output circuit, a protection circuit, a control interface, an external control device and a local control board, wherein, the trigger pulse formation and output circuit is provided with programmable logic devices and has the function of three-stage amplification, the protection circuit has soft start stepped voltage reducing and reset circuit and two groups of voltage stabilizing power supplies. The utility model has the advantages of stable operation, safety and automatic reset.

Description

The thyristor electric power controller

The utility model belongs to power generation or distribution field, is about the thyristor electric power controller, is meant especially a kind ofly can improve operation stability, has controlled function flexibly, is applicable to the thyristor electric power controller of high-power high voltage power devices.

The thyristor electric power controller is easy to realize the automatic control to equipment because its volume is little, in light weight, uses more and more widely.

But existing thyristor electric power controller has multiple shortcoming; for example special chip or chip microprocessor are used in the generation of phase shift trigger impulse; this mode is because complex structure; operation stability is relatively poor, for another example, and after the protective circuit action; the master relay action; do not have charged reset function, master control relay road frequent movement will reduce relay useful life like this.

The purpose of this utility model is to overcome above-mentioned shortcoming, a kind of improved thyristor electric power controller is provided, produces trigger impulse, simplify trigger impulse and form circuit with general comparator and general programmable logic device, improve operation stability, reduce manufacturing expense.

Another purpose of the present utility model is, a kind of improved thyristor electric power controller is provided, have soft start and classification buck functionality, after powering up for the first time or reset signal arranged, load voltage can be raised to the magnitude of voltage of setting lentamente, is in operation simultaneously and can accomplishes the classification step-down, slowly resets, to be fit to powerful device, the particularly operation of high-power high voltage equipment.

Another purpose of the present utility model is, a kind of improved thyristor electric power controller is provided, and after the master relay that breaks down disconnected, fault-signal still remained on local control board and shows, continue to give external control devices simultaneously, be beneficial to the inspection of fault.

The utility model also has a purpose to be; a kind of improved thyristor electric power controller is provided; under the control of local control board or external control devices; can realize charged resetting; when protective circuit is moved; can not disconnect master relay, avoid the frequent movement of master relay, prolong its useful life.

A kind of thyristor electric power controller; it comprises a three-phase thyristor all-wave regulating circuit of being made up of six thyristors; two stabilized voltage power supplys; a circuit for generating synchronous signals; a trigger impulse output circuit; a protective circuit; a control interface; a local control board and the thyristor electric power controller that external control devices is formed; it is characterized in that; its trigger impulse forms circuit and is made up of programmable logic device; be connected with three groups of voltage comparators before programmable logic device, the trigger impulse of programmable logic device output is linked into the thyristor voltage regulation circuit after the trigger impulse output circuit amplifies; said protective circuit also is connected to soft start and classification reduction voltage circuit; reset circuit, the stabilized voltage power supply that inserts protective circuit is the stabilized voltage power supply of separating with other circuit.Described soft start and classification reduction voltage circuit are made of one three end adjustable voltage module, insert a group transistor in its adjustable side.Two stabilized voltage power supply power supplies of described usefulness, wherein protective circuit is used a stabilized voltage power supply separately, and the input of this stabilized voltage power supply is received before the master relay of described three-phase full-wave regulating circuit.Protective circuit is connected to charged reset circuit, is connected to seven diodes of five triggers of control after local control board or external control devices.Trigger impulse wherein forms circuit and is made up of three groups of comparators and a general programmable logic device, the synchronizing signal that circuit for generating synchronous signals produces is sent into three groups of comparators with the control signal that phase-control circuit produces respectively through different combinations, programmable logic device is sent in the output of comparator, six six road trigger impulses that thyristor is required of programmable logic device output; Soft start wherein and classification reduction voltage circuit mainly are made up of three end regulated power supply modules, it imports termination power, its output is as the input voltage reference signal of phase-control circuit, its adjustable side is connected to the output of one group of triode, change adjustable side voltage by triode, thereby realize soft start and classification step-down; Protective circuit is separated single with a stabilized voltage power supply with remaining circuit, input to the stabilized voltage power supply of protective circuit power supply, be connected to before the master relay, after the stabilized voltage power supply of remainder power supply is connected to protective circuit, after the master relay that breaks down disconnects, the fault number of selling still is kept on the local control board by trigger and shows, also continues simultaneously to give external control devices with this signal; Be provided with charged reset circuit; when overcurrent, overvoltage fault occurring; under the protective circuit effect, disconnect the trigger impulse of thyristor; do not disconnect master relay; equipment to be controlled is judged in the time of can resetting; to crossing reset signal, each trigger and the soft starting circuit of protective circuit are resetted by control appliance, output voltage slowly is raised to former working value.

Fig. 1 is a logic diagram of the present utility model

Fig. 2 forms circuit theory diagrams for trigger impulse

Fig. 3 is a trigger impulse output circuit schematic diagram

Fig. 4 is a thyristor electric power controller main circuit

Fig. 5 is soft start and classification reduction voltage circuit schematic diagram

Fig. 6 a-6b is stabilized voltage power supply A, B circuit theory diagrams

Fig. 7 is the circuit for generating synchronous signals schematic diagram

Fig. 8 is the phase-control circuit schematic diagram

Fig. 9 a-9c is the protective circuit schematic diagram

Figure 10 is the reset circuit schematic diagram

Figure 11 a-11b is the control interface circuit schematic diagram

Figure 12 is local control board schematic diagram

(1) main control part (Fig. 4), wherein master relay is controlled by external control devices, becomes AC voltage adjusting circuit by six thyristor groups.The angle of flow of thyristor is by the trigger impulse control of trigger impulse output circuit output, thus the operating voltage of control load.

(2) power unit (Fig. 6 a-6b) is provided with two stabilized voltage power supplys, and the input of stabilized voltage power supply A is connected on after the master relay, master relay is connected, stabilized voltage power supply A power supply, and the input of stabilized voltage power supply B is connected to before the master relay, master control relay road disconnects, and stabilized voltage power supply B still can power.When breaking down the disconnection master relay, protective circuit still can keep the state of fault, is beneficial to the inspection (referring to the protective circuit part) of fault like this.

(3) synchronizing signal produces part (Fig. 7), and the low pass filter that this part is made up of linear amplification assembly IC501 (as LF444) is to the stabilized voltage power supply A (V that Fig. 6 a) exports _AB, V _BC, V _CACarry out filtering, produce synchronizing signal, these synchronizing signals are output to trigger impulse and form circuit (Fig. 2).

(4) phase control part (Fig. 8), this part by two linear operation assembly IC301, IC302 forms or (as LM324), this part is by the reference voltage V of interface circuit input _REF(Figure 12) and feedback voltage V _FControl, the control voltage+V of generation trigger impulse _CTRLWith-V _CTRL, its detailed process is: the input reference voltage V of interface circuit input _RThe time, the set-point filter circuit of forming through 12,13,14 pin of IC301 and 10,9, the voltage follower that 8 pin are formed produce an internal reference voltage, this internal reference voltage and feedback voltage V _FThrough the ratio that 5,6,7 pin of IC301 are formed long-pending with link in relatively and to error signal carry out ratio long-pending with amplify, the low pass filter that the signal after the amplification forms for 3,2,1 pin of IC301 again carries out active power filtering generation+V _CTRLInverter generation-the V that forms through IC302 again _CTRL

(5) trigger impulse forms part (Fig. 2), and this part at first produces synchronizing signal VAB ', VBC ', VCA ', the VBC that part produces with synchronizing signal " (Fig. 7) and control signal+V _CTRL-V _CTRLAt IC502, IC503, three groups of voltage comparators of IC504 carry out the comparison of various combination, its output signal is sent into programmable logic array, according to required logical relation between this logic array input signal and output signal,, form the six road trigger impulses synchronous of 30 ° of phase differences at output with power supply to this logic array programming.This six road trigger impulse is admitted to the trigger impulse output circuit and amplifies output.

(6) trigger impulse output (Fig. 3), trigger impulse forms the trigger impulse that part produces, and after three grades of amplifications, exports through the pulse transformer again.

(7) protective circuit part (Fig. 9 a-Fig. 9 c) 10, the protective circuit here partly comprises overcurrent protection, obtains current signal by current transformer I-T1, I-T2, I-T3 among Fig. 4; Overvoltage protection is obtained the overvoltage signal by the voltage divider that is contained in the load; Overtemperature protection obtains temperature signal by the temperature switch T among Fig. 4; The fast acting fuse fuse protection is by sensitive switch F-S1, F-S2, F-S3 picked up signal.These guard signals are distributed into the relevant position of Fig. 9 a and Fig. 9 c, and the reference level that over-current signal and overvoltage signal produce with P401 and P402 respectively in the comparator of being made up of IC401 relatively when surpassing reference level, produces fault-signal.When overheated or fuse melting occurring, temperature switch T or sensitive switch FS UNICOM then will export corresponding fault-signal OVERT or FUSE.The flip and flop generator and the control interface part (Figure 11) of 12,13, the 14 pin composition of assembly IC401 sent in the output of all fault-signals by the STOP line; the fault-signal of sending into above-mentioned flip and flop generator makes that its output V1 is that (Fig. 9 a) for high level; make T401, T402 saturation conduction; the output of P3 line is essentially+26V; this signal voltage makes diode D600-D605 be in reverse voltage and end (Fig. 3); thereby cut-out trigger impulse; thyristor is turn-offed; thereby cut off power supply, play a protective role load.

When (eight) the whole fault-signals of control interface part (Figure 11) are sent to the STOP line; also be admitted to four bistables forming by assembly IC402 and press recording trigger; under the condition that has fault to occur; even master relay disconnects; because protective circuit is powered by stabilized voltage power supply B; malfunction still remains to until reset signal occurring; integrated transporting discharging assembly IC402 forms four bistables and presses trigger; write down four kinds malfunction respectively; four relays are controlled in output respectively; output to input/output interface by relay again, send into respectively again by these two interfaces that this control board shows and the outer setting that connects is in addition carried out analysis and judgement.Because protective circuit and control interface circuit be with independently stabilized voltage power supply B power supply, even like this under the condition that master relay disconnects, control interface circuit still can be noted malfunction, keeps the fault demonstration on control board, until reset signal is arranged.

(9) soft start, classification step-down and the part (Fig. 5 that resets, Figure 10), control interface part and local control board and external control devices connect by 25 core plugs of two standards, and winding diagram is seen Figure 11 b, PLUG2 links to each other with external control devices, and PLUG3 links to each other with local control board.

Soft start and classification reduction voltage circuit (Fig. 5) mainly are made up of three end regulated power supply module I C801 and one group of triode, the input termination power of IC801, output is delivered to 23 pin of control board interface jack PLUG3 (Figure 11 b) earlier, by a potentiometer VREF dividing potential drop (Figure 12), as the input reference voltage VREF (Fig. 8) of phase-control circuit, IC801 and T801 combine and finish soft start function.After energized, because the voltage on the C808 is very low, the T801 saturation conduction, the ADJ pin voltage of IC801 is minimum, and LEVELS is minimum in output, along with C808 charges by R802, T801 is developed to ending by saturated gradually, emitter voltage raises gradually, thereby LEVELS also raises gradually, along with the rising of LEVELS, the thyristor angle of flow increases gradually, load voltage raises gradually, realizes soft start, and the time of soft start is by the charge constant T=R802C808 decision of C808.T805, T806, T807 are provided with in order to realize the classification step-down.For example,, YJK1-1 is communicated with YJK1-2 by external control, then T805 conducting, the ADJ pin voltage of IC801 descends, thereby LEVELS is reduced, if disconnect YJK1-1 and YJK1-2, LEVELS can slowly be raised to original value again.Change the resistance of R805, R806, R820, the amplitude that can regulate step-down.Charged reset function is by reset circuit (Figure 10) protective circuit (Fig. 9 a-9b) and soft start and its realization together of classification reduction voltage circuit (Fig. 5).After the protective circuit action; V1 becomes this signal of high level (Fig. 9 c) is sent to T807 by R481 its utmost point; make the output LEVELS of IC801 descend; when overvoltage or overcurrent condition occurring; do not disconnect earlier the master control circuit breaker; if can reset through judging; can provide reset signal (making the YJK4-1 among Figure 10 be communicated with once with RESET2-2) by external control devices or manual control panel with YJK4-2 or RESET2-1; pass through D426; D429; D430; D431; these five diodes of D432; be sent to protective circuit and five triggers; they are resetted, and the input voltage of load slowly is raised to original working value like this, realizes charged resetting.

Claims

1; comprise a three-phase thyristor all-wave regulating circuit of forming by six thyristors; two stabilized voltage power supplys; a sync generator; a trigger impulse forms circuit; a trigger impulse output circuit; a protective circuit; a control interface; a local control board and the thyristor electric power controller that external control devices is formed; it is characterized in that; its trigger impulse forms circuit and is made up of programmable logic device; before programmable logic device, be connected with three groups of voltage comparators; the trigger impulse of programmable logic device output is after the trigger impulse output circuit amplifies; be linked into the thyristor voltage regulation circuit; said protective circuit also is connected to soft start and classification reduction voltage circuit; reset circuit, the stabilized voltage power supply that inserts protective circuit is the stabilized voltage power supply of separating with other circuit.

2, by the described thyristor electric power controller of claim 1, it is characterized in that described soft start and classification reduction voltage circuit are made of one three end adjustable voltage module, insert a group transistor in its adjustable side.

3, by the described thyristor electric power controller of claim 1; it is characterized in that; two stabilized voltage power supply power supplies of described usefulness, wherein protective circuit is used a stabilized voltage power supply separately, and the input of this stabilized voltage power supply is received before the master relay of described three-phase full-wave regulating circuit.

4, by the described thyristor electric power controller of claim 1, it is characterized in that protective circuit is connected to charged reset circuit, after local control board or external control devices, be connected to seven diodes of five triggers of control.