SU1406699A1 - Device for limiting the angle range of asynchronous system of pulsed-phase control of valve-type converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used in converter control devices. The purpose of the invention is to improve noise immunity. At the output of the comparator 6, a 50 Hz frequency meander signal is input to the input of the phase detector 7. A generator with a frequency of 300 Hz is generated at the output of the generator 9 and fed to the output of the divider 10, the pulses at the outputs of which are shifted by 2/3 relative to each other and have a duration of / 2. Control pulses are generated at the outputs of logic shaping logic block II. The signal from the output of the divider - generator 10 is fed to the second input of the phase detector 7, providing automatic adjustment of the frequency of the generator 9. I Il. (L

Description

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The invention relates to electrical engineering, in particular to converter equipment, and may find application in control systems of valve converters.

The purpose of the invention is the new robustness of the device to limit the range of angles of an asynchronous system impedance: but-phase control of a valve converter.

The drawing shows a structural device s.

The device d. 1 limiting the range of angles of the asynchronous pulse-phase system1 () control of the valve converter contains a unit for 1 shaping sihhropulsov, the outputs of which, by the number of fans 11 of the converter, are connected to the inputs of the unit 2 4 1 . 1eni, the source 3 of the reference voltage, the input of which is formed by the primary transformer transformer 4, is preceded by a dia. So far to the mains voltage phase, the secondary winding of the transformer 4 is connected via phi. 1 5 5 low frequencies to 1 () a pair of pairs) a 6. The device is supplemented by: 1Ы1о equipped with a phase detector 7, complete as an element EXCLUSIVE1: tL llI, C1 lazhivak) 1st filter 8, control Equal, 1 em1 1m generator 9 pulses divide, 1em-forms and slots; 1m 10 three-phase system named 11u, B1 1, based on Johnson's switchgear, and the output of the niiopa t) is connected to the first input (1 o D1, ri Kropa 7, which is smoothed through; (and, P) Tr 8 pod,: | K) chen to the entrance of the unra, 1i en pe) atom) ohm 9 pulses, output to () then) O1 () pod, 1uche11 to the counting input divide. 1 - (| and)) M11r (). I Trex1 |) azn () th system K) imny, ibc () i, output b: 1ka 2 ({yurmirovani limit, 1 vykh tlov management is designed D.1I p () to the key П1Ч through distribution, reader 1 1 impulses to 11raE (, 1 k) pi1m: 1 electrodes of type-) psgo |) s converter, unit 2 of form 11 11ede.1 1 control unit contains, on one, gate valve converter ka ria.ibi 12 tj) (jpMnp (jBainui limiting them) iiy.ibcoB and each cap, 1e - form) ovmn i ii l wide) azre1111t1 (. | impa,: 1s and ilnii m irova ge.ch 14 y: zo1 o by decay P1I |) OK1) 1H), (} The master 15O1 has the meanings. 1upsa and (() ormir () wadding: 1 11) limited) ayu1pego HMiiy, ibca Hm in G1F1 input ()) is organized, 1H 13 innpoKoi o im- T, 1s of each channel of the node, connected to the corresponding output of the divider form1.1P 1P Tpexijia3iioii of the impulse system, after 1-1111, its output is connected to the second | 1 ( ) to the input of the phase detector 7, the second input ()) of the ir short-circuited short-circuit pulse of each previous channel is not connected to the first input (() of the remixer 13 of each pic, chadduk) of its channel, the output is formed. 13 footings Pochei to the entrance form.h 14

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narrow impulse by the decay of the wide, broad pulse 13 and pulse narrow shaper 14 outputs are connected to the second inputs of the limiting impulse generator 15 and forks 16 for the limiting impulse shaper 15, the limiting impulse shaper 15 of the limiting pulse -wdKt are connected to the first input of the limiting impulse 15 16 limiting - niero pulse, the output of which is connected to the S-input of the RS-flip-flop 17 of the distributor AND pulses, the R-input of the flip-flop 17 is connected to the output of the narrow-pulse shaping unit 14 of the second channel of block 2 forming the control angles, the outputs of the triggers 17 form the outputs of the pulse distributor 11, the first input of the driver 16 is limited; its pulse mch, each previous channel of the driver 2 limit control angles is connected via delay element 18 to the output of the previous channel of the distributor 11 pulses according to the ring circuit. the third inputs of the limiting impulses of the formatizers 15 of the AU of all the cells are combined to be connected to the output of the integrator of the impulse-phase control system.

The device works as follows.

A phasing voltage arrives at the input of the source 3 of the reference voltage, this voltage is limited in amplitude to the separators. Transformer m 4 and the frequency, ttr 5 low frequency ps, goes to the input of the comparator 6, the output of which produces a meander signal with a frequency of 50 Hz arriving at the first input of the phase detector 7. The output signal is phase | About detector 7) without smoothing the filter 8 is fed to the input of the controls,: 1 generator generator 9, the output of which produces pulses with a frequency of 300 Hz, coming to the counting input of the three-phase divider of the 10 imp impedance system, for each (.) m from it the outputs, a pulse signal is formed with a pulse duration of 120, offset from the pulses of the other output by 120 °, arriving at the inputs of the unit 12, the outputs of which allow intervals with the required pulse duration for each Kana. ia, which, inlet to the distributor 11, are distributed along the control of the first electrode of the converter valves. The LEEp signal from the output of the last digit of the splitter-forma- tion: m of a three-phase system 10 pulses is fed to the second input of the phase detector 7, thereby providing automatic frequency tuning of the generator 9 according to the principle of phase-locked loop.

Thus, the invention allows the formation of a symmetric system of limiting angles of the pulse-phase control system and the stability of the device.

improve IIOMCXOVC formula of the invention

A device for limiting the range of angles of an asynchronous system of pulse-phase control of a gate converter, comprising a clock shaping unit whose outputs are connected to the inputs of the control limit shaping unit and the input is connected to the output of the voltage source, the input of which is the primary Tpaiic-formator winding designed to be connected to the mains voltage phase, the secondary winding of the transformer is connected through a low-pass filter to the comparator input, the outputs of the block ormirovani limiting the control angle intended for connection through a control pulse distributor yup1im

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Thyristor electrodes, characterized in that, in order to improve noise immunity, the synchro pulses forming unit is equipped with a phase locked loop, I switch on a phase detector, made by an element EXCLUSIVE OR, with a controllable filter, controlled by an imperial amplifier, which is supplied by a 180, but a single, one-time, 180-opt-one module, controlled by an alternator, which is controlled by a single-phase, 1, filter, controlled by an impulse generator, a single, 180-but-one module, which is controlled by a single-phase, one-time filter, controlled by an impedance generator, a single-one, 180, but a 180-opt-one module, controlled by an element, and a single-phase, 180-ny one-one module, a controlled filter, an impulse generator, which is controlled by a single-phase-frequency filter, controlled by an impermeable new wave unit generator, which is controlled by a 180-opt-one module. three-phase pulse system, performed on Johnson's counter, the comparator output being connected to the first input of the phase detector, the output of which is connected to the control input through a smoothing filter The frequency of the pulse generator is P1) connected to the counting input of a three-phase pulse system divider, the outputs of which, according to the number of converter gates, form the outputs of the sync pulse pulses, and the output of the last bit is shifted to the second input of the phase detector .

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Claims (1)

Claim A device for limiting the range of angles of an asynchronous system of pulse-phase control of a valve converter, comprising a clock generating unit, the outputs of which are connected to the inputs of the limiting unit ^and control angles, and the input is connected to the output of the reference voltage source, the input of which is the transformer primary winding, intended for connection to the phase of the mains voltage, 15 the secondary winding of the transformer is connected through a low-pass filter to the input of the comparator, the unit outputs the formation of limiting control angles are designed to be connected via a pulse distributor to the thyristor control electrodes, characterized in that, in order to increase noise immunity, the sync pulse forming unit is equipped with a phase-locked loop, including a phase detector made on an EXCLUSIVE OR MORE element. smoothing filter, controlled pulse generator increased! frequency divider-shaper of a three-phase pulse system, made by Johnson counter, and the output of the comparator is connected to the first input of the phase detector, the output of which through the smoothing filter is connected to the input of the controlled pulse generator in an increased way! frequency, the output of which is connected to the counting input of the divider-shaper of the three phase pulse system, the discharge outputs of which, according to the number of gates of the converter, form the outputs of the pulse sync block, and the output of the last discharge under the keys to the second input of the phase detector. I'm 0/7? coffic network 1/7/77 of the output of the integro rotor with ΉΦ y E | 1R 1 -h | - j g L ¹ # - Compiled by S. Stakeevich Editor L. Povhan Order 3203/50 Tehred & Veres Corrector V. B> traction Circulation 665 Subscribed VNIIIPI of the State Committee of the USSR for Grandfathers Isobogenization g ι k ry g yy 1 13035, Moscow. W -35. Raushskaya nab., D. 4'5 Production and printing company, city of N f: h-ochd. Project, 1