SU675573A1 - Method and device for shaping control pulses of multi-phase heavy-duty thyristorized converter - Google Patents

Description

(54) METHOD FOR FORMING PULSE MANAGEMENT

Claims (2)

POWERFUL MULTI-PHASE THYRISTOR TRANSFORMER AND DEVICE FOR ITS IMPLEMENTATION 12 ogr yyyengi limit angles of control of pre-spruce spruce; mode (poy. min) to ekel & t: just-w-pul puls of the current in the load (the engine is covered) and it (from the electrical system - | 5 (5yrvyvod and thyristor converter phone. When you exit the phase-mixing devices of the system the control and the block of the limit angles of regulating the converter, it is possible the breakdown of the inverter, leading to the emergency mode and failure for a long time of the entire converter, ---V. - -; The aim of the invention is to improve the reliability of the transformer frequencies. These are given by the fact that power pulse control devices for multi-phase thyristor converter with n-channels phase synchronization% Yyyyy SS) total voltage after; y.1 and Schroean: invert the bias voltage to invert and form pytST variable rectangular voltages, when summed in my variables, The negative values of the form are the pulses of pulses, the foreframes of which are used to duplicate the control pulses: the second in the Yyver% Ory mode for the odd channels of the converter, and the rear ones in coping mode for even channels of the converter, while forming a series of square impulses from the opposite phase synchronizing voltage, the Backward., FrMMTyrSype is used in a single-sided impulses, for odd channels, I’ve got the right space for me. converter A device for carrying out the proposed method additionally supplying O1yustyu zero organs and Two three-input elements coincide Dyon, with the inputs of the YulB-Yrganov connected to the output of an adjustable source of DC voltage, the inputs of the first three null-bodies connected to the outputs of the form / mrb1 phase synchronizing voltages, 1 | Sda Ostaykyyyyyyyyyyyyyyyyyyuyu - with outputs of antiphase voltage formers, the outlets of the first three zero-or1 ga connectors of the first element of the first one coincide, and the outputs of the other three to the inputs of the second element of the match, the outputs of both elements of the match are connected to the inputs of the null organs of the even and odd channels of the converter. According to the proposed method (they form duplicating nvJtbcQ controlling them from the reference synchronizing sinusoidal voltages that have some kind of power supply to the network. Phase of these IpulcoviOnS , then summarize these voltages and get a series of right impulses with a six-fold power supply network, the front of which is used for duplicating; in invertor mode for odd kVAl converter, and the rear ones - invative mode for even converter channel. From the antiphase voltages they also form another series of right-angle impulses, but shifted relative to the first one by 60 electr. bias). The back edges of the ZeHI pulses are used to duplicate control pulses in the rectifier mode for even channels of the converter, and the front ones in the inverter mode for the converter channels. ; -. . Ya fig.D. A diagram of a device for controlling a powerful multiphase thyristor converter is shown; Fig. 2, 3 - Diagrams explaining the proposed method for generating control pulses with a powerful multi-phase thyristor converter. In the drawings, the following symbols are taken to be {1 - phase synchronizing reference sinusoidal voltage drivers; 2 - formers of phase synchronization of their reference sinusoidal voltages; a H 4 ... 4c-zero-organs of even and odd channels of the converter; 5 - regulating source of constant bias voltage; 6 ... additional null organs; 7.8 - three-input elements match:. . U., u, .u - phase reference clock synchronous sinusoidal voltages (odd channels of the converter); n.u.niig, - antiphase reference syn sync and chronizing sinusoidal voltages (even channels of the transducer); and ““, on „..- weekend rectangular on ... Ovbme P additional zero-organs; UjMx device first output, s; which duplicate / 1-second pulses are taken for control (by the FIFTH channel in the inverter mode and by the second channel in the rectifier; - the second output of the device, with which the duplicate pulses are removed to control the first channel in the inverter mode and the fourth channel in the rectifier; lJewx7 third the output of the device from which duplicate pulses are taken for control, the third channel in inverter mode and the sixth channel in the rectifier; UBMXS is the fourth output of the device from which duplicate pulses are removed for control and the fifth channel in the rectification mode.; and the second channel in the inverter; UtiKi.o the fifth output of the device, from which duplicate pulses are taken to control the first channel in the rectification mode and the fourth channel in the inverter; Ujyxg- sixth output of the device, s which duplicate pulses are taken to control the third channel in the rectifying mode and the sixth channel in the inverter mode; I ft - time intervals of 60 eh. The inputs of the zero-organs of the b ... 6 6 are connected to the output of the controlled source 5 of the constant voltage biases, the inputs of the zero-organs 6j ,, .6j are connected to the formers of the 1 phase reference sinusoidal synchronicons, the inputs of the zero-organs 6 | , ... 6b- with formers of antiphase support sinusoidal voltages 2, the outputs of the zero-organs 6u "... 6j are connected to the inputs of the matching elements 7 and the outputs of the zero-organs of the bc ... 6g - to the inputs of elements 8 and 8, the outputs of both elements are coincident with the outputs of the null organs of even and odd channels braeovatel 3, ... Sn and 4 "... 4g). The device (Fig. 1) works as follows. For example, at the time point to-tj and at a bias voltage equal to zero at the input of the zero-body 6 (positive voltage b / l is applied to the zero-body 6 - negative voltage C / I to the zero-body b - positive voltage C / s, etc. (see $ 7.2a). Since the voltages are applied to the inerting inputs of the zero-organs, inverse outputs are removed at x outputs (FIG. 2 b-g). 6 (FIG. 26) is fed to the first input of the coincidence element 7, the signal from the zero-body 6 (FIG. 2b) is fed to the second input of the circuit 7 (FIG), and the signal from the zero-body 63 (FIG. 2 g) to the third The first input of circuit 7. At time t, -tj, the signal T / VSSD (fig. 2d, e, e and fig. 3m) is formed by the coincidence circuit 7 when the negative values of the output voltages from the zero-organs bz and 6 coincide. pulse (U6bix7}) serves to duplicate the control pulse of the third channel of the control system of the converter operating in the inverter mode and for the fourth channel in the rectifying mode. At time t / outputs of the coincidence circuit 7, there are no output signals, because at this moment time does not match the negative values of the output on stubs of zero-organs 6, ... .63 (Fig.26, c, d). At this point in time (), the output of the ijyx signal is removed from the output of the coincidence circuit 8, the leading edge of which is shifted by 60 al. relative to the impulse formed at time. This pulse serves to duplicate the pulses of the first channel in the rectification mode and the fourth channel in the inverter mode. At time (), the pulses from the coincidence circuit 8 are not removed. Similarly, duplicate pulses of AND are formed at other times (s-b, ts-tg, etc.). With a change in the bias voltage level, the duration of the generated pulses and their phases, a, change. The generated pulses are fed to the corresponding outputs of the phase shifting devices of the converter. They i duplicate the control pulses and the pulses of limiting the control angles of the converter. Here, duplicate pulses are introduced into the control system, in the rectifying mode they lag behind (by about 30-50 ks), and in the inverter mode they are ahead (by 30-50 ks) the limiting impulses of the control angles and. Therefore, in the absence of control pulses, limiting pulses formed by the block enter the operation, duplicating the control pulses at a given level of limitation. In the case of the limiting block failure, the duplicate pulses act as control pulses (also practically at a given level of limitation). When introducing special logic acting on the source of 5 adjustable-displacement voltages and changing the phase of duplicating pulses in the function of changing control pulses, it is advisable to introduce duplicating pulses in the absence of control pulses so that the bids ahead of limiting particles in the rectifying mode and from from limiting impulses "MAX, in the inverter mode. Duplicate pulses can also be entered into the information part of the converter and directly through the amplifier-shapers of the converter. After appropriate processing, pulses can be inserted into the preamplifiers and output amplifiers of the converter. The proposed method of forming duplicate pulses and a device for its implementation provide an increase in the ng1 reliability of a multiphase powerful thyristor frequency converter, as with; The malfunction of the information part of the control system and the limiting limiting control angle limiting unit eliminates the emergency mode (inverter breakthrough) and ensures the operation of the frequency-controlled electric drive. The proposed device can be performed on just two printed circuit boards 150 x 170 mm in size (the size of a typical UBSR-AI cell ) for a multi-phase thyristor transducer assembled in a two-phase equivalent circuit with a six-phase load, having 144 control channels. . Claim 1. Method of forming control pulses with a powerful multiphase thyristor converter with n-channels, on which vertical phase synchronous sinusoidal voltages and a constant bias voltage are summed up according to the vertical principle, with 1He very reliable converter, phase synchronous sinusoidal stresses after summation with a constant bias voltage invert and form variable rectangular stresses, when summed up at negative values form a series of arc-shaped pulses, the leading edges of which are used to duplicate control pulses in the inverter mode for the odd-numbered converter channels, and thickening - in the rectification mode for the even-numbered converter channels, while from the antiphase synchronous sinusoidal voltages form a series of rectangular pulses, the back edges of which are used in rectifying. the mode for the odd-numbered converter channels, and the front ones - in the inverter mode for the even-numbered channels of the converter. 2. An apparatus for carrying out the method of claim 1, comprising an adjustable source of constant bias voltage, phase and antiphase clock, sinusoidal voltage, outputs which are connected to the inputs of the set and odd channels of the converters, characterized in that it is additionally equipped with six zero-bodies and two three-input matching elements, and the inputs of the zero-bodies are connected to the output of an adjustable source of direct voltage bias, the inputs of the first three null organs are connected to the outputs of the phase synchronizing voltage formers, the inputs of the other null organs with the outputs of the forma phase antiphase voltages, the outputs of the first three null organs are connected to the inputs the first element of the match, and the outputs of the other three to the inputs of the second element of the match, the outputs of both elements of the match are connected to the inputs of the null organs of the even and odd channels of the converter. Sources of information taken into account in the examination 1. Thyristor frequency converter with direct connection for a 3400 kW electric shear drive, technical report VNIIElectrical drive OLA.082.961, 1972 2. Authors certificate of the USSR 508691, kl.N 02 R 13/16 1973. N M N NN n. nUtMA