DE2049830A1 - Device for parallel operation of pulse-controlled ripple control transmitters - Google Patents

Description

Device for parallel operation of pulse-controlled All around expensive

The invention relates to a device for the parallel operation of pulse-controlled ripple control transmitters, each with a multiple = phase inverter as transmitter output stage and one of one common synchronization signal source guided grid control = set, which a frequency pre-multiplier and a counter = ring for in-phase control of the inverter valves, the counting ring from its Starting zero position can be brought into the working position.

In ripple control technology, the pulse programs to be sent are located at spatially separate points of the electrical energy = Supply network via ripple control transmitters operated in parallel fed in. The transmitted pulse programs are made up of a large number of individual tactile pulses with pulse lengths and intervals composed of a few seconds, with each key pulse consisting of a finite sequence of multiphase, sinusoidal Ripple control signals exist. In order to beat or extinguish the Ripple control fed in by the individual ripple control transmitters = avoiding signals is a phase-synchronous parallel operation the ripple control transmitter required.

20.9 816/0706

It is known (DT-OS 1 438 407) to control the output stages of the ripple control transmitter, which are designed as externally controlled inverters, via ring counters which are synchronized from a common signal source. The high-voltage lines of the energy supply network are used as transmission paths for the synchronization signals from the central signal source to the individual ripple control transmitters, but they have the disadvantage that the transmission of the synchronization signals is temporarily distorted or interrupted due to atmospheric disturbances \ can be. When a momentary loss of synchronization 'experience the parallel ripple control signals fed mutual phase deviations of up to 2o el,> so that the synchronizing signals erroneous synchronizations occur when re = \ traffic. The changes in the period duration of the synchronization signals caused by transmission distortions also result in incorrect synchronization, since the synchronization that occurs when the synchronization signals pass through zero takes place at uneven time intervals

It is the object of the invention to specify a device of the type described above, the incorrect synchronization in Avoids transmission disturbances of the synchronization signals.

This object is achieved in that as Frequency multiplier stage, a pulse oscillator is provided which can be connected to a pulse shaper, such that diß an AND element connected in the signal branch between the pulse shaper and the pulse oscillator if the syn = fails chronisiersignale from a second bistable, multivibrator of a release branch is acted upon with a blocking signal, that when the synchronization signals return within a key pulse, the AND element only after termination of the key pulse receives a release signal that by Umkippen.des second bistable multivibrator by means of one of the rear

209816/0706

Mt 4 F 1 (870 10OC0 / KE)

Flank of the reset pulse derived from the tastini pulse is that the output of the pulse shaper with a monitoring = branch is connected, which connects the second input of the AND element downstream V / E further UIID element in the manner with a Output pulse applied to that at the output of the further UHD element only when the output signals of the Signal branch and the monitoring branch a synchronization pulse is present.

A further development of the invention is that for Ab = conduction of the reset pulse for the second bistable Milti = vibrator a connected to the tactile pulse source second monostable multivibrator is provided, which also has a first bistable multivibrator acts on the Sählring in such a way that the counting ring after each completion Key pulse is switched off by the pulse oscillator tipping over the first bistable multivibrator and returned to its starting position is postponed.

The invention with its details and advantages will be explained using the exemplary embodiment illustrated in the drawings explained in more detail; it shows:

1 shows a time diagram of a transmitted pulse program

Fig. La is a timing diagram 'of a single key pulse from the pulse program

2 shows a block diagram of the device according to the invention and

Fig. 3 a-f time diagrams of the at individual points of the switch = j Fig. 2 occurring electrical quantities. j

200818/0706

The pulse program to be sent consists of a start pulse and a number of subsequent command pulses (Fig. 1). the The scanning time of the individual impulses was 1 second in a sent impulse program, with the command impulses at intervals 1.5 seconds were keyed and after the start impulse 2.75 seconds were waited other sampling times and pauses possible.

For a better understanding of the invention, pulses of the transmitted pulse program according to FIG. 1 which are sampled simultaneously by two transmitters are shown in FIG. Each of the two gating pulses is ripple control signals from a finite number of multi-phase, '· Finusförmigen, for example a dreipha = j sigen signal with the phases R, S, T or R ^1, S ^1, T. ¹ In order to avoid phase deviations between ripple control signals with the same phase position I, the multiphase ripple control signals of both; Synchronized tactile pulses. Does not apply to the well-known facility I.

i the common synchronization at time t. off, so different =

ben the now unsynchronized ripple control signals j

up to 20 ° el. against each other. Turn the sync too!

Time t ~ again, the first garbage passage of the two;

synchronized three-phase ripple control signals. As a result of the i

Phase shifts of up to 2o el can be achieved by this zero crossing j

in the ripple control signal of the first transmitter to an R phase ■ hit, on the other hand, with the broadcast, expensive signal of the second transmitter

to an S ¹ or T 'phase, so that the two transmitters asynchronously:

work, although their ring counter of synchronization signals i

can be controlled. This undesirable result is avoided in the present invention in that after failure

the synchronization at time t. the synchronization signals j switched off and only at the beginning of the next touch pulse can be switched on again in a defined manner, so that at the time

ι t ₂ recurring synchronization signals to no incorrect synchro- i

ηisation can lead. I.

2 ü 9 B 1 6 / 07ÜÜ

Ι ', ι ■' ■ \ ·. · ": ■■■; ' I r!

An exemplary embodiment for the circuitry implementation
Solution of this inventive concept is shown in FIG.
The ripple control transmitters operated in parallel, of which only
the transmitter output stage 1 of one of the ripple control transmitters is shown
are synchronized by a common signal source 2. ! The synchronization signals, the frequency of which corresponds to the ripple control signal = i frequency, are fed to the grid control sets of the transmitter output stages 1 through transmission lines 3 j. A pulse shaper 4 is arranged on the input of each grid control set, which converts the sinusoidal synchronization signals into square-wave pulses of the same period. As a pulse shaper 4 can
for example a so-called Schmitt trigger or a saturated =
ble pulse transformer can be provided. The output of the pulse shaper 4 is via a signal branch 5 with the control =!

ι input of a frequency multiplier stage 6 connected, where j the square-wave pulses of the pulse shaper 4 by a in the signal = | branch 5 connected differentiator 7 in! rebuke impulses unwan = | are delt.

According to the invention, an electro = ^ is used as the frequency multiplier stage 6

i nischer pulse oscillator is provided, as shown, for example, in Figure 4.9 of the General Electric manual "CONTROLLED RECTIFIER MANUAL", 1st edition, p. 52. The number of j from the pulse oscillator during a sync signal =
The pulses emitted during the period are based on that for the
Transmitter ends stage 1 selected inverter circuit
from a three-phase ripple control signal, for An =
control of the valves of known six-pulse inverter circuits = lines six output pulses of the pulse oscillator 6 per syn =
Chroning signal period required while in use
a four-pulse inverter in a so-called Scott circuit
four output pulses are required. The synchronization of the
Output pulses from the pulse oscillator 6 take place when activated

209816/0706

P ..! Λ F 1 (6Ό \ <y · Kf.)

dos first valve of transmitter output stage 1. To control the control electrodes of the valves in the correct phase sequence is between your pulse oscillator 6 and the transmitter output stage 1, a dial ring 3 is arranged, which is connected on the output side separately to each control electrode. For touching the valves according to the pulse program, the control electrodes are common AND element 9 connected upstream, the key input of which connect to a key pulse source Io common to all grid control sets is. The AND gate 9 is released when a key pulse is applied, so that the valves of the transmitter output stage 1 only within the key duration. At the same time when a key pulse is applied to the AND element 9, the first input a first bistable multivibrator 11 with the touch pulse acted upon, whereby it tilts from its starting position "0" to position "L". As a result of the overturning of the bistable Multivibrator 11, an AND element 12 connected between the pulse oscillator 6 and the counting ring 3 is enabled, so that the counter ring 3 with the output pulses of the pulse oscillator =; tors is acted upon and runs in the working position.

The idea of the invention now consists in removing the Syn = chronisiersignale to keep the signal branch 5 locked until the beginning of the following touch pulse. For this purpose the Diffe = decorative element 7 on the input side with an IOD element 13 as well Connected on the output side with a further UÜD element 14 and between the inputs of the AND gates 13 and 14 that are not acted upon by synchronization signals, a release branch 15 placed. The trigger branch 15 has an integrating element 16 and a second bistable multivibrator 17 and is controlled by controlled by a monitoring branch 13, the sin delay element 19 as well as a downstream first nonostable ilultivibra = has gate 2o. The monitoring branch 18 is with the output

209816/0706

PaMF 1 (6 * ü iCft.fl-Kh)

of the pulse shaper ;? 4 connected and activated in the event of failure the synchronization signals or the square-wave pulses the input of the integrator 16 nit a continuous pulse. The integrating = member 16 responds to the continuous pulse in such a way that it sets the first input of the second bistable multivibrator 17, which is connected to its output, and this from its output = state "L" toggles to state "O". By tilting the second bistable Ilultivibrator 17, the AND gate 13 j locked, so that the pulse oscillator 6 oscillates unsynchronized; The AND gate 13 remains blocked until the second bistable multivibrator 17 is triggered by a reset pulse on its second Input is tilted back to the initial state "L". This Reset pulse is provided by a second monostable multivibrator 21 generated, which responds to the key pulse pending at its input in the Vieise that it is only from its rearward Edge, but not from its leading edge. The reset pulse is sent through a second input of the second bistable multivibrator 17 upstream Ver = delay element 2o delayed briefly so that the U: iD element 13 is released with certainty only after the end of the key pulse disturbed in the synchronization. The one from the second monostable multivibrator 21 output reset pulse beauf = Schlag'ferner the second input of the first bistable multi = vibrators 11, thereby returning to the starting position "O" = is tilted and locks the counter ring 8 via the U'ID element 12, as well as in its starting position.

In addition to controlling the In the event of failure of the synchronization pulses, triggering branch 17 also has a second monitoring function, namely in the event of distortions the synchronization signals. When this malfunction occurs, the output signal also indicates monitoring monitoring 13 the input that is not subjected to synchronization pulses of the UMD member 14 is pending, the Ü'JD member 14 is only free, if the period of the synchronizing signals or the

209816/0706

BAD OFUQ (HAL

Square pulses not exceed or fall below a specified fourth = strides.

To explain this second function of the monitoring branch 18, FIGS. 3a to 3f show the signal curve over time at the input of the pulse shaper 4 (FIG. 3_a), at the input of the monitoring =; branch 18 (Fig. 3b), at the output of the delay element 17 (Fig. 3c) , at the output of the first inonostable multivibrator 2o (Fig. 3d) and Fig. 3e) and aia output of the differentiating element 7 (Fig. 3f). The sinusoidal synchronizing signal (Fig. 3a) supplied to the pulse shaper 4 by the synchro = nisiersignalquelle 2 is converted by the pulse shaper 4 into a square pulse (Fig. 3b) of the same period. The square-wave pulse present at the input of the delay element 19 is delayed by the time period t. The leading edge of this delayed pulse scans the first monostable multivibrator 2o, which is then used to emit a pulse of duration T (Fig.

3c) The pulse duration T corresponds to inner time constant of the first monostable multivibrator 2o and can be adjusted within specified limits.

The output of the monostable multivibrator 2o is not upstream of the illustrated inverter, which converts the pulse according to FIG. 3d into an inverse pulse according to FIG. 3e. This inverse impulse lies together with that of the differentiating element 7 iladelimpuls generated from the rectangular pulse according to FIG. 3b (FIG. 3f) at the inputs of the AND element 14, so that the UUD element

14 only turns on when the needle pulse according to Fig. J 3f within the duration of the inverse output pulse of the second j

monostable multivibrator 2o is. In this way it is ensured that in the event of a distortion of the synchronizing = Signal and the associated change in the needle pulse = follow the synchronization of the Irtpulsoszillator 6 does not occur, so that incorrect synchronization is avoided.

209816/0706

['at 1 Γ Ι' 5Ό 1 (WKE)

The advantages associated with the invention lie in the fact that in the event of disturbances in the synchronization signals during a keying of the transmitted pulse program, the synchronization of the pulse =

ι oscillator 6 switched off and only after the distortion has ceased; or if the synchronization signals failed before, they are only switched on again at the beginning of the following key pulse so that incorrect synchronization of the pulse oscillator avoids = the v / earth.

209816/0706

Claims (1)

- Io - Patent infringements Device for the parallel operation of pulse-controlled rotary control transmitters, each with a high-phase inverter as the transmitter output stage and a grid control set run by a common synchronization signal source, which has a frequency multiplier stage and a counter ring for the correct-phase control of the converter valves, the counter ring from its output Zero position can be brought into the working position, characterized in that a pulse oscillator (6) is provided as the frequency multiplier = stage and can be connected to a pulse shaper (4) in such a way that an in the signal branch (5) between the pulse shaper (4) and the Pulse oscillator (6) switched U'JD element (13) in the event of failure of the synchronization signals from a second bistable multivibrator (17) of a release branch (15) with a blocking signal so that when the synchronization signals return within a tactile pulse, the AND element (13 ) only after completing the T astinpulses j receives an enable signal which is formed by overturning the second i bistable multivibrator (17) by means of a reset pulse derived from the backward flank of the tactile pulse, so that the output of the pulse shaper (4) is connected to a monitoring branch (18), which applies an output pulse to the second input of a further AND element (14) connected downstream of the UIID element (13) in such a way that at the output of the further UÜJD element (14) only when the output signals of the signal branch ( 5) and monitoring branch (18) a synchro = nisierimpuls is pending. - 11 - 209816/0706 -U- Device for parallel operation of pulse-controlled Ripple control transmitter according to Claim 1, characterized in that that to derive the reset pulse for the second bistable multivibrator (17) a rait of the tactile pulse source (10) connected second monostable .multivibrator (21) is provided, which also has a first bistable multivibrator (11) on the counting ring (3) in the manner has the effect that the counting ring (8) after the end of each Tast = inpulses by overturning the first bistable Mxiltivibrator (11) switched off by the instantaneous oscillator (6) and in its starting position is reset. 209B16 / Ü706 Pat A F 1 iS? 0 10TT.KE) Blank page