SU1201987A1 - Device for controlling power in m-phase network - Google Patents

Abstract

A POWER-CONTROLLED DEVICE IN THE M-PHASE NETWORK, containing a synchronizer, the inputs of which are connected to the leads for connecting the supply mains, and the outputs are connected to the control signal generator of the controlled valves, the inputs. which are connected to the terminals for connecting the power supply network, and the outputs to the output outputs, characterized in that, in order to expand the functionality and increase the accuracy and reliability of the regulation, it introduces binary counters, a generator, pulses, m bitwise comparison elements , a digital controller, with the zeroing inputs of the binary counters connected to the outputs of the synchronizer, and the counting inputs connected to the outputs of the pulse generator, while the information outputs of the binary counters dF but connected They are connected to the inputs of bitwise comparison elements, the second inputs of which are connected bit by bit to the information output of the digital controller, and the outputs of the bitwise comparison elements are connected to the control electrodes of the controlled gates through the driver of the control signals. : o o id eo

Description

The invention relates to automatic control and can be used in the construction of analog-digital automated power control systems, predominantly electrocouples, ventilation and heating installations. And an electron rotor, a con-type computer in an agricultural type, connected to an AC network.

The purpose of the invention is to extend the functionality and increase the accuracy and reliability of the adjustment. FIG. 1 shows a block diagram. power control devices; figure 2 - timing diagram of the device .. I

The device contains synchronization

torus 1, the inputs of which are connected to buses A, B, C of network 2, and the outputs are connected to the zeroing inputs of binary counters 3, the counting inputs of which are connected to the output of the generator 4 pulses, while the information outputs of binary counters 3 are bitwise connected to the first inputs bitwise comparison elements 5, the second inputs of which are bitwise connected to the information output of the digital controller 6, and the outputs of bitwise comparison elements 5 are connected to control electrodes of the controlled signals through the driver 7 Chains 8, the inputs of which are connected to A, 8, C of the mains 2, and the outputs are connected to the load 9.

The device works as follows.

When a voltage appears on buses A, 6, C of power supply network 2 (Fig. 2 a), pulses appear in the synchronizer outputs (Fig. 2 S, B, -2),.

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coinciding with the moments of crossing the network voltage across zero. These pulses alternately zero binary counters 3. In the intervals 5 between zeroing shuhls (Fig. 2 ft, 2) for a time i, (Fig. 2) equal to the half-time, binary counters 3 count the pulses coming from generator 4

10 pulses. The pulse frequency from the generator must be such that during time i, (Fig. 2) all possible states of binary counter 3 are missed. The number counted in binary counters as a binary code is fed in parallel to elements 5 of a bitwise comparison. To the other inputs from the information output of the digital

20 of the regulator 6 in parallel, in the form of a double-ended code, a number is entered which determines the opening angle of the controlled gates 8. When the numbers arriving at bit-comparison elements 5 coincide, pulses appear on the outputs (Fig.2 U, L, L) are formed by the duration and amplitude of the control signal shaper 7 (Fig. 2m, n, n), act.

30 are pushed onto the control electrodes of the controllable valves 8 and opened in FIG. 2p). Since the digital controller 6 enters all the elements 5 of the one-time comparison, one number, the controlled valves 8

35 open in series with one opening angle (Fig. 2 p). By varying the number at the input of the digital controller 6, it is possible to change the opening angle from 0 to 180 with a discrete dependent

40 of the size of the information output of the digital controller 6 and binary counters 3. For eight bits, the discrete is 256 steps. With this discrete opening angle of 90

45 corresponds to the specified number 128 (figure 2 a, K, L., R.).

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Claims (1)

DEVICE FOR POWER CONTROL IN A W-PHASE NETWORK, containing a synchronizer, the inputs of which are connected to the terminals for connecting the mains, and the outputs are connected to the drivers of the control signal of the controlled gates, inputs. which are connected to the terminals for connecting the mains, and the outputs - to the output terminals, characterized in that, in order to expand the functionality and increase the accuracy and reliability of regulation, it also includes binary counters, a pulse generator, pulses, m elements bitwise comparison, a digital controller, and the zeroing inputs of the binary counters are connected to the outputs of the synchronizer, and the counting inputs are connected to the outputs of the pulse generator, while the information outputs of the binary counters are bitwise connected to the inputs of the bitwise comparison elements, the second inputs of which are bitwise connected to the information output of the digital controller, and the outputs of the bitwise comparison elements are connected to the control electrodes of the controlled valves through control signal generators.