SU762093A1 - Arrangement for ensuring automatically the independent supply of users from two standby power sources - Google Patents

Description

The invention relates to the power supply of industrial enterprises, and more specifically to devices for automatically providing separate power supply sections when voltage is restored at a redundant power source used for different consumers.

The closest technical solution to the proposed is a device for automatic voltage recovery on the line, containing consumer tires, powered through switches from different Vaimoreeri-5 power sources, voltage relays connected to power sources above the installation sites of input switches through voltage transformers , and a control device of 20 switches, made, like a voltage relay, on the contact equipment and containing a large number of relays (intermediate and time relays nor) p].

However, the device does not have an AV, - 25 tonnage due to the presence in its scheme and the automatic switch-on scheme (ATS) of interlocks, which make it impossible for one device to work when 6πο fails.) Θ

2

kirovochnogo element of another device. This significantly reduces the reliability of the known device. In addition, the presence in its scheme of a large number of contact equipment further reduces the speed and reliability of its work. In the device for the switching time, parallel operation of power sources is provided, and the occurrence of an accident at this point will not provide the necessary selectivity of the relay protection.

The purpose of the invention is to increase reliability and speed, the elimination of parallel operation of power sources, on one section of tires.

This goal is achieved by the fact that in the device for automatic provision of separate power supply to consumers from two redundant power sources, connected through input switches to a busbar-split system containing a voltage control relay for power supplies connected to the input of a switch control unit whose outputs are intended for connection to introductory and sectional switching circuits

762093

ten

The circuit breakers, the control unit of the circuit breakers contain two pulse shapers and the logic element OR, the inputs of the pulse shapers are connected to the inputs of the switch control unit, and the outputs of the drivers. pulses through an OR gate ⁵ podklyuche- us to output switch control unit "," pre designated dlyapodklyu • chepyya "ktsopi switching section switch, and directly - to turn off the outputs of the control unit""""" MY7 intended for podklyuche.niy'K "chains turning on the input off ~~ chatter.

In addition, the device introduced two delay lines, the input of each of the 15

"which is connected to the output of the corresponding pulse shaper, and the output is intended to be connected to

corresponding to 'input ^ but ^ b' ^ her ^ luch'atel. 20

FIG. 1 shows a block diagram of the proposed device; in fig. 2 and 3 are temporary diagrams explaining the operation of the device.

''. Device for automatic ....... '

provision of separate power supply for consumers from two reserved sources

- “Power supply finder” contains 1 consumer tires, powered from different sources through input Switches.

2 and 3, sectional switch 4, relay 30 '

'5 and 6 voltage controls (power supplies), "" with their inputs, connect the ’^ yy ^ GZH ^ och yy Ka'M' 'MT and ny‘' 'Your “Place settings input, switches 2 and 3,

'through transformers 7 and 8 voltages.35 The outputs of the relay 5 and 6 voltages' switch-on. control inputs 9

"" "" switches, consisting of two shapers of 10 and 11 pulses, performed ""; on semiconductor logic elements, and logic circuit 12 OR. '

45

50

Each PS of shapers 10 and 11 are pulses, its input is connected to the / output of the corresponding relay 5 and 6 "" ^ "Voltages" and its output is connected via the logic circuit 12.'IL to the Executive Sectional Shutdown Mechanism "4, and Also, with the actuator of the corresponding input switch 2 and Z. The lines 13 and 14 of the delay ~~ 'are set between each of the formers of the 10 and 11 pulses and the executive mechanism correspond to the “spark of the input switch 2 and 3.”.

"'Device" works as follows:' R ' ^aa 0m., "_____ ........

The “y'Schevozvonyi” power supply on one “sourcing of sources” device “AVR)“ turns on a sectional switch and provides 60 ”electrical supply to consumers

from another (backup) source pi ** '' "^” 'tShs' τϊορί /' "POCA" 'voltage Ugayyo' '' * 7

on reserved (disconnected) ' ^and, "" nd "ё -"' .........

Tochnikyo not recover, at the exit, "55

55

Formers 10 and 11 pulse signals are absent.

When the voltage on the back-up source is restored to the voltage set in the relay 5 and 6, the latter is switched on and simultaneously with the formation of the output ¹ signal, forms a signal on the corresponding driver 10 and 11 pulses of the switch control device 9. The signal from one of the drivers of 10 or 11 pulses through logic circuit 12 OR is fed to the actuator of the section switch 4 and turns it off, the same signal through the delay line 13 or 14 is fed to the actuator of the corresponding input switch 2 or 3 and turns it on . this provides separate power sections when voltage is restored 'on a redundant power source.

Parallel operation of power sources is eliminated by installing lines 13 and 14 of delays. The magnitude of the delay set in them is determined by the time of disconnection of the sectional switch 4 and the time on. input switches 2 and 3 so that, by the time the input switches 2 and 3 are turned on, section switch 4 is already turned off. If parallel operation of power sources is allowed, then lines! 3 and 14 delays can be eliminated.

When separate sections of busbars are supplied from different sources, the loss of power at one of them when the voltage drops below the fitting • will trigger the voltage relay installed on this input, and a signal is generated at the output of this voltage relay, which then goes to the input of the corresponding shaper 10 and 11 pulses. There is no signal at the output of this pulse shaper, since it generates a pulse ·· only on the leading edge of the input pulse. Therefore, the output of the control device switches 9 signals do not occur. Thus, the proposed device does not prevent the automatic activation of the backup power-on device. ·

The advantages of the proposed device, in comparison with the known ones, are in ensuring the independent operation of this device "and the ATS device / as the interlocking elements of both schemes are excluded;" simplifying the design and reducing the metal consumption - due to the implementation of the proposed device on the semis. water logic gates; expansion of the field of application of the device, since it can be manufactured as a separate functional unit and at 5 762093

change with different schemes of automatic transfer switch} improving reliability and speed due to the lack of contact equipment in the device; elimination of parallel operation of power sources on one section of tires.

As a result of using the proposed device at enterprises, the damage is eliminated due to undersupply of products as a result of the failure of the ATS device when the blocking element of the device circuit fails to automatically provide separate power supply to consumers from two redundant power sources.

' 15

Claims (2)

Claim 1. Device for automatic provision of separate power supply to consumers from two redundant power sources connected via input switches to a bus system partitioned by a switch containing a voltage monitoring relay for power supplies connected to input 25 of a switch control unit whose outputs are intended to be connected · to the switching, input and sectional circuit breakers, of which there is the fact that, in order to "increase the reliability and speed of operation, the switch control unit contains Dwi pulse shaper and logic element YLI, and the inputs of shaper drivers are connected to the inputs of the switch control unit, and the outputs of the shaper drivers through the OR element are connected to the output of the switch control unit intended for connection to the circuit breaker on circuit, and directly to the “output” 'I will give the control unit of the switches intended for connection to the' switching-on circuits of the input switches. 2. Device pop. 1, characterized in that, in order to exclude parallel operation of power supplies to one section of buses, two delay lines are introduced into it, each input is connected to the output of the corresponding pulse shaper, and the output is intended to be connected to the start circuit - 't the introductory breaker.