SU1534636A1 - Quick-acting device for automatic switching-on of standby power source - Google Patents

Abstract

The invention relates to electrical engineering and can be used in automatic load transfer devices from main power sources (PIs) to reserve ones. The purpose of the invention is to increase the reliability, speed and expansion of the functionality of the device. The device provides power to two bus sections (SS) 13 and 14 from three PIs 1–3 connected to the SS through thyristor power switches (CB) 7–12. The CBs are controlled by signals from sensors 4–6 and 5–18 of the voltage controlling the quality of the voltage of the IP and the school, the logical part of the device through the unit 25 switching relay. The logical part of the device contains a CB control unit 21 for detecting a CB breakage, a CB control unit 22 for generating signals for switching the CB on and off, an interlock block 23 for protecting against the connection of multiple IPs to one USh, a control control unit 24 for detecting situations where the CB control unit 22 generates control signals for switching on several PIs on one SS, and an alarm and display unit 26. In the normal mode, when the IPs 1 and 2 are operational, the secondary school 13 receives power from the IP 1 via CB 9, and the secondary school 14 - from IP 2 via CB 11

PI 3 (d

5n 02k 15/02 in "magnetic circuit of an electrical machine and method of manufacturing a magnetic circuit of an electrical machine" All-Union Research, Design and Technological Institute of Electrical Engineering of Nikolay A. Morschakov

Petrishchev Pavel Nikolaevich

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Description

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(CB monitoring, designed to determine CB type failure failure, CB control unit 22, designed to generate signals for switching the CB on and off, interlock block 23, designed to protect several IPs from connecting to one SSh, control control unit 24, to take you into situations when the CB control unit 22 generates control signals for switching on several PIs on one SS, and the alarm and indication unit 26. In normal mode, when

The invention relates to electrical engineering and can be used in automatic load transfer devices from main power sources (PIs) to backup ones.

The purpose of the invention is to increase the reliability, speed and expansion of the functionality of the device.

Fig. 1 shows a structural scheme of a high-speed automatic backup power-up device; Fig. 2 is a functional diagram of a logical part of a high-speed device for automatically switching on a backup power supply; Fig. 3 shows the truth table of the control unit of power switches.

The device (Fig. 1) contains voltage sensors 4-6 connected to power supply sources 1-3 (PI) 7-12, power switches (SV) 7-12, operable PI connected to sections 13 and 14 of buses (SS), sensors 15- 18 voltages that control the voltage on the corresponding SS, OR elements 19 and 20, the CB control unit 21, the CB control unit 22, the block 23, the control monitor block 24, the relay switching block 25, the alarm and display unit 26. The logical part of the device (FIG. 2) functionally integrates the blocks 21-24 and 26 of the device. Unit 2 of the SV health monitoring contains six similar sub-blocks 27-32, each of which contains an element AND-NOT 33, an element OR-NOT 34, a delay line 35, a return button 36, an element OR 37,

The SPs 1 and 2 are capable, the secondary school 13 receives power supply from the IP 1 via CB 9, and the secondary school 14 - from IP 2 via CB 11; The UI 3 (diesel generator) is in reserve and, if necessary, is started automatically or manually. When all three IPs are operational, the secondary school 12 receives power from the IP 3, in the event of which the secondary school 13 connects to the IP 1, and the secondary school 14 receives power from the IP 2, and if the secondary school 14 fails, it connects to the IP 1. both NL is carried out from the third PI through the corresponding CB. 3 il.

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The CB control unit 22 comprises two similar sub-blocks 38 and 39, each of which contains elements NO 40, OR-NOT 41, AND 42, OR-NOT 43, NO 44, And 45, and three delay lines 46-48. Control control unit 24 contains two similar sub-blocks 49 and 50, each of which contains three elements AND 51-53. Block 23 block contains two similar sub-blocks 54 and 55, each of which contains three elements OR NOT 56-58 and three elements AND L9-6.

The device works as follows.

In the normal mode, when the PI 1 and IP 2 are operational, i.e. high-quality electric power is supplied, secondary school 13 receives power from IP 1 via CB 9, school 14 receives power from IP 2 via CB 11, IP 3 is in reserve. As the PI 3, a diesel generator is used, which is started in the event of a failure of one of the PSs, or manually if necessary. Taking into account that power supply unit 3 cannot operate in idle mode, and by ensuring high reliability of power supply by supplying school 13 and 14 from different power supply units, the following power supply priority is introduced into the control system of power switches.

In the case when the three PIs are operational, a diesel generator (PI 3) is connected to the secondary school 13, if it fails or is disconnected, the IP 13 is connected to the school 13; with an inoperative diesel generator and the SP 1, the secondary school 13 receives power from the SP 2.

In the case when the three PIs are operational, the secondary school 14 receives power from the IP 2, if it fails, the secondary school 14 is connected to the IP 1; in case of failure of the SP 1 and 2, the secondary school 14 receives power from the diesel generator.

Voltage monitoring is carried out using voltage sensors 4-6, 15-18, which give logical 1 to the output, if the monitored voltage is within acceptable limits. If the monitored voltage is out of tolerance, then the output of sensors 4-6 and 15-18 voltages are formed logical O.

Switching on and off of the CB is carried out by the block 25 switching relays according to the signals from the outputs of the logical part of the device. SV performed on thyristors.

Suppose the system is in normal mode (IP 1 and 2 are operational) and IP 1 fails.

the output of the sensors 4, 15 and 16 voltage 25 OR 19 and 20 and block 23 block.

a logical O is generated, which enters the logical part of the device, which generates control signals to disconnect the CB 9 and turn on the CB 8. At the same time, a command is received to start the diesel generator, which can be generated from the signals from the voltage sensors 4 and 5. Controlling a diesel generator is not part of the device function. The diesel generator starts up in 15-20 seconds. As soon as the output of the voltage sensor 6 of Vits logical I indicates that the diesel generator is ready to accept the load, the CB 8 is turned off and the CB 7 is turned on. The diesel generator will work until the voltage on PI 1 is restored. There is a qualitative voltage at IP 1, a logical 1 signal is generated at the output of voltage sensor 4, which can be used as a command to stop the diesel generator. As soon as a logical O is formed at the output of voltage sensor 6, the logical part of the device will generate control signals for switching off CB 7 and turning on CB 8.

The device works in the same way when the IP 2 fails and the IP 1 is operational. In the case where the diesel generator1 is started forcibly when the IPs I and 2 are working and start

0

deliver a quality voltage, as indicated by voltage sensor 6, a logic device generates control signals for switching off the ST 9 and turning on the ST 7. The PI 1 becomes a reserve. If the diesel generator fails, CB 7 is turned off and CB 9 is turned on.

When two IPs are inoperable, both SS are powered from the third IP through the corresponding CB. These modes of operation of the device occur when operating CB r 7-12. In the case of CB failures, the logical part of the device does not generate control signals to turn on the failed CBs, and the SS is connected to the PI via the corrected CBs.

The unit 21 for monitoring the performance of the CB (Fig. 2) is designed to determine the failure of the CB type break. The inputs of this block receive signals from 4-6 voltage sensors, elements

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Block 21 of the monitoring of the performance of CB contains six similar sub-blocks 27-32, controlling respectively CB 9, 8, 6, 10, 11 and 12.

Q Subblock 27 outputs a logical unit only in the event of a failure of CB 9, which occurs with the following signals at the inputs: at the first input of the N-33 element, logical 1 comes from the output of sensor 4 to

$ ys and indicates that the PI 1 is healthy, at the second input of the NAND element 33, logical 1 comes from the output of the AND 59 element of the blocking unit 23 and indicates that the CB 9 is turned on, while the output of the NAND 33 element of the logical O arrives at the first input of the element OR-NOT 34, at the second input of the element OR-NOT 34, a logical O comes from the output of the element OR 19, combining the signals from the voltage sensors 15 and 16 and indicating that the school 13 is de-energized; at the same time, the output of the OR-NOT 34 element is a logical 1, which is fed to the input of the delay line.

Line 35 delay (LZ) performs the following functions. If logical 1 appears at its input and 0 is stored

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It takes longer than 1 At.

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at the output of LZ through time & C

1, which will persist as long as the input LZ is 1.

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If at the entrance of LZ on Vits logical

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O will remain in time longer than the delay time to pass O fi.ta, then at the output of LZ through time fytz, O is set, with & t, bt.

After a delay time & t at the output of the LSA 35 in Wits 1m, which will enter the first input of the element OR 37, the output of which is connected via the disconnecting contact of the return button 36 to its second input. At the same time, the output of the element OR 37 is in turn I, which will also be held during the disappearance of 1 at the first input of the element OR 37; 1 at the output of the element OR 37 indicates the failure of CB9.

The CB control unit 22 is designed to generate control signals for switching on and off the CB 7-12 on the basis of signals from voltage sensors 4-6 and the CB control unit 21. Block

The control control unit 24, consisting of two identical sub-blocks 49 and 50, is designed to detect situations where the CB control unit 22 generates control signals on

22 control CB contains two analog-25 inclusion of several PIs on one SS. sub-blocks 38 and 39, which the sub-block 49 controls the control

Management is managed respectively CB 7-9 and CB 10-12. The operation of each sub-block is described with the help of a truth table (Fig. 3), where cases of different PI states are considered, except for the cases of failure of all three PIs and failure of two or more SV as low-probability events. The first digit in the designation of the inputs and outputs refers to subblock 38, and the second to subblock 39. In the table, the signals that go to the inputs and are generated by

the outputs of sub-block 38 have the following meanings.

CB 7-9, sub-block 50 controls the CB control 10-12. For example, at both inputs of the element 51, simultaneously 1 comes from the first and second outputs of subblock 38, which corresponds to the command to turn on CB 9 and CB 8, i.e. The connection of PI 1 and IP 2 at school 13. Then, at the output of element I 51, there appears 1, which signals the failure of subblock 38. The remaining elements of control unit 24 also work in a similar way.

The blocking block 23, consisting of

The first - the third inputs receive 40 two identical sub-blocks 54 and 55, the signals from the first to the third outputs perform the protection functions from the plug-in unit 21, and 1 indicates that there are several IPs. Sub-failure, respectively, CB 9, 8, 7, and block 54 implements a logical block 0 about the good condition of these CB; kirovka including several CB on

On the seventh - ninth entrances of the post-45 school 13, sub-block 55 blocks the inclusion

several CBs on the secondary school 14. Each subblock outputs 1 only on one emit signals from sensors 4-6 of voltage, and 1 indicates that there are several CBs on the secondary school 14. Each subblock produces 1 only on one output corresponding to the input to which | it

the voltage coming from the PI,

is within the permissible limits, and 1 arrives earlier than on the other O - that it has gone beyond the limits, set-50 two entrances When used at any updated state standard.

of the two other inputs, or both at once, the combination of signals at the outputs of the sub-block does not change. Suppose, the second input of the element And 59 arrived 1, at the inputs of the elements And 60 and 61 - O. From the outputs of the elements And 60 and 61 O comes to the second inputs of the elements OR-NOT 57 and 58 and to both inputs of the element OR-NOT 56, that leads to

On the first - the third exit. control signals are generated, respectively; for CB 9, 8, 7, 1 — the enable signal; CB; O — the enable signal is absent.

For subblock 39 of block 22, the input and output signals have a similar meaning.

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The signal to turn on CB 7 comes in the following cases (rows 1–8 of the table, FIG. 3): failure of IP 1 and IP 2;

failure of IP 1; all SP and CB are intact; failure of CB 8 and SP); refusal CB 8; failure of CB 9; failure of IP 2; failure of CB 9 and IP 2. The signal for switching on CB 8 comes in the following cases (lines 9-11): failure of IP 1 and IP 3; failure of CB 7 and IP 1; failure of CB 9 and IP 3. The signal for switching on CB 9 comes in the following cases (lines 12-16): failure of IP 2 and IP 3; failure of IP 3; failure of CB 9 and IP 3; failure of CB 7 and IP 2; CB fault 7. Signals for switching on all CBs are not signaled when CB 7 and IP 1 and 2 fail; failure CB 8 and SP 1, 3; failure of CB 9 and IP 2, 3.

The control control unit 24, consisting of two identical sub-blocks 49 and 50, is designed to detect situations where the CB control unit 22 generates control signals on

5 the inclusion of several IP on one school. Sub-block 49 controls the control

CB 7-9, sub-block 50 controls the CB control 10-12. For example, at both inputs of the element 51, simultaneously 1 comes from the first and second outputs of subblock 38, which corresponds to the command to turn on CB 9 and CB 8, i.e. The connection of PI 1 and IP 2 at school 13. Then, at the output of element I 51, there appears 1, which signals the failure of subblock 38. The remaining elements of control unit 24 also work in a similar way.

The blocking block 23, consisting of

School 13, subblock 55 blocks the inclusion

several CBs at the secondary school 14. Each subblock issues 1 only at one output, corresponding to the input to which | it

1 arrives earlier than the other two entrances.

1 arrives earlier than the other two entrances.

of the two other inputs, or both at once, the combination of signals at the outputs of the sub-block does not change. Suppose, the second input of the element And 59 arrived 1, at the inputs of the elements And 60 and 61 - O. From the outputs of the elements And 60 and 61 O comes to the second inputs of the elements OR-NOT 57 and 58 and to both inputs of the element OR-NOT 56, that leads to

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the output of which is connected to the input of the delay line of this subblock, the output of which is connected to the first input of the OR element of this subblock, the output of which is connected to the first output of the control unit of the power switches and through the opening contact of the return button to the second input of the OR element of this subblock, the first inputs of the second, the third, fourth, fifth, and sixth sub-blocks of the operability of power switches are connected respectively to the second, third, first, second, third house of this unit, the second inputs are second third, fourth, fifth and sixth sub-blocks of the operability control unit of power switches are connected respectively to the seventh, eighth, ninth, tenth, eleventh inputs of this block, the third entrances of the second and third sub-blocks of the operability control unit of power switches are connected to the fourth input of this block, the third inputs of the fourth, fifth, and sixth sub-blocks of the operability control unit of power switches are connected to the fifth input of this block, the outputs of the second, third, fourth, fifth and Of course, the sub-blocks of the power control unit of the power switches are connected to the same outputs of this block, the control unit of the power switches contains two similar sub-blocks, each of which contains two NO elements, two OR-NOT elements, two AND elements, three delay lines, and the first input of the first sub block of the control unit of power switches, which is the first input of this block, is connected to the first input of the first element OR153463612

unit, the fifth input of the first subblock of the control unit of power switches, which is the eighth input of this block, is connected to the first input of the second element AND of this subblock, the sixth input of the first subblock of the control unit of power switches, which is the ninth input of this block, is connected to non-inverted input of the first element NO of this sub-block, the output of which is connected to the second input of the first element OR-NOT of this sub-block, the second input of the second element OR-NOT of this sub-block and the input of the third delay line of this sub-block, out The first OR element of this subblock is connected to the second input of the first element AND of this subblock, the output of which is connected to the first input of the second element OR NOT of this subblock and the input of the first delay line of this subblock, the output of the second element OR NOT of this subblock is connected to the non-inverse the input of the second element is NO of this subblock, the output of which is connected to the second input of the second element And this, subblock, the output of which is connected to the input of the second delay line of this subblock, the outputs of the first, second and third delay lines of the first The sub block of the power switch control unit is the first, second and third outputs of this unit, the first, second, third, fourth, fifth and sixth inputs of the second sub block of the power switch control unit are connected to the fourth, sixth, fifth, seventh, respectively. , the ninth, eighth inputs of this block, the outputs of the first, second and third delay lines of the second sub-block of the control unit of the power switch are correspondingly 20

25

thirty

35

40

50

This subblock, the second input of the primary fourth, sixth and fifth subblock of the power switch control unit, which is the second input of this block, is connected to the inverse input of the second element NO of this subblock, the third input of the first subblock of the power switch control unit , Which is the third input of this block, is connected to the inverse input of the first element NO of this sub-block, the fourth input of the first sub-block of the control unit of power switches, which is the seventh input of this block, is connected to the first the entrance of the first element And this is under55

the outputs of this unit, the control unit contains six elements And, the first input of the first, second, third, fourth, fifth and sixth Elements And this unit is connected respectively to the first, first, third, fourth, fourth, sixth outputs of the power control unit switches, the second input of the first, second, third, fourth, fifth and sixth elements And this unit is connected respectively to the third, second, second, sixth, fifth, fifth inputs of the control unit power

fourth, sixth and fifth

the outputs of this block, the control unit contains six elements And, the first input of the first, second, third, fourth, fifth and sixth Elements And of this block is connected respectively to the first, first, third, fourth, fourth, sixth outputs of the power switch control unit The second input of the first, second, third, fourth, fifth and sixth elements AND of this unit is connected to the third, second, second, sixth, fifth, fifth inputs of the control unit for power output at the output of this element 1, respectively. ra arrives at the first input of the element AND 59, the output of which forms 1. From the output of the element, And 59 1 enters the first inputs of the elements OR-NOT 57 and 58, the outputs of which form O. From the output of the element OR-NOT 57 O enters the first the input of the element 60, where O is formed. From the output of the element OR NOT 58, O arrives at the first input of the element 61, at the output of which O is also formed.

no matter according to 1

the second inputs of elements And 60 and 61 or not, on their outputs will be O. The simultaneous appearance of logical 1 on two or three inputs of each blocking sub-block 23 is a small event.

Claims (1)

Formula of invention e and N A fast-acting automatic backup power-up device containing a busbar section connected to the first, second and third power sources via the first, second and third power switches respectively, the inputs of the first and second voltage sensors are respectively connected to the first and second power sources, which differ so that, in order to increase reliability, speed, as well as expand the functionality of the device, the second section of tires was additionally introduced into it, three power switches bodies, five voltage sensors, two OR elements, a switching relay unit, a control unit for the operation of power switches, a control unit for power switches, a control unit for control, a block and a signaling and indication unit, with the second busbar the first, second and third power sources, respectively, through the fourth, fifth and sixth power switches, the input of the third voltage sensor is connected to the third power source, the outputs of the first, second and third voltage sensors s respectively, to the first, second and third inputs efficiency control unit switches silo O, seventh, eighth and a ninth input power switch control unit E, four inputs 15 „ 25 30, from 0 45 50 five This and the fifth voltage sensors are connected to the first busbar section, and their outputs are respectively to the first and second inputs of the first OR element, the output of which is connected to the fourth input of the control unit of the power breakers, the sixth and seventh voltage sensors are connected to the second section tires, and their outputs, respectively, to the first and second inputs of the second element OR, the output of which is connected to the fifth input of the operability control unit of power switches, six outputs of which are connected to the same name The inputs of the alarm and indication unit and the control unit of power switches, the outputs of the control unit of power switches, are connected to the same inputs of the control control unit and the block, the outputs from the first to the sixth of which are connected to the sixth, seventh, eighth, ninth, ten the first, the eleventh inputs of the block, control of the operability of the circuit breakers and the inputs of the switching relay unit, with the same name with the outputs of the blocking block, the outputs from the first to the sixth block of switching relays, soy Ina with inputs of power switches from the first to the sixth, and the output of the control unit is connected to the seventh input of the signaling and indication unit, and the unit for monitoring the performance of power switches consists of six similar sub-blocks, each of which contains one AND-NES element, one OR- element NOT, delay line, return button, one OR element, and the first input of the first sub-block of the control unit of the operation of the power switches, which is the first input of this block, is connected to the first input of the element of this unit The second input of the first subblock of the operability control unit of the power switches, which is the sixth input of this block, is connected to the second input of the NAND element of this subblock, the output of which is connected to the first input of the OR element of this subblock, the third input of the first subblock of the health monitoring unit power switches, which is the fourth input of this block, is connected to the second input of the OR element NOT of this sub-block, 13 The switches, the outputs of all six elements AND of the control control unit are interconnected and are the output of the control control unit, and the blocking block consists of two similar sub-blocks, each of which contains three OR-NOT elements and three AND elements, the first, second and the third inputs of the first sub block of the block, which are respectively the first, second and third inputs of this block, are connected respectively to the first input of the first, second and third elements AND of the first sub block of this block, the output of the first element And the first subblock is a subblock of the first output and connected to the first input of the second and third OR-NO elements of this sub-block, the output of the second AND subblock is the second output of the first sub-unit and locking unit coupled to the first input c of first OR-NO ten 3463614 this sub-block and the second input of the third element W1I-NOT of this sub-block, the output of the third element I of the first sub-block is the third output of this sub-block and connected to the second input of the first and second elements of the OR-NO of this sub-block, the output of the first, second and third elements of OR-NO This sub-block is connected respectively to the second input of the first, second and third elements of AND of this sub-block, the first, second and third outputs of the first sub block of the blocking block are the first, second and third outputs of this block. swarm and third inputs of the second subblock lock blocks are respectively a fourth, fifth and sixth inputs of the block, and the first, second and third outputs of the second subblock lock blocks are respectively a fourth, fifth and sixth outputs of this block. 15 20 Fig.E