SU1304126A1 - Starting device for automatic switching-in of backup power supply to using equipment - Google Patents

Abstract

The invention relates to e. Engineering, in particular, to devices of irotia-emergency automation of power supply systems of industrial enterprises, and can be used as a high-speed device for their automatic or bluephase automatic switching of the reserve of the corresponding user ;. The purpose of the invention is to improve the speed and reliability of fixing the HOTeiVi | 1Titan: I and | 1 asphalt functions, 1-in:; Mono-1; stro | 1 stia. When power is lost, the engine starts. The military name Bxo.ie form H) cotton, 1 imi, 1c 8 is removed, and the pa of the output of the threshold argument i I is at c, «1. At the output of e, 1meite P.KHMYaT, 38 usal and 1 appears at the time of the flight. 1 time memory. VC. It is considered isiolian body 14, by the head of the ciirna, and by the openness of the introductory term. 11chat, 1. At the same time, the work of the second channel is blocked by applying the signal “O to the second input of element 37. As far as 1 runs out of the winding up on the B1) input of the iiopoi OBoro of the black signal. becomes "1. At the same time, Vk, IO-psio, 1inte, 1yy1 | opi-an 44, serving. 1 for the inclusion of e, 1emegga 4o acceleration of VC; nocturn secpioino1CH1 B1) H luchats, 1 3. 2, i.H. ((s, 1, 2 and. 1. S (L oo o 4 Yu Oi

Description

The invention relates to electrical engineering, in particular, to devices for emergency control of power supply systems of industrial enterprises, and can be used as a device for fast-acting or in-phase automatic switching of the reserve of responsible consumers.

15

The purpose of the invention is to increase the speed, reliability of fixing the power loss and expand the functional capabilities of the device.

FIG. Figure 1 shows a single-line diagram of a substation with switches, voltage and current transformers, and a block diagram of a starting device for automatically switching on a backup power supply for consumers; in fig. 2 shows an example of connecting a minimum voltage relay to voltage transformers and a current relay to current transformers.

The substation (Fig. 1) contains switches I and 2 operating inputs, a section switch 3, voltage transformers 4 and 5, current transformers 6 and 7.

The starting device for automatic switching on the backup power supply of the consumers contains the formers 8 and 9 of the pulse 25 of that 29 threshold elements, the outputs of the first

the moves of the first 30 and second 31 logic circuits 4 AND are connected to the second inputs of the first 40 and second 41 logical circuits 2 OR, respectively, the outputs of which are connected respectively to the inputs of the first 14 and second 15 executive bodies, the first and second inputs of the first logic circuit 4 AND 30 connected to the outputs of the first 24 and second 25 threshold elements, respectively, and the first and second inputs of the second logic circuit 4 And 31 to the outputs of the third 26 and fourth 27 threshold elements, the third inputs of the first 30 and second 31 logic circuits 4 And are connected to the outputs of the corresponding Actually, the first 32 and second 33 BANNER elements, the inputs of the latter are connected to the outputs of the second 25 and fourth 27 threshold elements, with the input of the first element BANNER 32 connected to the output of the fourth threshold element 27, and the input of the second threshold element 33 element 25, the fourth inputs of the first 30 and second 31 logic circuits 4 And are connected to the outputs of the third 34 and fourth 35 BANNERS, respectively, the inputs of the latter are connected respectively to the outputs of the first 28 and six and the second 37 logic circuits 2 And are connected respectively to inputs of the first 38 and second 39 memory elements, the outputs of which are respectively connected to first inputs of first 40 and second 41 logic

owls connected to the terminals of opposite phases of voltage transformers of the first and second sources, a driver 10 pulses connected to a terminal of the same phases of voltage transformers of the first and second sources, threshold elements 11-13, whose inputs are connected to the outputs of drivers 10-10 pulses respectively, the executive bodies 14 and 15, the outputs of which are connected to the actuator switches 1 and 2 working inputs, the bodies 16 and 17 of the lock; shapers 18-23 pulses; threshold elements 24-29, logical circuits 4 and 30 and 31, elements BAN 32-35, logical circuits 2 and 36 and 37, memory elements 38 and 39, logical circuits 2 OR 40-42, logical circuits 2 and 43, executive The body 44, the device 45 to accelerate the activation of the sectional switch, the cover 46 - the first 18 and the second 19 additional pulse shapers are connected respectively to the terminals of the first 47 / A1 /, second 48 / B1 / and third 49 / C1 / phases of the voltage transformer of the first transformer 4 the third, and the third 20 and fourth 21 additional ones - to the conclusions of the first 50 / .42 /, the second 51 / B2 / and retey 52 / C2 / phase voltage transformer of transformer 5 second voltage fifth additionally minutes i.mnulsov generator 22 is connected to a transformer 6, the first current source, and the sixth 23 - to transforma35

36 and second 37 logic circuits 2 And are connected to the inputs of the first 38 and second 39 memory elements, respectively, the outputs of which are connected respectively to the first inputs of the first 40 and second 41 logical

30 OR circuits 2, the first inputs of the first 36 and second 37 logic circuits 2 AND are connected to BE, the first 11 and second moves 12 threshold elements, the second inputs of the first 36 and second 37 logic circuits 2 AND, respectively, are connected to the outputs of the first 16 and the second 17 blocking bodies, the inputs of the latter are connected to the inputs of the executive bodies 14 and 15, with the input of the first block 16 of the block connected to the input of the second actuator, and the input of the second block 1 7 to the input of the first actuator 14, inputs of the logic circuit 2 OR 42 connected to the output s first 14 and second 15 actuators bodies, and an output - to a second input of the third AND gate 43 2, the first input of which is connected to the output

45 of the third threshold element 13, the output of the third logic circuit 2 AND 43 is connected to the input of the third executive body 44, and the output of the latter is connected to the input of the acceleration device of the sectional switch 45 built into the drive of this switch.

40

50

The device for accelerating the activation of the sectional switch 45 is made in the form of an energy storage device and an induction-dynamic system coil. Executive

To the torus 7 of the current of the second source, the outputs of the form-55 organs are made in the form of optocouplers, secondary pulse emitters 18-23 of pulses are connected with co-circuits of which are connected directly to the inputs of six additionally to the circuit of electromagnets of switching off

input thresholds 24-29, you-switches 1 and 2 working inputs and

five

0

5 addition 29 threshold elements, the outputs of the first

the moves of the first 30 and second 31 logic circuits 4 AND are connected to the second inputs of the first 40 and second 41 logical circuits 2 OR, respectively, the outputs of which are connected respectively to the inputs of the first 14 and second 15 executive bodies, the first and second inputs of the first logic circuit 4 AND 30 connected to the outputs of the first 24 and second 25 threshold elements, respectively, and the first and second inputs of the second logic circuit 4 And 31 to the outputs of the third 26 and fourth 27 threshold elements, the third inputs of the first 30 and second 31 logic circuits 4 And are connected to the outputs of the corresponding Actually, the first 32 and second 33 BANNER elements, the inputs of the latter are connected to the outputs of the second 25 and fourth 27 threshold elements, with the input of the first element BANNING 32 connected to the output of the fourth threshold element 27, and the input of the second element BANNING 33 to the output of the second threshold element 25, the fourth inputs of the first 30 and second 31 logic circuits 4 And are connected to the outputs of the third 34 and the fourth 35 BANKS, respectively, the inputs of the latter are connected respectively to the outputs of the first 28 and sixth 29 threshold elements, the outputs of the first th

36 and second 37 logic circuits 2 And are connected to the inputs of the first 38 and second 39 memory elements, respectively, the outputs of which are connected respectively to the first inputs of the first 40 and second 41 logical

2 OR circuits, the first inputs of the first 36 and second 37 logic circuits 2 AND are connected to BE, the first 11 and second moves are 12 threshold elements, the second inputs of the first 36 and second 37 logical circuits 2 AND are connected: to the outputs of the first 16 and the second 17 blocking bodies, the inputs of the latter are connected to the inputs of the executive bodies 14 and 15, with the input of the first block 16 of the block connected to the input of the second actuator, and the input of the second block 1 7 to the input of the first executive body 14, the inputs of the logic circuit 2 OR 42 connected to the output first 14 and second 15 executive bodies, and the output with the second input of the third logic circuit 2 AND 43, the first input of which is connected to the output

The third threshold element 13, the output of the third logic circuit 2 And 43 is connected to the input of the third executive body 44, and the output of the latter is connected to the input of the acceleration device of the sectional switch 45, built into the drive of this switch.

The device for accelerating the activation of the sectional switch 45 is made in the form of an energy storage device and an induction-dynamic system coil. Executive

control circuit of the energy storage device of the acceleration device of the sectional switch 3.

FIG. Figure 2 shows an example of connecting a minimum voltage relay to voltage transformers 4 and 5 and current relays to current transformers 6 and 7 used as pulse shapers and threshold elements: relay 53. voltage instead of 18 and 24; relay 54 voltage instead of 19 and 25; relay voltage 55 instead of u

20 and 26; rec. 56 voltage instead

21 and 27; relay 57 current instead of 22, 28 and 34 and relay 58 current instead of 23, 29 and 35.

The starting device for the automatic activation of the backup power supply of the consumers operates as follows.

In normal mode, the consumers of each substation section are powered from their own source, while the inputs of elements 8 and 9 are applied to a linear voltage of 100 V. Elements 11 and 12 are in the actuated state, and at their outputs, signals "O." Therefore, at the outputs of elements 36, 38 and 37, 39 and, therefore, at the first inputs of elements 40 and 41, the signals “O. Voltage relays 53-56 are in the de-energized state, and at the first and second 25 inputs of elements 30 and 31 are signals "O, at the third and fourth inputs of elements 30 and 31 in normal mode are signals" 1 and "3, the inputs of elements 30 and 31 - signal15

cash “1. At that, the organ 14 is turned on, signaling the input switch of the 1st stage; The switch 1 is turned off and the blocking of the second channel of the device "O" to the second input of the element blocking element 17 is carried out. With selectors, the voltage at the input of the el increases, and when it reaches 50V, the signal at the output of the element Wits "O, and this happens when the executive body 1 continues to run out, the voltage of the element 10 decreases, and when Wits is below 50 V. one. At this moment, in the second input of the element 43, the signal "1, therefore at the occurrence of" 1 and at the first input, the output of the element 43 also appears at the output of the actuator. A signal for the activation of the sectional switching section 3; a common-mode on / off switch 3 occurs.

If it is permissible to turn on a section on a working device in a back-off device, it is impos- sible to impose a high-speed turn-on of a backup fi

ly "Oh, at the outputs of the elements 40, 41 - also

p ,,, /, with two-section voltage spanners.

"ABOUT. The executive bodies 14 and 15 are disconnected, at their outputs there are signals “O, at the outputs of elements 16 and 17 there are signals“ 1, at both inputs and at the output of element 42 there are signals “O. A voltage not exceeding 10-15 V is applied to the input element 10, while the element 13 is in an unheated state and the signal "1" is present at its output. Thus, at the first input of element 43 - the signal “1, and at the second -“ O. At the same time at the output of the element 43 there is a signal "On, the executive body 44 is turned off, at the input of the element 45 -" Oh, the switch 3 is turned off.

35

In the event of a short circuit, on the power supply circuit of section 1, from reducing the yarn to 0.2 units and below, the unit returns 53 (18.24) and 54 (19.25). H at the input of elements 8 and 9 at the level of the phase (58V) and setpoint (50V), therefore, at the outputs 11 and 12 there are signals returning the relay 53 and 54 at the first inputs of the element 30 appear sy 40 Because the voltage on II section, at the input of element 32, the presence of “1. The signal at the output of the e is also "1, since the relay 57 is in an unworked state, since the current transformer 6 does not

When power is lost, for example, substation section I, due to an erroneous or inadvertent disconnection of input switches, when a short circuit occurs, for example, in the power supply circuit of section 1 with voltage decreasing to 0.2 i.yum and lower, the voltage relay 53 returns to the starting device ( 18.24) and 54 (19.25). The voltage at the input of the elements 8 and 9 is at the level of the phase (58V) and exceeds the set point (50V), therefore, at the output of the elements 11 and 12 there are signals "O. When relays 53 and 54 return, the signals "b" appear on the first and second inputs of element 30. 40 Since the voltage on section II is normal, the signal "1." Is present at the input of element 32. The signal at the output of element 34 is also ' 1, since the relay 57 is in an inoperative state, because the short-circuit current does not pass through the current transformer 6.

In this way, the signals "1." are present at all inputs and, therefore, at the output of element 30. At the output of the element 40, the signal "1" also appears, which causes the actuator 14 to operate and the input switch 1 of the first section is turned off. After switching off the switch 1, the engines of the first section run out, which leads to the inclusion of the section switch as in the previous case.

of chronical and asynchronous motors connected to section I. As the motors run down, the voltage at the input of element 8 is removed, and when the setpoint is 50B, the output of element 11 is "1, and at the output of element 16, also" 1, since the input of the executive body 15 signal "O. Thus, at both inputs of the element 36 there are signals “1, therefore, the output is also“ 1. At the output of element 38, the signal "1 appears for the time determined by the memory time of element 38 (0.8-1s). Signal output also appears at the output of element 40.

five

cash “1. When this is done, execute the lion body 14, giving a signal to turn off the input switch 1 of the first section; switch 1 is turned off. At the same time, the operation of the second channel of the device is blocked by applying the signal "O to the second input of the element 37 through the blocking element 17". When the motors run, the voltage at the input of element 10 increases, and when the setpoint 50B is reached, the signal at the output of element 13 becomes "O, and this happens before the actuator 14 trips. As the further run, the voltage at the input of element 10 decreases, and when it becomes below 50V, "1." appears at the output of element 13. At this point in time, the signal "1" is present at the second input of the element 43, therefore, when the signal appears "1" and at the first input, a signal appears and at the output of the element 43. At that, the actuator 44 turns on, giving a signal to activate the activation element 45 section switch 3; the common-mode inclusion of the sectional switch 3 occurs.

With the admissibility of switching on the emergency section to the working one in antiphase in the starter, applying the overlay 46, it is possible to carry out a fast-acting automatic switching on of the backup power without waiting for the in-phase time between

In the event of a short circuit, for example, in the power supply circuit of section 1 with a voltage decrease to 0.2 i.um or lower, the voltage relay 53 (18.24) and 54 (19.25) return to the starting device. The voltage at the input of the elements 8 and 9 is at the level of the phase (58V) and exceeds the set point (50V), therefore, at the output of the elements 11 and 12 there are signals "O. When relays 53 and 54 return, the signals "b" appear on the first and second inputs of element 30. Since the voltage on section II is normal, the signal "1." Is present at the input of element 32. The signal at the output of element 34 is also ' 1, since the relay 57 is in an inoperative state, because the short-circuit current does not pass through the current transformer 6.

- Thus, at all entrances and, trace0

five

Of course, the output of element 30 contains signals “1. At the output of the element 40, the signal "1" also appears, which causes the actuator 14 to operate and the input switch 1 of the first section is turned off. After switching off the switch 1, the engines of the first section run out, which leads to the inclusion of the section switch as in the previous case.

Claims (3)

1. Starting device for automatic activation of backup power supply to consumers. containing pulse formers, threshold elements, actuators, blocking organs, with two pulse drivers being connected to the terminals of the opposite phases of voltage transformers of the first and second sources, the first pulse driver connected to the second phase of the voltage transformer of the first source second wife The inputs of the first and second logic circuits 4 And are connected to the outputs of the first and second BREAD elements, respectively, the inputs of the latter are connected to the outputs of the second and fourth additional threshold elements, and the input of the first BAR element is connected to the output of the fourth additional threshold element, and the output of the second element BAN - to the output of the second additional threshold element source, and the second pulse shaper, the fourth inputs of the first and second logic to the first phase of the voltage transformer of the first source nick and the second phase of the second transformer a voltage source, a third pulse shaper connected to the terminals of like phase voltage transformers of the first and second rows 15, first and second logic AND circuits 2 soe- sources, wherein each rioporoBorodineny input to inputs of the first and The 4 AND circuits are connected to the outputs of the third and fourth BANKS, respectively, the inputs of the latter are connected respectively to the outputs of the fifth and sixth additional threshold elements, the output element is connected to the output of the corresponding pulse generator, the outputs of the executive bodies are connected to the actuator of the operating inputs switches, characterized in that , in order to increase speed, reliability of fixing the power loss and functionality enhancement, an additional six formers are introduced into it her pulses are six to 20 The second memory elements, the outputs of which are connected respectively to the first inputs of the first and second logic circuits 2 OR, the first inputs of the first and second logic circuits 2 AND are connected to the outputs of the first and second threshold elements respectively, and the second inputs of the first and second logic circuits 2 AND are connected with exits respectively of the first and second organs horny elements, two blocking logic 25, the inputs of the latter are connected 4 AND, four BANKS, three logical circuits 2 OR, three logical circuits 2 AND, two memory elements, an overlay, a third actuator and a unit for accelerating the on-switch of the sectional switch. to the inputs of the executive bodies, with the input of the first blocking body connected to the input of the second executive body, and the input of the second blocking body - to the input of the first executive body, the inputs the first and second additional 30 third logic circuits OR, the pulse converters are connected respectively to the terminals of the first and second, second and third phases of the voltage transformer of the first source, and the third and fourth are connected to the terminals with the outputs of the first and second executive bodies, and the output with the second input of the third logic circuit 2 And, the first input of which is connected to the third threshold element, the output of the third log-first and second, second and third phases of the 35th circuit 2 And connected to the input of the third voltage transformer of the second source of the executive organ, and the output of the last fifth additional form with its output of the acceleration unit, the pulse switch is connected to the current transformer of the first source, and the sixth additional to the transformer then ka second source, the outputs of the pulse shapers are connected to the inputs of six additional threshold elements, with the output of each pulse shaper connected to the input of the corresponding threshold element, the outputs of the first and second logic circuits 4 And connected to the second inputs of the first and second logic 2 OR, respectively, the outputs of which connected respectively to the inputs of the first and second executive bodies, per40 45 section switch, and the overlay is connected between the output of logic circuit 2 OR and the input of the third executive body. 2. A device according to claim 1, characterized in that the device for accelerating the activation of a sectional switch is made in the form of an energy storage device and an induction-dynamic system coil. 3. The device according to claim 1. characterized in that the executive bodies are made in the form of optocouplers, the primary circuits of which are connected to the terminals of the first and second and second inputs of the first logic circuit 50 of the OR 2 logic circuits and to the output we 4 AND are connected to the outputs of the first and second additional threshold elements, respectively, and the first and second inputs of the second logic circuit 4 AND to the outputs of the third and fourth additional threshold elements, respectively; 55 the third logic circuit 2 And, and the secondary circuits are connected to the circuit of electromagnets for switching off the breakers of working inputs and to the control circuit of the energy storage device of the acceleration device VC. 1 section switch. The inputs of the first and second logic circuits 4 And are connected to the outputs of the first and second BREAD elements, respectively, the inputs of the latter are connected to the outputs of the second and fourth additional threshold elements, and the input of the first BAR element is connected to the output of the fourth additional threshold element, and the output of the second element BAN - to the output of the second additional threshold element, the fourth inputs of the first and second logic of the first and second logic circuits 2 And connected to the inputs of the first and second  one, the fourth inputs of the first and second logic of the first and second logic circuits 2 And are connected to the inputs of the first and second, respectively 4 AND circuits are connected to the outputs of the third and fourth BANKS respectively, the inputs of the latter are connected respectively to the outputs of the fifth and sixth additional threshold elements, output The second memory elements, the outputs of which are connected respectively to the first inputs of the first and second logic circuits 2 OR, the first inputs of the first and second logic circuits 2 AND are connected to the outputs of the first and second threshold elements respectively, and the second inputs of the first and second logic circuits 2 AND are connected with exits respectively of the first and second organs to the inputs of the executive bodies, with the input of the first blocking body connected to the input of the second executive body, and the input of the second blocking body - to the input of the first executive body, the inputs with the outputs of the first and second executive bodies, and the output with the second input of the third logic circuit 2 And, the first input of which is connected to the third threshold element, the output of the third log section switch, and the overlay is connected between the output of logic circuit 2 OR and the input of the third executive body. 2. A device according to claim 1, characterized in that the device for accelerating the activation of a sectional switch is made in the form of an energy storage device and an induction-dynamic system coil. 3. The device according to claim 1. characterized in that the executive bodies are made in the form of optocouplers, the primary circuits of which are connected to the terminals of the first and second logic circuits 2 OR and to the terminal 55 the third logic circuit 2 And, and the secondary circuits are connected to the circuit of electromagnets for switching off the breakers of working inputs and to the control circuit of the energy storage device of the acceleration device VC. 1 section switch. ) .AT 7 ( J cpus.2