SU526982A1 - Device for automatic voltage regulation on substation tires - Google Patents

Description

the output of another logic element "The ban is connected to the input" Less than the drive of the second leading transformer, the input "More than which is connected to the output of another logic element" I.

The drawing shows a block diagram of a device for automatic regulation on substation buses.

The device contains a lead transformer 1 when switching to the "More" side, a lead transformer 2 when switching to the "Less" side, driven transformers 3, 4 and 5, the position sensor 6 of the load control device (RPN) of the leads, its transformer 1, The position sensor 7 of the on-load tap-changer Vedush, its transformer 2, the position sensors of the on-load tap-changers 8, 9, 10, respectively, of the slave transformers 3, 4 and 5.

The output of each position sensor 6-10 is connected to the measuring inputs of a pair of error control units I -15. At the same time, sensors 7 and 6 are connected to block 11, sensors 6 and B are connected to block 12, sensors 8 and 9 are connected to block 13, sensors 9 and 10 are connected to block 14, and sensors 10 and 7 are to block 15.

The automatic voltage regulator 16 with its measuring input is connected to the voltage transformer of the tires 17, according to the voltage of which the transformers 1-5 are controlled.

The output “More controller 16 is connected to the input of the“ Barring 18 ”logic element and to one of the two inputs of each“ AND 19-22 ”logic element. The output “Less than the regulator 16 is connected to the input of a logic element of the type“ Ban 23 ”and to one of the two inputs of each logic element of the type“ AND 24-27.

The output of block 11 is connected to the control input of logic elements of the type "Ban 18 and 23, and the outputs of blocks 12-15 are connected to the second inputs of the corresponding logic elements of the output of block 12 to the input of blocks 24 and 19, the output of block 13 to the input of blocks 25 and 20, the output of block 14 to the input of blocks 26 and 21, the output of block 15 to the input of blocks 27 and 22.

The output of the logical element of the type "Ban 18 is connected to the input" More drive 28 of the leading transformer 1, the output of the logical element of the type "Ban 23 is connected to the input" Less than the drive 29 of the leading transformer 2. To the input "Less than drive 28, the output of the logic element" And 24 , to the input "More drive 29 connected to the output of the logical element type" AND 22. The output of the logical element type "And 19 (20, 21) is connected to the input" More drive 30 (31, 32) of the slave transformer 3 (4, 5), and the output of the logic element 25 (20, 27) is connected to the input “Less than the drive 30 (31, 32).

In the initial state, transformers 1-5 have equal transformation ratios corresponding, for example, to position V

RPN devices. In this case, the error control units AND -15 are in a de-energized state — there is no corresponding signal at the output of each block 11-15.

The signal from the output of "More controller 16 can only be fed to the input" More of the drive 28 of the leading transformer 1, since the control input of the "Bar 18" logic element has no control (inhibit) signal from block 11 and cannot be sent to input “More than any drive 29-32, since at one of the two inputs of each logic element of the type

“And 22, 19, 20, 21 there is no signal from the respective blocks 12, 13, 14, 15.

The signal from the output "Less than the regulator 16 can only be fed to the input" Less than the drive 29 of the lead transformer 2, so

as in the control input of the logic element of the type "Ban 23, there is no control (inhibit) signal from block 11, and it can not be fed to the input" Less than any drive 28, 30, 31, 32, since one of

two inputs of each logical element of the type “And 24-27 there is no signal from the corresponding blocks 12, 13, 14 and 15.

Thus, in the absence of a mismatch, the effect of the regulator 10 may result

to switching of the leading transformers (transformer 1 to the side “More or transformer 2 to the side“ Less ”).

When the voltage on tires 17 deviates relative to the settings of the regulator 16, for example, the regulator 16 is triggered in the direction of undervoltage and from its output “More to input” More drive 28 sends a signal that switches the transformer 1 to “More” (towards reducing the voltage deviation of tires 17). After switching the transformer I towards "More, when its on-load tap-changer occupies position VI, a mismatch of the transformation ratios of the corresponding transformer pair, 1, 2 and 1, 3 occurs, and the error control blocks 11 and 12 are triggered.

The signal from the output of block 11 is fed to the control input of each logic element of the type "Ban 18 and 23, which will trigger and disconnect the input" More drive 28 and input "Less drive 29 from the corresponding outputs of the controller 16, the signal from the output of block 12 is fed to one of two logical inputs

elements of type “And 24, 19, creating a condition

impact on transformer switching

1 towards "Less and transformer 3 in

side "More.

If, as a result of switching transformer 1 by one step, the voltage on busbars 17 is not restored to the preset settings of controller 16, then under the action of the repeated signal "More controller 16 will switch transformer 3 to" More, and

its on-load tap-changer will take position VI.