SU892359A1 - Device for signalling short circuit direction in power transmission line - Google Patents

Description

Since it is not possible to visually monitor the operability of the return circuits for the ignition of the thyratron in the UMCC, as is the case in the ACW, a control button is inserted that causes the device to artificially activate and then return to the initial state,

However, it is not possible to verify the operability of the device operation circuits at the installed minimum short-circuit current.

The severe atmospheric conditions of operation of the topographic directional signs of the cs, as well as the small frequency of their use, impose heavy requirements on their reliability and simplicity of control.

The purpose of the invention is to ensure the control of the health of all the elements of the device during operation.

The goal is achieved by the fact that a device containing an inductive current transducer, the winding of which is connected through the first rectifier and the transient component of the short circuit current to the control input of the thyristor, the second rectifier to the input of which the antenna voltage converter is connected, and to the output - two capacitors connected in series, with the first resistor connected in parallel with the first capacitor, the return power winding is connected to the floor of the second pole of the rectifier a memory magnet connected via a threshold element to the connection point of said capacitors, to which one output of the control button is also connected; the negative pole of the second rectifier is connected to the thyristor cathode, the anode of which is connected to the positive pole of the second rectifier through the response winding of the magnetic memory unit; it is equipped with a second induction sensor winding: a current, one end of which is connected to the negative pole of the second rectifier, and the second to another pin of the said control button, and a second resistor connected in parallel with the second capacitor.

The drawing shows the proposed device.

Between the wires of the power line 1 an inductive current sensor 2 is placed, to the first winding 3 of which is connected through the first rectifier 4 and the block 5 for extracting the transient component of the short circuit current of the control input of the thyristor b. The output of the antenna voltage converter 7 is connected to the second rectifier 8, to the output of which are connected capacitors connected Y and Y. In parallel with the capacitors 9 and 10, resistors 11 and 12 are connected, respectively. The return winding 13 of block 14 of magnetic memory , The second end of which is connected via a threshold element 15 to the connection point of capacitors 9 and 10, as well as the operation coil 16 of the magnetic memory unit 14, BTOpoJi the end of which through the thyristor 6 is connected to the negative the second pole of the second rectifier. The second winding 17 of the induction current transducer 2 is connected via the control button 18; to the capacitor 10 .;

i Device) works as follows.

When the line is put into operation, the voltage on the antenna converter 7 induces a signal that charges capacitors 9 and 10 through the second rectifier 8. Condenser 9 has a capacity 5-10 times smaller than capacitor 10, therefore it charges faster. Upon reaching the threshold voltage on the capacitor 9, the threshold element 15 is unlocked and the capacitor 9 is discharged through the return winding 13 of the magnetic memory unit 14, and then starts charging again. As a threshold element, a tiratron or dinistr can be used. As the capacitor 10 charges, the charge current decreases and the charge time of the capacitor 9 increases. After the capacitor 10 is fully charged, the voltage on the capacitor 9 can no longer exceed the threshold value.

Thus, the threshold element passes only a few pulses and stops its work.

When k, h. in the controlled: direction of line 1, the signal on the first winding 3 of converter 2 is dramatically increasing through the first rectifier 4 and the block 5 for the selection of the transient component of the short-circuit current. arrives at the control input of the thyristor 6. The latter is unlocked and the capacitors 9 and 10 are discharged to the actuation winding 16. The block of the magnetic switch goes into a state of short circuit.

When the line is turned on after the removal of a fault or after a successful reclosure, a voltage appears at the output of the antenna voltage converter and the capacitors are charged and a few pulses pass through the return coil, which bring the magnetic memory unit 14 to the normal state. Job .

In order to ensure the possibility of checking the operability of the device during operation, a second winding of the induction current sensor 17 is introduced. When you press a button

Claims (1)

Claim Device for signaling the direction of a short circuit to. overhead power line containing an induction current transformer, the winding of which is connected through the first rectifier and the unit is selected to the negative pole of the second rectifier, and the second to the other terminal of the control button, and the second resistor connected in parallel with the second capacitor.