Device for automatic tuning of adjustable-gap arc-control reactor correction

IPC classes for russian patent Device for automatic tuning of adjustable-gap arc-control reactor correction (RU 2266600):

H02J3/18 - Arrangements for adjusting, eliminating, or compensating reactive power in networks (for adjustment of voltage H02J0003120000; use of Petersen coils H02H0009080000)

H02H9/08 - Limitation or suppression of earth fault currents, e.g. Petersen coil

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FIELD: power engineering; automatic tuning of capacitive current correction in network incorporating plunger-type arc-control reactor.

SUBSTANCE: proposed device for automatic tuning of adjustable-gap arc-control reactor correction has motor control unit connected to correction maladjustment recording unit and to control input of mentioned arc-control reactor provided with motor for air gap adjustment. Motor control unit has first contactor control unit connected through first auxiliary contact to correction maladjustment recording unit, second contactor control coil connected through second auxiliary contact to correction maladjustment recording unit, and third contactor control coil. First and second power contacts are connected to control input of adjustable-gap arc-control reactor; third and fourth auxiliary contacts are connected to short-pulse shaper. Final relay is connected to short-pulse shaper and its contact is inserted in third control coil of contactor. Fifth and sixth auxiliary contacts are connected in series with first contactor control coil and with second contactor control coil, respectively. Motor control unit also has rectifier bridge connected through limiting resistor and third power contact to control input of mentioned reactor incorporating air gap adjusting motor.

EFFECT: enhanced precision of reactor tuning in resonance with network capacitance.

1 cl, 2 dwg

The invention relates to power engineering and can be used to automatically adjust the compensation of the capacitive currents in networks with arc reactor plunger type.

A device for automatic tuning arc reactor with an adjustable air gap [A.S. USSR №860208 (additional to the author's certificate No. 752613), IPC H 02 J 3/18, IB No. 32, 1981], which contains the arc reactor with an adjustable air gap and the engine to control the gap, connected to the network via the connecting transformer, input filter, whose input is designed for connection to a voltage arc-reactor with an adjustable air gap, and exit through a controlled relaxation oscillator and trigger with a counting input is connected with the control unit of the mechanism of change of the air gap, the block averaging of the test signal, included between the output of the trigger with a counter input and the input of the control unit of the mechanism of change of the air gap, the mechanism changes the air gap, the throttle, the working winding of which is connected in series with the arc reactor with an adjustable air gap, and a bias winding is connected to the trigger output from the counter input, the detection unit of the variable component of the signal, an input connected to the output of the input filter is, block reverse mechanism changes the air gap, the first input connected to the control unit of the mechanism of change of the air gap, the second input mechanically coupled to the output mechanism changes the air gap and the output to the input of the mechanism of change of the air gap.

In this device, the mechanical inertia of the engine makes it difficult to configure arc reactor.

Also known device for automatic tuning arc reactor with an adjustable air gap [A.S. USSR №936205 (additional to the author's certificate No. 752613), IPC N 02 N 9/08, BI No. 22, 1982], which contains the arc reactor with an adjustable air gap and the engine to control the gap, connected to the network via the connecting transformer, connected in series input filter connected to the neutral voltage, a relaxation oscillator, a trigger block averaging of the test signal and the power control mechanism changes the air gap, the output of which is included on the control input mechanism changes the air gap arc reactor with adjustable air gap, and the power supply trigger, the unit of comparison, the first input of which is connected to the output of the input filter and the second to the output of the power supply trigger, the output of the Comparer is connected with pataudi the input trigger choke, the working winding of which is connected in series in a circuit arc reactor with an adjustable air gap, and the control winding is connected to the trigger output.

The disadvantage of this device is the difficulty settings arc reactor with an adjustable air gap in resonance with the network capacity due to the mechanical inertia of the engine, which limits the possibilities of this device.

A device for automatic adjustment of compensation of the capacitive current earth fault [A.S. USSR №1288817, IPC 4 H 02 J 3/18, BI No. 5, 1987], selected as a prototype, containing arc reactor with an adjustable air gap and the engine to control the gap, connected to the network via the connecting transformer, relay, responsive to the zero-sequence voltage, plugged in, and connected with the control input of the arc reactor with an adjustable air gap and the motor to adjust clearance.

The disadvantage of this device lies in the difficulty settings arc reactor with an adjustable air gap in resonance with the network capacity due to the mechanical inertia of the engine, which due to coasting of the engine may cause the values of detuning compensation outside the dead-band IR autocleaner in the regulatory system. This makes fine tuning arc reactor in resonance with the network capacity.

The objective of the invention is to improve the accuracy settings arc reactor with an adjustable air gap in resonance with the network capacity.

The solution of this problem is achieved in that in the device to automatically adjust the compensation of the capacitive current earth fault containing arc reactor with an adjustable air gap and the engine to control the gap, connected to the network by connecting the transformer, the unit fixing the appearance of detuning compensation, the inlet of which is connected to the network, according to the invention additionally introduced the engine control unit, the first and second inputs which are connected respectively to the first and second outputs of the unit fixing the appearance of detuning compensation, and the output connected with the control input of the arc reactor with an adjustable air gap and the motor to adjust clearance. The engine control unit contains the first contactor contactor connected through the first auxiliary contact block fixation appears detuning compensation, the second contactor contactor connected via a second auxiliary contact block fixation appears detuning compensation, and the third coil control the population of the contactor. The first and second power contacts are connected to the control input of the arc reactor with an adjustable air gap, and the third and fourth auxiliary contacts connected to the shaper short pulses, thus actuating relay connected to the shaper short pulses, and his contact in the circuit of the third coil of the contactor. The fifth and sixth auxiliary contacts connected in series respectively with the first contactor contactor and the second contactor contactor. The engine control unit also contains a rectifier bridge, which through limiting resistor and the third power contact connected to the control input of the arc reactor with an adjustable air gap and the motor to adjust clearance.

Precisely stated, the device improves the accuracy settings arc reactor with an adjustable air gap in resonance with the network capacity due to the introduction of the engine control unit. When the value of detuning compensation beyond the dead zone, in block fixation detuning compensation signal is formed at the start of the engine, change the value of the air gap in the arc reactor with an adjustable air gap and thereby regulating its inductance. And when the ity arc reactor will be tuned in resonance with the network capacity with a given accuracy, through the rectifier bridge on the control input arc reactor with an adjustable air gap and the motor to adjust clearance after disabling the first coil of the contactor and the second coil of the contactor is a short pulse of DC. As a result, the rotor of the motor almost instantly stops, thereby eliminating the possibility of running out of the engine and performed the task of invention.

The proposed device is compared with a known prototype allows you to set up arc reactor with an adjustable air gap in resonance with the network capacity with greater accuracy. This is achieved through a quick stop of the engine by using electrodynamic braking, which consists in applying a short pulse of direct current after switching off the engine.

Figure 1 presents a diagram of the device for automatic adjustment of compensation arc reactor with an adjustable air gap; figure 2 - diagram of the engine control unit.

The device (1) contains the arc reactor with an adjustable air gap 1 and the motor to adjust clearance 2 connected to the network 3 with a total capacity of 4 through connecting the transformer 5, the fixing unit appears detuning compensation 6 connected to the network 3, the control unit d is a " 7, the inlet of which is connected to the outputs of the unit fixing the appearance of detuning compensation 6, and the output connected with the control input of the arc reactor with an adjustable air gap 1 and the motor to adjust clearance 2.

The engine control unit 7 (figure 2) contains the first contactor contactor 8, is connected through the first auxiliary contact 9 to the first output (-) unit fixing the appearance of detuning compensation 6, the second contactor contactor 10, is connected via a second auxiliary contact 11 to the second output (+) block fixation appears detuning compensation 6, and the third contactor contactor 12. The first power contact 13 and the second power contact 14 is connected to the control input of the arc reactor with an adjustable air gap 1 and the motor for adjustment of the gap 2, and auxiliary contacts 15 and 16 are connected to the shaper short pulses 17, thus actuating relay 18 is connected to the shaper short pulses 17 and its contact 19 in the circuit of the third coil of the contactor 12. Auxiliary contacts 20 and 21 are connected in series respectively with the first contactor contactor 8 and the second contactor contactor 10. The engine control unit 7 also includes a rectifier bridge 22 is connected through ogran is to provide a resistor 23 and a third power contact 24 to the control input of the arc reactor with an adjustable air gap 1 and the motor to adjust clearance 2.

As the source AC voltage is used alternating voltage auxiliary network 25.

As a first, second and third coils control contactors 8, 10, 12 can be used a magnetic starter type PM-12.

As the Executive relay 18 can be used relays type C.

Shaper short pulses 17 may include a transistor type CT, condenser C-17, the resistor C2-23-2.

Unit fixing the appearance of detuning compensation 6 may consist of a relay, responsive to the zero-sequence voltage, or to be performed in accordance with [RF Patent №2180462, IPC 7 H 02 H 9/08. Device for measuring the detuning compensation capacitive current earth fault / Rauenstein, Clarissimi, Khisamutdinov, Tav. Appl. 20.04.2000; Publ. 10.03.2002; Priority 20.04.2000].

Rectifier bridge 22 can be performed on diodes D242.

The device operates as follows. If the network is overcompensation or neocomposite, and the value of detuning compensation is outside the set dead zone (for example, ±5%), in block fixation appears detuning compensation 6 is formed by a signal supplied through output (-) when overcompensation or (+) if neocomposite to the engine control unit 7. In the result, when the switch is in anscii open the second and third auxiliary contacts 11, 15 and closes the first power contact 13, and if neocomposite open the first and fourth auxiliary contacts 9, 16 and closes the second power contact 14. You then run the engine for regulating the gap 2. When the inductance arc reactor with an adjustable air gap 1 will be tuned into resonance with a total capacity of 4 network 3 with a given accuracy, that is, the value of the detuning compensation will be within a predetermined dead zone, the second and third auxiliary contacts 11, 15 and the first power pin 13 or the first and fourth auxiliary contacts 9, 16 and the second power contact 14 is returned to its original position and from the output of the shaper short pulses 17 served a short pulse for actuating the relay 18, and the contact 19 of the actuating relay 18 supplies a third contactor contactor 12, resulting in the current path of the fifth and the sixth auxiliary contacts 20, 21 and closes the third power contact 24. Next to the motor to regulate the gap 2 through the rectifier bridge 22 and the limiting resistor 23 is supplied a constant current for a time equal to the duration of the short pulse generated by the shaper short pulses 17, causing the rotor to regulate the gap 2 almost instantly stops.

P is pout and second auxiliary contacts 9, 11 is enabled in this way to prevent simultaneous operation during disturbances in the operation of the device, causing a short circuit and malfunction of the device.

Device for automatic adjustment of compensation arc reactor with an adjustable air gap containing the arc reactor with an adjustable air gap and the engine to control the gap, connected to the network by connecting the transformer, the unit fixing the appearance of detuning compensation, connected to a network, characterized in that it additionally introduced the engine control unit, which is connected with the fixing unit appears detuning compensation and is connected with the arc reactor with an adjustable air gap and the motor to adjust clearance, the engine control unit contains the first contactor contactor connected through the first auxiliary contact block fixation appears detuning compensation the second contactor contactor connected via a second auxiliary contact block fixation appears detuning compensation, and the third contactor contactor, and the first and second power contacts are connected to the arc-reactor with an adjustable air gap, and a third and a fourth the auxiliary contacts are connected to the shaper short pulses, moreover, the Executive relay connected to the shaper short pulses, the contact actuating relay included in the circuit of the third coil of the contactor, and the fifth and sixth auxiliary contacts connected in series respectively with the first contactor contactor and the second contactor contactor, in addition, the engine control unit is equipped with a rectifier bridge connected through limiting resistor and the third power contact to the arc reactor with an adjustable air gap and the motor to adjust clearance.