SU1343496A1 - Arrangement for compensating for reactive power and current-switching - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to expand the functionality by combining the functions of reactive power compensation and switching the load current. In the event of a short circuit in the load circuit, the signals from the current sensors 6 enter the control unit 7. The control unit stops the supply of control pulses to the main thyristor keys 1 and sends pulses to open the switching thyristor keys 5. The switching thyristor keys 5 open, and Yes, a group of 2 capacitors provides reliable locking of the main thyristor switches 1. In the normal mode of operation, groups 2 and 3 of the capacitors perform the function of reactive power compensation, thereby achieving the pos a goal is missing. 1 hp f-ly, 2 ill. with (L

Description

113434962

The invention relates to electro-signals from current sensors 6 of the equipment, is fed to control unit 7 and, if you want, the aim of the invention is to increase the rhenium-generated functionality of groups 2 and 3 of reactive power generated by capacitors by combining the compensation functions more reactive power, reactive power and switching of the required load, the load control unit 7 generates pulses, and FIG. 1 shows the scheme proposed for controlling the controlled device to be controlled; FIG. 2 - one Q reactor 8 systems of the automatic one from the variants of switching on the coil control by the inductance response compensation mode. Rated power, thus preventing the main thyristor switches 1 with the overcompensation mode . chen to the load circuit. Condenser In case of short circuit or inadequate battery consisting of two successive overload signals from the sensor-connected groups 2 and 3, the current substrates 6 enter the control unit 7. They are connected in parallel to the terminals for division, which terminates load control feed. The coils 4 of the inductive pulses on the power tirissivity and commuting thyristor torrent keys 1 and at the same time deliver the keys 5, interconnected in succession 20 pulses to open the commutating consequently, are connected from one of the thyristor switches 5, which are open to The main thyristor inputs are wired, and the voltage of the capacitors of the keys 1, and on the other hand, is connected to the group 2 at the connecting point at the junction point of the two groups 2 and the main thyristor switches 1, that 3. The current sensors 6, set to 25, provide their lock set, the output of the main thyristor keys

1, are connected by outputs to block 7 of the formula for taking control. Parallel to the load under-. 1. A device for compensating a controlled reactor 8 is switched. The active power and current switching, the strokes of the control unit 7 are connected to Q containing thyristor switches and a sensor-controlled reactor 8. current circuits in the load circuit, condensation main thyristor switches 1 and com - torus batteries and coils inductively-mutated thyristor keys 5, commutating thyristor keys, form groups of counter-parallel, characterized by the fact that the thyristors are switched on. Regu in order to expand functional

Led reactor 8 for providing capabilities by combining the functions of smooth compensation of reactive power — reactive power compensation and carrying is connected to the network through its switching current load, the capacitor — counter-parallel-connected, these batteries are made in the form of two portions. Capacitances of the capacitors of each of the connected each extreme terminals to groups 2 and 3 are equal and are selected from the usable terminals for connecting the forced load to the computer, and the average home - four mutations of power thyristors cut commuting thyristor key and

coil inductance to the appropriate coil inductance (taking into account the output for connecting the tap source) is chosen so that the gate, parallel to the outputs of the half-period of the natural oscillation to connect the load, is connected to the SC loop more than its own input controlled reactor, the main thyristor off time - 2. The device according to p. 1, about t of l and ny keys 1.50 that, in order to

The device operates as follows: reliability of locking with a key. New thyristor keys, each. In normal mode, the main inductance is connected between the torrent keys 1 open, commutated with groups of the corresponding capacitor – jsyie thyristor keys 5 and locked Intermediately, therefore, the capacitors of groups 2 of water, in this case, part of the active power inductance coil with a smaller number of turns is included in the compensation circuit and 3 of the compensation function.

To the block and the protection of b1

Figg

Compiled by V.Rudensky Editor N.Lazarenko Tekhred L.Serdyukova Proofreader I. Muska

Order 4832/53 Edition 617 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

Claim 1. A device for reactive power compensation and current switching, containing thyristor switches and current sensors in the load circuits, capacitor banks and inductors, switching thyristor switches, characterized in that, in order to expand the functionality by combining the functions of reactive power compensation and current switching loads, capacitor banks are made in the form of two series-connected groups, each connected by extreme terminals to the corresponding terminals for connecting the load, and the middle terminal - through the switching thyristor switch and the inductor to the corresponding terminal for connecting the power source, and in parallel with the terminals for connecting the load connected connected adjustable reactor. 2. The device according to p. ^ Characterized in that, in order to increase the reliability of locking the main thyristor switches, each inductance coil is connected between the groups of the corresponding capacitor bank and has an intermediate output, while a part of the inductance coil with a smaller number of turns is included in the switching circuit. t π fa _ To the control and protection unit of FIG. 2 Compiled by V. Rudensky Editor N. Lazarenko Tehred L. Serdyukova Corrector I. Muska Order 4832/53 Circulation 617 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and printing company, Uzhhorod, st. Project, 4