SU555497A1 - Electromagnetic Energy Dissipation Device - Google Patents

Description

(54) DEVICE FOR SCATTERING ELECTROMAGNETIC

ENERGY

its current throughput is limited. Increasing stability by controlling the valve serial connection requires complex control circuits.

The aim of the invention is to increase the stability of the device:; impulses of the operating voltage at the reactor.

For this, in the proposed arrangement, a thyristor is connected between the anode and the control electrode of which a threshold element, for example, a zener diode, is connected in turn to the valve and the active resistance. To provide automatic step-by-step adjustment of its throughput capacity in a parallel circuit device, a gyuktir / reactor, additionally another circuit with stabnitron, the drawing shows a schematic diagram of an electromagnetic energy dissipation device (-iaKonnevrdoi: B reactor, for example, a traction current, into which, depending on the magnitude of the short-circuit current to be shut off, the required number of parallel circuits is inserted: x circuits that dissipate electromagnetic energy. At least two parallel and identical discharge circuits, each discharge circuit, for example, consists of active resistance 1, which is connected to the negative terminal of reactor 2 by one pole and to the anode of the thyristor 3, the cathode of which is connected to the diode anode 4 (groups of series-connected diodes are better than avalanche5-.1х), the cathode of the latter is connected to the positive side of the reactor for unlocking the thyristor 3, a threshold element, for example, zener diode 5, is connected between the anode and the control electrode

Torah.

In the event of a short spinning of the network on the rolling stock at the initial moment of time, all voltage is applied to the reactor. The device does not react to this voltage boost, since the permissible reverse voltage of diode 4 (a group of series-connected diodes) is chosen greater than the amplitude of the maximum potential voltage across the reactor. If at the same time the short-circuit current Dp is turned off by a substation feeder switch, a self-induced emf with a plus sign appears on the negative terminal of the reactor. As soon as its veschgchina reaches the setpoint value of the threshold element - that circuit will control the thyristor current through the control of the thyristor 3 electrode. As a result, the current tJpzamcknets contour 2, 1 3, 4, 2. As

the increase of this current on the resistance 1 will increase the drop of the coil x m "w .. The entire resistance of J. is chosen such that {when a current flows through it, approaching the permissible (limited by thyristor 3 or diode 4) a voltage drop is created on it It is sufficient to unlock the thyristor Dg — any other euie locked by analogs of that device.

The use of such a device, due to a decrease in the level of switching overvoltages, significantly reduces operating costs by facilitating the working conditions of the insulation and valve arresters, which contributes to an increase in their service life. Due to the dissipation of a large proportion of energy in the active resistance of the bypass device, the service life of the arcing chambers of the feeder switches sharply increases and the shutdown time is reduced, which reduces the likelihood of overheating of the contact wires.

Claims (2)

1. A device for dissipating electromagnetic energy stored in a reactor, for example, a constant-current traction substation at the pick-up circuit, for example, per 1 ™ and 31g; and, the cues of this circuit, the current flowing through:; ktor 2. ramifies to a parallel parallel ruyusha circuit and (-.ta target razgp ;: kaa s. If the same current Er: continue: - voir.gtag n approached 1C lopus: -EB - h: at zachel-gyu vepGO two is on; t e, v.Kc- uij-KauiM and two :: pair; tel: about the current of current with countercurrent-x 1 stopr; -: sc., j 3 next cep and t, d., H-i-. hch) riupafu e. Bit size: 11x tol.i otfedadoad Lsch and loading each; i3 t-their possible current in the reactor of 2 G, dregs, unlock steam / ch. .becky chains but has a getgyk flag. When using the GI, Ps1ralle,; yy1X cent n x one: s kden1 cp: x1x elements of pore-. gi triggering blink; and i-ie, Mr. Rybut ™, with a special setting for the level of every other penalty. The maximum value of the operation of the device of aritgls with 1e is only greater than the level of eg also: 1a of the time component that is taken up in the reactor in the field operation. When used in thyristor devices for diodes with laving-type characteristics, there is no need to adopt special measures to ensure a normal distribution of the reverse voltage between the series-connected cams, which contain all electrical cables, resistance and valve, Ы1; 1х;: - 2kg parallel to the indicated reactor and K) LU e 6 with the fact that with ru, Cj 1 Shenin resistance to shocks tde yu at a reactor in a reactor, post-aeronautical valve and active BKi-froqet; thyristor, between; RAV; W; Oshi-1 Electrode. Which Threshold Element} for example, 2. The device according to claim 1, characterized by the fact that, in order to ensure automatic stepwise adjustment of its capacity, at least one more circuit is connected in parallel to the reactor, containing sequentially connected active ss ". Anti-flicker, the vertical to the thyristor, between the and and and; the transmitting electrode of which is connected to a threshold eement, such as a zener diode. /,; - target4 irLL and- ™ t rTb-t ; "" "Gch.uzhl i ™ .1- 2Я 14еп1, - f-m ™ 3 th