UA15714U - Generator of high-power current pulses for simulating lighting discharge - Google Patents

Abstract

The proposed generator of high-power current pulses for simulating lighting discharge contains a capacitive energy storage, a main discharger, an active-inductive loading element, a load switch with an additional discharger, and a correcting capacitor. The additional discharger contains a control electrode, which is connected to the correcting capacitor via an inductance-capacitance circuit.

Description

Description of the invention

The proposed generator of large pulsed lightning currents is intended for use in 2 electrical engineering and high-voltage pulsed technology for the formation of lightning pulsed currents and the creation of large pulsed magnetic fields used in conducting various physical studies.

Known generators of large pulsed currents used in various electrophysical installations for: - magnetic pulse processing of metals |11; - physical research in high-current electronics and plasma production |2, 31; 70 - testing of electrical engineering and power equipment for resistance to lightning discharges

IM.

The closest in technical essence to the proposed generator of large impulse currents of lightning is the generator of impulse currents, which consists of a capacitive energy store, a main discharger, an active-inductive load, a load breaker with an additional uncontrolled discharger, 12 in parallel with which the correction capacitor |51I is turned on.

In this generator of impulse currents, the correction capacitor creates the conditions for the activation of the additional uncontrolled discharger of the circuit breaker of the active-inductive load at the moment of time, which is close to the moment when the current in the active-inductive load reaches its maximum value.

The experience of operation of the above-mentioned pulse current generators shows that the spread of the moment of activation of the additional uncontrolled arrester of the load breaker leads to distortion of the form of the pulse current formed in the active-inductive load, and accordingly to the unstable operation of the generator.

The task of the proposed useful model is to increase the stability of the generator of large impulse lightning currents. 29 The technical result is achieved by the fact that in the generator of large impulse lightning currents, which includes a capacitive energy store, a main arrester, an active-inductive load and a load breaker with an additional arrester, in parallel with which the correction capacity is turned on, instead of an uncontrolled additional arrester, a controlled arrester is used a discharger, the control electrode of which is connected through a separation capacitance and an inductive-capacitive circuit to a part of the capacitors that create M correction capacitance. "--

Fig. 1 shows the basic electrical diagram of the proposed generator of large impulse lightning currents, which consists of a capacitive energy storage having capacity 1, inductance 2 and active - resistance 3, the main discharger 4, an active-inductive load, which has inductance 5 and active resistance b, the load switch, which has an inductance 7, an active resistance 8 and a correction capacitor containing 325 series connection of high-voltage capacitors 9, 10 and 11. The proposed generator of large lightning impulse currents also includes an inductive-capacitive circuit, which has a capacity 12 and an inductance 13, a separation capacity 14, which is connected to the control electrode 15 of the controlled additional discharger, which has a main 16 and an auxiliary 17 discharge gap. "

In Fig.2, the curve 18 shows the pulse voltage tsu, which causes an electrical breakdown of the auxiliary C 70 discharge gap 17 of the controlled additional discharger of the switch of the active-inductive load. c Here, curve 19 shows the impulse voltage pr on the main discharge gap 16 as compared to its electrical

With" the breakdown, as well as after. In Fig. 2, curve 20 shows the change in pulse current and, in an active-inductive load, which has an inductance of 5 and an active resistance of 6. In Fig. 2, the following designations are adopted:

Одт - the maximum value of the voltage tsd acting on the auxiliary discharge gap 17 and causing its electrical breakdown; - Ort - the maximum value of the voltage and p acting on the main discharge gap 16 of the controlled sl additional discharger of the switch of the active-inductive load; - Yrt - the moment of time that corresponds to the positive amplitude of the pulse voltage p on the main bit gap 16; -k 70 Ip - the maximum value of the impulse current i,, in the active-inductive load;

I» ilt - the moment of time at which there is an electrical breakdown of the auxiliary discharge gap 17 and a cut of the impulse voltage ur on the main discharge gap 16; il is the time when the current i in the active-inductive load reaches its maximum value.

The generator of large impulse lightning currents works as follows. After the operation of the main 29 discharger 4, the pre-charged capacity 1 of the accumulated energy is discharged to the active-inductive load with an inductance of 5 and an active resistance of 6. At the same time, the pulse voltage begins to increase

Mr acting on the main discharge gap 16 of the controlled additional discharger of the load breaker.

The current from the load circuit breaker, which contains the inductance 7, the active resistance 8, the series-connected capacitors 9, 10 and 11, lags behind the impulse voltage Mr. It reaches its maximum negative value of 60 at the moment of time (n, when the current iu in the load reaches its maximum positive value I pt (see

Fig. 1). If the parameters of the inductive-capacitive circuit, which includes a capacitor 12 and an inductance 13, are selected in such a way that its connection practically does not change the shape and amplitude value of the voltage M p, which acts on the main discharge gap 16 of the additional discharger of the load breaker, then the impulse voltage Cr on capacitor 14 and inductor 13 takes the form of curve 18 in Fig.2. because To increase the efficiency of the indicated generator, the electrical parameters of the inductive-capacitive circuit, which includes capacitance 12 and inductance 13, are chosen in such a way that the pulse voltage y reaches its maximum value not at the moment of time (y, but a little later - at If the length of the auxiliary discharge gap 17 is selected so that its electrical breakdown occurs at the time of the accident, then the operation of the entire additional controlled discharger of the load breaker occurs almost simultaneously with it (see curve 19 in Fig. 2). thus, an aperiodic pulse of current i will be formed in the load, which has an inductance of 5 and an active resistance of 6 (see curve 20 in Fig. 2).

The use in the proposed generator of large impulse lightning currents of a controlled additional discharger of a load switch with a control electrode 15, which is connected to a part of the capacitors of the correction capacity through the separation capacity 70 14 and the inductive-capacitive circuit, allows to increase the stability of the operation of this generator in a wide range of the operating voltage of the capacitive energy storage .

References: 1. Belii I.V., Fertyk S.M., Khimenko L.T. Handbook on magnetic pulse processing of metals. -

Kharkov: Higher School, 1977. - 168p. 2. Kremnev V.V., Mesias G.A. Methods of multiplication and transformation of pulses in high-current electronics. -

Novosibirsk: Nauka, 1987. - 2266. 3. Glebov I.A., Rutberg F.G. More powerful generator! plasma - M.: Znergoatomizdat, 1985. - 1526. 4. DSTU 3681-98. Resistance to lightning discharges. Technical requirements and test methods. Kyiv:

State Standard of Ukraine, 1998. - 27 p. 5. Patent Mob3747 Ukraine, IPC NOZKZ/53. Impulse current generator / M.I. Baranov, M.M. Ignatenko, A.K.

Kolobovskyi. - Mo2503065338; Announced on 10.06.03; Imprint 15.08.05, Bul. As. - 4s.

Claims (1)

The formula of the invention is more detailed in the Generator of large pulsed lightning currents, which contains a capacitive energy accumulator, a main discharger, an active-inductive load, a load breaker with an additional discharger, in parallel with which the correction capacity is turned on, which is distinguished by the fact that the additional discharger of the load breaker is made in in the form of a controlled discharger, the control electrode of which is connected to a part of the capacitors of the correction capacity through the separation capacitor "zo" and the inductive-capacitive circuit. "- in IF) yo - and? - 1 - and - 70 s» 60 b5