SU1319160A1 - Electric network - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to increase the efficiency of use of equipment and the quality of electrical energy in post-accident non-phase modes. In normal mode, the switching devices 7 and 8 are open and the capacitor battery 6 operates as a longitudinal compensation battery. In order to use the battery 6 in the post-emergency non-full phase mode, to compensate for the individual zero-sequence resistance, it is necessary to close the switching devices 7 and 8, 2 hp. f-ly, 2 ill. Ed

Description

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The invention relates to electrical engineering, namely to the schemes of operation of high-voltage networks in an incomplete phase mode.

The purpose of the invention is to increase the efficiency of use of equipment and the quality of electrical energy in post-accident non-phase modes.

Fig, 1 shows the proposed high-voltage network; FIG. 2 is an additional jumper for adjusting the resistance of a capacitor battery.

The electrical network contains a power line 1 connected on one side to a power source with a low-grounded neutral 2, and on the other hand connected to one terminals of the high voltage winding 3 of the transformer, the other winding 4 of which is connected to the load 5. and the other terminals of the condenser ™ commutator battery 6 are connected to the neutral leads of the winding 3 of the high-voltage transformer, which are shunted by the switching devices system 7. General point of switching arresters comrade 7 is grounded through an additional switching device 8. The capacitor bank 6 shunted system protective device 9 with a threshold response characteristics.

The electrical network (Fig „2) additionally contains a three-phase jumper 10 installed between the capacitor battery 6 and the additional capacitor battery 11. Jumper 10 is grounded through the protection device 12c with the triggering response characteristic, and the capacitor battery 6 is bounded by the trigger characteristic 13c with the trigger response characteristic.

The electrical network (Fig. 1) has the possibility of using a capacitor battery 6 in both normal symmetrical and post-emergency non-phase mode.

In the normal mode, the switching devices 7 and 8 are open and the capacitor battery 6 operates as a longitudinal compensation battery. In post-phase failure phase mode, a capacitor battery 6 can be used to connect an inductor02

zero impedance network, which increases the quality of the voltage and increases the network bandwidth. For this

The electrical resistance module of the battery 6 should not exceed the network zero-inductive resistance module, and the switching device 7 is closed. Protective

device 9 is intended to limit overvoltages on condensate. pax 6 in accident mode. The switching device 8 allows you to extinguish the accompanying current arc

through protection device 9.

In a number of cases, the resistance of the capacitor battery 6 is insufficient to fully compensate for the inductive resistance of the zero-sequence network. Then, in series with the battery 6, an additional battery 11 is installed, the resistance value of which is selected from the condition of complete compensation of the inductive

resistance zero sequence network.

In order to not degrade the parameters of the symmetric mode of operation, a jumper 10 is inserted between the batteries 6 and 11, a shunt battery 11 for the forward and reverse sequence currents.

Battery 11 is only used in post-emergency non-phase-to-phase modes.

and the battery 6 in both normal and post-emergency modes.

Claims (2)

1. An electrical network containing a power transmission line, connected to one power source with: deaf earthed neutral, and with The other side is connected to the same terminals of the high voltage winding of the transformer, another winding of which is connected to the load, a capacitor battery, some of which are are grounded, and the other terminals of the capacitor battery are connected phase-wise to the other output wires of the high voltage winding of the transformer, which is increasing the efficiency of using equipment and the quality of electrical energy in post-emergency non-phase-modes; it additionally contains switching devices and 313 protective devices with a threshold characteristic, with switching devices connected to a four-beam star and protective devices to a three-beam star and. Both of these stars are connected between the phases of the other terminals of the capacitor battery and the ground. 2. The electrical network according to claim 1, wherein the capacitor battery is phase-divided into two sections, and between the junction points of the sections of each phase 04 jumpers are turned on, and all sections are shunded with additional protective devices, and the terminals of the section connected to the ground are connected to the terminals of the corresponding protective device, 3, Electrical network according to claims 1 and 2, characterized in that the resistive modulus of a capacitor battery is chosen equal to the resistivity module of the zero sequence of the network. 4Z about Compiled by A. Mikhailov. Editor N. Tupitsa Tehred L. Oliynyk. Corrector I. Muska 2522/50 Circulation 618 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Myskva, Zh-35, Raushsk nab., d.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4 Fi & 2