SU107355A1 - Telecontrol system - Google Patents

Description

For the dispatching telemechanization of numerous small production facilities, such as oil wells, distributed over a large area of the oilfield, it is advisable to have a simple low-wire and low-relay telecontrol circuit.

Reducing the number of wires and relays can be achieved by applying the phase-code principle of selection using a transformer phase converter, which is powered by a three-phase external network. .

In order to further power the telecontrol scheme and reduce the number of wires in the communication line to one, it is proposed to install single-phase transformers at the receiving nodes, the primary windings of which are connected to the phase wires of the power network in such a way that they form in the secondary circuit a symmetric multiphase star identical to the star secondary voltage transformer phase converter at the control room. The secondary windings of transformers are connected at one end to ground, and the other to a ring relay connected to a common control wire.

FIG. 1 is a schematic diagram of the telecontrol system described; Fig. 2 shows the layout of its television channels in relation to the servicing of oil wells.

.. The control room is located in the main line, to which several AI executive points are connected. At the control room, there is a transformer converter for the number of phases TU, which forms a six-phase voltage star at the output. The primary winding of the converter TU is connected to the supplying three-phase network, and the goric one and has a grounded and zero point and is connected to the communication line U via control keys 7 /, etc.

At each executive point, the calling relays 1B-d-6b are connected between the secondary winding of a single-phase voltage transformer and the U-link. The second end of the secondary windings of transformers is grounded, and their first windings are connected to the power phases; the secondary circuit is a symmetric multiphase star, and a dentical star of the secondary voltage of the converter GI at the control room.

The described telecontrol system operates as follows:

A call to one or another control point is carried out by sending from the control point to the voltage wire of a particular phase using keys. So for example, if you apply a certain phase to the communication line D; in this case, F ;, then the voltage applied to all JB-fi-B relays will shift during the phase, but will not decrease its value. Only in the phase corresponding to the key number closed at the discreteMiepCKOM point, the voltage will become equal to zero and the corresponding relay (in this case, the explosive will disappear. Thus, six wires can be controlled via one connection wire using ground as a neutral). .

For telecontrol of twenty executive points over one control wire in the circuit, a shift-quality code construction can be applied using two phase qualities for each executive point. Of the six, only five phase qualities are used, which gives 20 executive points (the number of placements from 5 to 2). LJJesta phase has an auxiliary purpose.

The oiiHCbinaoMoii scheme uses three TV channels: a channel of six-phase synphasic quality. kaHcJt Tivieyrrp.iiijieHnH and “aial tele telezinz.: izatsin. contro / 1Р1Р rРvРРРcРРРР and teleism & rsgsh.

The three-phase networks of the power supply system itself (FIG. 2), including lines of various voltages and transformers, serve as a K4NZLOM with power supply, so that the control room and executive points can be connected to different parts of a complex branched power grid.

As a control channel and a remote signaling channel, two wires (telephone pair) are used in the existing telephone cables of the production facility. Ground is used as the return wire for the two channels.

The subject matter of the invention

The telecontrol system operating on the phase-code principle of selek, 1ChII and consisting of the control room, which has a transformer converter, connected to the communication line by the primary winding and the supplying three-phase network, and the secondary winding having a grounded zero point through the control keys, and a number of actuating stations equipped with call relays, characterized in that, in order to reduce the number of wires in the communication line to one, the call relay switches all actuator points between On the communication line and ground in series with the secondary windings of single-phase voltage transformers, the primary windings of which are connected to different phases of the three-phase network in such a way that the voltage of the secondary windings of these transformers form a symmetric multiphase star on the vector diagram identical to the multiphase star: tori nagings of the number of phase converter installed at the control room.

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