SU105707A1 - A device that reacts to the phase shift angle and the sign of its change - Google Patents

Description

Psd The invention is a device that reacts to the shift angle φ: 5 and the sign of its change, containing a power direction relay, in particular a phase-sensitive circuit.

A feature of the proposed device is 1EN1; e. in order to ensure an unambiguous operation of its angle, an additional relay for the direction of energy, the zone of operation of which is shifted but otnop.; to the zone of the operating relay of the power e; c; rgii. An additional relay blocks the action of the latter in one of two ways: yii-: uyh ugls: in ep 1batyvani. In order to detect the specified shift of the working zone, a capacitor is turned on in the power supply circuit of one of the power direction relays, or both of these relays are connected to different phases of a three-phase circuit.

The device is intended to determine the occurrence of asynchronous operation. However, it: can also be used for any other purposes where it is necessary to determine whether the vector of one voltage is turned relative to another by an angle greater than the specified one.

but in the leg of the asynchronous mode; :: l1a of the synchronous machine of the power station with respect to the system or parts of the system among themselves, the characteristics: -; utss by turning the emf vectors Asynchronously, the parts of one part of the system are whitish than at iS0. In the case of asynchronous operation of parts of the power system to the chain of these vectors, l: the voltage in the vehicle is remote from n

In other cases, the vector emf. l generators: can be obtained by summing up the stator voltage vector and the overhead vector of the resistance resistance, as follows :; internal generator generator. If there is an angularization machine on the generator, i.e.:: the scarlet syncro generator 5 is rigidly connected to the shaft of the power generator, the voltage of this: 1 machine can be used as the emf vector. generator.

In any case, the determination of the fact that the notion of one vector is relative to the other by an angle is required. Ireznai Oiri; -z

No. 105707

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FIG. one

A / h / ip / gnai pattern repk asynchronous

2PR

MA / V AAV Ay MWVVvWvVvVVVV

fr

d, a)

FIG. 2

S)

270 - 80 ° When rotating in a negative direction, the vectors of EG, in, d into the zone of operation of the 2PR relay, puts it into action. Through the 2PR contacts, a 2RB blocking relay is triggered, which is its contacts. 2RB-blocks the output relay 1RB circuit, and the contacts 2RB-2. similarly to the previous one, it prepares its self-holding through the contacts of the SR relay. The relay 2РБ нро. Should be tightened until the 1PR relay disappears. In this way, the output relay does not operate when it is turned in the negative direction. The angle of operation of the device can be changed by summing up one or another combination of phases of the compared vectors to it or with the help of a phase loader setting.

The shift of the working area of the 2PR relay relative to the SR relay is realized by switching on the capacitor C, which creates an internal angle of displacement, in the phase-sensitive scheme of the PSF-2.

The same effect can be obtained by bringing other combinations of vectors to the phase-sensitive scheme of the PSF-2 than to the scheme of the PSF-1. However, this solution complicates the circuit design of the device and can be useful as an option in the absence of a capacitor.

Instead of phase-sensitive circuits, which are an organ for directing energy, one can adopt any of the known designs of a relay for directing energy.

The advantage of using an energy direction relay in the proposed device is not an option with phase-sensitive circuits is the ability to use standard relays which are pulled out by the windings. The disadvantages of using directional relays are the relatively large size of the device and the large power consumption which creates significant

difficulty with the need for compensation yarn in generator or in line.

The proposed device can be used in any case where it is necessary to determine the occurrence or existence of an asynchronous mode.

It comes into effect at the first. And the same cycle of non-synchronous progress. Prn need: yustp at the output of the device can be set to one of the known counting circuits, with which Iy1nulsh to shut off to be not at the first, but at the second or any of the subsequent cycles.

The device can also be used as a sliding relay. In this case, the output of the device or one of its polarized relays is fed to a time relay, which thus comes into effect during each cycle of an asynchronous run and when it is sufficiently small, the slip closes its contacts.

Subject invention

1. A device that reacts to a phase shift and a sign of its change, containing an energy direction relay, in particular a phase-sensitive circuit, characterized in that. that, in order to create an unambiguous operation of the device by the angle, an additional energy direction relay was applied, the operation zone of which is shifted relative to the energy direction operating relay zone and which blocks the latter at one of two possible response angles.

2. The device form according to n. 1, characterized in that for shifting the zone of operation of one energy direction relay relative to another, the capacitor is turned on in the power supply circuit of one of them or both relays are connected to different phases of a three-phase circuit.

Standartgiz. Sub. to pec. 12 / VIII 1957. Volume 0.375 p. L. Circulation 900. Price 75 koi, Medvezhiegorsk printing house Poligrafnzdat Karelian Autonomous Soviet Socialist Republic. 1401.

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FIG 3

No. 105707