SU635433A1 - Apparatus for remote measuring of the output of short-range power systems - Google Patents

Description

one

The device relates to telemeasurement systems of short range and is intended for telecontrol and telecontrol of electrical systems of power systems and industrial enterprises.

The news is a device for telemetry measurement of short-range power systems, which consists of a primary measuring transducer of the measured mode parameter, a communication channel (two-wire control cable), and an output measuring device 1.

The disadvantage of the device is that it is possible to obtain teleinformation only about the kind of power.

The closest to the invention according to the technical essence and the achieved result is a device consisting of two primary measuring transducers with power and power, two two-core control cables and two output measuring instruments 2.

In order to tele measure each type of power, at least one primary measuring transducer i is necessary; no more than two control cables.

The purpose of the invention is an automaton 1: 5p,) 1 measurement process.

The goal is achieved; This unit contains an electronic unit for optimized instantaneous values of the phase current and voltage and a unit for triggering instantaneous active power, with the output of the electronic multiplying unit instantaneous the magnitude of the phase current on the voltage is connected to the control cable and through it to the extremum memory unit the instantaneous active {} th mon1, the east, the output of which is connected to the output unit block.

Pa drawing shows a structural diagram of the device telesmeal power of the power systems of the near field.

The device consists of an electronic unit 1, multiplying 1 of the magnitude of the magnitude of the phase current and voltage, a control cable 2, a block 3, which is called the extremum of the instantaneous actual power and the output measuring unit. At the same time, the output of the electronic unit 1 multiplying the instantaneous phase current ii and h: e: 1 via the two-way control cable 2 (unified1I1e) {with the 15th unit run; apol ;; 11; а11 the extremum of the instantaneous 5th: Lone, and | Connected to the output measuring unit.

3

The operation of the device is as follows.

The input current and input voltage from the measuring current and voltage transformers installed on the monitored object are located at the input of multiplication unit 1, and the signal is received at the output of this unit

(t) K, i ((t},

where / Ci is the conversion factor of block 1. This signal is fed via two control cable 2 to the input of block 3. In the block for storing instantaneous activation of the OY power, a selection and memorization of the values (I (s) and / p) proportional to The average value of the active and total AC power. The signals / (s) and 1 (p) are received from the output measurement unit 4, where the total and active power are measured by the instruments.

When using the proposed device, a minimum of two times both the number of required primary static measuring devices of various types of power and the control cable is provided. Applying it

reduces both capital and operating costs in the operation of telemechanical devices of power systems.

Claims (2)

1. Ilyin V. А. Telecontrol and telemetry. M., “Energie, 1974, p. 1951. 2. USSR author's certificate L 110367, cl. G 01R 21/00, 1952.