RU17381U1 - CONTROLLED COMPENSATION DEVICE - Google Patents

Abstract

1. A controlled compensating device for controlling the consumption of reactive power, comprising a variable reactivity reactor unit for connecting to a substation bus, and a control unit, characterized in that the reactor block is made in the form of reactor sections equipped with switches that are designed to be connected to the substation bus via step-down power transformer. 2. The device according to claim 1, characterized in that when connecting the three phases of the reactor section into a triangle, each phase is equipped with two switches. The device according to claim 1, characterized in that the reactor sections are made without a magnetic circuit.

Description

GUARANTEED KO ЛПEHC51P: v СCHEE DEVICE Technician area

The utility model relates to the field of electric power industry, in particular, to devices for compensating for the extraordinary power of transmission lines (power lines). It can find application, for example, at substations 0, 330 and 500 b: V for regulating the voltage in the network by appropriate compensation of reactive power.

State of the art

At present, due to the combination of energy consumption in conditions of inadequate CMPpencing11I of the extravagant power of the thermoelectric power station, there is an increase in voltage at a number of high-voltage substations in excess of the permissible level. The tendency to increase n-gear in the main elec- trical: tricheskl-1x networks will continue in the future.

It is known that the compensating device adopted for the prototype is a 1sh / ndiruyu11Y reactor designed to compensate for the charging power 11.

The disadvantage of the prototype is the low reliability of device B less than daily regulation of real power and voltage, as well as one-stage regulation in the range from idle to nominal value. This is due to the fact that there are often lumps in the device 13 of the circuit breaker with a rated voltage of power lines of 220, 330, or 500 kV.

The objective of the utility model is to increase the reliability of the device in the regime of daily regulation of reactive power and voltage, and to ensure multi-stage regulation in the dia

The subject of the invention is a controllable compensating device containing a variable reactivity reactor unit for connecting to a substation bus, and a control unit that differs, according to the utility model, in that the reactor unit is made up of reactor sections designed to be switched on and off. connecting to the substation bus via a step-down power transformer,

The combination of these features provides increased reliability of the device and multi-stage regulation.

A useful model of i-iMeeT development is that. that when connecting the three phases of the reactor section into a triangle, each phase is equipped with two switches.

This reduces the rated current requirements for circuit breakers and thereby further increases reliability.

The utility model has another development, which consists in the fact that the reactor sections are made without a magnetic circuit.

This ensures the linearity of their characteristics.

Brief Description of the Drawings

The essence of the utility model, taking into account its development, is illustrated in FIG. 1, where, as an example, a circuit diagram of the proposed device for three reactor sections is shown, and FIG. 1, which illustrates the frequency case of performing a reactor section circuit when connected in a triangle.

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Field Model Implementation Description

The device of FIG. A contains ZhGT: 1, 2 and 3 - three reactor sections; 4, 5 and 6 - three switches; - Pon1et: ayu Shch1Y syryoyoy transformer;

8- bus substation;

9- L: EP;

10 and 11 - voltage measuring transformers on the substation and current busbars in the power transmission line. competently;

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The diagram of the reactor section of figure 2 contains:

1, IS and 19-phase reactor section connected in a triangular HliK; 20 and 1 - three-phase sets of switches.

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Reactor sections 1, and 3, equipped with switches 4,} and 6, form a reactor block connected to bus 8 via a low-voltage coil-side transformer on the winding side - 16 low voltage. The cycle of reactivity of the reactor unit is changed in steps by shifting the output switches 4, 5 and 6 under the control of unit 12.. The reactivity is controlled depending on the voltage measured on the bus 8 of the transformer 10, depending on the power () of the power transmission line 9, measured with using transformer 11 TOP; S. Block 12 controls the reactivity switching depending on the adjustable parameter, while providing a dead zone, inside which changing the parameter does not lead to switching switches. The monitoring of the connected state of current 1, S and 3 is ensured by means of measuring transformers 13, 14 and 15, respectively.

The increased reliability of the proposed device compared to the prototype is ensured due to the fact that KOMvr / tion of the reactor sections is performed on the low voltage side, which allows the use of switches 4, 5 and 6 with a switching resource of up to 40,000 on-off operations. This ensures reliable operation of the device at daily with -3 load maximums regulation of reactive fraud within 0-25 years.

Own substation circuits can be connected to the reactor section (see, fig,;. In this case, if the three phases 17, 18 and 19 of the reactor section are connected in a triangle, then each phase of the section can be disconnected by two switches. The section switches are shown on figure 2 combined in three-phase sets 0 and 1. Connecting the auxiliary circuits of the substation through the reactor sections allows you to use these sections as

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substation needs, and the introduction of switches inside the triangle section reduces the requirement for them in the rated current and, thus, further increases the reliability.

To maintain the linearity of characteristics during overvoltage, the reactors in sections 1 and 3 can be performed without a magnetic circuit.

Sources of information. 1- Shunt reactor RODD-5000/500. Power grid project

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Claims (3)

1. A controlled compensating device for controlling the consumption of reactive power, comprising a variable reactivity reactor unit for connecting to a substation bus, and a control unit, characterized in that the reactor block is made in the form of reactor sections equipped with switches that are designed to be connected to the substation bus via step-down power transformer.  2. The device according to p. 1, characterized in that when connecting the three phases of the reactor section into a triangle, each phase is equipped with two switches. 3. The device according to claim 1, characterized in that the reactor sections are made without a magnetic circuit.