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Alternating current (AC) stepped controllable single-phase/three-phase shunt reactor

A technology of reactor and parallel connection, applied in the direction of AC power input conversion to AC power output, electrical components, reactive power adjustment/elimination/compensation, etc., can solve the problem of limiting line transmission capacity, power transmission and transformation system voltage reduction, and affecting the power grid Safety and stability level and power quality and other issues, to achieve the effects of reducing impact, fast response, and convenient adjustment

Inactive Publication Date: 2011-06-22
TBEA SHENYANG TRANSFORMER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the construction and development of ultra-high voltage and ultra-high voltage power grids, for longer transmission lines, in order to limit the power frequency and operating overvoltage, it is necessary to configure high-voltage shunt reactors on the line, but the inherent characteristics of conventional high-voltage shunt reactors cannot be adjusted. It is easy to cause the voltage reduction of the power transmission and transformation system, affect the safety and stability of the power grid and the power quality, and limit the transmission capacity of the line

Method used

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  • Alternating current (AC) stepped controllable single-phase/three-phase shunt reactor
  • Alternating current (AC) stepped controllable single-phase/three-phase shunt reactor
  • Alternating current (AC) stepped controllable single-phase/three-phase shunt reactor

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Embodiment 1

[0020] The present invention includes two types of AC step-controlled single-phase shunt reactor and AC step-controlled three-phase shunt reactor, wherein the AC step-controlled single-phase shunt reactor has main reactors and graded reactors, wherein the main The reactor is in the form of a single phase, its primary coil is directly connected to the power network, and the secondary coil is connected in parallel with one or more graded reactors, and each graded reactor has a control part to control its input and cut-off.

[0021] The control part of each graded reactor includes a circuit breaker, a thyristor assembly and an isolating switch, wherein the isolating switch and the thyristor assembly are connected in parallel with the circuit breaker, and then connected to the parallel branch where the graded reactor is located. The control terminals of the isolating switch and the thyristor assembly are connected to the output terminal of the central controller 4 respectively.

...

Embodiment 2

[0035] The difference from Embodiment 1 is that the present invention is an AC stepwise controllable three-phase shunt reactor, which has a main reactor and a graded reactor, wherein the main reactor is in the form of three-phase, and its three-phase primary coil is "Y "Connected, directly connected to the power network, grounded through a small reactor or directly grounded after the neutral point is short-circuited; in the three-phase secondary coil, each phase secondary coil is connected in parallel with one or more graded reactors, each graded The reactors are respectively connected to the control parts that control their input and cut-off; the phases of the secondary side are closed and connected, and the ends are directly grounded.

[0036] The control circuit of each graded reactor includes a circuit breaker, a thyristor assembly and an isolating switch, wherein the normally open contact of the isolating switch and the thyristor assembly are connected in parallel with the...

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Abstract

The invention relates to an alternating current (AC) stepped controllable single-phase / three-phase shunt reactor, which comprises a main reactor, a graded reactor, a detecting unit and a central control unit, wherein the main reactor is in a single-phase or three-phase form; a primary coil of the main reactor directly accesses a power network, and a secondary coil of the main reactor is connected in parallel with one or more graded reactors, and each graded reactor has a control part for controlling the connection and disconnection of the reactor respectively; the input end of the detecting unit is connected with related parameter information of the power network and the main reactor, and the output end of the detecting unit is connected with the central control unit; the control end of the central control unit is connected with the control part of each graded reactor. In the invention, the graded reactor is designed to be connected in parallel with the secondary coil of the main reactor, so that the regulating capacity range can be in various combinations, the regulation is convenient, and the response speed is fast. The reactor provided by the invention has all the functions and properties of a common reactor, more harmonic waves are isolated, and the influence on the power network is reduced; the short-circuit impedance of the main reactor can be designed to be less than 100%.

Description

technical field [0001] The invention relates to a reactor used in power transmission lines, in particular to an AC step-controlled single-phase / three-phase shunt reactor. Background technique [0002] With the construction and development of ultra-high voltage and ultra-high voltage power grids, for longer transmission lines, in order to limit the power frequency and operating overvoltage, it is necessary to configure high-voltage shunt reactors on the line, but the inherent characteristics of conventional high-voltage shunt reactors cannot be adjusted. It is easy to cause the voltage reduction of the power transmission and transformation system, affect the safety and stability of the power grid and the power quality, and limit the transmission capacity of the line. Contents of the invention [0003] Aiming at the problem that conventional high-voltage shunt reactors in the prior art cannot be adjusted, which affects the safety and stability of the power grid and the quali...

Claims

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Application Information

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IPC IPC(8): H02P13/00H02J3/18
CPCY02E40/30
Inventor 钟俊涛安振章海庭
Owner TBEA SHENYANG TRANSFORMER GRP CO LTD
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