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High-capacity controllable reactor

A reactor, large-capacity technology, used in electrical components, circuit devices, emergency protection circuit devices, etc., can solve the problem of large secondary side current, and achieve the effect of stable response

Inactive Publication Date: 2003-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the required primary side current is large, the secondary side current will also be large. Due to the limitation of the capacity of the existing switching devices, it is impossible to manufacture a large-capacity controllable reactor.

Method used

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the controllable reactor in the present invention is mainly composed of five units: current detection unit I, compensation current generation unit II, transformer III, main control unit IV, and current signal setting unit V. The current detection unit 1 includes a current transformer 2 located on the primary grid bus 1 of the transformer, and a current detection link 3 connected to the output end of the current transformer 2 . The compensation current generating unit II is composed of N (N≤500) identical compensation current generating subunits II'. Transformer III, the secondary side of which is provided with N windings, each of which has W turns 2 , with the same geometric dimensions.

[0021] The working principle of the above controllable reactor is:

[0022] (1) The current sensor 2 sends the current (i) waveform of ...

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Abstract

The reactor comprises the current detecting unit I, the compensation current generating unit II, the transformer III, the main control unit IV, the current signal setter cell V. The said unit II comprises N identical subunits II'. Each subunit in the N identical subunits generates the compensation current alphai2 / N in same magnitude and same phase, which is in opposite phase to the current signal ils on the generatrix at the primary side, in order to follow the signal ils. There are also N windings with same number of turns and same size at the second side. Each winding is conncted to the said subunits II'. Based on designed operating mode, the primary winding can be connected to a generatrix of power networks in serial or parallel, making the impedance of the transformer present the controlable change in (0 Zm) to a current. The invention uses devices with lower voltage and smaller current to produce controllable reactor suitable to operation at high voltage and larg current.

Description

technical field [0001] The invention belongs to the technical field of controllable reactors, in particular to a large-capacity controllable reactor. Background technique [0002] So far, there are mainly three types of controllable reactors: the first type is TCR (Thyristor Controlled Reactor), which generates strong harmonic currents, and the third harmonic current can be as high as 30% for single-phase systems, and the price is also higher; The second type of TCT (thyristor control transformer), which is a deformation of TCR, its price is cheaper than TCR, it will also generate strong harmonic current, and it is not suitable for a wide range of reactance adjustment; the third type is DC magnetic assistance (Magnetic valve type) controllable reactor, it will generate strong harmonic current, and will generate strong vibration and noise. In 2000, the inventor invented an adjustable reactor based on magnetic flux compensation (application number: 00114356.5, application dat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02H9/08
Inventor 陈乔夫
Owner HUAZHONG UNIV OF SCI & TECH
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