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A new thyristor switch switching circuit

A switching circuit, thyristor technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation and other directions, can solve problems such as high-frequency oscillation and damage to thyristors, so as to reduce the adverse effects of high-frequency oscillation and reduce the amount of damage , the effect of strong practicality

Active Publication Date: 2018-05-15
山东德佑电气股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because according to the characteristics of the capacitor, when the voltage applied to the capacitor has a step change, an inrush current will be generated, which will damage the thyristor, and will also bring adverse effects such as high-frequency oscillation to the power system.

Method used

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  • A new thyristor switch switching circuit
  • A new thyristor switch switching circuit
  • A new thyristor switch switching circuit

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Embodiment Construction

[0026] Embodiments of the present invention are further described below in conjunction with accompanying drawings:

[0027] Such as Figure 1-Figure 7As shown, the novel thyristor switch switching circuit of the present invention includes a thyristor 1 and a switching capacitor controller 6, and is characterized in that: the thyristor 1 is connected to the zero-crossing detection circuit 2, and the switching capacitor controller 6 is connected to trigger control and The locking protection circuit 5, the zero-crossing detection circuit 2 and the trigger control and locking protection circuit 5 are connected to the trigger waveform generation circuit 3 through the AND gate U13, and the trigger waveform generation circuit 3 is connected to the thyristor 1 through the trigger driving circuit 4.

[0028] Such as figure 2 As shown, the AND gate U13 of the present invention is connected to the 555 multivibrator U10 of the trigger waveform generating circuit 3, and the output termin...

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Abstract

The invention relates to a novel thyristor switch switching circuit, in particular to a thyristor switch switching circuit for switching at zero voltage moment, which belongs to the technical field of power electronics and includes a thyristor (1) and a switching capacitor controller (6), The thyristor (1) is connected to the zero-crossing detection circuit (2), the switching capacitor controller (6) is connected to the trigger control and lock-up protection circuit (5), the zero-crossing detection circuit (2) and the trigger control and lock-up protection circuit (5 ) is connected to the trigger waveform generation circuit (3) through the AND gate U13, and the trigger waveform generation circuit (3) is connected to the thyristor (1) through the trigger drive circuit (4). The invention has simple structure and reasonable design, can greatly reduce the damage amount of the thyristor, reduce the adverse effect on the high-frequency oscillation generated by the power system, and has strong practicability.

Description

technical field [0001] The invention relates to a novel thyristor switch switching circuit, in particular to a thyristor switch switching circuit for switching at zero voltage moment, and belongs to the technical field of power electronics. Background technique [0002] The opening and closing of the thyristor is contactless, and its operating life is almost unlimited, and the switching of the thyristor can quickly connect the capacitor to the power grid without impact, which can reduce the operational difficulties during switching and realize dynamic reactive power. Therefore, thyristor switched capacitors have become a dynamic reactive power compensation device widely used in power distribution systems. However, the moment when the thyristor is put into the capacitor, that is, the moment when the thyristor is turned on, must be the moment when the magnitude and phase of the power supply voltage and the residual voltage of the capacitor are the same. Because according to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 孙国歧魏晓宾张玲艳沈晓鹏刘涛解静静刘光慧
Owner 山东德佑电气股份有限公司
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