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Trigger device and trigger control method for thyristor switched capacitor-type (TSC-type) low-voltage dynamic switched switch

A technology of triggering device and switching switch, applied in flexible AC power transmission system, reactive power adjustment/elimination/compensation and other directions, to achieve the effect of reducing complexity, simple circuit, and improving power factor and voltage quality

Active Publication Date: 2015-04-22
黑龙江特通电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing TSC reactive power compensation system detects that the square wave signal has multiple level jumps near the zero point of the grid voltage, and provides a trigger device and trigger control for a TSC low-voltage dynamic switching switch method

Method used

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  • Trigger device and trigger control method for thyristor switched capacitor-type (TSC-type) low-voltage dynamic switched switch
  • Trigger device and trigger control method for thyristor switched capacitor-type (TSC-type) low-voltage dynamic switched switch
  • Trigger device and trigger control method for thyristor switched capacitor-type (TSC-type) low-voltage dynamic switched switch

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specific Embodiment approach 1

[0031] Specific implementation mode one: the following combination figure 1 , image 3 with Figure 5 Describe this embodiment, the trigger device of a TSC type low-voltage dynamic switching switch described in this embodiment, the trigger device includes an A-phase trigger device, a B-phase trigger device and a C-phase trigger device, and the A-phase trigger device, B-phase The structure of the trigger device and the C-phase trigger device are exactly the same, wherein the A-phase trigger device includes a detection unit 1, a logic processing unit 2, a trigger unit 3 and a trigger unit 2 4;

[0032] The detection unit 1 is used to detect the No. 1 voltage signal and the No. 2 voltage signal of the thyristor power unit 5 to be triggered; the No. 1 voltage signal refers to when the voltage at both ends of the thyristor power unit 5 to be triggered crosses zero positively , the voltage passing through the thyristor power unit 5;

[0033] The No. 2 voltage signal refers to the...

specific Embodiment approach 2

[0041] Specific implementation mode two: the following combination figure 1 Describe this embodiment mode, this embodiment mode will further explain Embodiment 1, the detection unit 1 described in this embodiment mode includes an optocoupler circuit assembly 1-1 and a logic gate circuit 1-2;

[0042] The output end of the No. 1 voltage signal detected by the detection unit 1 to be triggered by the thyristor power unit 5 is connected to the input end of the No. 1 voltage signal of the optocoupler circuit assembly 1-1;

[0043] The output end of the No. 2 voltage signal detected by the detection unit 1 to be triggered by the thyristor power unit 5 is connected to the input end of the No. 2 voltage signal of the optocoupler circuit assembly 1-1;

[0044] The output end of the No. 1 pulse signal AJVT1 of the optocoupler circuit assembly 1-1 is connected to the input end of the No. 1 pulse signal AJVT1 of the logic gate circuit 1-2;

[0045] The output end of the No. 2 pulse signa...

specific Embodiment approach 3

[0047] Specific implementation mode three: the following combination figure 1 with Figure 4 This embodiment will be described. This embodiment will further describe the first embodiment. The logic processing unit 2 described in this embodiment is implemented by using a programmable logic device CPLD.

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Abstract

The invention discloses a trigger device and trigger control method for a thyristor switched capacitor-type (TSC-type) low-voltage dynamic switched switch and relates to a TSC-type trigger device and trigger control method. The invention aims to solve the problem that multiple level jumping phenomena are generated by a square signal nearby the zero point of network voltage by adopting a traditional TSC reactive power compensation system. The trigger device comprises an A-phase trigger device, a B-phase trigger device and a C-phase trigger device. The A-phase trigger device, the B-phase trigger device and the C-phase trigger device are completely same in structure, wherein the A-phase trigger device comprises a detecting unit, a logic processing unit, a trigger unit I and a trigger unit II. The detecting unit of the A-phase trigger device is used for acquiring a voltage signal of a thyristor power unit, and outputting the voltage signal to the pulse signal input end of the logic processing unit; switched signals are sent to the trigger unit I and the trigger unit II by the logic processing unit; and trigger command signals are sent to the thyristor power unit by the trigger unit I and the trigger unit II. The trigger device and trigger control method for the TSC-type low-voltage dynamic switched switch are applied to electric power systems and industrial systems.

Description

technical field [0001] The invention relates to a TSC trigger device and a trigger control method. Background technique [0002] In recent years, due to the increase of grid capacity, the reactive power requirements of the grid are also increasing. It is the current development trend of power grids in various countries to solve the problem of reactive power compensation in the power grid, improve power factor, reduce line loss, save energy, and tap the potential of power generation and power supply equipment. [0003] According to statistics, among the three major line losses of transmission lines, high-voltage distribution network and low-voltage users, the line loss of low-voltage users is the largest. A large amount of reactive power seriously reduces the power factor of the system and increases the power loss and Power loss seriously affects the economic benefits of energy, manufacturing and other related industries. Therefore, reactive power compensation is of great s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/12Y02E40/10
Inventor 李国勇
Owner 黑龙江特通电气股份有限公司