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TSC switching method, terminal device and computer readable storage medium

A technology of terminal equipment and preset angles, which is applied in flexible AC power transmission systems, reactive power adjustment/elimination/compensation, etc., can solve problems such as inaccurate zero-crossing detection, switching inrush current, etc. Impact, improve the effect of switching speed and efficiency

Inactive Publication Date: 2018-12-07
WUHAN CENTURY SUPERPOWER TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a TSC switching method, terminal equipment and computer-readable storage medium, aiming to solve the inaccurate zero-crossing detection and easy The technical problem of generating switching inrush current

Method used

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  • TSC switching method, terminal device and computer readable storage medium
  • TSC switching method, terminal device and computer readable storage medium
  • TSC switching method, terminal device and computer readable storage medium

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Embodiment Construction

[0036] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] The solution of the embodiment of the present invention is mainly: the present invention judges whether the current capacitor residual voltage value is less than the current grid voltage peak value through the terminal equipment when receiving the switching signal, and when the current capacitor residual voltage value is less than the current grid voltage value At the peak value, judge whether the phase difference between the current grid voltage phase and the current capacitor phase is within the preset angle range, and when the phase difference is within the preset angle range, send a pulse signal to the target thyristor switching capacitor TSC In order to make the target TSC turn on after receiving the pulse signal, it can improve the accuracy of zero-crossing detection, shorten the switching time, improve th...

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Abstract

The invention discloses a TSC (thyristor switched capacitor) switching method, a terminal device and a computer readable storage medium. The method comprises when the terminal device receives a switching signal, determining whether a current capacitor residual voltage value is less than a current grid voltage peak value; when the current capacitor residual voltage value is less than the current grid voltage peak value, determining whether a phase difference between a current grid voltage phase and a current capacitor phase is within a preset angle range; and when the phase difference is withinthe preset angle range, sending a pulse signal to the target TSC in order that the target TSC is turned on after receiving the pulse signal. The method can improve the accuracy of zero-cross detection, shortens switching time, increases switching speed and efficiency, and avoids the impact of inrush current on the grid.

Description

technical field [0001] The invention relates to the field of reactive power compensation of a grid, in particular to a TSC switching method, terminal equipment and a computer-readable storage medium. Background technique [0002] Thyristor Switched Capacitor (TSC) is one of the effective devices for compensating grid reactive power. Compared with methods such as Static Var Generator (SVG) and contactor switched capacitor, it is more cost-effective and reliable It has great advantages, so it has been widely used. In the original device that uses capacitors as reactive power compensation, there are two connection methods of "Y" type and delta connection according to different application occasions. No matter what kind of load type, delta connection is the most widely used. In the delta connection of capacitors, the switching switch (thyristor) has two modes: inner control (3 thyristors) and outer control (2 thyristors), because only 2 thyristors are needed for the outer contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCH02J3/18Y02E40/10
Inventor 邢伟孙建军李军华
Owner WUHAN CENTURY SUPERPOWER TECH CO LTD
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