Thyristor triggered control method and device for dynamic reactive compensation

A technology of trigger control and thyristor, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as lack of real-time performance, response speed limitation, etc., and achieve good application prospects

Inactive Publication Date: 2006-11-08
顺特电气有限公司
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  • Thyristor triggered control method and device for dynamic reactive compensation
  • Thyristor triggered control method and device for dynamic reactive compensation
  • Thyristor triggered control method and device for dynamic reactive compensation

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[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0049] see Figure 1-Figure 3 , The thyristor trigger control method for dynamic reactive power compensation timely collects the voltage U1 of the two ends a1 and a2 of the anti-parallel thyristor, and collects the voltage U2 of the two ends of a1 and a3 of the anti-parallel thyristor and the capacitor. The voltage U2 is used as the basis for determining the time when the entire capacitor branch is put into use; among them, the voltage U1 is the voltage across the thyristor, and the voltage U2 is the voltage sum of the thyristor and the capacitor;

[0050] When the thyristor is not conducting, the voltage U2 is equal to the system voltage U S , the voltage U1 is equal to the system voltage minus the capacitor residual voltage,

[0051] (1) When the residual voltage of the capacitor is less than the system voltage U S When there is a zero-crossing point...

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Abstract

This invention relates to a thyristor trigger control method for dynamic reactive compensation characterizing in collecting voltage U1 at both ends of a reversed parallel thyristor and voltage U2 at both ends of the thyristor and a capacitor to take U1 and U2 as the base to determine the throw-in time of the entire capacitor branch, in which, U1 is the voltage at both ends of the thyristor and U2 is the sum of the voltage of thethyristor and the capacitor, when the thyristor is not turned on, U2 is equal to the system voltage US, U1 is equal to the system voltage deducting the residual voltage of the capacitor, when it is smaller than the peak value of the US and U1 has over-zero point, then the point is taken as the trigger time of the thyristor.

Description

technical field [0001] The invention relates to a thyristor trigger control method and device for dynamic reactive power compensation, belonging to the field of power systems. Background technique [0002] With the continuous growth of my country's economy, the power load has increased rapidly, and the user's reactive power demand has also increased significantly. This has brought more serious problems to my country's power grid, which is already short of power. And TSF (thyristor switched filter) has a wide range of needs. The load changes more and more frequently in the distribution network, which requires TSC and TSF to be able to track and compensate the load in real time, which will cause frequent switching of the capacitor branch of the TSC and the filter branch of the TSF. If the switching time of the capacitor branch and filter branch is improper, inrush current will be generated, which will impact the system and bring harmonics, which will deteriorate the power qual...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 黄克峰卢志良傅闯毛启武黄奋权
Owner 顺特电气有限公司
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