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Thyratron throw-over capacitor group compensating equipment

A technology of thyristor switching and switching capacitors, which is applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., and can solve problems such as trigger circuit and controller complexity

Inactive Publication Date: 2005-10-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the TSC device, the thyristor is the most expensive part, and the corresponding trigger circuit and controller are the most complicated parts

Method used

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  • Thyratron throw-over capacitor group compensating equipment
  • Thyratron throw-over capacitor group compensating equipment
  • Thyratron throw-over capacitor group compensating equipment

Examples

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Embodiment Construction

[0041] Such as figure 2 (e) shows the main circuit structure of the present invention. Ignoring the current-limiting inductance in the circuit, the working mechanism of the main circuit structure of the present invention is explained as follows:

[0042] Assume that the phase voltages Ua, Ub, and Uc of the system are positive sequence, and the voltage on the capacitors C1, C2, and C3 is 0. Before the thyristor is triggered to work, due to the single-phase conductivity of the diode, the circuit realizes the pre-charging of the two-phase capacitors C1 and C2 through the diodes D1 and D2. The capacitor C1 is charged to the positive peak of the negative line voltage Uca, and the capacitor C2 is charged to the positive peak. The positive peak of the line voltage Ubc, the voltage on the capacitor C3 is 0. The voltage between the anode and cathode of the thyristor VT1 is equal to -UC1+UC2+Uab. The maximum voltage is three times the peak line voltage, which is about one-third highe...

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Abstract

The thyristor switch capacitor group compensation equipment belongs to the field of reactive-load compensation equipment of power system, and is characterized by that it is a "1T+2D" type star-point compensation equipment, its switched capacitor group is connected into a star circuit, said star point type uses a thyristor and two power diodes to form a delta-connected electronic switch.

Description

technical field [0001] The invention relates to a thyristor switching capacitor group compensation device, which belongs to the technical field of reactive power compensation in power systems. Background technique [0002] With the rapid development of modern power system and power electronic technology, static var compensator, as an advanced and important reactive power compensation equipment, has been widely used in the world. By rapidly and continuously controlling the reactive power of the power system, the static var compensation device has the functions of reducing loss and saving energy, stabilizing system voltage, and improving power quality. As an important member, thyristor switch capacitors (TSC for short) play an important role in the field of reactive power compensation in power systems due to its mature technology and high cost performance. [0003] Since transmission lines and loads are mostly inductive, reactive power compensation generally requires capaciti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 陈建业杨建宁韩业辉
Owner TSINGHUA UNIV