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High-speed low-harmonic controllable reactor

A reactor and low harmonic technology, applied in the field of dynamic reactive power compensation, can solve the problems of expensive high-voltage thyristors and large harmonic currents, and achieve easy expansion and redundant design, fast response, and avoidance of components cascade effect

Inactive Publication Date: 2007-06-13
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First of all, limited to the current manufacturing level of thyristor valves, when TCR is connected to a power grid with a voltage level above 6KV, devices need to be connected in series to withstand high voltage; secondly, TCR will generate large harmonic currents, so auxiliary filtering devices need to be added; Finally, HV SCRs are very expensive

Method used

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  • High-speed low-harmonic controllable reactor

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Embodiment Construction

[0012] The principle circuit diagram of the high-speed low-harmonic controllable reactor proposed by the present invention is shown in Figure 1, and consists of two parts, namely a three-phase three-winding transformer 1 and a low-voltage thyristor control reactor module group 2.

[0013] The three-phase three-winding transformer is Y / Y / Δ wiring, the high-voltage side is star-shaped wiring, and the three-phase leads are connected to the three-phase grid. There are two windings on the low-voltage side, which are star-shaped and delta-connected, and the turns ratio of the coils is , so that the line voltage of the two windings on the low-voltage side remains the same. The three-phase lead wires (6 in total) of the star and delta windings are respectively connected to the three corners of the TCR module connected in a delta.

[0014] Each module set consists of two TCR modules. Among them, one module is connected to the delta winding on the low-voltage side of the three-phase ...

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Abstract

The controlled reactor is composed of three phase three winding transformer and module of low voltage silicon controlled reactor. The said transformer is in connection of Y / Y / delta. Through leads in three phases, high voltage side in star connection is connected to three phase electric network. The said reactor in low voltage includes two pieces of TCR modules; one module is connected to delta winding at low voltage side of the transformer, and the other module is connected to star winding. Advantages are: continuously adjustable wattless power, quick response speed, without need of filtering device since very small harmonic wave within adjustment range of capacity, parallel structure easy to be expanded in capacity and to be designed in redundancy, and reduced cost.

Description

technical field [0001] The invention belongs to the technical field of dynamic reactive power compensation, and in particular provides a high-speed and low-harmonic controllable reactor. Background technique [0002] Reactive power balance is crucial to improving the economic benefits of the power grid and improving the quality of power supply. However, the formation of large ultra-high voltage power grids and the aggravation of load changes require a large number of fast-responding adjustable reactive power sources to adjust the voltage and maintain the reactive power flow balance of the system. Reduce losses and improve power supply reliability. Thyristor Controlled Reactor (hereinafter referred to as TCR, Thyristor Controlled Reactor) has been widely used in the field of dynamic reactive power control in power systems, but there are still many shortcomings. First of all, limited to the current manufacturing level of thyristor valves, when TCR is connected to a power grid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F29/00H01F27/28H02J3/18
CPCY02E40/12Y02E40/10
Inventor 尹忠东张建华肖湘宁张少军李旺陈安源
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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