A kind of tcr output current harmonic extraction system and extraction method

A technology of harmonic extraction and output current, applied in the field of electronic information, can solve the problem of TCR lack of real-time monitoring of working status

Inactive Publication Date: 2017-10-13
SUZHOU HUIKE ELECTRIC
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Problems solved by technology

[0004] The purpose of the present invention is to provide a TCR output current harmonic extraction system and extraction method used in SVC, which solves the problem of the lack of real-time monitoring of the working state of TCR used in SVC in the prior art

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  • A kind of tcr output current harmonic extraction system and extraction method
  • A kind of tcr output current harmonic extraction system and extraction method
  • A kind of tcr output current harmonic extraction system and extraction method

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Embodiment Construction

[0022] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present invention and not to limit the scope of the present invention. The implementation conditions used in the examples can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not indicated are usually the conditions in routine experiments.

[0023] Such as figure 1 As shown, the TCR output current harmonic extraction system used in SVC disclosed by the present invention includes a TCR current transformer for extracting TCR current and a grid energy-taking coil connected to the grid to supply power for the system. The TCR current transformer passes The AD converter is connected to the DSP; it also includes a power supply optical fiber used as a backup power supply when the power supply of the grid power coil is insufficient, the power supply fiber is...

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Abstract

The invention discloses a TCR output current harmonic extraction system, which includes a TCR current transformer for extracting TCR current and a power grid energy-taking coil connected to a power grid to supply power for the system. The TCR current transformer is connected to a DSP through an AD converter; Including the power supply optical fiber used as a backup power supply when the power supply of the grid power coil is insufficient. The technical scheme of the present invention constructs a brand-new rapid extraction system of each harmonic of TCR through FFT algorithm, FFT algorithm pre-storage system, harmonic selection system, backup power supply system, and equal-divided sampling method; the system can be used to control thyristors Reactor devices or other complex harmonic output systems with operating performance, working status and protection functions can be used to test static var compensation devices based on thyristor-controlled reactors to fill the EHV / UHV DC transmission and flexible In the field of AC power transmission, the test equipment and technology blank of the thyristor-controlled reactor device in the static var compensation device.

Description

technical field [0001] The invention belongs to the field of electronic information technology, and in particular relates to a method and a device for extracting fundamental waves and some important harmonics in the output current of a thyristor-controlled reactor (TCR) in a static var compensation device (SVC). Background technique [0002] Static var compensator (static var compensator, SVC) is a parallel type of reactive power compensation device. The device is mainly used to compensate the reactive power that changes frequently in the power grid, stabilize the operating parameters of the power grid, improve power factor, maintain voltage, suppress harmonics, reduce network loss and improve power grid efficiency. That is, SVC is a device used to improve power quality. Its reactive power compensation to the power grid is dynamically adjustable, with lower harmonics, higher efficiency and faster dynamic response. Thyristor controlled reactor (Thyristor controlled reactor,...

Claims

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Application Information

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IPC IPC(8): G01R23/16
Inventor 张杭王欣之张大智刘云
Owner SUZHOU HUIKE ELECTRIC
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