Control method, system and terminal equipment for blocking harmonic oscillation of direct current transmission

A technology of DC transmission system and harmonic oscillation, applied in AC network to reduce harmonics/ripple, harmonic reduction device, AC network circuit, etc. Good effect and low cost effect

Active Publication Date: 2022-04-29
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a control method, system and terminal equipment for blocking harmonic oscillation of direct current transmission, which are used to solve the technical problem of harmonic oscillation caused by loop resonance and external harmonic disturbance in existing direct current transmission

Method used

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  • Control method, system and terminal equipment for blocking harmonic oscillation of direct current transmission
  • Control method, system and terminal equipment for blocking harmonic oscillation of direct current transmission
  • Control method, system and terminal equipment for blocking harmonic oscillation of direct current transmission

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Embodiment 1

[0041] figure 1 It is a flow chart of the steps of the control method for blocking DC transmission harmonic oscillation described in the embodiment of the present invention, figure 2 It is a frame diagram of a device for eliminating harmonic components in the control method for blocking harmonic oscillation of DC power transmission described in the embodiment of the present invention.

[0042] like figure 1 and figure 2As shown, the embodiment of the present invention provides a control method for blocking harmonic oscillation of DC power transmission, which is applied to the DC power transmission system. The DC power transmission system is provided with a feedback control loop and a PI controller, and the DC power transmission system is also provided with a The device for eliminating harmonic components, the device for eliminating harmonic components is located between the feedback control loop and the PI controller, and the control method for blocking harmonic oscillatio...

Embodiment 2

[0065] Figure 4 It is a frame diagram of a control system for blocking harmonic oscillation of direct current transmission described in an embodiment of the present invention.

[0066] like Figure 4 As shown, the embodiment of the present invention also provides a control system for blocking harmonic oscillation of DC power transmission, which is applied to the DC power transmission system. The DC power transmission system is provided with a feedback control loop and a PI controller, and the DC power transmission system is also provided with a The device for eliminating harmonic components, the device for eliminating harmonic components is located between the feedback control loop and the PI controller, the control system for blocking harmonic oscillation of DC power transmission includes an input unit 10, a harmonic component eliminating unit 20 and an output unit 30;

[0067] The input unit 10 is used to input the first electrical quantity output by the feedback control l...

Embodiment 3

[0074] An embodiment of the present invention also provides a computer-readable storage medium, which is used to store computer instructions, and when the computer is run on the computer, the computer executes the above-mentioned control method for blocking harmonic oscillation of DC power transmission.

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Abstract

Embodiments of the present invention relate to a control method, system and terminal equipment for blocking harmonic oscillation of direct current transmission, which are applied to direct current transmission systems. The direct current transmission system is provided with a feedback control loop and a PI controller. The direct current transmission The system is also provided with a device for eliminating harmonic components, and the device for eliminating harmonic components is located between the feedback control loop and the PI controller. By adding a harmonic component elimination device between the feedback control loop of the DC power transmission system and the PI controller, the harmonic component elimination device eliminates the harmonic component in the first electrical quantity output by the feedback control loop, and realizes blocking the harmonic component in the DC power transmission system The transmission of harmonic components in the control of the converter, the control method for blocking the harmonic oscillation of DC transmission has the advantages of simple structure, good suppression effect, low cost, etc., and solves the problems caused by loop resonance and external harmonic disturbance in the existing DC transmission Technical problems caused by harmonic oscillation.

Description

technical field [0001] The present invention relates to the technical field of direct current transmission harmonics, in particular to a control method, system and terminal equipment for blocking harmonic oscillation of direct current transmission. Background technique [0002] At present, during the operation of the power system, the modulation effect of the DC transmission converter on the AC and DC voltage and current may lead to the occurrence of harmonic instability. The AC bus voltage of the flow station is severely distorted. [0003] Internationally, the harmonic instability problems of conventional DC transmission systems are divided into harmonic instability caused by trigger control, current loop control instability, iron core saturation instability, AC-DC harmonic interaction, etc. The harmonic instability caused by trigger control is usually related to the trigger control method. The traditional DC transmission system is controlled by phase trigger mode, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/36
CPCH02J3/01H02J3/36H02J2003/365Y02E40/40Y02E60/60
Inventor 罗超郭琦林雪华邓丽君李书勇黄立滨
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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