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Selection method and system of DC filter for suppressing DC side harmonic voltage

A DC filter and harmonic voltage technology, applied in the field of HVDC transmission system design, can solve problems such as poor economy, achieve simple structure, improve economy, meet the effects of insulation level control and resonance suppression

Active Publication Date: 2021-12-28
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, the selected target of the traditional method no longer meets the engineering needs, which is obviously too conservative and the economy is very poor

Method used

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  • Selection method and system of DC filter for suppressing DC side harmonic voltage
  • Selection method and system of DC filter for suppressing DC side harmonic voltage
  • Selection method and system of DC filter for suppressing DC side harmonic voltage

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0022] Such as figure 1 As shown, the selected method of the DC filter for suppressing the DC side harmonic voltage provided by the present invention comprises the following steps:

[0023] 1) Construct the harmonic source calculation model of each converter valve in the rectifier station and inverter station of the DC project, and solve the maximum harmonic value generated by each converter valve under each working condition of the DC project. Among them, construct the DC The harmonic source calculation model of each converter valve in the rectifier station and inverter station of the project can adopt the method disclosed in the prior art, so I won’t go into details ...

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Abstract

The present invention relates to a selection method and system of a DC filter for suppressing DC side harmonic voltage, which is characterized in that it includes the following content: 1) Constructing the harmonic wave of each converter valve in a rectifier station and an inverter station of a DC project Source calculation model, and get the maximum harmonic value generated by each converter valve under each working condition of the project; 2) Construct the DC system harmonic calculation model of the DC project; 3) Determine the tuning point of the DC filter; 4) Synthesize the harmonics generated by the converter valves at the sending and receiving ends of the DC project to obtain the harmonics at each point of the DC project; 5) According to the harmonic calculation model of the DC system, the tuning point of the DC filter and the harmonics of each point The sub-harmonic is aimed at obtaining the lowest total voltage peak value at the outlet of the DC pole line of the rectifier station and the inverter station, and determines the topology of the DC filter. The invention can be widely used in the field of high-voltage direct current transmission system design.

Description

technical field [0001] The invention relates to a selection method and system of a DC filter for suppressing DC side harmonic voltage, and belongs to the field of high-voltage DC transmission system design. Background technique [0002] When the high-voltage direct current transmission system is running, the harmonics generated on the transmission line will interfere with the adjacent communication lines. Early communication lines mostly use open lines, which are very susceptible to interference. Therefore, the selected target of the DC filter on the DC side is mainly to suppress The equivalent disturbance harmonic current flowing through the DC pole line and the ground pole line. If the equivalent interference harmonic current meets the communication interference limit, the overall harmonic level on the DC side can be suppressed to a certain level at the same time, and resonance can be suppressed. The selection method of this kind of DC filter has a large design margin, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/02
CPCH02J1/02
Inventor 季一鸣马为民杨一鸣乐波张涛吴方劼申笑林薛英林郝致远杜商安王尧玄张合王玲
Owner STATE GRID CORP OF CHINA
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