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Method and system for evaluating AC filter loss

A technology of AC filter and evaluation method, applied in AC network to reduce harmonic/ripple, AC network circuit, harmonic reduction device, etc., can solve the inaccuracy of harmonic loss, complex calculation of AC filter loss, Time-consuming problems, etc., to solve the complex loss calculation, shorten the design cycle, and avoid the effect of inaccuracy

Active Publication Date: 2022-02-01
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide an evaluation method and system for AC filter loss, which can effectively solve the problems of complex calculation of AC filter loss and long time consumption, speed up the iterative speed of AC filter design, and improve the efficiency of AC filter. Design efficiency, avoiding the inaccuracy of harmonic loss calculation in the design stage

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] The present invention provides a kind of evaluation method of AC filter loss, and it comprises the following steps:

[0021] 1) Obtain the fundamental frequency current of the AC filter across the resistance according to the preset basic parameters for the AC filter;

[0022] The basic parameters for the AC filter include the AC bus voltage U connected to the AC filter, the AC system frequency f, the capacitance value of the AC filter C, the inductance value L of the AC filter, and the resistance value R of the AC filter.

[0023] 2) Obtain the fundamental frequency loss of the AC filter across the resistance through the basic parameters of the fundamental frequency current and the AC filter;

[0024] Among them, the basic parameter for the AC filter is the resistance value R of the AC filter;

[0025] Fundamental frequency loss across the re...

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Abstract

The present invention relates to an evaluation method and system for the loss of an AC filter, which includes: obtaining the fundamental frequency current of the AC filter across the resistance according to the preset basic parameters for the AC filter; According to the basic parameters of the AC filter, the fundamental frequency loss of the AC filter across the resistance is obtained; according to the number of converter stations and the number of AC filters, the initial evaluation index of the AC filter loss is obtained through the fundamental frequency loss; according to the initial evaluation index of the AC filter loss, the AC filter Evaluate device loss. The invention can effectively solve the problems of complex and time-consuming AC filter loss calculation, accelerate the iterative speed of AC filter design, improve the efficiency of AC filter design, and avoid the inaccuracy of harmonic loss calculation in the design stage.

Description

technical field [0001] The invention relates to a filter loss evaluation method and system, in particular to an evaluation method and system for an AC filter loss applied in a high-voltage direct current project. Background technique [0002] With the increasing popularity of HVDC technology, reducing design losses has gradually become the focus of designers. Reducing the design loss of the AC filter has also become a key link to reduce the design loss of the converter station. At present, the calculation method of conventional AC filter loss is complex and cumbersome. It is necessary to calculate the voltage and current of different frequencies (up to 60 times) flowing through each component. At the same time, the manufacturer needs to design the relevant equipment first and provide loss-related parameters. , although the process is fine, filter design is a process that needs to be adjusted repeatedly. If the loss calculation is carried out according to the above method fo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/01H02J2203/20Y02E40/40
Inventor 李达蔡鸿贤梁平童轶杨一鸣吴方劼祝全乐田园园尹航冮明泽程炜常赟晖郝致远贺立陈钊
Owner STATE GRID CORP OF CHINA