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A method for judging the stability of the DC side impedance of a flexible DC transmission system

A power transmission system, flexible DC technology, applied to AC network circuits, circuit devices, electrical components, etc., can solve problems such as inaccurate judgment of DC system stability, and achieve the effect of simple judgment methods

Active Publication Date: 2020-09-08
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, a method for judging the stability of the DC side impedance of the flexible DC power transmission system provided by the present invention solves the problem of inaccurate judgment of the stability of the DC system

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  • A method for judging the stability of the DC side impedance of a flexible DC transmission system
  • A method for judging the stability of the DC side impedance of a flexible DC transmission system
  • A method for judging the stability of the DC side impedance of a flexible DC transmission system

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Embodiment Construction

[0033] The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Such changes are obvious within the spirit and scope of the present invention as defined and determined by the appended claims, and all inventions and creations utilizing the inventive concept are within the scope of protection.

[0034] like figure 1 A two-terminal DC system is shown. When modeling the DC side impedance of the DC system, it is necessary to model the converter station A and the converter station B respectively. The modeling process is consistent for different types of converter stations. That is, when modeling the converter station, it is necessary to separate the capacitor of the converter station from the converter station, such as f...

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Abstract

The invention discloses a method for judging the stability of the DC side impedance of a flexible DC power transmission system. The invention can quickly and effectively establish a sufficiently accurate DC side impedance model of the flexible DC converter station, and accurately judge the stability of the DC side impedance of the flexible DC power transmission system based on the model. Compared with the traditional impedance model, the DC side impedance model of the present invention is simpler and clearer, and the impedance stability judgment method is simple, which creates conditions for rapid stability analysis of the flexible DC system.

Description

technical field [0001] The invention relates to the technical field of flexible direct current transmission systems, in particular to a method for judging DC side impedance stability of a flexible direct current transmission system. Background technique [0002] The flexible DC transmission system based on the voltage source converter station has developed rapidly, effectively promoting the development and utilization of new energy. However, the coupling between the capacitive voltage source converter station of the flexible DC system and the inductive power transmission system may lead to the instability of the DC system. After the inductance is used in the flexible DC system to limit the short-circuit current, the possibility of this instability will increase. The converter station structure and control system of the flexible DC system are complex. There is no corresponding solution in the industry on how to quickly and effectively establish a sufficiently accurate DC sid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 王顺亮舒稷刘天琪马俊鹏李保宏
Owner SICHUAN UNIV
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