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Method and apparatus for mitigating sub-synchronous resonance in power transmission system

A sub-synchronous resonance and power transmission technology, which is applied in the direction of circuit devices, electrical components, AC network circuits, etc., can solve problems such as power transmission system interference, and achieve the effect of minimizing risks and avoiding interference

Inactive Publication Date: 2015-02-11
ABB TECH AG
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Problems solved by technology

Another disadvantage is that each reinsertion attempt introduces disturbances to the power delivery system

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  • Method and apparatus for mitigating sub-synchronous resonance in power transmission system
  • Method and apparatus for mitigating sub-synchronous resonance in power transmission system
  • Method and apparatus for mitigating sub-synchronous resonance in power transmission system

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Embodiment Construction

[0042] Hereinafter, the principle and content of the present invention will be described with reference to illustrative embodiments. It should be understood that the purpose of giving all the embodiments is only to enable those skilled in the art to better understand the present invention and further implement the present invention, not to limit the scope of the present invention. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield yet a further embodiment. In the interest of clarity, not all features of an actual implementation are described in the specification. Of course, it will be appreciated that in developing any such actual embodiment, many implementation-specific decisions may be made to achieve the developer's specific goals (which may vary from implementation to implementation). ), such as compliance with system-related and business-related constraints. Moreover, it can be appreciated that the devel...

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Abstract

A method and an apparatus for mitigating sub-synchronous resonance (SSR) in a power transmission system are provided. The method comprises: checking whether the SSR happens in the power transmission system (S201); checking whether the SSR is undamped (S202); providing a command to bypass a series capacitor (SC) unit when the SSR happens and is undamped (S203). In some embodiments, the method further comprises providing a command to reinsert the SC unit into the power transmission system when the transmission level of the power transmission system is determined to be higher than a predetermined level and there is no fault in the power system. The method can mitigate SSR automatically in a more efficient and effective way.

Description

technical field [0001] Embodiments of the present invention relate generally to the field of power transmission systems, and more particularly to methods and apparatus for mitigating subsynchronous resonance (SSR) in power transmission systems. Background technique [0002] In recent years, the development of wind power has become more and more prosperous all over the world. In many countries such as China and the United States, wind resources are often onshore and concentrated in areas far from load centers. Accordingly, they are also developed in a centralized mode, and the transmission of large amounts of wind energy is inevitable. Currently, there are several alternative transmission schemes, namely Ultra High Voltage (UHV) Alternating Current (AC) Transmission, Line Commutated Converter (LCC) High Voltage Direct Current (HVDC), and Voltage Source Converter (VSC) HVDC . Among these solutions, UHV AC power transmission is a relatively cheap and promising one. [0003]...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J3/002H02J3/1807Y02E40/30H02J3/241
Inventor 谢海莲李宾卡尔·海曼
Owner ABB TECH AG
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