Method and device for assessing sub-synchronous resonance

A sub-synchronous resonance, machine-network technology, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problem of not considering the actual damping characteristics of the machine-network system, not comprehensively considering electrical damping and mechanical damping, and not being able to accurately evaluate the secondary Problems such as synchronous resonance
CN101895117BInactive Publication Date: 2012-07-25南方电网技术研究中心 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
南方电网技术研究中心
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and a device for assessing sub-synchronous resonance, and belongs to the technical field of stability analysis of a power system. The method comprises the following steps of: acquiring electric damping and mechanical damping of a machine screen system; acquiring total damping of the machine screen system according to the electric damping and the mechanical dampingof the machine screen system; and assessing the sub-synchronous resonance of the machine screen system according to the total damping of the machine screen system. The device comprises a first acquisition module, a second acquisition module and an assessment module. The method and the device can comprehensively and accurately assess the sub-synchronous resonance of the machine screen system by acquiring the total damping according to the electric damping and the mechanical damping of the machine screen system and assessing the sub-synchronous resonance of the machine screen system according to the total damping.
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Description

technical field

[0001] The invention relates to the technical field of power system stability analysis, in particular to an evaluation method and device for subsynchronous resonance. Background technique

[0002] In the ultra-high voltage transmission system, the use of series compensation (referred to as series compensation) transmission system is an effective method to increase the long-distance transmission capacity and improve the stability of the transmission system. However, when the electrical resonance frequency of the series-compensated transmission network is close to complementary to the mechanical torsional vibration frequency of the generator shafting, it may lead to under-damping or negative damping of the torsional vibration of the generator shafting, resulting in a series-compensated transmission system and a generator. Sub-synchronous resonance (SSR) occurs in the machine-network system. When the sub-synchronous resonance is severe, the generator shaft will ...

Claims

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