Subsynchronous resonance countermeasure using phase imbalance
Subsynchronous resonance countermeasure using phase imbalance
复制标题
利用相位不平衡的次同步谐振对策
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
A. Edris
中科院分区：
文献类型：
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作者：
A. Edris
自1970年发现次同步共振（SSR）是导致内华达州南部Mohave工厂竖井失效的主要原因以来，广泛的研究和开发工作一直致力于开发有效的SSR缓解措施。本文提出了一个简单可靠的SSR缓解的新概念，为这些工作做出了贡献。其基本思想是通过削弱机电耦合来减少汽轮发电机组两侧在次同步振荡时的能量交换。这是通过在次同步振荡中产生相位不平衡来实现的。这种不平衡降低了三相电流产生相互作用的电磁转矩的能力，因此，抑制了汽轮发电机组电气和机械侧之间的能量交换。本文的目的是研究相位不平衡对发电机免受潜在扭转相互作用问题的影响。>
Since the discovery in 1970 that subsynchronous resonance (SSR) was the main cause of the shaft failures at the Mohave plant in Southern Nevada, extensive research and development efforts have been devoted to the development of effective SSR mitigation measures. This paper presents a contribution to these efforts by providing a new concept for simple and reliable SSR mitigation. The basic idea is to reduce the energy exchange between the two sides of turbine-generator sets at subsynchronous oscillations by weakening the electromechanical coupling. This is attained by creating phase imbalance at subsynchronous oscillations. The imbalance diminishes the capability of the three phase currents to develop interacting electromagnetic torques and, therefore, suppresses energy exchange between the electrical and mechanical sides of turbine-generator sets. The objective of this paper is to study the influence of having the phase imbalance associated with the generator to be protected from potential torsional interaction problems. >