Towards Real Time Control of Oscillations in Electric Power Systems

电力系统振荡的实时控制

• 批准号: 9988574
• 负责人: Ian Dobson
• 金额: $ 22万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9988574&HistoricalAwards=false
• 关键词: Towards; Real; Time; Control; Oscillations

This proposal addresses the problem of effective security control of extensive, heavily loaded power systems, focusing on the study of mechanisms and precursors of widespread oscillations, and on the problems of selecting effective controls in the face of limited data. Its ultimate objective is to provide system operators with abilities to detect the imminence of potentially dangerous oscillations and to take preventive measures to avoid danger to equipment or the system. It is confined to consideration of spontaneous oscillations caused by gradual changes in system conditions, and to oscillations due to disturbances. "Forced" oscillations resulting from incomplete islanding or pulsating loads are not considered. The proposal draws heavily on the recently defined concept of "strong resonance." It is proposed that two lightly damped oscillatory modes interact near a resonance. "If linearization is not diagonizable, the resonance is called "strong;" if it is diagonizable, it is called "weak." An eigenvalue that changes in frequency before the resonance can change in damping after the resonance and become oscillatory unstable as the damping changes through zero." Thus, modal resonance is considered as a possible precursor of power system oscillations.

该建议解决了广泛的，重负荷的电力系统的有效安全控制的问题，集中在广泛的振荡的机制和前兆的研究，并在有限的数据面前选择有效的控制的问题。 其最终目标是为系统操作员提供检测潜在危险振荡的迫近并采取预防措施以避免对设备或系统造成危险的能力。 它仅限于考虑系统条件逐渐变化引起的自发振荡和扰动引起的振荡。 不考虑由不完全孤岛或脉动载荷引起的“强迫”振荡。 该提案大量借鉴了最近定义的“强共振”概念。“有人提出，两个轻阻尼振荡模式在共振附近相互作用。 如果线性化是不可对角化的，则共振称为“强”;如果是可对角化的，则称为“弱”。“共振前频率变化的本征值在共振后阻尼会变化，当阻尼变化到零时，本征值会变得振荡不稳定。因此，模态谐振被认为是电力系统振荡的可能前兆。