发明申请
US20120150468A1 Method and System for Estimating and Tracking Frequency and Phase Angle of 3-Phase Power Grid Voltage Signals
审中-公开
三相电网电压信号频率和相位角的估计和跟踪方法与系统
- 专利标题： Method and System for Estimating and Tracking Frequency and Phase Angle of 3-Phase Power Grid Voltage Signals
- 专利标题（中）： 三相电网电压信号频率和相位角的估计和跟踪方法与系统
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申请号： US12967909申请日： 2010-12-14
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公开(公告)号： US20120150468A1公开(公告)日： 2012-06-14
- 发明人: Zafer Sahinoglu , Ming Sun , Koon Hoo Teo
- 申请人： Zafer Sahinoglu , Ming Sun , Koon Hoo Teo
- 主分类号： G06F19/00
- IPC分类号： G06F19/00 ; G06F17/14 ; G06F17/10
摘要：
A method estimates parameters of 3-phase voltage signals to synchronize a power grid in a presence of a voltage unbalance by transforming the 3-phase voltage signals to αβ-reference signals using a Clark transformation matrix, and estimating sinusoidal signals and corresponding quadrature signals of the αβ-reference signals using an extended Kalman filter, and determining a phase angle of a positive sequence based on a relationship of the phase angle to the estimated the sinusoidal signals.
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