Method and system for wide-range synchronization to alternating current power signals

A synchronization system, comprising:

• a processor operably connected to a memory for storing data and instructions, the processor being configured to:
• extract from the input signal, three substantially equidistant samples from a fundamental component of the input signal, the three substantially equidistant samples being taken substantially 120 degrees apart during steady-state operation;
• determine a frequency (f1), an amplitude (A1), and a phase-difference (ΦDiff) of the input signal from the three equidistant samples and a tracking signal corresponding to a steady-state of the fundamental component of the input signal characterized by a frequency (fTS) and an amplitude (ATS) with a phase-difference that is the phase angle between the tracking signal and the input signal;
• and
• generate and output frequency, amplitude, and phase-difference signals corresponding to the determined frequency (f1), amplitude (A1), and phase-difference (ΦDiff) of the input signal to one or more components of the power system,
• wherein the processor is further configured to generate a control signal for adjusting the tracking signal to match the determined frequency (f1), amplitude (A1), and phase-difference (ΦDiff) of the input signal, the synchronization system further comprising a signal generator for generating a synchronization signal from the determined frequency (f1) for output to the one or more components of the power system.

A method for use in a synchronization system having a processor operably connected to a memory for synchronizing an input signal for a power system, comprising:

• extracting from the input signal received from the power system, three substantially equidistant samples from a fundamental component of the input signal, the three substantially equidistant samples being taken substantially 120 degrees apart during steady-state operation;
• determining a frequency (f1), an amplitude (A1), and a phase-difference (ΦDiff) of the input signal from the three equidistant samples and a tracking signal corresponding to a steady-state of the fundamental component of the input signal characterized by a frequency (fTS) and an amplitude (ATS) with a phase-difference that is the phase angle between the tracking signal and the input signal;
• and
• generating and outputting frequency, amplitude, and phase-difference signals corresponding to the determined frequency (f1), amplitude (A1), and phase-difference (ΦDiff) of the input signal to one or more components of the power system,
• wherein the method has a response time in the synchronization system of two cycles or less of the fundamental component of the input signal.

A synchronization system, comprising:

• a processor operably connected to a memory for storing data and instructions, the processor being configured to:
• extract from the input signal, three substantially equidistant samples from a fundamental component of the input signal, the three substantially equidistant samples being taken substantially 120 degrees apart during steady-state operation;
• determine a frequency (f1), an amplitude (A1), and a phase-difference (ΦDiff) of the input signal from the three equidistant samples and a tracking signal corresponding to a steady-state of the fundamental component of the input signal characterized by a frequency (fTS) and an amplitude (ATS) with a phase-difference that is the phase angle between the tracking signal and the input signal;
• and
• generate and output frequency, amplitude, and phase-difference signals corresponding to the determined frequency (f1), amplitude (A1), and phase-difference (ΦDiff) of the input signal to one or more components of the power system,
• wherein the system has a response time of two cycles or less of the fundamental component of the input signal.