Abstract: Power converter systems with high accuracy signal generation and associated methods are disclosed herein. In one embodiment, a method for controlling an inverter coupled to a grid includes receiving data representing a voltage signal of the grid, analyzing the received data in frequency domain, and extracting a fundamental frequency component from the analyzed data in frequency domain. The method can also include calculating a waveform based on the fundamental frequency component and controlling an output of the inverter based on the calculated waveform.

Abstract: The present disclosure describes systems and methods for monitoring an electrical power grid using loosely synchronized phasors. The grid can include a phasor measurement unit (PMU) that keeps a highly-accurate time, such as a time provided by GPS signals. A solar power inverter can include a clock that is synchronized to a less-accurate time, such as a time provided by a public time server or a radio time signal. The inverter can also include a PMU that generates phasors timestamped according to the less-accurate time. The inverter can receive phasors from the grid PMU. Although the grid and inverter phasors can be loosely synchronized in time, the inverter can analyze the grid and inverter phasors to determine a state of the grid. For example, the inverter can calculate a Pearson's correlation coefficient based on the grid and inverter phasors, and use the result to determine a state of the grid.

Abstract: Power converter systems with high accuracy signal generation and associated methods are disclosed herein. In one embodiment, a method for controlling an inverter coupled to a grid includes receiving data representing a voltage signal of the grid, analyzing the received data in frequency domain, and extracting a fundamental frequency component from the analyzed data in frequency domain. The method can also include calculating a waveform based on the fundamental frequency component and controlling an output of the inverter based on the calculated waveform.