Here’s a breakdown of the process: The inverter uses voltage sensors to measure the grid’s voltage level and waveform. By analyzing the grid’s voltage waveform, the inverter can determine the frequency and track any deviations. Additionally, the inverter detects the phase angle of the grid’s voltage waveform to align its output accordingly.
Take the 15kW off grid solar inverter for example. Its maximum output current is 27.4A. Under the rated voltage of 400V, the maximum output power is27.4*400*1.732=18.98kW, which can satisfy overload by 1.1 folds. When the voltage of the grid is relatively low or around 340V, then the maximum output power of the inverter is 27.4*340*1.732=16kW.
For safe and reliable integration with the electric grid, the solar inverter must precisely synchronize its AC output with the grid’s voltage, frequency, and phase characteristics. This process, known as grid synchronization, is essential for ensuring a stable power flow, preventing equipment damage, and maintaining grid stability.
When the grid voltage rises to certain level, the inverter takes the initiative toreduce the power to prevent the solar inverter from being disconnected. This, though reducing the loss of downtime, will also cause loss of certain power generation capacity. Besides, efficiency loss. When the grid voltage rises, the DC bus voltage will also rise.
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