Frequency adjustment method for islanded virtual synchronous micro-grid
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United States of America Patent
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Nov 17, 2020
Grant Date -
Apr 16, 2020
app pub date -
Dec 15, 2019
filing date -
Apr 27, 2018
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Abstract
The present invention provides a method, a system and a storage medium for frequency adjustment of an islanded virtual synchronous micro-grid. The method includes: performing frequency adjustment on inverters in the micro-grid in a cyclic manner until the respective inverters reach rated frequencies; where each cycle includes: determining, in a differential delay manner, an inverter with a highest active output in the micro-grid as a reference unit, and sending a local output factor of the reference unit as a maximum output factor of a current cycle to other inverters; determining, for each inverter in the micro-grid, an active power adjustment amount of the inverter according to the maximum output factor, a preset rated frequency, a local output factor and an actual angular frequency of the inverter; and performing frequency adjustment on the inverter according to the active power adjustment amount.
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