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What Is Droop Control?

The so-called droop control is to select the frequency droop characteristic curve (Droop Character) similar to the traditional generator as the micro-source control method, that is, to obtain stable frequency and voltage through P/f droop control and Q/V droop control respectively. The control method separately controls the active power and reactive power of the micro-source output in the micro-grid, without the communication coordination between the gensets, realizes the goal of micro-source plug-and-play and peer-to-peer control, and ensures the unity of power balance and frequency in the micro-grid under the island, which has the characteristics of simplicity and reliability. Using the frequency active droop characteristic (Droop Character), the unbalanced power of the system is dynamically allocated to each unit to ensure the uniformity of the frequency and voltage in the micro-grid system, which is simple and reliable. The droop control adopts voltage and current double loo...