Improved adaptive virtual impedance control island dual machine parallel microgrid consistency

Improved adaptive virtual impedance control island dual machine parallel microgrid model based on consistency algorithm
1. Purpose: To solve the problem of reactive power output from each power generation unit being unable to be proportionally distributed due to impedance mismatch in the line, as well as the circulation problem generated between each unit2. Implementation method: Based on the concept of distributed secondary control, a distributed sparse communication network is established between each power generation unit to obtain reactive power allocation information of adjacent units. Through consistency algorithm combined with adaptive virtual impedance control, the impact of line impedance mismatch on reactive power allocation is compensated, thereby achieving accurate proportional distribution of reactive power and suppressing circulating current. This method can achieve reactive power distribution and circulating current suppression without considering line impedance.3. Optimization: Considering the influence of improved adaptive virtual impedance, the voltage and frequency in the system still deviate from the rated values. Therefore, a secondary voltage and frequency compensation control based on consistency algorithm is introduced to solve the above problems