Analysis and Experimental Verification of New Power Flow Control for Grid-Connected Inverter with LCL Filter in Microgrid

Table 1

Brief comparison of eigenvalues.

	P-ω	Q-E
Conventional; droop	𝜆1,21=−2𝜏𝑝±1−4𝜏𝑝⋅𝑘𝑝𝑝⋅𝐺2𝜏𝑝	𝜆1,2=−1+𝑘𝑞𝑝⋅𝐻2𝜏𝑝±(1+𝐻⋅𝑘𝑞𝑝)^2−4𝜏𝑝⋅𝑘𝑞𝑖⋅𝐻2𝜏𝑝
Improved; droop	𝜆1,2=−1+𝑚𝑑⋅𝐺2𝜏𝑝±(1+𝑚𝑑⋅𝐺)^2−4𝜏𝑝⋅𝑘𝑝𝑝⋅𝐺2𝜏𝑝	𝜆1,2=−1+𝑘𝑞𝑝⋅𝐻2(𝜏𝑝+𝑛𝑑±⋅𝐻)(1+𝑘𝑞𝑝⋅𝐻)^2−4(𝜏𝑝+𝑛𝑑⋅𝐻)⋅𝑘𝑞𝑖⋅𝐻2(𝜏𝑝+𝑛𝑑⋅𝐻)