Patent ID: 8170723

Claim:
A method of determining a power flow control correction for a meshed power network with two parallel flow paths and a first Power Flow Control Device (PFC) arranged to control, based on at least one of a first control parameter u 1 , e 1 , and q 1 , a power flow f 1 in a first one of the two parallel flow paths, comprising: determining a variation Δu 1 , Δe 1 , Δq 1 of the first control parameter in the first one of the two parallel flow paths; determining, in a manner timely synchronized with the determination of the variation Δu 1 , Δe 1 , Δq 1 of the first control parameter, a variation Δf i of a power flow response f i in a second one of the two parallel flow paths; calculating a power system sensitivity s i,1 based on the variation Δu 1 , Δe 1 , Δq 1 of the first control parameter and the time-synchronized variation Δf i of the power flow response in the second one of the two parallel flow paths, wherein the power system sensitivity s i,1 is calculated by means of a parameter estimation or correlation analysis technique, and wherein s i,1 is initially calculated as at least one of Δf i /Δe 1 , Δf i /Δu 1 , Δf i /Δq 1 ; and utilising the power system sensitivity to determine the power control correction of the power flow in the first one of the two parallel flow paths.