POWER COMPENSATION GLOBAL LINEAR SYMMETRIC METHOD FOR ACQUIRING LOAD FLOW OF DIRECT CURRENT POWER GRID

摘要

A power compensation global linear symmetric method for acquiring the load flow of a direct current power grid: on the basis of known node load parameters and node power supply parameters in a direct current power grid, establishing a power compensation global linear relationship equation of node injection power with respect to node translation voltage (101); on the basis of the power compensation global linear relationship equation and a known power balance node number, establishing a power compensation global linear symmetric model for the direct current power grid power flow (102); on the basis of the power compensation global linear symmetric model, using an M-P inverse matrix to establish a power compensation global linear symmetric matrix relationship equation of full-network node translation voltage with respect to non-power balance node injection power (103); and, on the basis of the power compensation global linear symmetric matrix relationship equation, calculating the voltage of each node and the transmission power of each branch in the direct current power grid (104). The amount of calculation is small, there are no convergence problems, and accuracy is high when the operating state of the direct current power grid changes greatly.