Rectangular coordinate Newton method load flow calculation method for small-impedance-branch-containing power grid based on compensation method
A technology of Cartesian coordinates and power flow calculation, which is applied to complex mathematical operations and communication networks with the same frequency from different sources. The effect of improving convergence
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[0099] Below in conjunction with accompanying drawing, the present invention is further described, according to Figure 3-4 The flow shown performs a power flow calculation for a real large power grid. The actual large grid has 445 nodes and contains a large number of small impedance branches. Among them, there are 49 small impedance branches with x≤0.001, 41 small impedance branches with x≤0.0001, and 22 small impedance branches with x≤0.00001. Among them, the smallest impedance value is the small impedance branch l between node 118 and node 125 118-125 x=0.00000001, transformation ratio k=0.9565, and k is located at the node 118 side. The convergence accuracy of the power flow calculation is 0.00001. In order to verify the convergence of the present invention to calculate the small impedance branch power system containing resistance not 0, the small impedance branch l 118-125 , l 60-122 and l 287-310 The resistor is changed to r=0.0001. Each method used sparse matrix ...
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