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Active distribution network feeder line node voltage calculation based on improved superposition principle algorithm

For the error of the traditional superposition principle algorithm in calculating the voltage impact of distributed generation access on the distribution network, an improved superposition principle algorithm is proposed to compensate the problem that the error of the traditional method increases significantly near the DG installation point when the DG output is large by considering the line loss. In practice application, the traditional method or the improved method can be chosen according to the active power and power factor of DG. Additionally, the traditional method can be combined with the improved method. The improved method can be used near the DG access point and the traditional method can be used far from the DG installation point, so as to reduce the calculation error.