Newton-Raphson and forward pushing coordinated flow algorithm for transmission and distribution network comprising distributed power supply

Abstract

The present invention discloses a Newton-Raphson and forward pushing coordinated flow algorithm for a transmission and distribution network comprising a distributed power supply. The algorithm comprises the following steps of: (1) inputting an original parameter of the transmission and distribution network; (2) initializing an amplitude and a phase angle of each node voltage; (3) setting the number of iterations of flow calculation as 1; (4) calculating a distribution network flow by using a forward pushing back substitution algorithm to obtain an impregnation power of an edge node of a distribution network; (5) calculating a transmission network flow by using a Newton-Raphson algorithm to obtain each node voltage of a transmission network; (6) determining whether a voltage difference of the edge node in each two adjacent iterations is smaller than a set convergence value, if the voltage difference is smaller than the set convergence value, then coordinating flow iteration convergence, and turning to the step (7), or turning to the step (4) to continue iteration and setting k=k+1; (7) outputting a calculating result. According to the Newton-Raphson and forward pushing coordinated flow algorithm for the transmission and distribution network comprising the distributed power supply, the Newton-Raphson algorithm and forward pushing back substitution algorithm are integrated into the coordinated flow computation, a coordinated flow solution of the transmission and distribution network comprising the distributed power supply can be accurately solved.

Description

technical field [0001] The invention relates to a cow-pull-forward coordinated power flow algorithm for a transmission and distribution network including distributed power sources, and belongs to the technical field of electric power flow calculation. Background technique [0002] The traditional power flow calculation separates the transmission network and the distribution network, and the transmission and distribution power flows are performed independently. In fact, the power system is a unified whole, and the transmission network and distribution network are interconnected and affect each other through the power network. The access of distributed power sources has changed the operating structure of the traditional distribution network with one-side power supply, and the distribution network is gradually transforming into an active network with multiple distributed power sources. In areas where distributed power is centrally connected, the distribution network will even ...

AI Technical Summary

Problems solved by technology

[0003] In the power system, the transmission network and the distribution network are two subsystems with different functional characteristics, and a unified algorithm cannot be adopted; in addition, due to the large number of equipment and nodes in the distribution network, the global power flow problem to be solved by coordinating power flow becomes more complicated. complex

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