Method for calculating power flow of distribution network containing grid connection of new energy

Abstract

The invention relates to a method for calculating the power flow of a distribution network containing grid connection of new energy, which belongs to the field of new energy power generation and relates to calculation for the power flow of a distribution network. The method comprises the steps of 1) acquiring original data from a system node parameter table, a branch parameter table and a new energy parameter table; 2) enabling the acquired original data to be equivalent into different types of nodes according to the type of the new energy; 3) converting PV-type new energy and PI-type new energy in the step 2) into PQ-type new energy capable of being processed; 4) correcting active power and reactive power of each node in the step 2); and 5) calculating voltage of each node in the step 2) by adopting an improved forward-backward sweep algorithm, terminating the calculation if a maximum value of the voltage difference of adjacent two times of iterations of all nodes satisfies certain precision and outputting a result, otherwise, continuing the iterative calculation. The method can give consideration to grid connection of all kinds of different new energy at the same time; and the method is simple in iteration, small in number of iteration times and high in calculation efficiency.

Description

A power flow calculation method for distribution network with new energy grid-connected technical field The invention relates to a power flow calculation method of a distribution network including new energy grid-connected, belonging to the field of new energy power generation, and relates to a calculation method of a power flow of a distribution network. Background technique With the increasingly serious environmental and energy problems, new energy power generation technologies are widely developed. At present, common new energy sources include wind power generation systems, solar power generation systems, micro gas turbine power generation systems, fuel cells, etc., which have the advantages of clean environmental protection and improved power supply stability. When new energy is connected to the distribution network, the power supply mode of the distribution network will change from a single-source unidirectional power supply to a multi-source bidirectional power supply...

AI Technical Summary

Problems solved by technology

At present, there are mainly Newton-Raphson method, fast decoupling method, and forward-backward algorithm for power flow calculation algorithms of distribution network with new energy grid-connected. The first two methods will fail to converge in the power flow calculation of distribution network. However, the traditional push-back method can only deal with PQ nodes, and cannot take into account PQ, PV, and PI nodes

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