Power distribution network simulation load flow calculation method

Abstract

A power distribution network simulation load flow calculation method relates to a simulation load flow calculation method, and aims to solve the problems that an existing simulation load flow calculation method is long in a calculation time; the method comprises the following steps: 1, reading original data of a distribution network; 2, forming a network nodal admittance matrix; 3, reading initialvoltage values of all nodes as balance node voltages, setting a node active power deviation second order item as zero, and setting a cycle variable initial value as zero; 4, calculating iteration deviation; 5, calculating voltage deviation; 6, correcting voltages of all nodes; 7, calculating the active power deviation second order item; 8, determining whether a difference between two adjacent iteration results of the active power deviation second order item is smaller than a given error or not, if yes, outputting the result, otherwise, turning to step 9; 9, determining whether the cycle variable has reached the set maximum cycle frequency N or not, if yes, outputting the result, otherwise, adding 1 on the cycle frequency and turning to step 4. The method can fast calculate the power distribution network load flow states, thus providing basic data for power distribution network short circuit calculation and stable analysis.

Description

technical field [0001] The invention relates to a simulation power flow calculation method, in particular to a distribution network simulation power flow calculation method. Background technique [0002] Distribution network power flow calculation is the basic method of distribution network simulation, which can quickly calculate the power flow state of distribution network, and provide basic data for short-circuit calculation and stability analysis of distribution network. Therefore, the distribution network simulation puts forward special requirements for the power flow calculation method, which requires high calculation accuracy, easy convergence, fast convergence speed, and less calculation time, and can handle the power flow convergence of the ill-conditioned system under the extreme operating state of the power grid. question. [0003] The distribution network generally adopts a closed-loop design and an open-loop operation. The R / X ratio in the radial distribution li...

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