Simulation method and device for decoupling of short circuit in active power distribution network

Abstract

The invention relates to a simulation method and device for decoupling a short circuit in an active power distribution network. The method comprises the following steps: calculating an increased distributed capacitance value in the active power distribution network according to a delay step length between adjacent calculation cores in active power distribution network sub-core parallel simulation, wherein the increased distributed capacitance value is connected to two ends of a short circuit in parallel; carrying out simulation calculation on a circuit between the two ends of the short circuit added with the distributed capacitance value, and carrying out electric quantity data exchange between the two ends of the simulated short circuit, so that decoupling of the short circuit in the active power distribution network is realized, and performing parallel simulation. Therefore, the inapplicability of the too short power transmission line of the power distribution network in parallel simulation of the power distribution network is overcome to a certain extent.

Description

technical field [0001] The invention relates to the field of parallel simulation of active distribution network decoupling, in particular to a simulation method and device for decoupling of short lines in an active distribution network. Background technique [0002] Due to the addition of large-scale distributed power in the active distribution network, the network structure becomes very complex and huge. The power electronic device model of the distributed power greatly limits the simulation speed of the large-scale active distribution network. In order to improve the simulation speed, it is necessary to partition and decouple the active distribution network, put different regions into separate computing cores, and perform simulation calculations at the same time, so as to realize split-core parallel simulation. At the level of decoupling methods, power transmission The Bergeron transformation of the line model realizes network decoupling. The result of the transformation i...

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Problems solved by technology

[0003] The split-core parallel simulation method of the distribution network is to decouple the originally coupled systems. The calculation results of each calculation core need to be exchanged and transmitted according to the uniform calculation step size, so as to ensure the convergence of the simulation results, and the power line carrier is generally used in the distribution network. The communication method, so the medium for exchanging and transmitting calculation result information is the transmission line. In order to ensure that each calculation core can be given sufficient calculation completion time, the line length should not be too short, and there will be a certain line length requirement. In the distribution network, the transmission line is generally short, generally 6-20km. If the calculation step size Δt of each calculation core is too short, it may occur that the calculation result of the previous calculation core will be in the next calculation due to the short transmission line. The exchange and transfer of information begins before the core calculation results are obtained, which may lead to serious consequences of reduced simulation accuracy or even divergent results

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