Reactive voltage partitioning method and system for active power distribution network

Abstract

The invention discloses a reactive voltage partitioning method and a system for an active power distribution network, and belongs to the technical field of power system automation. The method comprises the following steps of: firstly, selecting a key node from load nodes by using a comprehensive evaluation index, and constructing a key node coordinate space; then, partitioning the load nodes by using a Kohonen neural network automatic partitioning algorithm to calculate the voltage control sensitivity of a power supply node to each load node partition, and completing the partitioning of the whole active power distribution network; and finally, checking each subarea of partitioning results. According to the comprehensive evaluation index of the reactive voltage partitioning method and the system for the active power distribution network, the key node is selected from the load nodes to be more objective and comprehensive, so that the partitioning results obtained by the partitioning algorithm are more accurate, and the Kohonen neural network automatic partitioning algorithm is used for partitioning the active power distribution network; the algorithm has the characteristics of beingeasy to implement, fast in convergence, high in precision and more objective of the partitioning results.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and in particular relates to a method and system for partitioning reactive power and voltage of an active power distribution network. Background technique [0002] With the gradual depletion of fossil energy and the development of a low-carbon economy, the research and application of renewable energy generation technologies based on wind energy and solar energy have gradually increased the penetration rate of distributed renewable energy generation in the distribution network. Electrical characteristics such as power flow distribution, voltage level, and short-circuit current have a great influence on the power grid, which greatly increases the uncertainty of the distribution network and makes the voltage control problem more complicated. In order to give full play to the ability of the distribution network to accommodate renewable energy, the International Conference on Large Pow...

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Problems solved by technology

[0004] At present, most of the studies on the partitioning of the transmission network, but few studies on the partitioning of the distribution network, the main partitioning algorithms include hierarchical clustering algorithm, graph theory, fuzzy clustering method, complex network theory and other partitioning algorithms, and have been used in The division of the control area has been applied, but the above-mentioned partition method has the artificially designated number of partitions, which makes the partition results subjective and not accurate enough, or uses the comparison of partition evaluation indicators under different partition numbers to determine the optimal partition number. The process of the distribution network partition method is complicated and Not simple and efficient enough

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