A reactive power and voltage partitioning method and system for an active distribution network

Abstract

A method and system for partitioning reactive power and voltage of an active distribution network, which belong to the field of power system automation technology. The method: first select key nodes from load nodes by using comprehensive evaluation indicators, construct a coordinate space for key nodes, and then use Kohonen neural network to automatically partition The algorithm partitions the load nodes, calculates the voltage control sensitivity of the power supply node to each load node partition, completes the partition of the entire active distribution network, and finally checks each sub-region of the partition result; the comprehensive evaluation index of the present invention is from The selection of key nodes in the load nodes is more objective and comprehensive, which makes the partition results obtained by the partition algorithm more accurate, and uses the Kohonen neural network automatic partition algorithm to partition the active distribution network. The algorithm is easy to implement, fast in convergence, and high in accuracy. And the partition results are more objective.

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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