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Active power distribution network dynamic partitioning method based on reactive power flow tracking and branch cutting

An active distribution network and power flow tracking technology, which is applied to AC network circuits, AC networks with different sources of the same frequency, electrical components, etc., can solve problems such as the inability to guarantee the rationality of partition modules, and achieve flexibility and security Stable operation and guaranteed effectiveness

Pending Publication Date: 2022-07-15
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

However, the conventional clustering method cannot guarantee the rationality of the partition module when determining the number of partitions, so the modularity function is introduced

Method used

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  • Active power distribution network dynamic partitioning method based on reactive power flow tracking and branch cutting
  • Active power distribution network dynamic partitioning method based on reactive power flow tracking and branch cutting
  • Active power distribution network dynamic partitioning method based on reactive power flow tracking and branch cutting

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Embodiment Construction

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] Most of the existing sensitivity analysis methods are based on the power flow equation, and the basic equation is the node power balance equation. The equation of state for establishing the active power and reactive power balance equations of the PQ node and the active power balance equation of the PV node is:

[0051] F(X,U,α)=0 (1)

[0052] In the formula, X is the state variable, including the voltage amplitude V of the loa...

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Abstract

The invention provides an active power distribution network dynamic partitioning method based on reactive power flow tracking and branch cutting, and the method comprises the steps: firstly, calculating the VVS of each reactive power source node to other nodes through adding a voltage reactive power output perturbation amount to a reactive power source; secondly, fuzzifying the VVS to obtain a membership matrix among the nodes, pre-partitioning the power nodes according to the membership relationship among the reactive source nodes, and preliminarily determining the dominant nodes and the number of partitions; then, determining a to-be-cut branch range based on a node power flow direction and a voltage reactive power partitioning principle; searching an optimal branch cutting point by taking the regional comprehensive coupling degree as a target function of BPSO, and determining a partitioning result; and finally, performing reactive power reserve verification on the partitioning result to obtain a final partitioning result. The VVS index provided by the invention dynamically changes along with the change of DG output and load, and the idea of'reactive power source node pre-partitioning-load node mapping partitioning 'provided by the invention ensures the effectiveness of regional voltage reactive power control.

Description

technical field [0001] The invention relates to the technical field of distribution network partitioning, in particular to an active distribution network dynamic partitioning method based on reactive power flow tracking and branch circuit cutting. Background technique [0002] The construction of a new power system with new energy as the main body is an important way to help the realization of the "dual carbon" goal. ) coordination and optimization of multi-type adjustable resources is an important problem that needs to be solved urgently. A large number of DGs are connected to the distribution network, so that the traditional distribution network has a certain ability to actively adjust, but at the same time, the control variables increase, and the convergence of centralized optimization decreases. Distributed control schemes have been shown to effectively address the shortcomings of traditional centralized voltage control methods and facilitate effective coordination betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06H02J3/50H02J3/00G06N3/00
CPCH02J3/06H02J3/50H02J3/004G06N3/006H02J2203/10H02J2203/20
Inventor 季玉琦陈雪寒范嘉乐赵琛武小鹏和萍李从善陶玉昆刘小梅庞辰洋严亚帮
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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