Power distribution network system topology state identification method and device, storage medium and equipment
A distribution network system and identification method technology, which is applied in the field of distribution network system topology state identification, can solve the problems of poor identification degree and high identification error rate, and achieve the effect of solving poor identification degree and reducing the possibility of misjudgment
Active Publication Date: 2019-10-01
BEIJING JIAOTONG UNIV
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[0004] In view of this, the embodiment of the present invention provides a distribution network system topology state identification method, device, storage medium and equipment to solve the problem of the poor identification of multi-topology errors in the residual-based weighted least squares state estimation method , Problems with high identification error rate
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[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.
[0030] An embodiment of the present invention provides a method for identifying the topological state of a distribution network system, such as figure 1 As shown, the method includes the following steps:
[0031] Step S101: Collect measurement data of the distribution network system, and obtain state variables, quantity measurements and branch on-off quantit...
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The invention discloses a power distribution network system topology state identification method and device, a storage medium and equipment, and the method comprises the steps: collecting the measurement data of a power distribution network system, and obtaining the state variable and measurement of the power distribution network system and the branch on-off quantity of each branch according to the measurement data; constructing a branch state function according to the branch on-off quantity; constructing an objective function according to the state variable, the quantity measurement and the branch state function; solving according to the objective function to obtain a calculation result; and judging the topological state of the power distribution network system according to a calculationresult. Through implementation of the method, on the basis of state estimation of a weighted least square method, branch on-off quantity is introduced and a corresponding branch state function is established. Meanwhile, the constructed branch state function is fused into a function with the minimum weighted sum of squares of the difference between the measurement estimation value and the measurement actual value as the target to obtain the target function, and due to the fact that the method considers the branch on-off quantity in the power distribution network system, the possibility of misjudgment when multiple topology errors exist in the system is reduced.
Description
technical field [0001] The invention relates to the technical field of distribution network, in particular to a method, device, storage medium and equipment for identifying a topological state of a distribution network system. Background technique [0002] For the smart distribution network, the primary task is to grasp the real-time operation status of the distribution network and predict the operation trend of the distribution network, which requires that the state estimation results of the distribution network must have high accuracy. However, accurate network topology is the basis of state estimation. Therefore, network topology identification is very important and is the basis for realizing various advanced applications of distribution management system (DMS). [0003] At present, the network topology identification in the distribution network adopts the weighted least squares state estimation method. The model of this method is simple and easy to solve, but it is not a...
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06375G06Q50/06
Inventor 夏明超陈奇芳刘洋李锦艺
Owner BEIJING JIAOTONG UNIV