Incremental power distribution network transfer capacity optimization method based on extended Kalman filtering

A technology of extended Kalman and optimization method, which is applied in the field of incremental distribution network transfer capacity optimization based on extended Kalman filter, can solve problems such as unsubdivided, and achieve the goal of improving transfer capacity and reducing secondary transfer Effect

A technology of extended Kalman and optimization method, which is applied in the field of incremental distribution network transfer capacity optimization based on extended Kalman filter, can solve problems such as unsubdivided, and achieve the goal of improving transfer capacity and reducing secondary transfer Effect

CN110957716APending Publication Date: 2020-04-03SHANGHAI DIANJI UNIV
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  • Incremental power distribution network transfer capacity optimization method based on extended Kalman filtering
  • Incremental power distribution network transfer capacity optimization method based on extended Kalman filtering
  • Incremental power distribution network transfer capacity optimization method based on extended Kalman filtering

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0034] The invention relates to a method for optimizing the transfer capacity of an incremental distribution network based on extended Kalman filtering. The method includes the following steps:

[0035] Step 1. Establish the model of local main transformer and feeder, and linearize the state equation and observation equation;

[0036] The state equation under the classic Kalman filter algorithm is Taylor expanded at time k-1, and the observation equation is Taylor expanded at time k, and only the first order is taken, and the other h...

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Abstract

The invention relates to an incremental power distribution network transfer capacity optimization method based on extended Kalman filtering, and the method comprises the steps: S1, building a model ofa local main transformer and a feeder line, and carrying out the linearization of a state equation and an observation equation; S2, carrying out time updating, and predicting a power posteriori estimated value and a power error at the current k moment; S3, performing observation updating, and obtaining an optimal power estimation value and a system prediction power error at the current k moment according to the power posteriori estimated value and the power error at the current k moment; and S4, carrying out k (n-1 + 1) principle inspection, if the k (n-1 + 1) principle inspection meets the requirements, outputting the current state, otherwise, changing the states of a section switch and an interconnection switch to carry out network reconstruction, re-planning a transfer path, and carrying out state output after ensuring that the transfer capability requirements are met. Compared with the prior art, the method has the advantages of being economical and reliable, improving the transfer capacity and the like.

Description

technical field [0001] The invention relates to the technical field of power transfer of incremental distribution networks, in particular to a method for optimizing power transfer capacity of incremental distribution networks based on extended Kalman filtering. Background technique [0002] With the operation of the new round of power system reform, the incremental distribution network came into being. In principle, it refers to the power grid with a voltage level of 110kV and below and the industrial park (economic development zone) with a voltage level of 220 (330) kV and below. The power grid is not under the jurisdiction of the State Grid. Although it is not a new technology, it is just a statement to cooperate with the new power reform, but the accompanying problems cannot be ignored, including: scope boundary division, external power grid dispatching, load growth forecast deviation, transfer capacity research, investment economics etc., will have a certain impact on t...

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Application Information

Patent Timeline
03 Apr 2020
Publication
CN110957716A
IPC
H02J3/00; H02J3/01
CPC
H02J3/00; H02J3/01; Y02E40/40
Inventors
δ»˜ζ™“η³; ηŽ‹ιΈΏ