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Three-phase power distribution network observability analysis method based on linear circuit

A linear circuit and analysis method technology, applied in the direction of circuit device, AC network circuit, multi-phase network elimination/reduction of asymmetry, etc., can solve the problem of not considering the three-phase unbalanced measurement model and three-phase network model, not considering the distribution issues such as the impact of power

Active Publication Date: 2017-08-04
STATE GRID FUJIAN ELECTRIC POWER CO LTD +3
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Problems solved by technology

[0002] Traditional observability analysis methods mainly include topology method, numerical method, and hybrid method. Their common feature is that they all use positive sequence models, without considering the three-phase unbalanced measurement model and three-phase network model, and without considering the impact of distributed power sources on observability. analysis impact
In addition, traditional observability analysis only considers the impact of branch power and node power measurements on observability, and assumes that active and reactive power measurements occur in pairs

Method used

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  • Three-phase power distribution network observability analysis method based on linear circuit
  • Three-phase power distribution network observability analysis method based on linear circuit
  • Three-phase power distribution network observability analysis method based on linear circuit

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] This embodiment provides a method for analyzing the observability of a three-phase distribution network based on a linear circuit, such as figure 1 shown, including the following steps:

[0047] Step S1: Establish a three-phase distribution network equipment measurement model;

[0048] Step S2: Based on the rank analysis of the measured Jacobian matrix, it is judged whether the branches are observable, so as to obtain the unobservable branches in the three-phase distribution network;

[0049] Step S3: According to the analysis results of unobservable branches, an observable island of the three-phase distribution network is formed.

[0050] In this embodiment, in the step S1, a three-phase distribution network equipment measurement model is established, specifically:

[0051] When establishing the measurement modeling, a new three-phase modelin...

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Abstract

The invention relates to a three-phase power distribution network observability analysis method based on a linear circuit, and belongs to the technical field of power system dispatching automation and power grid simulation. The method comprises the steps: firstly completing the modeling of various types of measurement of a three-phase power distribution network; secondly obtaining an unobservable branch circuit in a three-phase system based on the rank analysis of a measurement Jacobi matrix; and finally obtaining an observable island of the system according to an observability analysis result of the branch circuit. The method can achieve the linear voltage measurement and power measurement of triangular connection, can achieve the processing of the impact on the observability from a distributed power supply, and can achieve the processing of the observability analysis of a power distribution transformer level.

Description

technical field [0001] The invention relates to the field of network state estimation in electric power systems, in particular to a method for analyzing the observability of a three-phase distribution network based on a linear circuit. Background technique [0002] Traditional observability analysis methods mainly include topology method, numerical method, and hybrid method. Their common feature is that they all use positive sequence models, without considering the three-phase unbalanced measurement model and three-phase network model, and without considering the impact of distributed power sources on observability. Analyze impact. In addition, traditional observability analysis only considers the impact of branch power and node power measurements on observability, and assumes that active and reactive power measurements occur in pairs. Contents of the invention [0003] In view of this, the purpose of the present invention is to provide a linear circuit-based three-phase ...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/26
CPCH02J3/00H02J3/26H02J2203/20Y02E40/50
Inventor 林毅巨云涛李荣敏雷勇张林垚
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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