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Multisource system partitioning method considering voltage stabilization

A technology of voltage stability and source system, applied in the direction of electrical components, circuit devices, AC network circuits, etc., to achieve the effect of voltage stability monitoring and control guarantee, and improve the voltage stability margin

Inactive Publication Date: 2014-12-24
TIANJIN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, in terms of multi-source systems, there is currently no voltage stability partitioning method that models multiple power sources in detail and considers multi-source output and load fluctuations.

Method used

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  • Multisource system partitioning method considering voltage stabilization
  • Multisource system partitioning method considering voltage stabilization
  • Multisource system partitioning method considering voltage stabilization

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Embodiment Construction

[0017] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Now with image 3 The shown system wiring network is taken as an example, and a kind of multi-source system partitioning method considering voltage stability proposed by the present invention is described in detail, including the following steps, and its implementation flow chart is as follows: figure 1 shown.

[0019] Step 1: Taking a certain period of time as the research object, select several time sections at the same time interval within the time period.

[0020] In the full time frame analysis of this example, the time period T as the research object is selected as 24 hours, and ΔT is taken as 1 hour, then the number of time sections extracted is m=24, and each time section T i (i=0,1,...,m-1);

[0021] Step 2: For the first time section, obtain the total load value of the time section accord...

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Abstract

The invention discloses a multisource system partitioning method considering voltage stabilization. The method includes: selecting time sections form researched time; increasing load of each node according to a system total load value of a first time section; subjecting various power sources to output increase and distribution; obtaining a system quiescent voltage stabilization critical point; performing modal analysis to obtain a node, weakest in voltage stabilization, of the time section; traversing all time sections, and taking the weak node highest in frequency of occurrence as a full-time-scale weak node; collecting time sections with solution results corresponding to the full-time-scale weak node, respectively obtaining weak areas of the time sections according to reactive voltage sensitivity relationship, and getting intersection of the obtained weak areas to form weak areas under a full time frame. The multisource system partitioning method considering voltage stabilization has the advantages that various power supply output features and load fluctuation are considered comprehensively, and voltage stability of a power system with various power sources can be improved beneficially.

Description

technical field [0001] The invention belongs to the field of power system voltage stability analysis and the field of power system planning including multiple power sources. Background technique [0002] It is of great significance to actively develop renewable energy technologies and optimize and adjust the energy structure. It has become a trend to connect multiple power sources including wind power and photovoltaic power to the grid for power generation. The study of voltage stability has also become an important branch of the study of system stability. Realizing reactive power balance of the system under rated voltage is one of the important goals of system operation and the key to maintaining system voltage stability. After new energy sources such as wind power and photovoltaics are connected to the power system, compared with the situation of a single conventional power supply connected to the system, due to the different output characteristics of the system, the syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 魏炜李佳龙曾沅
Owner TIANJIN UNIV
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