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Analysis method for multi-feed DC interaction factors based on reduced order Jacobian matrix

A technology of interaction factor and Jacobian matrix, which is applied to AC network circuits, power transmission AC networks, electrical components, etc., can solve the complex and cumbersome analysis of analysis methods, low reliability and accuracy of multi-feed DC interaction factors, etc. problems, to achieve reasonable and accurate results

Active Publication Date: 2015-02-04
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0004] One of the purposes of the present invention is to provide an analysis method for multi-infeed DC interaction factors based on the reduced-order Jacobian matrix, to solve the complex and cumbersome analysis of the analysis methods in the prior art, and the obtained multi-infeed DC interaction The problem of low factor reliability and accuracy

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  • Analysis method for multi-feed DC interaction factors based on reduced order Jacobian matrix

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[0012] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

[0013] In order to better understand the illustrative embodiments of the present invention, the main idea of ​​the illustrative embodiments of the present invention is briefly described below.

[0014] The purpose of the present invention is to provide an improved MIIF calculation method based on the reduced-order Jacobian matrix for the deficiencies of the prior art, which is characterized in that the MIIF can be calculated directly through the system power flow distribution without changing the existing operating conditions of the syst...

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Abstract

The invention discloses an analysis method for multi-feed DC interaction factors based on reduced order Jacobian matrix, and the method comprises the steps as follows: simplifying and equivalently processing the DC- AC system to obtain the equivalent system; building the reduced order Jacobian matrix linearized model of the equivalent system; calculating multi-feed DC interaction factors through the related Jacobian matrix element. An analysis method for multi-feed DC interaction factors based on reduced order Jacobian matrix comprises the steps as follows: simplifying and equivalently processing the DC- AC system to obtain the equivalent system; building the reduced order Jacobian matrix linearized model of the equivalent system; calculating multi-feed DC interaction factors through the related Jacobian matrix element. MIIF can be calculated through Jacobian matrix related element, the existing running state of the system is not changed, the simulation experiment is avoided for calculating MIIF. The essence and impact factor for the MIIF are processed on theoretical derivation and analyzed, the former calculating method for MIIF is improved and the result is more reasonable and accurate.

Description

technical field [0001] The invention belongs to the technical field of high-voltage direct current transmission, in particular to an analysis method of multi-infeed direct current interaction factors based on a reduced-order Jacobian matrix. Background technique [0002] In AC and DC systems, the strength of the AC system grid at the receiving end is the decisive factor for system stability. In theoretical research and engineering applications, the concepts of short-circuit ratio (SCR) and effective short-circuit ratio (ESCR) are usually used to evaluate AC systems. Relative strength relationship with the DC system. With the development of DC transmission technology, a grid structure with multiple converter stations with close electrical distances appears in the power grid, that is, a multi-infeed DC system. Compared with single-circuit DC systems, the voltage interaction between converters in multi-infeed DC systems will have an impact on system strength, commutation failu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/00H02J3/36H02J3/46H02J2203/20Y02E60/60
Inventor 顾雨嘉刘天琪张爽李保宏高峰李兴源田蓓王渝红
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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