Method of generating frequency dependence network equivalence based on integral vector fitting process

A vector fitting method and frequency technology, applied in the field of power system dispatching automation and power grid simulation, can solve problems such as complex FDNE generation methods

Inactive Publication Date: 2013-05-15
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

However, compared with the node admittance matrix, the generation method of FDNE is much more complicated
At present, a method with engineering application value has not been clearly proposed, so it is very important to propose an accurate, efficient, and engineering application value of FDNE generation method

Method used

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  • Method of generating frequency dependence network equivalence based on integral vector fitting process
  • Method of generating frequency dependence network equivalence based on integral vector fitting process
  • Method of generating frequency dependence network equivalence based on integral vector fitting process

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Embodiment Construction

[0092] A kind of generation method based on the FDNE of overall vector fitting method that the present invention proposes is described in detail as follows in conjunction with accompanying drawing and embodiment:

[0093] The overall process of the method proposed by the present invention is as follows: image 3 As shown, it is characterized in that the method first uses the simplified element method to obtain the node admittance matrix of the network at different frequencies, and then uses the overall vector fitting method (improved vector fitting method) to generate FDNE. That is to generate a nodal admittance matrix with frequency as a function, the mathematical expression of N×N-dimensional FDNE is:

[0094] Y ( s ) = y 11 ( s ) ...

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Abstract

The invention relates to a method of generating frequency dependence network equivalence based on an integral vector fitting process, and belongs to the technical field of dispatching automation of electric power system and power grid emulation. The method comprises calculating a sampling value of network frequency characteristics based on a simplified model method, calculating any element of frequency dependent network equivalent (FDNE) according to the sampling value of the frequency characteristics based on a vector fitting process, and generating the FDNE by adopting the integral vector fitting process. The method of generating the frequency dependence network equivalence based on the integral vector fitting process has the advantages of being high in efficiency, accurate and practical, is convenient to achieve in a time domain, is directly applied to electromagnetic transient emulation and is satisfying in engineering practice effect.

Description

technical field [0001] The invention belongs to the technical field of power system scheduling automation and power grid simulation, and in particular relates to a method for generating frequency-dependent network equivalents based on a simplified component model method and an overall vector fitting method. Background technique [0002] Power system simulation is one of the important methods to study the transient characteristics of power system. According to the different dynamic processes under investigation, power system simulation can be divided into electromagnetic transient simulation, electromechanical transient simulation and medium and long-term dynamic simulation. Among them, the accuracy of electromagnetic transient simulation is the highest, and it is mainly used to study the microsecond-level transient process of power system network components, such as lightning process, wave process and DC commutation failure process. However, the high precision is at the cos...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 吴文传郭琦张伯明韩伟强孙宏斌胡一中余建国饶宏李鹏
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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