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Frequency-related network equivalence passivity correction method

A calibration method and passive technology, which can be used in CAD numerical modeling, special data processing applications, instruments, etc., and can solve problems such as taking a lot of time and not guaranteeing certain success.

Inactive Publication Date: 2017-03-22
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some of the existing FDNE passivity correction methods are very efficient but cannot guarantee a certain success; some can guarantee a certain success, but it takes a lot of time; no method that can take into account both has yet been proposed

Method used

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  • Frequency-related network equivalence passivity correction method
  • Frequency-related network equivalence passivity correction method
  • Frequency-related network equivalence passivity correction method

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Embodiment Construction

[0097] The method for frequency-dependent network equivalent passivity correction provided by the present invention includes the following steps:

[0098] (1) The mathematical model Y(s) of frequency correlation network equivalent calculated by the vector fitting method is:

[0099]

[0100] Among them, N is the dimension of Y(s), s=j2πf, f is the network frequency, j is the imaginary unit, {a i } Is the extreme point, {c i } Is a residue, d is a constant term, h is a primary term, and n is the number of poles; among the n poles, the first n 1 Are real poles, after n-n 1 N 2 For complex poles (n=n 1 +2n 2 );

[0101] (2) The mathematical model of the frequency correlation network equivalent of the above step (1) is divided into blocks, and the specific process is:

[0102] (2-1) Divide all the real pole parts, constant terms and primary terms in Y(s) into a piece of Y separately 0 (s):

[0103]

[0104] (2-2) Divide all the complex pole parts in Y(s) into n 2 Sub-block Y Ii (s), the su...

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Abstract

The invention relates to a frequency-related network equivalence passivity correction method and belongs to the technical field of power system scheduling automation and power network simulation. According to the method, a mathematic model of frequency-related network equivalence is divided into a plurality of sub-blocks, and the sub-blocks are subjected to passivity correction, so that the calculation amount of each sub-block is reduced and the method can be enabled to be very efficient by utilizing parallel computing; and when each sub-block is solved, a convex optimization model is adopted for ensuring the solving to be successful definitely. The frequency-related network equivalence passivity correction method is efficient and can ensure success; the blank in the field is made up for; and the engineering practice effect is satisfied.

Description

Technical field [0001] The invention relates to an efficient and successful frequency-related network equivalent passivity correction method, which belongs to the technical field of power system dispatching automation and power grid simulation. Background technique [0002] Power system simulation is one of the important methods to study the transient characteristics of power system. According to different dynamic processes under investigation, power system simulation can be divided into electromagnetic transient simulation, electromechanical transient simulation, and mid- and long-term dynamic simulation. Among them, electromagnetic transient simulation has the highest accuracy, which is mainly used to study the microsecond transient process of power system network components, such as lightning process, wave process and DC commutation failure process. However, high precision comes at the cost of a large amount of calculation. Due to the large amount of calculation, electromagne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2111/10
Inventor 吴文传张伯明孙宏斌胡一中郭庆来王彬
Owner TSINGHUA UNIV
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