Electromechanical transient characteristic analysis method for power system based on hybrid monotonic characteristics

A technology of power system and transient characteristics, applied in the fields of electrical digital data processing, computer-aided design, special data processing applications, etc., can solve problems such as lack, and achieve the effect of increasing the difficulty of analysis

Active Publication Date: 2020-09-25
STATE GRID NINGXIA ELECTRIC POWER CO +1
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Problems solved by technology

These well-verified engineering experiences contain the inherent characteristics of power systems, but there is currently a lack of corresponding theoretical tools to explain these phenomena

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  • Electromechanical transient characteristic analysis method for power system based on hybrid monotonic characteristics
  • Electromechanical transient characteristic analysis method for power system based on hybrid monotonic characteristics
  • Electromechanical transient characteristic analysis method for power system based on hybrid monotonic characteristics

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Embodiment Construction

[0043]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] The embodiment of the present invention discloses a method for analyzing the electromechanical transient characteristics of a power system based on hybrid monotonic characteristics, such as figure 1 shown, including the following steps:

[0045] S1. Establish the power system Pure differential equation models of electromechanical transients;

[0046] S2. According to the pure differential equation model in S1, obtain the elemental analytical expressio...

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Abstract

The invention discloses an electromechanical transient characteristic analysis method for a power system based on hybrid monotonic characteristics. The electromechanical transient characteristic analysis method comprises the following steps: S1, establishing an electromechanical transient pure differential equation model of the power system; s2, according to the pure differential equation model inS1, obtaining an element analytical expression in a corresponding Jacobian matrix, analyzing symbol characteristics of the Jacobian matrix of the power system in multiple stages, and if values of non-diagonal elements of the Jacobian matrix J (x) of f (x) are kept constant and non-positive or constant and non-negative, determining that a mixed monotonic decomposition function exists; and S3, constructing a monotonous augmentation system by adopting the mixed monotonous decomposition function, estimating an uncertain power system state trajectory according to the solution of the augmentation system, and analyzing the electromechanical transient characteristics of the power system through the state trajectory. According to the method, a quantitative analysis result can be provided for the uncertainty problem, the problem that in the prior art, the power grid transient characteristic analysis difficulty is increased is solved, and a new method is provided for power system transient characteristic analysis.

Description

technical field [0001] The invention relates to the technical field of network dynamic characteristic analysis, and more specifically relates to a method for analyzing electromechanical transient characteristics of a power system based on mixed monotonic characteristics. Background technique [0002] At present, my country has built the world's largest AC-DC hybrid power grid with the highest voltage level. It is expected that in 2020, the electricity consumption of the whole society will be 6.8-7.2 trillion kWh, the national installed capacity of power generation will be 2 billion kW, and the proportion of electric energy in terminal energy consumption will reach 27%. In view of the geographical spatial dislocation between energy bases and load centers, my country has built UHV transmission and conventional transmission technology "West-East Power Transmission" transmission channels, and realized the interconnection of major regional power grids through UHV AC-DC transmissi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q50/06H02J3/02G06F111/10G06F113/04
CPCG06F30/20G06Q50/06H02J3/02G06F2111/10G06F2113/04Y02E60/00
Inventor 摆世彬甘德强田志浩陈民权孙小湘康卓然蒙金有张谦刘刚李桐
Owner STATE GRID NINGXIA ELECTRIC POWER CO
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