Energy-based transient stability and oscillation dynamic unified analysis method, device and system

A technology of transient stability and analysis methods, applied in the direction of instruments, data processing applications, resources, etc., can solve the problems of loss, instability, lack of effective tools for the evolution mechanism, etc.

Active Publication Date: 2019-03-19
NANJING NARI GROUP CORP +1
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Problems solved by technology

[0006] For a long time, the stability analysis of large and small disturbances has been studied in isolation, artificially breaking the integrity of the theory, making it difficult to analyze the relationship between oscillation stability and synchronous stability due to the lack of effective tools when studying the evolution mechanism of power system dynamic processes
In fact, the object of stability analysis of large and small disturbances is the same high-dimensional non-autonomous nonlinear system. The method of equilibrium point characteristic root analysis only l

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  • Energy-based transient stability and oscillation dynamic unified analysis method, device and system

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Embodiment 2

[0070] Based on the same inventive concept as embodiment 1, the embodiment of the present invention provides an energy-based unified analysis device for transient stability and oscillation dynamics, including:

[0071] The acquisition module is used to acquire the disturbed trajectory of the whole process of the system in the case of a calculation example;

[0072] The classification judgment module is used to classify and judge the transient stability of the calculation examples;

[0073] The transient stability analysis module is used to analyze the transient stability of the system using the IEEAC method when it is determined that the calculation example belongs to the uncertain class, and obtain the stability margin of the dominant image system and the dominant image system;

[0074] The first evaluation module is used for sensitivity analysis and time-varying characteristics evaluation of the system;

[0075] The macroscopic influence analysis module is used to analyze the macrosco...

Embodiment 3

[0079] Based on the same inventive concept as Embodiment 1, the embodiment of the present invention provides an energy-based unified analysis system for transient stability and oscillation dynamics, including:

[0080] A processor suitable for implementing instructions; and

[0081] The storage device is adapted to store a plurality of instructions, and the instructions are adapted to be loaded by a processor and execute the steps described in any one of Embodiment 1.

[0082] In summary:

[0083] The present invention obtains the system disturbed trajectory through numerical integration or actual measurement. The trajectory contains all the influences of time-varying nonlinear factors on the dynamic behavior of the system. From the energy point of view, the transient stability analysis method is combined with the oscillation dynamic analysis method. A unified theoretical analysis framework of power angle stability of power system is proposed, which avoids artificially isolating large...

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Abstract

The invention discloses an energy-based transient stability and oscillation dynamic unified analysis method, device and system, and the method comprises the steps: carrying out the transient stabilityanalysis of a system, and carrying out the oscillation dynamic analysis of the system. In the transient stability analysis process, an IEEAC method is adopted to carry out detailed analysis on the case conditions belonging to the uncertain classes through a power system transient stability rapid classification method; in the oscillation dynamic analysis process; analyzing oscillation characteristics of the system under different time scales based on energy viewpoints; the method comprises the following steps: firstly, analyzing the macroscopic performance of a system from the change of section energy, judging whether the local characteristics of a system oscillation dynamic process need to be analyzed in any time period according to the macroscopic performance, and finally, carrying out mechanism analysis on a specific time section needing mechanism analysis by adopting a characteristic root technology along a track. A unified analysis method is provided for large and small disturbance stability in power angle stability analysis of the power system from the perspective of energy, and manual isolation of large and small disturbance stability analysis is avoided.

Description

Technical field [0001] The invention belongs to the technical field of power systems and their automation, and specifically relates to a unified analysis method, device and system for transient stability and oscillation dynamics based on energy. Background technique [0002] The power angle stability analysis of the power system is artificially divided into large disturbance stability analysis and small disturbance stability analysis. The former is based on the complete model and the numerical integration method is used for analysis, and the latter is based on the linear model and the equilibrium point root method is used for analysis. [0003] Power system large disturbance stability analysis generally uses numerical integration to obtain system disturbance trajectory, but how to extract stability quantitative information from trajectory has always been a difficult problem. The Extension of Equivalent Area Criteria (EEAC) adopts the complementary group inertia center-relative moti...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 薛禹胜
Owner NANJING NARI GROUP CORP
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