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Method based on knowledge discovery technology for stability assessment and control of electric system

A technology for power system stabilization and control methods, applied in electrical components, circuit devices, AC network circuits, etc., to achieve the effects of reducing time, improving accuracy and performance, and improving data quality

Active Publication Date: 2011-05-25
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

The current outstanding problem is how to systematically develop powerful data analysis tools to extract useful information from raw data in an accurate and timely manner in the face of such a wealth of data

Method used

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  • Method based on knowledge discovery technology for stability assessment and control of electric system
  • Method based on knowledge discovery technology for stability assessment and control of electric system
  • Method based on knowledge discovery technology for stability assessment and control of electric system

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Embodiment Construction

[0186] definition

[0187] Transient stability assessment Power system transient stability assessment belongs to the dynamic analysis of large-scale nonlinear dynamic systems. Transient stability refers to the ability of synchronous generators in an interconnected power system to maintain synchronization after severe disturbances such as short-circuit faults on transmission lines. At present, the main research methods are time-domain simulation method (or called step-by-step integration method), transient energy function method (or called direct method) and the mixed method of these two methods.

[0188] Knowledge discovery is the high-level process of identifying valid, novel, potentially useful, and ultimately understandable patterns from data. The knowledge discovery process can be divided into: problem definition, data preparation and preprocessing, knowledge discovery, and result interpretation and evaluation.

[0189] Data preprocessing Data preprocessing is to optimiz...

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Abstract

The invention provides a method for transient stability assessment and real-time control of an electric system. According to the method, technologies concerning knowledge discovery are introduced to realize the stability assessment and the control of the electric system; and on the basis of establishing a transient stability assessment model, the corresponding relation between the system running condition and the overall stability of the electric system is found out, the inherent running discipline of the electric system are grasped, and the fast assessment of the stable running state of the electric system is realized, therefore, the actual running management of the electric system can be guided. The method has the advantages that timely and effective stability control scheme can be established for the running state which loses stability after great disturbance, and the safe and the stable running of the system can be ensured at lowest price.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a power system stability evaluation and control method based on knowledge discovery technology. Background technique [0002] In the power system, the stability problem is always put in the first place, which determines whether the power system can supply power normally. In power system stability accidents, most of them are transient stability failure accidents. It is of great practical significance to study the transient stability of power system. At present, the main research methods are time-domain simulation method (or called step-by-step integration method), transient energy function method (or called direct method) and the mixed method of these two methods. [0003] The use of intelligent methods for non-model transient stability judgment of power systems has the advantages of fast online calculation speed and easy generation of decis...

Claims

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Application Information

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IPC IPC(8): H02J3/00
Inventor 于之虹施浩波田芳严剑峰
Owner CHINA ELECTRIC POWER RES INST
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