Multilevel elicitation method dynamic planning based power system dynamic equivalent method

Abstract

The invention discloses a multilevel elicitation method dynamic planning based power system dynamic equivalent method, and relates to the technical field of stability analysis for a power system. According to the method, dynamic characteristics of an original complex system can be tracked by a simplified system under variable working conditions so as to accelerate the safety and stability analysis process for the power system. A homology equivalent method is adopted firstly to perform dynamic equivalence on the original system; then a multilevel elicitation method dynamic planning algorithm dynamic link is introduced into an equivalent system; the link is subjected to off-line training so as to obtain the equivalent system containing the multilevel elicitation method dynamic planning algorithm; according to the equivalent system, tracking for the dynamic characteristics of the original system can be realized under the variable working conditions, so that the equivalent system is relatively high in adaptability; the power system dynamic equivalent method has the advantages that the shortcoming of low adaptability of the existing equivalent method is overcome, the equivalent precision is greatly improved, and the effectiveness for transient stability analysis for the power system is ensured.

Description

technical field [0001] The invention belongs to the technical field of power system stability analysis, and more specifically relates to a method capable of ensuring the dynamic equivalent precision of a power system under different working conditions, different faults and different fault locations. Background technique [0002] Grid interconnection has become a trend in power system construction, and it has infinite and broad economic benefits. The interconnected power grid can take advantage of the time difference between regions to achieve peak shift energy saving. At the same time, it can also improve the reliability of power supply and reduce the reserve capacity. However, after the power grid is interconnected, the system scale is larger and the structure is more complex. Therefore, it becomes more and more difficult to analyze the safety and stability of the power grid. In order to reduce the difficulty of power grid stability calculation, fine modeling is usually o...

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Problems solved by technology

[0012] Aiming at the disadvantage that the current coherence equivalent method has poor system equivalent effects under different operating conditions, the purpose of the present invention is to provide a dynamic equivalent method for power systems, which aims to ensure that the equivalent system and The original system has dynamic characteristics with a high degree of similarity, thereby simplifying the calculation of system stability and improving the efficiency of system security and stability analysis

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