Multilevel elicitation method dynamic planning based power system dynamic equivalent method

A dynamic programming and dynamic equivalence technology, which is applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as poor equivalence effects

Active Publication Date: 2016-05-04
STATE GRID CORP OF CHINA +2
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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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  • Multilevel elicitation method dynamic planning based power system dynamic equivalent method
  • Multilevel elicitation method dynamic planning based power system dynamic equivalent method
  • Multilevel elicitation method dynamic planning based power system dynamic equivalent method

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[0069] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0070] The power system dynamic equivalent method based on the multi-level heuristic dynamic programming algorithm proposed by the present invention is based on the coherent equivalent method, and a dynamic link based on the multi-level heuristic dynamic programming algorithm is added to the boundary bus. The voltage amplitude deviation and phase angle deviation between the coherent equivalent system and the original system boundary bus are taken as input, the output is the active power deviation between the coherent equivalent system and the original system injected into the boundary bus, and the c...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/46
CPCH02J3/00H02J3/46H02J2203/20
Inventor 杜治彭昌勇姚伟徐敬友文劲宇杨东俊苏宇
Owner STATE GRID CORP OF CHINA
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