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Slow coherency partition method considering damping influence of stator

A slow coherence and damping technology, applied to AC network circuits, electrical components, circuit devices, etc., can solve problems affecting the coherence of the unit

Active Publication Date: 2016-01-27
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide a slow coherence partition method considering the influence of stator damping, which solves the problem of affecting the coherence between the generator sets when the damping torque coefficients of the generator sets are greatly different

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  • Slow coherency partition method considering damping influence of stator
  • Slow coherency partition method considering damping influence of stator

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Embodiment Construction

[0085] In order to make the purpose of the invention, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0086] see figure 1 with figure 2 , the present invention takes the IEEE-39 node standard calculation example system as a calculation example demonstration, and the slow coherent partitioning method considering the influence of stator damping in the present invention includes the following steps:

[0087] A. Establish a linearized model of the power system

[0088] In power system modeling, the generator adopts a classical model, and the mathematical model of the power system is expressed in the form of a linearized ...

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Abstract

The invention discloses a slow coherency partition method considering a damping influence of a stator. The method comprises the following steps: step (1), establishing a linearized model of an electric power system; step (2), solving a characteristic root and a characteristic vector of a characteristic matrix K of the linearized model of the electric power system; step (3), selecting decision thresholds ep1 and ep2 and performing first partition; step (4), calculating a partition matrix L of each pre-partition and performing second partition. The slow coherency partition method considering the damping influence of the stator provided by the invention overcomes the problem of increasing space-time complexity of an algorithm when considering the damping effect of the stator, improves the accuracy of slow coherency partition and makes the calculation speed have a certain improvement.

Description

technical field [0001] The invention relates to power system simulation technology, more specifically, relates to a slow coherent partition method considering the influence of stator damping. Background technique [0002] In the process of power system simulation, the use of dynamic equivalent technology can effectively reduce the time and memory consumed by power system transient analysis and calculation. The dynamic equivalent technology can divide the external system into several subsystems and replace them with low-dimensional models while retaining the internal system; it not only requires that the initial power flow of the internal system must be kept unchanged, but also the original main components of the internal system must be preserved. dynamic features. [0003] At present, dynamic equivalence techniques can be divided into two categories: coherent equivalence method and mode equivalence method. The coherent equivalence method mainly includes two steps of cohere...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 黄冠标
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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