A wide-area model analysis method for power system dynamic simulation verification

Abstract

The invention relates to a fuzzy segmentation method for dynamic simulation validation of a large power system. Aiming at the problem of inaccurate dynamic simulation of the large power system and in consideration of a huge number of measurement data and model parameters of the large power system, the invention discloses a wide area pattern which represents the influence of the model parameters on a temporal and spatial dynamic characteristic of the power system; aiming at a certain type of elements of the power system, a fuzzy mapping relation between the model parameter and the temporal andspatial dynamic characteristic of the power system is obtained according to clustering analysis of the wide area pattern of the model parameter of the element on different nodes; and the model parameter of the element of the system is subjected to segmentation correction according to the degree of the mapping relation based on the measurement data, and a priority sequence of the segmentation correction is provided. In the invention, an effective method for dynamic simulation validation of the large power system is provided; and by applying the method, the dynamic simulation precision of the large power system can be improved.

Description

technical field [0001] The technical field to which the invention belongs is the field of dynamic simulation verification of power systems. Background technique [0002] Power system dynamic simulation is a basic tool for people to understand the dynamic behavior of large-scale power systems. It involves many aspects of power system planning, design, operation and control. Proposal and implementation of measures need to verify their effectiveness, and these are inseparable from power system dynamic simulation. Inaccurate dynamic simulation will cause unnecessary increase in investment in system construction or potential dangers in operation and control. [0003] Wide Area Measurement System, WAMS can provide measurement data of PMU installation nodes after the system is disturbed, such as bus voltage amplitude and phase angle, line power, generator power angle, etc. The dynamic simulation accuracy of the system becomes possible. Some practices or experiments have shown tha...

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Problems solved by technology

[0017] The purpose of the present invention is to overcome the deficiencies of traditional system-level model parameter correction methods, aiming at the problem of inaccurate large-scale power system dynamic simulation, and considering the characteristics of large-scale power system measurement data and model parameters, by defining The wide-area model that represents the influence of model parameters on the spatio-temporal dynamic characteristics of the power system. For a certain type of power system components, based on the cluster analysis of the wide-area model parameters of the component model parameters at different nodes, the relationship between the model parameters and the spatio-temporal dynamic characteristics of the power system is obtained. According to the strength of the mapping relationship, the model parameters of the component in the system are corrected in blocks based on the measurement data, and the priority order of the block correction is given; the present invention provides dynamic simulation verification for large-scale power systems An effective method is proposed, and the application of this method can improve the accuracy of dynamic simulation of large power systems

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