Power system dynamic equivalent error evaluation method

Abstract

The invention relates to the technical field of power system evaluation. The problem that a complete dynamic equivalent evaluation system is not established at present is solved. The invention provides a dynamic equivalent error evaluation method for a power system. Error analysis indexes of time series analysis are comprehensively and systematically introduced into effectiveness evaluation of dynamic equivalence. A finer and more accurate quantitative evaluation index system is provided and comprises a maximum error index, an average error index, a mean square error index or a root-mean-square error index, a correlation degree index and a posterior error inspection index, and an error evaluation system for confirming the effectiveness of the dynamic equivalent system is preliminarily established. Dynamic equivalence technology is advanced from an extensive experience stage to a refinement stage. The effective degree of the model can be recognized, so that a decision maker is helped toknow the reference share of the model when making a decision through the model, and meanwhile great help is provided for improving dynamic equivalence work, checking a dynamic equivalence method andthe like.

Description

technical field [0001] The invention relates to the technical field of power system evaluation, in particular to a method for evaluating dynamic equivalent error of a power system. Background technique [0002] So far, the establishment of detailed power system component models and accurate numerical simulation of the whole process is still the most reliable method for system planning and construction, operation mode analysis, dispatch management and real-time and ultra-real-time control. However, with the increasing scale of interconnected systems and more and more components in the system, it is very difficult to conduct effective and accurate simulation and analysis of such a large-scale system directly based on the simulation method of the whole process, especially for the system All components are described by detailed models, which will be difficult to achieve even in the future. Usually, people tend to be most concerned about the electrical characteristics of a certa...

AI Technical Summary

Problems solved by technology

In terms of static evaluation, it is mainly to ensure that the power flow calculation results of the equivalent system and the prototype system are consistent, including: node voltage amplitude, line transmission power, etc.; in terms of simple dynamic evaluation, it is mainly to ensure the dynamic performance of the equivalent system and the prototype system Generally, according to the swing curve of the unit, node voltage amplitude, and line transmission power, the visual method is used to observe the degree of deviation of the swing curve. This qualitative analysis method is greatly affected by the subjective factors of the observer and lacks quantitative standards.

Images