A Harmonic Analysis System Based on Parameter Estimation

Abstract

The invention provides a parameter-estimation-based harmonic wave analyzing system which belongs to the harmonic wave analyzing technology field and comprises branch channels, a multi-channel comprehensive determining module, a saving module and a displaying module. Each group of the branch channels is provided with a data source module, a sequence generator and a parameter estimation module. The signal output ends of the parameter estimation modules of each group of branch channels are connected with the signal input end of the multi-channel comprehensive determining module respectively. According to the invention, a parameter estimation theory is introduced so as to obtain the equivalent impedance and equivalent harmonic electromotive force key information of a power grid harmonic wave. As the traditional manual intervention analysis becomes intelligent assistance, the analyzing efficiency is increased; and the harmonic wave analysis becomes more discrete. The system of the invention also provides diversified input and output formats; the input in the offline analyzing work mode can be historical data; and the input in the online analyzing work mode can be real time measured data. The system can be applied to various occasions flexibly.

Description

technical field [0001] The invention belongs to the technical field of harmonic analysis. Background technique [0002] With the vigorous development of the market economy and the improvement of productivity, the demand for electricity is increasing, followed by a large number of non-linear loads and new energy power generation equipment connected to the grid, resulting in more and more harmonic pollution problems in the power system. The more serious it is, it will directly affect the stability of the power grid and the safe life of the equipment. [0003] For this reason, more and more harmonic analysis has been carried out in the power system, but the traditional harmonic analysis system only stays at the stage of generating routine reports, and cannot obtain the equivalent electromotive force and equivalent impedance of the harmonic source through automatic analysis. feature information, and after obtaining the measured historical data, a large amount of manual interven...

AI Technical Summary

Problems solved by technology

Due to the backwardness of the traditional harmonic analysis concept and the inefficiency of the system algorithm, the efficiency and accuracy of the harmonic analysis of the power system have been increasingly affected, and the original harmonic analysis system has a large number of invalid analyzes and even misanalyses due to the backward concept The phenomenon

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