A Research On The Method Of Distortion Electrical Energy Measurement Based On The Load Wiener Functional Series Model

With the augment of power grid nonlinear electrical load, the signal distortionhas become more and more serious, power exchange between nonlinear loads and thegrid has become complicated and these situations bring many new challenges toreasonably accurate measurement of electrical energy. After analyzing power trendbetween load and grid, fundamental wave meter measuring methods based has beenproposed under the interference of harmonic wave and the imagination of accurateand reasonable measurement has come true; based on non-smooth distortion signalconditions, aiming at the distortion types of classic power grid signal, mathematicsmodels with nonlinear load electric parameters have been built respectively, And onthis basis, measurement method based on the load power flow analysis of electricenergy is put forward, but so far a universal mathematical model of grid distortionhas not existed and reasonably accurate electric energy metering method has not beengiven based on the universal mathematical model, which is proposed to solve thisissue, so the author conducted in-depth analysis and research on this issue.Firstly, using the theory of Wiener functional series to establish a universalmathematical model for nonlinear loads, including nonlinear loads obtained byGaussian white noise excitation of Wiener kernel and calculating load parametersunder sinusoidal excitation signals Wiener functional series models. Simulation anderror analysis of results showed that universal modeling of nonlinear load is able tobe obtained by application of the theory of Wiener functional series. Then, based onthe nonlinear load electric parameter Wiener Pan level series model, we use waveletdecomposition and heavy frame algorithm on current and voltage signal fordecomposition and reconfiguration, seek out current and voltage needed byfundamental component and distortion component and combines IEEE-Std1459- 2010standard defines for power trend analysis. Taking semiconductor rectifier,power locomotive and arc furnace and the they composition of composite system asexamples,we analyze power trend of Nonlinear load. Simulation results show that thepower flow based on Wiener functional series models and trend analysis based onharmonic model of typical model or results have no difference. Finally, based on thephysical definition of signal power, we propose a accurate and reasonable method ofelectric energy measurement. Simulation results show that a single and compositelinear load power flow and energy measurement simulation are in consistence withtheoretical results, distortion signal under the condition of electricity can bemeasured reasonably based on the method for power flow analysis of electric energymeasurement.