中国电机工程学报
中國電機工程學報
중국전궤공정학보
ZHONGGUO DIANJI GONGCHENG XUEBAO
2014年
16期
2721-2728
,共8页
电网信号%非平稳畸变信号%电能计量%负荷模型%泛函级数%Wiener核
電網信號%非平穩畸變信號%電能計量%負荷模型%汎函級數%Wiener覈
전망신호%비평은기변신호%전능계량%부하모형%범함급수%Wiener핵
power grid signals%non-stationary distortion signal%electric energy measurement%power load model%functions series%Wiener kernel
实际电网中常常同时存在多种平稳畸变信号和非平稳畸变信号，而目前非平稳畸变信号条件下电网信号模型主要是针对典型畸变源产生的信号建立的，缺乏符合电网实际情况、更具普遍性的电网信号的数学模型，这使得非平稳畸变信号条件下电能准确合理计量变得困难。该文在研究泛函级数理论的基础上，应用 Wiener 泛函级数建立了非平稳畸变信号条件下电网信号的通用数学模型，并以半导体整流器和电力机车这两种典型畸变源为例，通过 Matlab 仿真验证了模型的正确性。所建模型不仅可以描述任意一种畸变源产生的电网信号，而且可以描述任意几种畸变源产生的复合电网信号。该模型提高了非平稳畸变电网信号的描述精度，同时适用于平稳畸变信号，解决了畸变信号条件下电网信号统一描述的问题，为后续电能的准确合理计量提供参考。
實際電網中常常同時存在多種平穩畸變信號和非平穩畸變信號，而目前非平穩畸變信號條件下電網信號模型主要是針對典型畸變源產生的信號建立的，缺乏符閤電網實際情況、更具普遍性的電網信號的數學模型，這使得非平穩畸變信號條件下電能準確閤理計量變得睏難。該文在研究汎函級數理論的基礎上，應用 Wiener 汎函級數建立瞭非平穩畸變信號條件下電網信號的通用數學模型，併以半導體整流器和電力機車這兩種典型畸變源為例，通過 Matlab 倣真驗證瞭模型的正確性。所建模型不僅可以描述任意一種畸變源產生的電網信號，而且可以描述任意幾種畸變源產生的複閤電網信號。該模型提高瞭非平穩畸變電網信號的描述精度，同時適用于平穩畸變信號，解決瞭畸變信號條件下電網信號統一描述的問題，為後續電能的準確閤理計量提供參攷。
실제전망중상상동시존재다충평은기변신호화비평은기변신호，이목전비평은기변신호조건하전망신호모형주요시침대전형기변원산생적신호건립적，결핍부합전망실제정황、경구보편성적전망신호적수학모형，저사득비평은기변신호조건하전능준학합리계량변득곤난。해문재연구범함급수이론적기출상，응용 Wiener 범함급수건립료비평은기변신호조건하전망신호적통용수학모형，병이반도체정류기화전력궤차저량충전형기변원위례，통과 Matlab 방진험증료모형적정학성。소건모형불부가이묘술임의일충기변원산생적전망신호，이차가이묘술임의궤충기변원산생적복합전망신호。해모형제고료비평은기변전망신호적묘술정도，동시괄용우평은기변신호，해결료기변신호조건하전망신호통일묘술적문제，위후속전능적준학합리계량제공삼고。
In the actual power grid, there often exists a variety of stationary and non-stationary distortion signals at the same time. Currently under the condition of the non-stationary distortion signals, power grid models are established mainly for atypical distortion signal. Due to lack of universal models in accordance with the actual power system, it is difficult to make accurate and reasonable electrical energy measurement under the condition of non-stationary distortion signals. In this paper, based on the functional series theory, the unified model of power grid is established using Wiener functional series under the condition of non-stationary distortion signals. And it is validated by Matlab simulation with two type of typical distortion signals, semiconductor rectifier and electric locomotive. The model can not only describe the grid signal from any single source of distortion signal, but also describe the combined grid signals from multiple sources of distortion signals existing at the same time. It improves the description precision of the non-stationary distortion power grid signals, and is also applicable to stationary distortion signals. It solves the power grid uniform description problem for distortion signals and has important theoretical value and guiding significance for the subsequent accurate and reasonable measurement of electrical energy.
