Title :
Power system harmonic analysis using state-estimation method for Japanese field data
Author :
Kanao, Norikazu ; Yamashita, Mitsunori ; Yanagida, Hikoni ; Mizukami, Munehisa ; Hayashi, Yasuhiro ; Matsuki, Junya
Author_Institution :
Eng. R&D Center, Hokuriku Electr. Power Co., Toyama, Japan
fDate :
4/1/2005 12:00:00 AM
Abstract :
The harmonic state-estimation (HSE) method appears to be effective but its applicability has yet been fully verified using actual data in power systems. Particularly in Japan, there has been no verification of the applicability of the method in actual power systems. In this paper, for Japanese field data synchronized with a Global Positioning System (GPS) clock, a practical method for power system harmonic analysis is proposed, which is based on HSE. In the proposed method, in order to improve the precision of HSE, uncertain parameters R, X, and Y of the transmission lines are determined from measured fundamental data, and bad measured harmonic data excluded systematically. It is also possible to estimate the error of each measurement instrument by using HSE. It is confirmed that by using only partial and selected measurement data synchronized with a GPS clock, the entire harmonic distribution of the actual power system has been obtained effectively. In this paper, field-test results of the HSE on an actual Japanese power system are shown. Furthermore, an example of harmonic analysis based on HSE in the actual power system is presented, which is prediction of harmonic voltage distribution after a change of the actual power system configuration.
Keywords :
Global Positioning System; harmonic analysis; least squares approximations; power system harmonics; power transmission lines; state estimation; synchronisation; GPS; Japanese field data; global positioning system; harmonic state-estimation method; least squares methods; power system harmonic analysis; transmission lines; Clocks; Global Positioning System; Harmonic analysis; Instruments; Power system analysis computing; Power system harmonics; Power system measurements; Power transmission lines; Synchronization; Transmission line measurements; Global positioning system; least-squares methods; measurement error; power system harmonics; state estimation;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2004.838632