EXPERIENCES IN THE INVESTIGATION OF HARMONIC PENETRATIONS - CASE-STUDIES

This paper discusses experiences in the analysis of harmonic penetrati ons. The discussion includes the following considerations: (1) a small linear load bus without a harmonic source is more likely to render th e voltage distortion therein the most severe; (2) the variation of lin ear loads at the harmonic source bus will lead to a change in harmonic voltages around the system; (3) multiple harmonic sources may decreas e the impact of voltage distortions; (4) there exists an optimal compe nsation to reduce harmonics for one special load pattern and network c onfiguration; improper compensation will result in severe voltage dist ortions; and (5) an improper estimation of shunt admittance at the swi ng bus will render an insignificant harmonic power flow solution. Line ar algebra is used to provide a mathematical background for interpreti ng the above phenomena. Two power systems are used to serve as samples to illustrate the numerical results. (C) 1996 Elsevier Science S.A.