Quasiperiodic (QP) oscillations in electrical power systems |
| |
Authors: | SK Chakravarthy CV Nayar |
| |
Affiliation: | School of Elect and Computer Engineering, Curtin University of Technology, GPO Box U1987, Perth 6001, Western Australia |
| |
Abstract: | The occurrence of quasiperiodic (QP) oscillations in power systems, a phenomena hitherto unknown, was first experienced in the French grid when attempting to energize an unloaded transformer at the end of a long transmission line. There are no simple analytical tools available to study conditions for the occurrence of QP oscillations. In this paper, the conditions necessary for the occurrence of quasiperiodicity are shown by solving the system equations using the method of harmonic balance. It is shown that QP oscillations will occur due to the severity of magnetizing nonlinearity of the transformer core. It is also shown that if core losses are high, only frequency locked oscillations can occur. The results are confirmed by numerical solution on the original set of differential equations. |
| |
Keywords: | QP oscillation frequency locking dynamical system harmonic balance |
本文献已被 ScienceDirect 等数据库收录! |
|