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Title: Instrumentation Channel Error Correction and Its Effects on Protective Relays
Committee:
Dr. Sakis Meliopoulos, ECE, Chair , Advisor
Dr. Maryam Saeedifard, ECE
Dr. Gee-Kung Chang, ECE
Dr. Jinfeng Ren, Entergy
Dr. Valerie Thomas, ISyE
Abstract:
The objective of this research is to propose an on-line instrumentation channel error correction method within merging unit (MU) and to investigate its effects on protective relays. The physically-based high fidelity models of entire instrumentation channel are developed and a Dynamic State Estimation (DSE) algorithm is constructed to estimate the primary values on a sample by sample basis. The overall dynamic state estimation-based algorithm is implemented on the developed measurement model in a standard syntax referred to as Algebraic Quadratic Companion Form (SCPAQCF). The introduction of MU enables that each instrumentation channel of a MU can be designed to provide corrected primary values. Therefore, the proposed error correction method can be an integral part of MU so hat MU reports directly primary values that have been corrected, which is applicable in real-time protective relays. An alternative method to validate the estimated samples is presented via substation level dynamic state estimation. Several typical protection schemes are investigated in detail to show the effects of the proposed instrumentation channel error correction on protective relays.
