A Novel Method for Parameter Identification of Distribution Network with Incomplete Observability of Node Voltages

Addressing the challenges of missing voltage measurements at non-transformer nodes in distribution network and the limitation of acquiring the measurements of voltage and current only on the secondary side of transformer nodes, this paper introduces an innovative algorithm to estimate the magnitudes of voltage and current on the primary side of transformers. Further, a novel parameter identification strategy is proposed, which incorporates the measurements of active power, reactive power, and electrical quantities at transformer nodes. The effectiveness of the proposed methods is ultimately validated through a case study conducted on the IEEE-33 bus system.