Preprint Article Version 1 This version is not peer-reviewed

Two-Stage Linear Three-Phase State Estimation Formulation for Active Distribution Network

Version 1 : Received: 15 March 2018 / Approved: 15 March 2018 / Online: 15 March 2018 (03:59:44 CET)

How to cite: Ju, Y. Two-Stage Linear Three-Phase State Estimation Formulation for Active Distribution Network. Preprints 2018, 2018030112 (doi: 10.20944/preprints201803.0112.v1). Ju, Y. Two-Stage Linear Three-Phase State Estimation Formulation for Active Distribution Network. Preprints 2018, 2018030112 (doi: 10.20944/preprints201803.0112.v1).

Abstract

Linear state estimation (SE) formulation under a rectangular coordinate system has been proved to be applicable for real-time distribution network management. Micro phasor measurements’ model can be accommodated into this kind of SE easily. However, voltage magnitude, active power and reactive power measurements are transformed to linear measurements with large node voltage error. To cope with this issue, a linear state estimation under a polar coordinate system is adopted at the first stage to obtain accurate enough complex node voltage, and then nonlinear measurements are transformed to be linear with complex node voltage. At the second stage, linear SE under a rectangular coordinate system can be adopted to satisfy more strict network constraints. The proposed two-stage linear SE is validated on balanced 14, 33, 70,84, 119, 135 nodes network and IEEE 13, 34, 37,123 unbalanced test feeders.

Subject Areas

three-phase; active distribution network; linear network formulation; three-phase; state estimation

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