A Transformation-Decoupled Estimator for Power System State Estimation

This paper presents a new decoupled power system state estmator. The decoupling is achieved via simple linear transformations on power measurements in contrast with the fast decoupled state (FDS) estimators which assume decoupling by direct negligence of the off- diagonal blocks of the Jacobian of the observation functions. The new estimator is compared with the conventional weighted least-squares (WLS) estimator and the fast decoupled state estimator against test systems ranging from 6-bus to 30-bus in size and different system loading conditions, network parameters, measurement types and redundancies.