... unobservable branches, and the observableislands in the system if any exist.< State estimation solution: Determines the optimal estimate for the system state, which is composed ... Distribution Ptanning Reference Book: Second Edition, Re-vised and Expanded, AV. Aee MW/s24. Power System State Estimation: Theory and implementation, /4///)At//* a;7Gf/4/7foA?/b Gomez ... Edition, Revised and Expanded, lAW/am /4. 7*nue22. Vehicular Electric Power Systems: Land, Sea, Air, and Space Ve-hicles, /4//'fmad/^ Me^rdadFnsan/, and Jonn M. M///erCopyright...