In order to solve the problem of signal missing in heterogeneous model in power system dispatching and operation simulation mirror system, the technical characteristics of data mapping of the heterogeneous model are researched in this paper. And the reason for remote measurement and remote signal missing during the data mapping is also analyzed. Aiming at the sitations of remote signal missing, remote measurement missing for a single branch of a bus node or power grid loop, the data complement methods based on logic derivation including network topology searching, nodal power balance equations and branch loop power equations are addressed. Aiming at the complex siuation of multi-branch data missing, a new data complement method of the weighted least absolute value state estimation based on the independent branch loop power equations and bus node balance equations is proposed. This method has already been applied to the power system dispatching and operation simulation mirror system of CSG.