All-PMU (phase measurement unit)-orientated robust state estimation method

The invention discloses an all-PMU (phase measurement unit)-orientated robust state estimation method comprising the following steps of: initializing a network topology model and network parameters of a power system, and updating a switch measurement value and a PMU measurement value; performing topological contraction and measurement matching; identifying the range of observable nodes; performing equivalent measurement transformation; and establishing a state estimation model and solving. According to the all-PMU-orientated robust state estimation method disclosed by the invention, the convergence rate, the qualification rate and the calculation frequency of a state estimation system are remarkably improved, the maintenance workload of the state estimation system is greatly reduced, and the foundation is laid for rapid sensing, comprehensive sensing and accurate sensing for a power grid. The robust state estimation method disclosed by the invention has remarkable improvement on the aspects of calculation accuracy, calculation speed and convergence rate compared with the existing methods.