Mixing-quadratic-programming-form electrical power system synthesis state estimation method

The invention discloses a mixing-quadratic-programming-form electrical power system synthesis state estimation method which can comprises the following steps that a network model is formed, a node admittance matrix and a branch-node incidence matrix are computed; a measurement vector and a state vector are converted, a middle measurement vector and a middle state vector are obtained; based on the middle measurement vector and the middle state vector, a precision linearized measurement equation is formed; based on the obtained linearized measurement equation, a mixing-quadratic-programming-form electrical power system synthesis state estimation model is provided, then CPLEX software is used for solving, an estimation value of the middle state vector is obtained, bad data, topology errors and parameter errors are identified during the process; the obtained middle state vector is subjected to inverse transformation, and voltage amplitude values of all nodes and estimation values of phase angles are obtained. The method has the advantages of being accurate, reliable and high in solving efficiency.