With the rapid development of interconnected power systems

the reactive power coupling among different regional power networks becomes stronger

and the problem of coordinating multi-area voltage control is more prominent. In order to solve the problem of the coordination and conflict among multiple control subjects

dynamic game theory is introduced. The multi-area voltage cooperative control model based on dynamic game theory is established as the non-zero

non-cooperation

and non-linear quadratic game type. A two-layer iterative algorithm based on primal-dual interior point method is utilized to obtain the Nash equilibrium solution. And the decentralized coordinated calculation of all areas with limited information exchange is realized by using Ward equivalent method. The results in New England 10-unit 39-bus power system verify the effectiveness and superiority of the proposed voltage cooperative control method. This work is supported by National Natural Science Foundation of China(No. 51177049).