Abstract：With the continuous integration of new energy generation and the increasing degree of power line

cabling，the problem of voltage exceeding limits in new type power system is becoming increasingly prominent. A

dynamic reactive power optimization model for new type power grids was established to address this issue，taking

into account both active and reactive power backflow. The objective functions were system network losses，voltage

deviations，and equipment operation costs. Introduced adaptive generation probability and cosine balance pool

strategy into different stages of the equilibrium optimizer algorithm to improve the convergence speed and accuracy

of the algorithm，and used it to solve the dynamic reactive power optimization model. Finally，simulation analysis

was conducted on an improved IEEE33 node system，and the results show that the optimization results of the

designed algorithm were superior to other algorithms，which can reduce system losses and improve the quality of

reactive power and voltage in the power grid.

      Key words：new type power system；voltage limit exceedance；improved equilibrium optimizer（IEO）algorithm；dynamic reactive power optimization