Based on the grid-connection engineering design and practice of several regional PV(photovoltaic) power plants in He-xi area of Gansu province, a bundled grid-connection scheme with good economy, reasonability and operability is presented. In this scheme, some important problems, such as transient characteristics, dynamic reactive power compensation configuration, harmonic analysis and suppression for grid connection point, are studied by PSASP(power system analysis software package) simulation, as a result that a new connected mode with several PV power plants bundled is formed, and its benefit to similar projects as references.