The invention discloses a composite energy storage control system used for wind power plant power generation plan tracking. A composite energy storage power station is connected in parallel on the AC bus of a wind power plant. Battery energy storage of the composite energy storage power station is connected with a grid-connected AC/DC bidirectional converter through a battery energy storage DC/DC bidirectional converter. Flywheel energy storage of the composite energy storage power station is connected with the grid-connected AC/DC bidirectional converter through a flywheel energy storage AC/DC bidirectional converter. The grid-connected AC/DC bidirectional converter is connected with a convergence bus. The battery energy storage DC/DC bidirectional converter receives the control signal of a battery energy storage optimization controller. The flywheel energy storage AC/DC bidirectional converter receives the control signal of a flywheel energy storage controller. The composite energy storage system formed by battery energy storage and flywheel energy storage is utilized, and the composite energy storage optimization control system capable of effectively enhancing the wind power plant power generation plan tracking capacity and then reducing the adverse influence of wind power integration on the grid frequency stability can be realized under the condition of fully considering the wind power characteristics and the composite energy storage system characteristics.