Study on Coordinated Control Strategy of Multi-type Power generators Joint Operation to Meet Large-scale Clean Energy Integration

The integration of the large-scale clean energy to the grid leads to a scenario of multi-type power generators joint operation, however the limitation of the control capability of the clean power generators result in large-scale power generators off-grid when the power grid is seriously faulty. Based on this background, this paper proposes a multi-type power generators coordinated control strategy. Firstly, by analyzing the characteristics of different power generators, it is concluded that different operating conditions and protection parameters under the same fault conditions are the main factors affecting the disordered off-grid of clean energy. Secondly the power base set and objective function are defined, in which the power generators and geographical location characteristics are considered. Based on the grid fault traversal, the initial off-grid capacities of clean energy generators are determined, and the threshold intervals of off-grid capacities are studied under the changes of power base operating conditions and protection parameters, the coordinated control process of multi-power joint operation is proposed. Finally, the operability and effectiveness of the control and protection coordination control strategy are verified through the simulation of a real power system, which can provide a solution to reduce the disordered off-grid of clean energy.