Status Perception Method of the Renewable Energy and Thermal Power Coupled System Based on Operation Security Region

With the rapid development of renewable energy generation technology, in future power system, the scenario of a coupled system where renewable energy and thermal power generation are integrated and coupled at point of common coupling will be widespread. The realization of the coordinated control and the effective real-time operating status evaluation of the coupled system is of great significance for ensuring the effective consumption of renewable energy in future power system with high penetration of renewable energy integration, but currently there is little research on this issue. Therefore, a status perception method of the coupled system based on operation security region is proposed in this paper. By establishing the operation security region on the two-dimensional coordinate system of active power and reactive power of renewable energy separately, the allowable proportion evaluation of active power output and the dispatchable range evaluation of reactive power of renewable energy is realized. In the end, a case study of a practical coupled system in Northeast China is given to illustrate the specific application of the proposed method.