When renewable energy and thermal power are integrated and coupled into a power generation entity, the coupled system will be incompatible with the existing power grid dispatching system. In order to solve this problem, a state perception and prediction technology applicable to operation control of the wind-photovoltaic-thermal power cou-pled system is proposed. Firstly, according to the characteristics of the coupled system, a real-time state perception method is proposed from the three steps of "state perception data acquisition, operating state evaluation index establish-ment,and operating state division" to achieve the accurate perception of the real-time operation state of the coupled system. Then, a method for predicting the overall output of the coupled system is proposed to provide the deci-sion-making information of power control command for grid dispatching. For the cooperative control of multiple power sources in the coupled system, a modeling method for the dispatchable operation region based on multi power supply is proposed, and the prediction of the overall operation state of the coupled system is realized. The simulation results of a practical example and operation data in Northeast China show that the proposed method can be adopted to effectively re-alize the operation state perception and prediction of the wind-photovoltaic-thermal coupled system, help improve the overall operation control performance of the coupled system, and facilitate the integration into the current power grid dis-patching system.
关键词
可再生能源/耦合系统/状态感知/趋势预测/可行运行域
Key words
renewable energy/the coupled system/state perception/trend prediction/dispatchable operation region
维普
万方数据