三次调频是电网频率调节的重要环节，火电实行的“上大压小”政策使得三次调频机组容量不足，风电并网又给电力系统频率稳定带来了一定的负面影响，尤其给三次调频的工作增加了很大的难度。通过对我国各种能源发电形式特点的分析，提出将核电引入三次调频，在阐述核电参与调频具有技术可行性和经济可行性之后，制定了以“风电分解、机组分群”为核心的三次调频控制策略。通过仿真分析得出结论：采用该控制策略，核电参与三次调频能够很好地保证风电并网情况下系统频率的稳定。%The third frequency adjustment is the key link of the grid frequency regulation. The“admission of high capacity and rejection of small capacity”policy on thermal power causes the lack of capacity of the third frequency adjustment. Wind power brings a certain impact to the frequency stability of the power system, particularly, increasing the difficulty of the third frequency adjustment. The introduction of nuclear power into the third frequency adjustment is proposed after analyzing the characteristics of the energy generation of different forms. This paper formulates the control strategy with the core of‘wind power decomposition, generator units grouping’ in the third frequency adjustment, after elaborating the technical feasibility and economic feasibility, and, comes to a conclusion that the participation of the nuclear in the third frequency adjustment would guarantee the stability of the frequency of the power system with this control strategy in the case of the introduction of wind power to the system, by simulation analysis.
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