【摘要】 光伏电源通过逆变器并网，参与电网一次调频时将出现调整死区、较长延时等新问题。提出了一种基于典型双环控制的等效惯性控制环节，用以模拟机械惯性。将实时输出电磁功率与电磁功率平均值的差值作为控制的反馈量，在电网发生较小的功率扰动导致并网点的频率波动在一次调频控制死区范围内时，逆变器电源内部的储能元件快速吸收或释放实现对机械惯量的等效；超出死区范围后，采用传统的一次调频方式。仿真结果表明，在脉冲扰动的作用下，逆变电源的内部表征特性与电机转子的惯性表征特性相符。而发生负荷扰动时，无论一次调频环节动作与否，惯性环节都将相应地做出响应，验证了控制方法的有效性。更多还原

【Abstract】 PV power Source is connected to grid with inverter, which causes some problems such as dead zones and long delays that do not exist in mechanical inertia response, when participating in primary frequency control of power grid. An equivalent inertia loop control link based on typical dual loop control scheme is proposed simulate the mechanical inertia. The difference between the real-time output electromagnetic power and the previous average electromagnetic power is used as the feedback variable for control. When a small power disturbance occurs in power grid, causing the frequency fluctuation of the connection point to be within the dead zone of primary frequency modulation control, the energy storage element inside the inverter will quickly absorb or release some power to equivalent mechanical inertia. If exceeding the dead zone, the traditional primary frequency modulation control method is adopted. The simulation results shows that when a pulse disturbance occurs, the internal inertia characteristics of inverter power source are similar to that of a rotor. When disturbance occurs, regardless of whether the primary frequency modulation control link operates or not, the inertia link will respond correctly, and the effectiveness is also verified.更多还原