CAJ | 학술논문

针对微电网模式切换时控制策略的变化问题，提出了一种基于虚拟同步发电机模型的模式自适应微电网控制策略，适用于微电网两种运行状态。增加了模拟低通滤波器模块和无功功率积分控制模块，满足了分布式电源在微电网两种运行状态下的运行要求。以功角，电角速度和有功功率为控制变量设计了稳定控制器，使微电网在受到负荷突变和状态转换扰动情况下仍能稳定运行。仿真和硬件实验表明该方法不仅确保了运行模式间的平滑转换，还能有效改善孤岛状态下微电网受到扰动时的频率调节效果，降低因微电网模式转换对微电网带来的冲击，有利于微电网的运行稳定。
침대미전망모식절환시공제책략적변화문제，제출료일충기우허의동보발전궤모형적모식자괄응미전망공제책략，괄용우미전망량충운행상태。증가료모의저통려파기모괴화무공공솔적분공제모괴，만족료분포식전원재미전망량충운행상태하적운행요구。이공각，전각속도화유공공솔위공제변량설계료은정공제기，사미전망재수도부하돌변화상태전환우동정황하잉능은정운행。방진화경건실험표명해방법불부학보료운행모식간적평활전환，환능유효개선고도상태하미전망수도우동시적빈솔조절효과，강저인미전망모식전환대미전망대래적충격，유리우미전망적운행은정。
In view of the change of micro-grid mode switch control strategy, this paper proposes an adaptive switching control method based on virtual synchronous generator model which is suitable for the two operation modes of micro-grid.To satisfy the requirements of distributed power in power grid operation under the two operation modes, this method adds an analog low-pass filter module and reactive power control module.In order to guarantee the stable oper-ation of the micro-grid, angular velocity and active power electric become the control variable of stability controller. Simulation and hardware experiment show that this method can not only ensure the smooth transition between the oper-ating modes, but also can effectively improve the frequency regulation effect during the disturbance on the islanded state .The strategy reduces the impact of the micro-grid pattern conversion that benefits the operation of the micro pow-er grid stability.