低压微电网模式自适应控制策略设计  

Design of adaptive control strategy for a low voltage micro-grid mode

作　　者：李坦[1] 杨洪耕[2] 文科[2] 齐少鹏 刘建华[2] 

机构地区：[1]国网河北保定市供电公司,河北保定071051 [2]四川大学电气信息学院,成都610065 [3]中交一公局第三工程有限公司,北京101102

出　　处：《电测与仪表》2015年第17期1-5,27,共6页Electrical Measurement & Instrumentation

摘　　要：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。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 microgrid. 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 operation 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 operating 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 power grid stability.

关 键 词：低压微电网 虚拟同步发电机 孤岛模式 并网模式 稳定控制 

分 类 号：TB732[一般工业技术—真空技术]