【摘要】 由于可再生能源发电输出功率的波动性,微网在孤岛运行缺少大电网支撑,网内电压幅值、频率等相对于额定值都将有不同程度的波动与偏差,对电力用户造成极大损失。针对这种情况,提出通过对可控负荷的容量、速度等投切策略的控制来稳定微网孤岛运行时网内频率和电压幅值,利用基于Kaimal风速功率谱风速模型及风轮机有名值模型搭建了含可控负荷的微网模型,并在Matlab/Simulink工具箱中进行了微网孤岛和并网运行时可控负荷控制策略的仿真,验证了微网孤岛运行时可控负荷优异的调频性能。更多还原

【Abstract】 Due to the output power fluctuation of renewable energy sources,frequency and voltage magnitude deviated from rated value in different degree without power grid support under microgrid island operation.It is proposed to stabilize the frequency and voltage magnitude of microgrid island model by controlling the capacity and speed of controllable load,set up microgrid model with controllable load based on Kaimal wind power spectrum model & wind turbine value model.Matlab/Simulink tool is used for simulation in order to verify the effectiveness of the proposed methods.The residt of simulation proved that the proposed strategies of controlling load would make the frequency and voltage fluctuation of microgrid to an accepted limit.更多还原