摘要
DC/AC双向接口变换器是保证交直流混合微电网可靠运行的重要装置,可维持电压稳定和平衡交直流微网之间的功率。以交流侧不平衡状况下的双向接口变换器为研究对象,建立了双向变换器的数学模型,并对功率特性进行了分析。针对双向接口变换器在交流侧不平衡情况下引起的电流畸变和功率二倍频波动的问题,采用模型预测直接功率控制与功率补偿相结合的方法,来实现交流侧电流正弦化和抑制有功功率的二倍频波动。最后在MATLAB/Simulink中搭建仿真模型,与传统的双矢量控制策略进行对比,验证了所采用控制方法的正确性和有效性。
AC/DC bidirectional converter,as an important device ensuring reliable operation of AC-DC hybrid micro-grids,can maintain voltage stability and balance power between AC/DC micro-grids.Taking the bidirectional interface converter in an unbalanced condition at the AC side as research object,a mathematical model was established for the bidirectional converter,and power characteristics were analyzed.Relative to current distortion and power double frequency fluctuation in the case of bidirectional interface converter under the condition of AC side unbalance,direct power control of model prediction was combined with power compensation to realize current sine wave and suppress double frequency fluctuation of active power at the AC side.Finally,a simulation model built in MATLAB/Simulink and comparison with the traditional dual vector control strategy verified the correctness and effectiveness of the proposed control approach.
作者
王晓兰
李显桃
Wang Xiaolan;Li Xiantao(College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China;Gansu Key Laboratory for Advanced Control of Industrial Processes, Lanzhou Gansu 730050, China)
出处
《电气自动化》
2020年第6期101-105,共5页
Electrical Automation
关键词
双向功率变换器
模型预测控制
功率补偿
双矢量控制
不平衡电网电压
bidirectional power converter
model predictive control
power compensation
dual vector control
unbalanced grid voltage
