基于VSG_MPC的储能换流器调频控制策略  

Frequency modulation control strategy of energy storage converter based on VSG_MPC

作　　者：尹山 董建园[1] YIN Shan;DONG Jian-yuan(School of Mechanical and Electrical Engineering,Xi'an University of Architecture and Technology,Xi’an Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710055

出　　处：《电源技术》2021年第2期249-254,共6页Chinese Journal of Power Sources

基　　金：国家自然科学基金项目(51707141);陕西省工业领域重点研发计划项目(2018ZDXM-GY-040)。

摘　　要：将磷酸铁锂电池作为储能装置,通过Buck-Boost电路控制磷酸铁锂电池直流母线电压恒定。选择三相两电平的VSC换流器作为PCS的主拓扑结构,并在其数学模型下设计了VSG有功调频外环控制策略、MPC直接功率预测内环控制策略。阐明了SVPWM的原理,且为了验证控制策略的合理性,以IEEE三机九节点系统作为电网模型,从离网运行和并网运行两个方面得到了在此控制策略下储能换流器的电压电流波形与有功功率波形,并与传统的P/Q控制效果做了对比,结果表明,控制效果良好。Lithium iron phosphate battery was used as an energy storage device,and the DC bus voltage of lithium iron phosphate battery was controlled by Buck-Boost circuit.Three-phase two-level VSC converter was selected as the main topology of PCS.And in its mathematics model,VSG active FM outer control strategy and MPC direct power predictive inner-loop control strategy were designed,and the principle of SVPWM was illustrated.In order to validate the rationality of the control strategy,the system with IEEE 3-machine 9-bus as the grid model,the voltage and current waveform and active power waveform of energy storage converter were obtained under off-grid operation and grid-connected operation.The control effect was compared with the traditional P/Q control.The results show that the control effect is excellent.

关 键 词：储能装置 换流器 VSG 预测控制 离网运行 并网运行 

分 类 号：TM921.5[电气工程—电力电子与电力传动]