时间：2019年9月24日下午2:30-5:30
地点：民主楼306-1室
报告人1：廖粤峰
报告时间：下午2:30-3:10
报告标题：谐波状态空间建模方法在电力电子系统中应用
报告摘要：由于电力电子器件能够保证高效转换和对负载与电源来源高可控性，当采用复杂的控制和调制方案是可以实现系统的高动态性，这就导致越来越多基于电力电子器件的分布式发电系统的使用。然而，这些系统经常表现出不稳定的状态，尤其是对于在公共连接点上产生的谐波耦合。所以一个稳定状态和动态性能的谐波分析对于电力电子系统获得稳定操作是非常重要的一个问题。本次汇报设计出可以更准确分析电力电子系统中谐波信息的建模方法，为谐波抑制，电力电子控制技术提供良好的数据支撑。结果通过在仿真环境中得到验证，该分析对于谐波抑制及虚拟阻抗控制有指导意义。
报告人2：郭斌
报告标题：A simple and cost-effective DC current injection suppression strategy for single-phase transformerless PV grid-connected inverter.
报告时间：下午3:10-4:00
报告摘要：Due to the disparity of power modules, asymmetry of driving pulses and measurement errors of sensors, dc current injection exists in the photovoltaic (PV) grid-connected inverter systems. It may cause magnetic saturation of the power transformers and higher distortion of grid current. In light of this, this talk will explore an effective current control strategy and compensation method to suppress the dc current injection. Firstly, the root of dc current injection is comprehensively analyzed. And then, a proportional-integral-resonant (PIR) controller is proposed to eliminate the dc component caused by disparity of power modules, asymmetry of driving pulses and measurement errors of grid voltage. The injected dc current caused by grid current measurement error is estimated from the line-frequency ripple of the dc-link voltage and suppressed by a feedback compensation controller. Thus, the proposed method is developed without the need of extra hardware circuit, sensor, or precise information of system parameters so that it can be considered as a cost-effective and robust solution.
报告人3：侯小超
报告标题：Decentralized Control of Cascaded Inverters and Its Potential Applications
报告时间：下午4:00-4:40
报告摘要：This talk will explore a fully decentralized controlfor cascaded inverters. Issues like autonomous voltage balance and frequency synchronization among modules are addressed. As a result, central controller is not necessary to coordinate the balance control for individual modules. Thus, the proposed method is suitable for an arbitrary number of cascaded modules. Special focuses are paid on the operation principles of cascaded system both in stand-alone mode and grid-connected mode, and a future trend of hybrid series-parallel system is introduced.
报告人4：石书琪
报告标题：Finite Set Model Predictive Control for Reduced-switch Induction Motor Drive System
报告时间：下午4:40-5:30
报告摘要:The converter-fed induction motor (IM) drive has attracted much attention due to its advantages of low cost, simple structure, high power density, and efficiency. Thus, it has been found widespread household or industrial application in various forms. In order to decrease the costs and improve the reliability of power conversion systems, a reduced topology of induction motor drive system is presented. However, the coupling and constraints are enhanced, whichincreases control difficulty of the converter. It is difficult to control by the conventional strategies. This talk presents a hybrid predictive control strategy which combines the FS-MPC and proportional–integral (PI) control for this reduced-switch induction motor drive system. It enables the system to achieve the stable output, and can meet the high flexibility.
