A Digital Current Control Technique for Grid-Connected AC/DC Converters Used for Energy Storage Systems

被引:50
作者
Eren, Suzan [1 ]
Pahlevani, Majid [1 ]
Bakhshai, Alireza [1 ]
Jain, Praveen [1 ]
机构
[1] Queens Univ, Dept ePOWER Elect & Comp Engn, Kingston, ON K7L 3N6, Canada
关键词
AC/DC converter; adaptive control; bidirectional converter; energy storage systems (ESS); fast manifold; grid-connected converter; hybrid renewable energy systems; micro/nano-grid; nonlinear control; slow manifold; smart grid; VOLTAGE-SOURCE INVERTER; DESIGN; IMPLEMENTATION; REGULATOR; FILTER;
D O I
10.1109/TPEL.2016.2582901
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];
摘要
This paper presents an advanced current controller for grid-connected bidirectional ac/dc converters used for energy storage systems (ESSs). The proposed control scheme is designed to incorporate both the time-domain and frequency-domain dynamics to achieve superior transient and steady-state performance. The advanced current controller can overcome the various challenges faced by the conventional current controllers used in this application, which lead to sluggish transients and steady-state errors when tracking the sinusoidal reference for the grid current. Combining the time-domain dynamics with the frequency-domain dynamics creates a more intelligent controller compared to existing-methods, which only consider the dynamics of one domain. The proposed controller is able to eliminate steady-state error by adaptively changing the controller coefficients in the frequency domain according to the current error. In the time domain, the control scheme minimizes the derivative of a defined energy function in order to optimize the transient performance. Simulation and experimental results obtained from a 3.3-kW grid-connected ac/dc converter demonstrate its superior performance.
引用
收藏
页码:3970 / 3988
页数:19
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