Enhancement of DC‐bus voltage regulation in cascaded converter system by a new sensorless load current feedforward control scheme

2021 ◽  
Author(s):  
Majid Ali ◽  
Muhammad Yaqoob ◽  
Lingling Cao ◽  
Ka‐Hong Loo
Keyword(s):  
Feedforward Control ◽  
Voltage Regulation ◽  
Load Current ◽  
Control Scheme ◽  
Cascaded Converter ◽  
Dc Bus ◽  
Bus Voltage ◽  
Load Current Feedforward

Application of SCES in Improving Dynamic Response of DC Microgrid Bus Voltage

2014 ◽  
Vol 521 ◽  
pp. 431-434
Author(s):  
Yuan Sheng Xiong ◽  
Jian Ming Xu
Keyword(s):  
Dynamic Response ◽  
Feedforward Control ◽  
Dc Microgrid ◽  
Wide Range ◽  
Supercapacitor Energy Storage ◽  
Response Performance ◽  
Dc Bus ◽  
Bus Voltage ◽  
The Stability ◽  
The Impact

To improve the stability of DC bus voltage in DC microgrid, and reduce the impact on microgrid equipments by the DC bus voltage fluctuations, a supercapacitor energy storage (SCES) is designed to connect to the DC bus by the bi-directional converter. The controller is designed by the feedforward control and proportional method with the deadband. The great load disturbance is simulated in PSIM software when the DC microgrid operates in the grid-connected rectification mode. The simulation results show that SCES under the proposed control strategy can reduce the fluctuation range of the DC bus voltage in a wide range of load disturbances, and the dynamic response performance of DC bus voltage is improved.

scholarly journals Improved Dynamic Voltage Regulation in a Droop Controlled DC Nanogrid Employing Independently Controlled Battery and Supercapacitor Units

2018 ◽  
Vol 8 (9) ◽  
pp. 1525
Author(s):  
Ahmad M. A. Malkawi ◽  
Luiz A. C. Lopes
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Voltage Regulation ◽  
Potential Contribution ◽  
Pass Filter ◽  
Power Sources ◽  
Dynamic Voltage ◽  
Dc Bus ◽  
Bus Voltage ◽  
The Impact

DC bus voltage signaling (DBS) and droop control are frequently employed in DC nano and microgrids with distributed energy resources (DERs) operating in a decentralized way. This approach is effective in enforcing the desired contributions of power sources and energy storage systems (ESSs) in steady-state conditions. The use of supercapacitors (SCs) along with batteries in a hybrid energy storage system (HESS) can mitigate the impact of high and fast current variations on the losses and lifetime of the battery units. However, by controlling the HESS as a single unit, one forfeits the potential contribution of the SC and its high power capabilities to dynamically improve voltage regulation in a DC nanogrid. This paper discusses an approach where the SC interface is controlled independently from the battery interface, with a small droop factor and a high pass filter (HPF), to produce high and short current pulses and smooth DC bus voltage variations due to sudden power imbalances in the DC nanogrid. Experimental results are presented to show that, unlike in a conventional HESS, the SC unit can be used to improve the dynamic voltage regulation of the DC nanogrid and, indirectly, mitigate the high and fast current variations in the battery.

scholarly journals Voltage Distortion Suppression for Off-grid Inverters with an Improved Load Current Feedforward Control

2017 ◽  
Vol 17 (3) ◽  
pp. 716-724
Author(s):  
Yiwen Geng ◽  
Xue Zhang ◽  
Xiaoqiang Li ◽  
Kai Wang ◽  
Xibo Yuan
Keyword(s):  
Feedforward Control ◽  
Load Current ◽  
Voltage Distortion ◽  
Load Current Feedforward

scholarly journals Charging/discharging system based on zeta/sepic converter and a sliding mode controller for dc bus voltage regulation

2020 ◽  
Vol 13 (8) ◽  
pp. 1514-1527 ◽  
Author(s):  
Elkin Edilberto Henao‐Bravo ◽  
Andres Julian Saavedra‐Montes ◽  
Carlos Andres Ramos‐Paja ◽  
Juan David Bastidas‐Rodriguez ◽  
Daniel Gonzalez Montoya
Keyword(s):  
Sliding Mode ◽  
Voltage Regulation ◽  
Sliding Mode Controller ◽  
Dc Bus ◽  
Bus Voltage
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