scholarly journals A Piecewise Control Strategy for a Bidirectional Series Resonant Converter

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 374 ◽  
Author(s):  
Sheng-Zhi Zhou ◽  
Xiaodong Li ◽  
Guo Chen ◽  
Song Hu
Keyword(s):  
Control Strategy ◽  
High Efficiency ◽  
Low Voltage ◽  
Storage System ◽  
Design Procedure ◽  
Energy Storage System ◽  
Current Control ◽  
Resonant Converter ◽  
Analysis And Design ◽  
Series Resonant

An energy storage system (ESS) plays an important part in a renewable energy generation system for stable and efficient power harvesting. To realize the function of an ESS, a bidirectional DC/DC converter with high power density and high efficiency is highly desired. In this paper, a high-frequency (HF) isolated dual-bridge series resonant converter (DBSRC) with a piecewise control strategy is proposed for an application with a wide variation of voltage gain. The proposed control strategy is based on dual-phase-shift modulation for a balance between complexity and flexibility. With this proposed control strategy, zero-voltage switching is kept for all switches on the low-voltage side and half of switches on the high-voltage side. Besides, there is no circulation energy on the low-voltage high-current side for full load operation. A step-by-step design procedure is also included to calculate the converter components and control parameters. Verification of the analysis and design are performed successfully through simulation and n experimental test. Comparisons with some existing control methods are also made experimentally, which highlights that the proposed control strategy is able to achieve comparable performance as the reported optimal current control with simpler calculation and implementation.

scholarly journals Using Energy Storage Inverters of Prosumer Installations for Voltage Control in Low-Voltage Distribution Networks

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1121
Author(s):  
Rozmysław Mieński ◽  
Przemysław Urbanek ◽  
Irena Wasiak
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Reactive Power ◽  
Low Voltage ◽  
Storage System ◽  
Distribution Networks ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Active Power ◽  
Total Power

The paper includes the analysis of the operation of low-voltage prosumer installation consisting of receivers and electricity sources and equipped with a 3-phase energy storage system. The aim of the storage application is the management of active power within the installation to decrease the total power exchanged with the supplying network and thus reduce energy costs borne by the prosumer. A solution for the effective implementation of the storage system is presented. Apart from the active power management performed according to the prosumer’s needs, the storage inverter provides the ancillary service of voltage regulation in the network according to the requirements of the network operator. A control strategy involving algorithms for voltage regulation without prejudice to the prosumer’s interest is described in the paper. Reactive power is used first as a control signal and if the required voltage effect cannot be reached, then the active power in the controlled phase is additionally changed and the Energy Storage System (ESS) loading is redistributed in phases in such a way that the total active power set by the prosumer program remains unchanged. The efficiency of the control strategy was tested by means of a simulation model in the PSCAD/EMTDC program. The results of the simulations are presented.

A Dual Mode Control Strategy of SMES for Multifunctional Applications

2011 ◽  
Vol 225-226 ◽  
pp. 987-991 ◽  
Author(s):  
Wen Yong Guo ◽  
Li Ye Xiao ◽  
Shao Tao Dai
Keyword(s):  
Control Strategy ◽  
High Efficiency ◽  
Reactive Power ◽  
Magnetic Energy ◽  
Storage System ◽  
Energy Storage System ◽  
Dual Mode ◽  
Power Fluctuation ◽  
Current Harmonics ◽  
Mode Control

The superconducting magnetic energy storage system (SMES) has good characteristics such as high efficiency, quick response, no deteriorations, etc. However it is still far from wide application. The main obstacle is due to its high cost. One of the most effective ways to reduce the cost of SMES is to make it multifunctional. In this paper, a dual mode control strategy is proposed. With the proposed control strategy, The SMES can compensate voltage dip, current harmonics, reactive power, and active power fluctuation with a simple topology. The efficacy of the proposed control strategy is verified by simulation results.

scholarly journals Analysis and Control of Battery Energy Storage System Based on Hybrid Active Third-Harmonic Current Injection Converter

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3140
Author(s):  
Yibin Tao ◽  
Jiaxing Lei ◽  
Xinzhen Feng ◽  
Tianzhi Cao ◽  
Qinran Hu ◽  
...  
Keyword(s):  
Control Strategy ◽  
Storage System ◽  
Energy Storage System ◽  
Current Control ◽  
Current Injection ◽  
Battery Energy Storage System ◽  
Harmonic Current ◽  
Battery Energy Storage ◽  
Third Harmonic ◽  
Battery Energy

This paper applies the emerging hybrid active third-harmonic current injection converter (H3C) to the battery energy storage system (BESS), forming a novel H3C-BESS structure. Compared with the commonly used two-stage VSC-BESS, the proposed H3C-BESS has the capability to reduce the passive components and switching losses. The operation principle of the H3C-BESS is analyzed and the mathematical model is derived. The closed-loop control strategy and controller design are proposed for different operation modes of the system, which include the battery current/voltage control and the injected harmonic current control. In particular, active damping control is realized through the grid current control, which could suppress the LC-filter resonance without the need of passive damping resistors. Simulation results show that the proposed topology and its control strategy have fast dynamic response, with a setup time of less than 4 ms. In addition, the total harmonic distortions of battery current and grid currents are only 2.54% and 3.15%, respectively. The amplitude of the injected harmonic current is only half of the grid current, indicating that the current injection circuit generates low losses. Experimental results are also provided to verify the validity of the proposed solution.

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