A Decentralized Dynamic Power Sharing Strategy for Hybrid Energy Storage System in Autonomous DC Microgrid

Xu, Qianwen; Hu, Xiaolei; Wang, Peng; Xiao, Jianfang; Tu, Pengfei; Chen, Wen; Lee, Meng Yeong

doi:10.1109/tie.2016.2608880

Cited by 280 publications

(126 citation statements)

References 25 publications

Supporting

Mentioning

126

Contrasting

Order By: Relevance

“…However, owing to the time-varying and intermittent output features of some renewable sources, energy storage plays an indispensable role to improve the stability and energy utilization rate of the distributed energy generation system (DEGS) [4][5][6]. In existing DEGS, the renewable energy sources, storage units and loads are connected together by their independent converters.…”

Section: Introductionmentioning

confidence: 99%

A High-Efficiency Isolated LCLC Multi-Resonant Three-Port Bidirectional DC-DC Converter

Wang

et al. 2017

Energies

View full text Add to dashboard Cite

Abstract:In this paper, an isolated multi-resonant three-port bidirectional direct current-direct current (DC-DC) converter is proposed, which is composed of three full bridges, two inductor-capacitorinductor-capacitor (LCLC) multi-resonant tanks and a three-winding transformer. The phase shift control method is employed to manage the power transmission among three ports. Relying on the appropriate parameter selection, both of the fundamental and the third order power can be delivered through the multi-element LCLC resonant tanks, and consequently, it contributes to restrained circulating energy and the desirable promoted efficiency. Besides, by adjusting the driving frequency under different load conditions, zero-voltage-switching (ZVS) characteristics of all the switches of three ports are guaranteed. Therefore, lower switching loss and higher efficiency are achieved in full load range. In order to verify the feasibility of the proposed topology, a 1.5 kW prototype is established, of which the maximum efficiencies under forward and reverse operating conditions are 96.7% and 96.9% respectively. In addition, both of the bidirectional efficiencies maintain higher than 95.5% when the power level is above 0.5 kW.

show abstract

Section: Introductionmentioning

confidence: 99%

A High-Efficiency Isolated LCLC Multi-Resonant Three-Port Bidirectional DC-DC Converter

Wang

et al. 2017

Energies

View full text Add to dashboard Cite

show abstract

“…At the same time, the battery interface converter uses a virtual resistance droop (VRD) control to make the battery provide total power at steady state. Due to using the VCD and VCR control, the HESS can adapt to the distributed nature of the DC micro-grid and increase system reliability and scalability [35,36]. The specific control strategy is shown in Figure 8.…”

Section: Control Strategy For Bidirectional Power Flowmentioning

confidence: 99%

Common Grounded H-Type Bidirectional DC-DC Converter with a Wide Voltage Conversion Ratio for a Hybrid Energy Storage System

Wang

2018

Energies

View full text Add to dashboard Cite

Hybrid energy storage systems (HESS) play an important role in maintaining the power balance of a direct current (DC) micro-grid. A HESS is mainly composed of high power density super-capacitors (SCs) and high energy density batteries. According to the operational requirements of an SC, a bidirectional DC-DC converter with the characteristics of a good dynamic response and a wide voltage conversion ratio is needed to interface the SC and a high-voltage DC bus. In this paper, a novel common grounded H-type bidirectional converter characterized by a good dynamic response, a low inductor current ripple, and a wide voltage conversion ratio is proposed. In addition, it can avoid the narrow pulse of pulse width modulation (PWM) voltage waveforms when a high voltage conversion ratio is achieved. All of these features are beneficial to the operation of the SC connected to a DC bus. The operating principle and characteristics of the proposed converter are presented in this paper. A 320 W prototype with a wide voltage conversion ranging from 3.3 to 8 in step-up mode and 1/8 to 1/3 in step-down mode has been constructed to validate the feasibility and effectiveness of the proposed converter.

show abstract

“…Although this method has high control accuracy, it relies heavily on the centralized control unit and can not realize plug-and-play. References [10] and [11] propose a virtual capacitive droop control to realize the power distribution among different DGs. However, the influence of the line resistance on the power distribution characteristics of the controller is not considered, which makes it difficult for energy storage devices at different positions to respond to the unbalanced power in the system according to the set distribution scheme.…”

Section: Introductionmentioning

confidence: 99%

The Hierarchical Control Algorithm for DC Microgrid Based on the Improved Droop Control of Fuzzy Logic

et al. 2019

View full text Add to dashboard Cite

In the direct current (DC) microgrid composed of multiple distributed generations, due to the different distances between various converters and the DC bus in the system, the difference of the line resistance will reduce the current sharing accuracy of the system. The droop control was widely used in the operation control of the DC microgrid. It was necessary to select a large droop coefficient to improve the current sharing accuracy, but a too large droop coefficient will lead to a serious bus voltage drop and affect the power quality. In view of the contradiction between the voltage regulation and load current sharing in the traditional droop control, a hierarchical control algorithm based on the improved droop control of the fuzzy logic was proposed in this paper. By improving the droop curve, the problems of voltage regulation and current sharing were solved simultaneously. The effectiveness of the algorithm was verified by simulation.

show abstract

A Decentralized Dynamic Power Sharing Strategy for Hybrid Energy Storage System in Autonomous DC Microgrid

Cited by 280 publications

References 25 publications

A High-Efficiency Isolated LCLC Multi-Resonant Three-Port Bidirectional DC-DC Converter

A High-Efficiency Isolated LCLC Multi-Resonant Three-Port Bidirectional DC-DC Converter

Common Grounded H-Type Bidirectional DC-DC Converter with a Wide Voltage Conversion Ratio for a Hybrid Energy Storage System

The Hierarchical Control Algorithm for DC Microgrid Based on the Improved Droop Control of Fuzzy Logic

Contact Info

Product

Resources

About