A New Local Control Method of Interlinking Converters to Improve Global Power Sharing in an Islanded Hybrid AC/DC Microgrid

Chang, Jae Yoon; Moon, Seung-Il; Lee, Gyu Sub; Hwang, Pyeong-Ik

doi:10.1109/tec.2020.2967416

Cited by 27 publications

(12 citation statements)

References 29 publications

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“…Từ khoá: Lưới điện nhỏ dạng lai, bộ biến đổi công suất liên kết, bộ biến đổi công suất đa bậc dạng mô-đun, điều khiển phân tán GIỚI THIỆU 1 Lưới điện nhỏ dạng lai ngày càng phổ biến do tính IC đã được nghiên cứu và phát triển nhằm với nhiều 23 mục tiêu khác nhau: giảm tổn hao công suất trao đổi, giảm sóng hài bậc cao, giảm độ méo dạng tín hiệu điều chế, nâng cao chất lượng điện năng, dễ dàng kết nối hệ thống cho nhu cầu khác nhau về công suất và điện áp…. [2][3][4][5][6] . Đứng trước các yêu cầu trên, xu hướng thiết kế các bộ IC dạng MMC ngày càng được chú trọng nghiên cứu.…”

Section: Tóm Tắtunclassified

Decentralized control of level-shifted carrier-based pwm for modular multilevel interlinking converter in hybrid microgrid

Dzung¹,

Nguyen²,

Truong³

et al. 2021

Sci. Tech. Dev. J.- Eng. Tech.

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The interlinking converters is one of the important components in the hybrid mirogrid system, the study of structure and control method of the interlinking converters in hybrid mirogrid has been implemented and achieved positive results. This paper proposes an improved decentralized control of level-shifted carrier-based PWM for a modular multilevel interlinking converter (IC-MMC) in standalone hybrid microgrid (HMG-Hybrid Microgrid). Main research objectives is to study the capability of the decentralized control method proposed for the IC-MMC unit when performing the power exchange control task between the DC and AC bus in the HMG system, increased flexibility in controls. Furthermore, the proposed control method for IC-MMC for HMG is also verified in term of dynamically reconfiguration when changing the number of modules in the MMC when the improve of system reliability is needed. The feasibility of the carrier level shift control method for IC-MMC in HMG has been verified by simulation model on MATLAB/Simulink software to evaluate the ability to exchange power between the DC bus and the AC bus.

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Section: Tóm Tắtunclassified

Decentralized control of level-shifted carrier-based pwm for modular multilevel interlinking converter in hybrid microgrid

Dzung¹,

Nguyen²,

Truong³

et al. 2021

Sci. Tech. Dev. J.- Eng. Tech.

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“…Each phase of the UIPC has one SPC, indexed by 𝑆𝑃𝐶 𝑖 , 𝑖 = 1,2,3. The PPC aims on regulating the DC side voltage as well as 𝑉 𝐴𝐶 1 . It also controls the bidirectional power flow in coordination with the ESSs main power converters (MC) which connects all ESSs to the UIPC DC bus.…”

Section: A Proposed Uipc Topologymentioning

confidence: 99%

“…In obedience to the literature, hybrid microgrids (HmGs) are good choice to interconnected multiple AC and DC subsystems since they reduce the AC/DC conversion stages, provide general management of several AC and DC subsystems, and facilitate the integration of these subsystems with current power grid [1,2]. The HmGs mainly encompass several AC and DC subsystems which have commonly been tied together through several power converters with parallel connection.…”

Section: Introductionmentioning

confidence: 99%

Model Reference Adaptive Control of UIPC in Islanded Hybrid Microgrids with Flexible Loads and Storages

Zolfaghari

Gharehpetian

Blaabjerg

et al. 2021

2021 IEEE International Conference on Environment and Electrical Engineering and 2021 IEEE Industrial and Commercial Power Syst

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The islanding operation of hybrid microgrids (HmGs), which adopt the unified interphase power controller (UIPC) as the major element for interconnecting of AC and DC subsystems, is analyzed in this work. The studied HmG includes two AC subsystems and one energy storage-based DC subsystem (ESDC) and some flexible loads. A model reference adaptive control (MRAC) mechanism is suggested to control the UIPC, maintaining an appropriate bidirectional power flow control with simple structure. As another contribution, a new structure topology for the UIPC's power converter at DC side is proposed based on the dual-active-bridge topology and a harmonic-based modeling approach is follow-up for UIPC's power converter modelling. The results of simulations indicate acceptable islanding operation performance of HmG with the proposed structure.

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“…Autonomous control of a HMG with multi‐port IC to serve different DC voltage levels is proposed in Reference 12. Decentralized control of HMGs with multiple ICs 13‐16 and multiple subgrids 17 are also investigated. Control schemes for virtual synchronous machine emulated operation of IC to improve the transient performance of active power flow in the HMG are presented in References 18‐20.…”

Section: Introductionmentioning

confidence: 99%

Coordinated power control withoutACvoltage sensing and active power filtering using interlinking converter with reduced interlinking power flow in a droop controlled islanded hybridAC‐DCmicrogrid

Shravan

Vyjayanthi

2021

Int Trans Electr Energ Syst

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Summary An interlinking converter (IC) in a hybrid AC‐DC microgrid (HMG) is the power transfer medium between the AC and DC subgrids. This article proposes a modified control strategy of IC for carrying out the power transfer between the subgrids without sensing the AC voltages. This control strategy directly extracts the AC voltages from the gate signals used for controlling the IC. The omission of AC voltage sensing process upgrades the reliability of the system and also minimizes the size and cost of the system considerably. The paper also studies the operation of IC as an active power filter (APF) under non‐linear loading conditions, with the objective of reducing the interlinking power flow. APF using IC while carrying out power transfer between the subgrids generate high power losses. This issue is addressed by controlling the IC using the power request method, thereby ensuring a reduced power flow through the IC. In this article, the results obtained from the simulation of the HMG in MATLAB/Simulink are presented to verify effectiveness of the proposed control strategy. The results of real‐time simulations performed using OPAL‐RT (OP4500) real‐time simulator test bed are also presented to validate the potency of the proposed control strategy.

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A New Local Control Method of Interlinking Converters to Improve Global Power Sharing in an Islanded Hybrid AC/DC Microgrid

Cited by 27 publications

References 29 publications

Decentralized control of level-shifted carrier-based pwm for modular multilevel interlinking converter in hybrid microgrid

Decentralized control of level-shifted carrier-based pwm for modular multilevel interlinking converter in hybrid microgrid

Model Reference Adaptive Control of UIPC in Islanded Hybrid Microgrids with Flexible Loads and Storages

Coordinated power control withoutACvoltage sensing and active power filtering using interlinking converter with reduced interlinking power flow in a droop controlled islanded hybridAC‐DCmicrogrid

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