Article
Engineering, Multidisciplinary
Andre Elias Lucena da Costa, Cursino Brandao Jacobina, Nady Rocha, Phelipe Leal Serafim Rodrigues
Summary: The article introduces a new five-leg multilevel converter with varied output voltages achieved by using a transformer, which was validated through simulated and experimental results.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2021)
Article
Automation & Control Systems
Andre Elias Lucena da Costa, Cursino Brandao Jacobina, Nady Rocha, Edison Roberto Cabral da Silva, Antonio Venancio de Moura Lacerda Filho
Summary: This article presents a single-phase AC-DC-AC unidirectional three-level three-leg converter, which allows feeding the load voltage with a sinusoidal voltage with constant amplitude and frequency. The proposed converter retains the advantages of T-type leg with lower conduction losses and better power quality, making it suitable for low-medium voltage applications. The space-vector pulsewidth modulation technique is employed to reduce switching losses and ensure five-level multilevel voltages at both the grid and load sides.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Energy & Fuels
Ziwen Liu, Shihong Miao, Weixing Wang, Dandan Sun
Summary: This paper introduces a comprehensive control scheme for the interlinking converter (ILC) in a hybrid AC/DC microgrid, consisting of outer loop flexible power sharing control and improved robust inner loop control. The control scheme aims to achieve dynamic stability and control effectiveness in the microgrid through enhancements in both outer loop and inner loop control.
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Mohsen Rezaie Estabragh, Ali Dastfan, Morteza Rahimiyan
Summary: This paper investigates a tradeoff between two objectives to find an optimum number of parallel interlinking converters for enhancing the capacity of apparent power exchanging between the AC and DC buses.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Article
Energy & Fuels
Can Wang, Can Deng, Guiyuan Li
Summary: This paper proposes an IC control strategy in hybrid microgrids to estimate line impedance and achieve accurate power transfer. By injecting a specific small signal to estimate line impedance and compensating for voltage drop with local information, power balance and accurate transmission between sub-grids can be achieved.
Article
Green & Sustainable Science & Technology
Junjun Wang, Chaoyu Dong, Chi Jin, Pengfeng Lin, Peng Wang
Summary: This paper proposes a distributed uniform control strategy for parallel bidirectional interlinking converters to achieve resilient operation in a hybrid ac/dc microgrid. The proposed strategy coordinates the control objectives of the converters in different operation modes, eliminating mode transition detections and improving system reliability and resilience under various fault conditions.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2022)
Article
Computer Science, Information Systems
Ataollah Samadian, Milad Ghavipanjeh Marangalu, Hadi Tarzamni, Seyed Hossein Hosseini, Mehran Sabahi, Ali Mehrizi-Sani
Summary: In this article, a new common grounded switched quasi Z-source DC-DC converter is proposed, which provides voltage-boosting capability, low voltage stress on semiconductors, and continuous input current waveform. It is suitable for photovoltaic power generation systems.
Article
Engineering, Electrical & Electronic
Nagarjun Surulivel, Dipankar Debnath, Chandan Chakraborty
Summary: The increasing focus on renewable energy generation has led to the expansion of distributed generation and localized DC grids worldwide. DC households are becoming a more prevalent and efficient alternative to AC households. A new four-port converter, called the Bipolar Boost Four-Port Converter (BBFPC), is proposed in this article to integrate renewable energy sources, energy storage elements, and a bipolar port capable of bidirectional power flow. The BBFPC has inductively interfaced ports that can handle bidirectional power flow and perform various functions such as maximum power point tracking for solar PV and voltage regulation or power distribution control for the bipolar port.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Lei Wang, Xiaofan Fu, Man-Chung Wong
Summary: The development of hybrid ac/dc microgrids benefits from the respective advantages of ac and dc microgrids, and the proposed hybrid coupled interlinking converter improves control and compensation effectiveness. Moreover, the fast harmonic control strategy not only enhances the filtering characteristics of the SVC, but also suppresses harmonic power.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Subramanian Vasantharaj, Vairavasundaram Indragandhi
Summary: This study presents a 10-switch converter as an interlinking converter for a bipolar hybrid ac/dc microgrid (MG). The converter utilizes a space vector modulation technique to maximize the utilization of dc-link voltage and minimize total harmonic distortion (THD). Furthermore, the architecture of the grid-tied interlinking converter is improved to reduce low-order harmonics and balance the dc-link voltage. The results show that the proposed technique provides more reliable utilization of the dc bus voltage and significantly less THD compared to existing techniques.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2023)
Article
Engineering, Multidisciplinary
Andre Elias Lucena da Costa, Cursino Brandao Jacobina, Nady Rocha
Summary: This article introduces a single-phase hybrid six-leg AC-DC-AC multilevel converter, providing discussions on the system model, control strategy, and space-vector pulse width modulation technique. The converter can generate 9-level and 11-level output voltages while feeding the load with stable AC voltage.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2021)
Article
Energy & Fuels
Joao Pedro Carvalho Silveira, Pedro Jose dos Santos Neto, Beatriz Cristina Moura, Ernesto Ruppert Filho, Tarcio Andre dos Santos Barros
Summary: This paper presents a battery management system (BMS) for a modified interlinking converter in a hybrid AC/DC microgrid. The power management strategy (PMS) employs the BMS to avoid battery operation in harmful conditions, increase battery banks' life cycle, and provides techniques for power-sharing, power quality mitigation, and grid formation. Simulations were performed to evaluate the performance of the proposed BMS, PMS, and interlinking converters, showing appropriate performance for the hybrid microgrid in both grid-connected and standalone modes, and satisfactory BMS response during operation restrictions.
Article
Engineering, Electrical & Electronic
Yi Yang, Ping Yang
Summary: This paper proposes a novel control strategy for parallel-operated interlinking converters (ILCs) in a hybrid AC/DC microgrid (HM) to improve power quality. The strategy selects a master ILC to control the voltage source mode, achieving balanced and harmonic-free AC bus voltage, while other ILCs act as slave ILCs, controlling the current source mode to eliminate DC bus voltage ripple. The proposed control strategy effectively integrates power quality compensation without additional hardware, reducing the cost of power quality control and achieving balanced and harmonic-free AC bus voltage and ripple-free DC bus voltage simultaneously.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Engineering, Multidisciplinary
Rodrigo Pereira de Lacerda, Cursino Brandao Jacobina, Edgard Luiz Lopes Fabricio, Alan Santana Felinto, Jean Torelli Cardoso
Summary: This paper investigates a single-phase AC-DC-AC multilevel converter that achieves higher and multilevel output voltage by connecting a three-leg module and an H-bridge at the load side. The proposed solution uses a high-frequency link to optimize the SV-PWM strategy and simplify the control system. The system is suitable for uninterrupted power supply and unified power quality conditioner applications.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Rouzbeh Reza Ahrabi, Yun Wei Li, Farzam Nejabatkhah
Summary: The paper introduces a unified control strategy for parallel LCC-VSCs in hybrid AC/DC grids to reduce system costs and improve performance, addressing drawbacks of LCC systems. The proposed control system modifies the LCC's V-I graph and uses droop-based control of VSCs to provide voltage/frequency and voltage support for AC and DC sub-grids under various operating conditions. Case study results with a realtime simulator are presented to demonstrate the effectiveness of the control strategy.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)