"New IEEE paper on unified power regulation in hybrid microgrids"

I would like to bring your attention to our new paper titled "Theory and Method of Distributed Virtual Zero-Sequence Synchronous Generators for Cooperative Fault Arc Suppression in Active Distribution Networks," published in the IEEE Transactions on Industrial Electronics. The paper is linked below, and here’s a brief summary: https://lnkd.in/gZZcRCHb Summary: Single-line ground (SLG) faults in distribution networks can cause hazards such as fire, electric shock, and overvoltage. Active power electronic converters (PECs) can suppress fault current and voltage; however, their application is limited due to low suppression rates and the high cost of additional equipment. This article proposes using distributed power electronics in active distribution networks to cooperatively eliminate faults. In this method, PECs are modeled as virtual zero-sequence synchronous generators (VZSGs), and line-to-ground impedances (LGIs) are modeled as zero-sequence loads. We propose a theory for distributed VZSGs supplying zero-sequence loads, which can effectively suppress fault current and voltage. The required supply current is adaptively allocated among VZSGs based on their reserve capacity ratio, and their supply current is dynamically adjusted according to the droop coefficients of VZSGs as LGIs change. This approach improves the fault current and voltage suppression rates by combining voltage- and current-based suppression methods. This new research relates to our previous works on fault suppression in active distribution networks, which I've also linked for your convenience. If you're working in this area or have an interest, I invite you to take a look at these papers. https://lnkd.in/gVCfTRb3 https://lnkd.in/gCUzeHUK https://lnkd.in/gGq_8GtT https://lnkd.in/g4gABcHa

𝗔 𝗠𝗶𝗹𝗹𝗶𝗺𝗲𝘁𝗲𝗿-𝗪𝗮𝘃𝗲 𝗔𝗻𝗮𝗹𝗼𝗴–𝗗𝗶𝗴𝗶𝘁𝗮𝗹 𝗩𝗮𝗿𝗶𝗮𝗯𝗹𝗲 𝗖𝗮𝗽𝗮𝗰𝗶𝘁𝗼𝗿 𝗪𝗶𝘁𝗵 𝗛𝗶𝗴𝗵 𝗧𝘂𝗻𝗶𝗻𝗴 𝗥𝗮𝘁𝗶𝗼 𝗥𝗲𝗮𝗹𝗶𝘇𝗲𝗱 𝗯𝘆 𝗠𝗼𝗻𝗼𝗹𝗶𝘁𝗵𝗶𝗰 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝗼𝗳 𝗕𝗦𝗧 𝗩𝗮𝗿𝗮𝗰𝘁𝗼𝗿𝘀 𝗮𝗻𝗱 𝗚𝗲𝗧𝗲 𝗦𝘄𝗶𝘁𝗰𝗵𝗲𝘀 I am pleased to announce the publication of our article in IEEE Microwave and Wireless Technology Letters (MWTL): “A Millimeter-Wave Analog–Digital Variable Capacitor With High Tuning Ratio Realized by Monolithic Integration of BST Varactors and GeTe Switches.” This work was first submitted to the IEEE International Microwave Symposium (IMS) and selected as one of the top 50 IMS submissions for inclusion in MWTL. To our knowledge, it represents the first demonstration of monolithic integration of BST varactors with GeTe phase-change switches. By combining analog tunability with digital switching, this approach enables high-performance, low-loss reconfigurable circuits for next-generation millimeter-wave systems. 🔗 Read the paper here: https://lnkd.in/ehcy6b-6

I’m excited to share our latest publication on reliability and cost evaluation of DC-DC solid-state transformers (SSTs) for medium-voltage applications, published in IEEE Transactions on Power Delivery. In this work, we developed a reliability and cost modeling framework for the DC-DC stage of SSTs, capturing infant mortality, random failures, and aging. The study compares two common submodule configurations—the 2-level full-bridge and the 3-level half-bridge—and introduces an analytical expression for the total cost of ownership (TCO), including installation, operation, repair, and downtime costs. By formulating a minimization problem, we explored how redundancy and design decisions affect system reliability and lifetime costs. The results show that, although redundancy increases the initial investment, it can lead to significant reductions in TCO over the system’s lifetime. Moreover, the cost of downtime and the ability to restore operation quickly after a fault play a decisive role in optimal design. This research provides a structured method to design cost-effective and reliable DC-DC SSTs for real-world applications. You can read the full paper here: https://lnkd.in/eXb5in3D

💥 I’m happy to share that our review paper has been accepted in IEEE Microwave Magazine (Early Access): 💥 “High-Q Tunable Bandpass Filters With a Wide Tuning Range Using a Minimum Number of Tuning Elements.” What we cover: 📚 * A decade of progress in 3D tunable microwave bandpass filters * How to achieve wide tuning ranges while preserving high Q * Three stages of development: 1. tuning elements used only on resonators, 2. single tuning element for the whole filter, 3. techniques to expand tuning range while still using minimal elements Why it matters 🤔 : fewer tuning elements → simpler, lower-loss, and more reliable designs for satellite, wireless, and reconfigurable RF systems. Proud to collaborate with Professor Raafat R. Mansour and Professor Gowrish Basavarajappa. Check out the PDF here: https://lnkd.in/g_ytS4bZ

Excited to share our latest publication in IEEE Transactions on Smart Grid, titled: “Nonsmooth Decentralized Voltage Controller for Constrained Regulation of DC Microgrids with Constant Power Loads” This paper addresses the challenges of islanded DC microgrids under high penetration of Constant Power Loads (CPLs). We propose a nonlinear, nonsmooth control law that achieves: - Easy implementation and tuning - Constrained Operation within a desired operating set
 - Guaranteed asymptotic stability of admissible equilibria - Significantly accelerates convergence time The effectiveness of this approach is demonstrated through both experimental tests and Power-Hardware-in-the-Loop studies. 🔗 More information here: https://lnkd.in/d8GR_7e8 Special thanks to my co-authors Apostolos Manasis and George Konstantopoulos for their invaluable contributions and insight! #SmartGrid #Microgrids #ControlSystems #PowerSystems #NonlinearControl #CPL

We are pleased to share one of our recent works, which is now available early online in IEEE Transactions on Industry Applications. In multi-terminal DC grids, the multi-line DC power flow controller (MDCPFC) has emerged as a promising candidate to augment the control degrees of freedom for power flow regulation. Characterized by centralized internal power exchange, traditional MDCPFCs inevitably suffer from high stress across semiconductors and reduced regulation ranges. To address these challenges, we propose an interleaved modular multi-level MDCPFC (IM3DCPFC) and a novel decentralized power exchange mechanism in this paper. The proposed topology features high voltage scalability and an extended operation range. To fully unleash the power flow control capabilities of IM3DCPFC, an optimal power exchange scheme is developed via a closed-form solution, paving the way for complex power flow manipulations in real engineering. Meanwhile, a comprehensive steady-state analysis method is developed against IM3DCPFC, offering an accurate and highly efficient solution to the characterization of its steady-state performance. Enjoy reading the paper in IEEE Xplore.

Can your existing systems handle tomorrow’s speed demands? One of our clients—a global communications technology company—faced this very challenge. They needed to boost transmission speeds to 3.125 Gbps across a backplane already deployed in the field, without the massive cost and disruption of replacing hardware. At Impact ES–Rhode Island, our engineers put their expertise in high-speed digital design, TDR, and signal integrity to work. The result? A validated backplane that met IEEE standards and supported the upgrade—delivering performance without replacement. Read the full case study to see how we helped our client upgrade smarter, faster, and more cost-effectively. https://lnkd.in/eBWJ7cb9

Can your existing systems handle tomorrow’s speed demands? One of our clients—a global communications technology company—faced this very challenge. They needed to boost transmission speeds to 3.125 Gbps across a backplane already deployed in the field, without the massive cost and disruption of replacing hardware. At Impact ES–Rhode Island, our engineers put their expertise in high-speed digital design, TDR, and signal integrity to work. The result? A validated backplane that met IEEE standards and supported the upgrade—delivering performance without replacement. Read the full case study to see how we helped our client upgrade smarter, faster, and more cost-effectively. https://lnkd.in/eBWJ7cb9

Can your existing systems handle tomorrow’s speed demands? One of our clients—a global communications technology company—faced this very challenge. They needed to boost transmission speeds to 3.125 Gbps across a backplane already deployed in the field, without the massive cost and disruption of replacing hardware. At Impact ES–Rhode Island, our engineers put their expertise in high-speed digital design, TDR, and signal integrity to work. The result? A validated backplane that met IEEE standards and supported the upgrade—delivering performance without replacement. Read the full case study to see how we helped our client upgrade smarter, faster, and more cost-effectively. https://lnkd.in/eBWJ7cb9

Can your existing systems handle tomorrow’s speed demands? One of our clients—a global communications technology company—faced this very challenge. They needed to boost transmission speeds to 3.125 Gbps across a backplane already deployed in the field, without the massive cost and disruption of replacing hardware. At Impact ES–Rhode Island, our engineers put their expertise in high-speed digital design, TDR, and signal integrity to work. The result? A validated backplane that met IEEE standards and supported the upgrade—delivering performance without replacement. Read the full case study to see how we helped our client upgrade smarter, faster, and more cost-effectively. https://lnkd.in/eBWJ7cb9