Compensation Facility for Traction Power System Based on Unified Power Manipulating by WANG Ronghua, WEN Gang

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Analysis and Suppression of Harmonic Deteriorations Related to a Few-Submodule and Low-Switching-Frequency MMC-Based UPFC by Zhijun Chen, Jun Wang, Ke Zhang, Chao Yu, Yuting Zou, Yunlong Zhao, Mengjie Zhang, Chuyang Wang

“…System efficiency, power quality, and economic benefits have always been essential for the Unified Power Flow Controller (UPFC based on a Modular Multilevel Converter (MMC). …”
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Model Range of Unified Power Drives for Commercial Electric Transport by Sergey N. Poddubko, Alexander V. Belevich, Mikhail V. Kalinin, Pavel E. Shabanau

“…The result of works on unification of electric power drives for commercial transport also is a number of standard designs of parts and units and assembly units; normative and technical support of control (tests, analysis, measurements) of certification and quality assessment of products; establishment of requirements for technological processes, including for reduction of material, energy and labor intensity to ensure the use of low-waste technologies. …”
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Unified resilience model using deep learning for assessing power system performance by Volodymyr Artemchuk, Iurii Garbuz, Jamil Abedalrahim Jamil Alsayaydeh, Vadym Shkarupylo, Andrii Oliinyk, Mohd Faizal Bin Yusof, Safarudin Gazali Herawan

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Research on Missing Data Estimation Method for UPFC Submodules Based on Bayesian Multiple Imputation and Support Vector Machines by Xiaoming Yu, Jun Wang, Ke Zhang, Zhijun Chen, Ming Tong, Sibo Sun, Jiapeng Shen, Li Zhang, Chuyang Wang

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Application and impact of multi-power quality objective optimization control in low-voltage ride-through for grid-connected inverters by Haining Wang, Jiang Geng, Bowen Feng, Di Xie, Peng Zhang, Liangliang Wang, Jigang Yao

“…This paper proposes a model predictive control (MPC)-based power quality optimization method designed to enhance the low-voltage ride-through (LVRT) capability of grid-connected inverters under various grid voltage sag conditions, while achieving multi-objective power quality optimization. …”
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A Novel Unified Single-Phase Active Rectifier Topology With Advanced Operating Modes for Smart Grids by Vitor Monteiro, Filipe Costa, Sergio Coelho, Joao L. Afonso

“…With the proposed USP front-end converter, the following independent operation modes are available: 1) operation as a traditional active rectifier, ensuring sinusoidal AC grid current (with very low total harmonic distortion), unitary power factor, and controlled DC link voltage; 2) operation as a shunt active power filter, producing a current with controlled harmonic content and phase angle at the fundamental frequency, in order to ensure almost sinusoidal current and a unitary power factor at the AC power grid; and 3) combined operation as an active rectifier and as a shunt active power filter, providing power to the DC load, while simultaneously producing a current waveform with reduced harmonic content and controlled power factor. …”
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Deep reinforcement learning-based controller for DC-link voltage regulation and voltage sag compensation in a solar PV-integrated UPQC system by Mangalapuri Sravani, Polamraju V. S. Sobhan

“…These issues are often mitigated by devices known as Unified Power Quality Conditioners (UPQCs), which control both series and shunt power disturbances. …”
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Enhanced Power Quality Control in Grid Tied PVG-UAPF Systems Using a Modified Second Order Generalized Integrator and Notch Filter by K. M. Sanjeeva Kumar, Satyajit Das

“…Moreover, the gain magnitudes achieved for rejecting DC offsets, lower order harmonics, and higher order harmonics are relatively low. To address these limitations, this work introduces a modified second order generalized integrator with a notch filter (MSOGI) in a photovoltaic generator fed unified active power filter (PVG-UAPF) framework. …”
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Low Noise Programmable DC Amplifier with Remote Control by Viktor E. Ivanov, Chye En Un

“…To analyse the intrinsic noise of electronic potentiometers. To develop a low-noise unified DC amplifier with the possibility of external digital control parameters. …”
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GRU controller-based UPQC compensator design for improving power quality in grid-integrated non-linear load system by B. Srikanth Goud, Ch. Naga Sai Kalyan, Gundala Srinivasa Rao, Bhabasis Mohapatra, Narsimha Reddy Kuppireddy, Harish Pulluri, Ch. Rami Reddy, Mohammad Shorfuzzaman, Basem Abu Zneid, Mukesh Pushkarna

“…To overcome these challenges design of a unified power quality conditioner (UPQC) plays a vital role in mitigating the PQ issues. …”
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Frequency-Decrease Effect and Inhibitory Strategies for Capacitor Voltage in MMC-UPFCs Based on Tagging Technology by WANG Chuyang, ZHANG Mengjie, ZHAO Yunlong, ZOU Yuting, ZHANG Li

“…[Objective] In this study， we aim to address the submodule capacitor voltage frequency reduction effects and the resulting deterioration in system switching losses and harmonic performance in modular multilevel converter （MMC）-based unified power flow controllers （UPFCs） under low switching frequencies， frequency reduction suppression， and capacitor voltage balancing optimization strategy based on profiling tag technology. …”
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Coordinated control of grid-following and grid-forming energy storage for virtual inertia response considering frequency modal characteristics by Hengning Yu, Liangzhong Yao, Shuai Liang, Jian Xu, Fan Cheng, Ming Wu

“…Then, considering the system’s initial frequency change rate constraints and the remaining capacity of energy storage, the virtual inertia control parameters of GFL-ES and GFM-ES are coordinated and allocated based on the unified structure model to effectively balance the virtual inertia support power of energy storage systems with different characteristics. …”
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A Unified Optimization Framework for Cost-Effective and Voltage-Stable Operation of Renewable Energy-Based Microgrids Using Mixed-Integer Nonlinear Programming by Peter Anuoluwapo Gbadega, Yanxia Sun, Olufunke Abolaji Balogun

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Distributed Predictive Control of the Two-Stage Power Converter From the Battery to the Motor Considering the DC-Voltage Prediction by Reza Zolfagharian, S. Alireza Davari, Freddy Flores-Bahamonde, Jose Rodriguez

“…Furthermore, the proposed technique alleviates the computational burden associated with the unified control methods, aiming to enhance feasibility and minimize complexity. …”
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Mechanism analysis and suppression of bus voltage low frequency oscillation of multi-VSC connected substation by CHENG Liang, DUAN Pengyang, SU Hongbang, MA Guisheng, TIAN Shengjuan, DAI Zheng

“…Focusing on low-frequency dynamics, each VSC and AC power grid were independently established, which is applicable to different quantities of grid-tied VSC with various control strategies. …”
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Diode Rectifier Unit Based LFAC Transmission for Offshore Wind Farm Integration by Yingjie TANG, Zheren ZHANG, Zheng XU

“…Since the DRU is uncontrolled, a corresponding control strategy of the offshore wind turbines is proposed for LFAC transmission system, in which the machine side converter (MSC) controls the DC voltage and the grid side converter (GSC) implements the maximum power point tracking (MPPT) and AC voltage control together in the global unified reference coordinate system. …”
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Hybrid current regulation of photovoltaic power integrated in railway traction power supply system by ZHANG Weiqiu, CHENG Peng, ZHANG Jingyan, HOU Dazhi, SUN Shijie, MA Jing

“…The control was implemented in the three-phase static coordinate system, and the mixed current was controlled by the positive sequence current component required by photovoltaic power transmission and the negative sequence current component required by traction load compensation, so as to realize the unified control of grid-connected power generation and negative sequence compensation of photovoltaic inverters. …”
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A Multi-Constraint Co-Optimization LQG Frequency Steering Method for LEO Satellite Oscillators by Dongdong Wang, Wenhe Liao, Bin Liu, Qianghua Yu

“…However, subject to stringent size, power, and cost constraints, LEO satellites are typically equipped with oven-controlled crystal oscillators (OCXOs) as the system clock. …”
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Multi-Objective Optimal Control of Variable Speed Alternating Current-Excited Pumped Storage Units Considering Electromechanical Coupling Under Grid Voltage Fault by Tao Liu, Yu Lu, Xiaolong Yang, Ziqiang Man, Wei Yan, Teng Liu, Changjiang Zhan, Xingwei Zhou, Tianyu Fang

“…Typically connected to weak grids, conventional low-voltage ride-through (LVRT) control methods for these units suffer from single control objectives, poor adaptability, and neglect of electromechanical coupling characteristics. …”
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