Tao Xu

Dynamic Coordination for PWM-Based Active Thermal Control of Multiple Inverters

Tao Xu, Feng Gao, W. X. Lu

Coordinating PWM among multiple inverters can dramatically improve the performance of active thermal control (ATC). But as the number of inverters increases, their coordination with fixed grouping cannot further maximize the ATC performance due to the inconsistent power variation among inverters. This …

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Quantification of Transient Voltage Rise in UHVDC Sending End Power Grid Under Commutation Failure

Hongjuan Ge, Tao Xu, Jianan Mu, Lin Cheng et autres

Ultra-high-voltage direct current (UHVDC) transmission serves as a vital method for long-distance transmission of renewable energy in China. Commutation failure represents a common fault type in UHVDC transmission systems, causing the sending-end bus voltage to exhibit a “low-to-high” characteristic. This phenomenon poses …

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An Impedance Measurement Method for Renewable Energy Power Station

Ze Wei, Tao Xu, Jianan Mu, Lin Cheng et autres

The large-scale integration of renewable energy grid-connected converters into the grid has given rise to many broadband oscillation accidents, primarily due to impedance mismatching with the grid. Consequently, accurate measurement of both the grid-connected converter and the grid impedance is a prerequisite …

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Improved 2RC-PNGV Modeling and Adaptive Sage-Husa H Infinity Filtering for Battery Power State Estimation Based on Multi-Parameter Constraints

Yan Xinyu, Shunli Wang, Tao Xu, Cheng Liangwei et autres

With the transformation of the global energy landscape, lithium-ion batteries have become an important component in the field of new energy storage. Accurate assessment of battery status plays a crucial role in efficiently utilizing electrical energy and extending the battery's service life. …

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An Improved Steady-State Analysis Model for Nine-Arm Modular Multilevel Converter With Higher Accuracy and Versatility

Futian Qin, Feng Gao, Jingyang Fang, Tao Xu et autres

As a novel high-voltage and high-power multilevel topology with two sets of AC terminals, nine-arm modular multilevel converter (9A-MMC) can effectively reduce system volume, weight, and cost by multiplexing the middle arm. Steady-state analysis for 9A-MMC is crucial to its circuit parameters …

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Reinforcement Learning in hyperbolic space for multi-step reasoning

Tao Xu, Momiao Xiong

Multi-step reasoning is a fundamental challenge in artificial intelligence, with applications ranging from mathematical problem-solving to decision-making in dynamic environments. Reinforcement Learning (RL) has shown promise in enabling agents to perform multi-step reasoning by optimizing long-term rewards. However, conventional RL methods struggle …

A simplified method to determine the wall thickness of GCL composite cutoff wall

Sheng-Yi Deng, Hefu Pu, Zhongping Chen, Tao Xu et autres

Geosynthetic clay liners (GCLs) have recently been incorporated into the traditional soil walls to form GCL composite vertical cutoff walls for waste containment applications in contaminated sites. This novel cutoff wall has been used in engineering practice; however, the design method of …

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A Modular Multilevel Series/Parallel Converter With Ability of Parallelization Across Submodules

Futian Qin, Jingyang Fang, Feng Gao, Tao Xu et autres

Recently, modular multilevel series/parallel converters (MMSPCs) have witnessed an upward trend, where the submodules (SMs) are allowed to be connected not only in series but also in parallel. The parallel operation of SMs offers significant advantages, including sensorless capacitor voltage balancing, arm …

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Adaptive Grid-Connected and Islanded Control Method for Multi-Port Programmable Sop-Storage-Charger Device

Xiaoli Chi, Tao Xu, Feng Gao, Pengyu Su et autres

With the rise of distributed energy and flexible loads, power systems are evolving towards greater flexibility and intelligence. Multi-port programmable SOP-Storage-Charger device, enable seamless energy flow between AC/DC grids, enhancing renewable energy integration. However, challenges like control mode switching and power fluctuations …

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Optimization Strategy for Power Allocation of Multiple PEM Electrolyzers in Frequency Regulation

Lixia Wang, Tao Xu, Feng Gao, Lei Zhang et autres

To address the issue of declining frequency regulation capability in microgrid systems caused by new energy integration, this paper proposes a power allocation optimization strategy involving multiple PEM electrolyzers for frequency regulation. Firstly, for power allocation strategy validation, PVstorage hydrogen generation system …

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Modeling and Analysis of Trigger Angle of Sending End Converter Station under Commutation Failure of UHVDC Transmission System Taking into Account VDCOL

Hongjuan Ge, Ze Wei, Tao Xu, Mou Jianan et autres

With the increasing demand for electricity under economic development, ultra high voltage direct current (UHVDC) transmission project as the main transmission channel, its safety and stability problems have been widely concerned. As a common fault of DC transmission, the transient stability problem …

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MMC-STATCOM composite control strategy for offshore wind power system failure

Xuejun Xiong, Xiaojun Xu, Tao Xu, Xiaoxue Hu et autres

With the rapid development of large-scale renewable energy integration and flexible DC transmission technologies, modular multilevel converter (MMC)-based high-voltage direct current (HVDC) systems have emerged as a core solution for next-generation DC transmission projects, owing to their modular structure, active/reactive power decoupling …

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