Results 61 to 70 of about 341 (142)

Harmonic State Space Based Impedance Modeling and Virtual Impedance Based Stability Enhancement Control for LCC-HVDC Systems

Journal of Modern Power Systems and Clean Energy
Line commutated converter based high-voltage direct-current (LCC-HVDC) transmissions are prone to harmonic oscillation under weak grids. Impedance modeling is an effective method for assessing interaction stability.
Yifeng Liu, Xiaoping Zhou, Quan Chen, Hanhang Yin, Lerong Hong, Hao Tian, Ying Chen, Siyuan Li   +7 more
doaj   +1 more source

Research on Vibration and Noise of Converter Transformer Based on LCL Converter

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
The paper outlines the topology of the new LCL converter. Through theoretical analysis and experimental verification, it has been confirmed that the proposed LCL converter not only effectively sup‐presses harmonics but also significantly reduces the vibration and noise of the converter transformers.
Liang Zhao, Longfu Luo, Yuzhuo Wang, Hao Zhang, Yan Feng, Yanyun Jin   +5 more
wiley   +1 more source

Simulation-based Optimisation of LCC-HVDC Controller Parameters using Surrogate Model Solvers [PDF]

2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL), 2019
This paper proposes the use of surrogate model optimisation methods to solve box constrained LCC-HVDC controller tuning problems. The tuning problem is the selection of the proportional-integral controller gains and voltage-dependant current order limiter parameters of an LCC-HVDC link subject to two operational scenarios and a set of large-signal ...
Leavy, Aaron S. C., Xu, Lie, Filizadeh, Shaahin, Gole, Aniruddha M.   +3 more
openaire   +1 more source

Adaptive Current Deviation Control and Improved VDCOL for Enhanced Fault Ride‐Through in CLCC‐HVDC Systems

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
This paper presents an integrated control strategy for enhancing fault ride‐through in CLCC‐HVDC systems. By combining adaptive current deviation control with an improved voltage‐dependent current order limitation strategy, the method leverages CLCC's controllable commutation capabilities to sustain operation and expedite recovery during fault events ...
Menghao Wen, Baohong Li, Qin Jiang, Tianqi Liu, Yingmin Zhang, Minrui Leng   +5 more
wiley   +1 more source

Subsynchronous Torsional Interaction of Wind Farms with FSIG Wind Turbines Connected to LCC-HVDC Lines

Energies, 2017
High-voltage direct current (HVDC) lines with line-commutated converter (LCC) are being increasingly employed to transmit bulk wind power over long distance.
Benfeng Gao, Ruixue Zhang, Ren Li, Hongyang Yu, Guoliang Zhao   +4 more
doaj   +1 more source

Collaborative Optimisation of Frequency Regulation Capability and Power Schedule for HVDC Interconnected Asynchronous Systems

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
A collaborative optimisation model is proposed to optimise the primary frequency regulation capabilities of flexible resources and power scheduling plans of various units. The proposed model can improve the operational flexibility of HVDC interconnected asynchronous power grids and achieve the optimal allocation of intra‐area frequency regulation ...
Yukang Shen, Wenchuan Wu, Chenhui Lin, Bin Wang, Run Huang, Yixuan Chen, Qiang Yu   +6 more
wiley   +1 more source

A low‐cost MMC submodule topology with fast DC fault handling capability

IET Power Electronics, Volume 18, Issue 1, January/December 2025.
This paper proposes a modular multilevel converter (MMC) sub‐module structure with low switching loss and fast blocking function of DC bipolar short‐circuit fault current. The proposed structure is able to output levels of three voltage levels. Compared with the traditional MMC composed of full‐bridge submodule, its fault current blocking speed is ...
Yiqi Liu, Laicheng Yin, Zhaoyu Duan, Zhenjie Li, Mingfei Ban, Jiawei Zhang   +5 more
wiley   +1 more source

Hybrid IGBT/IGCT‐Based DC‐Hub for Interconnection of VSC/LCC Future DC Networks

IET Power Electronics, Volume 18, Issue 1, January/December 2025.
ABSTRACT The interest in interconnecting multiple DC grids‐ medium‐voltage direct current/high‐voltage direct current (MVDC/HVDC)‐ across the globe has grown significantly in recent years. This interest is primarily driven by the benefits of increased reliability and cost efficiency in power transmission systems, particularly with the growing ...
Mohamed Mansour, Yousef N. Abdelaziz, Ahmed A. Aboushady, Fahad Alsokhiry, Khaled H. Ahmed, Ayman S. Abdel‐khalik, Ahmed Abdulwhab   +6 more
wiley   +1 more source

Dynamic reactive power reserve assessment method for hybrid AC/DC networks based on a reduced equivalent model of an LCC‐HVDC converter process

IET Renewable Power Generation, Volume 19, Issue 1, January/December 2025.
This paper proposes a reduced equivalent model of the dynamic process of an inverter converter, which approximates the accurate reactive power voltage dynamic process of the converter's electromagnetic transient time scale into the core reactive power dynamic process of the electromechanical transient time scale. Based on this reduced equivalent model,
Sidun Fang, Yuli Lei, Tao Niu, Guanhong Chen, Lin Xue, Wenguo Wu, Nan Feng, Yuyao Feng   +7 more
wiley   +1 more source

Nonlinear Modal Analysis of Hybrid Multi‐Terminal DC Transmission Systems Linked to Wind Farms

IET Renewable Power Generation, Volume 19, Issue 1, January/December 2025.
This paper conducts a NLMS of hybrid MTDC systems connected to wind farms, examining component interactions and their stability on impact. By using the LMS technique, it reveals insights into complex interactions under various conditions and quantifies how controller parameters affect stability in MTDC systems.
Ali Ziaei, Reza Ghazi, Roohalamin Zeinali Davarani   +2 more
wiley   +1 more source