Results 41 to 50 of about 246 (86)

Research on optimized control strategy for LCC-CLCC Receiving-End under different Degrees of Three-Phase fault conditions

International Journal of Electrical Power & Energy Systems
Compared with traditional Line-Commutated Converters (LCCs), the Controllable Line-Commutated Converter (CLCC) exhibits a significantly enhanced immunity to commutation failures.
Weiru Wang, Yuxuan Li, Tuo Wang, Yechun Xin, Guoqing Li, Hairun Guo   +5 more
doaj   +1 more source

StudyofHVDCPiecewiseVariableRateVDCOLBasedonSimplexAlgorithm

工程科学与技术, 2015
:In order to improve the performance of failure recovery characteristic of the HVDC,a novel VDCOL control method named piecewise-variable-rate VDCOL is proposed based on the study of VDCOL’s influence on the HVDC system’s reactive power consumption and ...
冯明, 李兴源, 李妮, 王超, 洪潮   +4 more
doaj  

有利于多馈入系统恢复的自适应变结构VDCOL控制

Gaoya dianqi, 2016
针对多馈入直流系统故障后难以快速恢复的问题,提出了一种基于模糊理论,并融合多馈入直流特性的自适应变结构VDCOL控制策略。该控制方法将模糊控制的非线性特性与VDCOL控制机理有效结合,同时将多条直流自身的强度和相互作用考虑在内,根据电压大小及其恢复水平对直流电流进行动态控制,协调系统的电压和功率恢复。仿真结果表明:该控制方法能够有效控制恢复期间的无功需求,抑制后续换相失败发生,加快系统的恢复,保证系统的安全稳定运行。
胡松伶, 王渝红, 李兴源
doaj  

Real-Time Implementation of an Automatic Voltage Stabilizer for HVDC Control

, 2012
Classic HVDC systems are prone to voltage instability when operating on weak AC grids. Certain methods are available to cope with weak system conditions, one of which is VDCOL.
Kuehn, Walter, Weyrich, Kim, Vanfretti, Luigi, Leelaruji, Rujiroj   +3 more
core   +1 more source

直流控制对逆变器无功调节特性影响的研究

Gaoya dianqi, 2016
为了改善直流逆变站的无功功率特性,合理利用直流系统本身的无功调节特性来提升弱受端系统的电压稳定性,对直流控制方式与逆变器无功需求之间的关系进行了比较详细的分析。基于弱受端直流系统模型,首先根据直流系统Ud-Id特性曲线分析得到直流系统各种可能的控制模式下的无功特性,以及各控制模式对无功功率的调节能力;然后分析了熄弧角裕度、VDCOL参数、控制器调节速度这3种因素对逆变器无功调节的影响,并根据仿真结果总结了它们的调节规律及作用范围。对弱受端直流系统无功调节策略的确定具有一定的指导意义。
李妮, 李兴源, 冯明, 洪潮, 王超   +4 more
doaj  

Fallas de Conmutación en HVDC: Origen, Efectos y Mitigación [PDF]

, 2010
Los nuevos proyectos energéticos que se planifica desarrollar en la XI región de Aysén han planteado el desafío de transportar grandes bloques de potencia a través de largas distancias, hacia los centros de consumo que se concentran en el SIC.
González Farías, Alejandro Raúl
core  

Modeling of Efficient Control Strategies for LCC-HVDC Systems: A Case Study of Matiari-Lahore HVDC Power Transmission Line. [PDF]

Sensors (Basel), 2022
Ahmed A, Khan D, Khan AM, Mustafa MU, Panjwani MK, Hanan M, Agyekum EB, Uhunamure SE, Edokpayi JN.   +8 more
europepmc   +1 more source

A Virtual Resistance-Capacitance Control Strategy for Mitigating Consecutive Commutation Failures in Weak Receiving-End HVDC Systems

Energies
In view of the high susceptibility of weak receiving-end High-Voltage Direct Current (HVDC) systems to consecutive commutation failures during AC faults on the inverter side, a novel virtual resistance-capacitance control strategy is proposed.
Bin Zhang, Shi-Hao Yin, Shi-Xian Hui, Ming-Liang Yang, Xiao-Wei Deng, Guang-Tao Feng, Wei Liu   +6 more
semanticscholar   +1 more source

Examiner

, 2006
In this Master’s project, a simplified control model for HVDC classic has been built in the EMTDC simulation program with PSCAD v.4.2 interface. The control functions in the simplified control are based on functions from ABB Power Systems.
Professor Stefan Östlund, Jonas Karlsson   +1 more
core  

Modélisation et commande des systèmes de transmission HVDC

, 2013
Pour des raisons environnementales, techniques et économiques, l'installation des lignes HVDC est favorisée afin de maximiser l'efficacité de transmission d'électricité.

core