Results 31 to 40 of about 103 (62)

Transient overvoltage suppression of LCC‐HVDC sending‐end system based on DC current control optimisation

IET Energy Systems Integration, Volume 6, Issue 2, Page 182-195, June 2024.
Abstract The receiving‐end system AC fault of the line‐commutated‐converter‐based high voltage direct current (LCC‐HVDC) will lead to commutation failure of the inverter side. During the fault and its recovery, AC transient low voltage and transient overvoltage (TOV) will occur in the sending‐end system.
Yang Wang, Jianhang Zhu, Yingbiao Li, Jiabing Hu, Shicong Ma, Tiezhu Wang   +5 more
wiley   +1 more source

Establishment of safety power range and subsequent commutation failure suppression strategy for hybrid cascaded HVDC system

International Journal of Electrical Power & Energy Systems
The hybrid cascaded high-voltage direct current (HC-HVDC) system integrates the benefits of both LCC and MMC technologies. However, the inverter LCC is prone to suffer subsequent commutation failure (SCF) when an AC fault occurs. Therefore, a coordinated
He Wang, Jiazhi Guo, Jing Bian, Guoqing Li, Tuo Wang   +4 more
doaj   +1 more source

A fast and high‐accurate commutation failure identification method for LCC‐HVDC system

High Voltage, Volume 9, Issue 3, Page 721-732, June 2024.
Abstract Commutation failure (CF) is one of the most common issues in line‐commuted converter‐based high voltage direct current systems (LCC‐HVDC), leading to critical power system security and stability problems. Accurate and rapid identification of CF is crucial to prevent subsequent CF in HVDC systems. However, the existing CF identification methods
Jing Feng, Zhijie Liu, Kejun Li, Bingkun Li, Jiachen Li, Liangzi Li   +5 more
wiley   +1 more source

A modified control strategy for LCC with IGCT‐based full‐bridge submodules to solve the commutation failure issues

IET Power Electronics, Volume 17, Issue 2, Page 183-198, 5 February 2024.
The paper proposes a hybrid solution combining the LCC inverter with the continuously controlled IGCT‐based full‐bridge submodules (FBSMs) to solve the CF issues. The scheme can provide the LCC inverter with an additional commutation area, and compensate for the phase‐shift of the grid voltage under faults.
Yindi Liu, Xiangjun Zeng, Yiping Luo, Haitao Qu   +3 more
wiley   +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  

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

Study of Resistive-Type Superconducting Fault Current Limiters for a Hybrid High Voltage Direct Current System. [PDF]

Materials (Basel), 2018
Chen L, He H, Li G, Chen H, Wang L, Chen X, Tian X, Xu Y, Ren L, Tang Y.   +9 more
europepmc   +1 more source

An Interactive Control Strategy of STATCOM and VDCOL for Suppressing Weak Receiving Commutation Failure of HVDC

2021 IEEE 4th International Electrical and Energy Conference (CIEEC), 2021
In order to reduce the probability of commutation failure in HVDC weak receiving system, and improve the recovery characteristics of the DC system after a fault, an interactive control strategy of STATCOM and VDCOL (Voltage Dependent Current Order Limiter) was proposed.
Chao Xing, Xinze Xi, Xin He, Zhi Xu, Shengnan Li, Chuan Xiang   +5 more
openaire   +2 more sources

VDCOL parameters setting influenced by reactive power characteristics of HVDC system

2016 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE), 2016
Voltage dependent current order limiter (VDCOL) can limit the HVDC current in low voltage and reduce the reactive power requirement, which helps power system quickly restore stability. Thus, the reasonable setting of VDCOL control parameters is vital to improve the recovery characteristics of system.
Yao-Jia Li, Juan-Juan Wang, Zi-Lin Li, Chuang Fu   +3 more
openaire   +2 more sources

Study of An Adaptive Fuzzy VDCOL Control Strategy for Coordinated Recovery of Multi-feed-in HVDC System

2010 Asia-Pacific Power and Energy Engineering Conference, 2010
An adaptive fuzzy voltage dependent current order limiter (VDCOL) to enhance the performance of a multi-feed-in HVDC system is proposed in this paper. The adaptive fuzzy VDCOL exports an adaptive current order through fuzzy rules which need one point's voltage of HVDC transmission line and its derivative to time.
Dachun Yang, Tianqi Liu, Xingyuan Li, Xiaoyan Zhou, Fan Tang   +4 more
openaire   +2 more sources