scholarly journals Dynamic reactive power characteristic analysis of inverters under the commutation failure faults in HVDC systems

2021 ◽  
Author(s):  
Wen Hua ◽  
Hongtao Xiong ◽  
Yongzhi Zhou ◽  
Rui Lou
Keyword(s):  
Reactive Power ◽  
Power Characteristic ◽  
Characteristic Analysis ◽  
Commutation Failure

Reactive Power Compensation Method of HVDC Commutation Failure

2014 ◽  
Vol 536-537 ◽  
pp. 1510-1513
Author(s):  
Xiao Ming Wang ◽  
Qi Zhang ◽  
Bin Qian
Keyword(s):  
Reactive Power ◽  
Voltage Drop ◽  
Critical Value ◽  
Reactive Power Compensation ◽  
Transmission System ◽  
Critical Voltage ◽  
High Voltage Direct Current ◽  
Commutation Failure ◽  
The Difference ◽  
Bus Voltage

In the high-voltage direct current transmission system, the difference value between the landing phase voltage and DC transmission system commutation failure of the critical voltage drop value, as system occurred in the critical value of commutation failure. When commutation voltage lower than the critical value would reduce arc Angle, caused by commutation failure。Therefore, by using the method of reactive power compensation to keep converter bus voltage stability, can avoid commutation failure.

scholarly journals Transient reactive power characteristics of HVDC during commutation failure and impact of HVDC control parameters

2017 ◽  
Vol 2017 (13) ◽  
pp. 1134-1139 ◽  
Author(s):  
Jingzhe Tu ◽  
Yan Pan ◽  
Jian Zhang ◽  
Bing Zeng ◽  
Junchuan Jia ◽  
...  
Keyword(s):  
Reactive Power ◽  
Control Parameters ◽  
Power Characteristics ◽  
Commutation Failure

The Output Characteristic Analysis for Wind Turbine Based Two Control Strategies

2016 ◽  
Vol 851 ◽  
pp. 439-444
Author(s):  
Ping Li ◽  
Xu Wang ◽  
Hui Zhen Zhang
Keyword(s):  
Power Control ◽  
Wind Turbine ◽  
Wind Farm ◽  
Reactive Power ◽  
Voltage Control ◽  
Output Characteristic ◽  
Normal Operation ◽  
Well Performance ◽  
Characteristic Analysis ◽  
Reactive Power Control

For studied the rule of wind turbine output characteristic in condition of variable wind. The paper set up a wind model for a wind farm and a simulation model of 1.5MW wind turbine. Choose two control tactics which called voltage control and reactive power control to do the simulation and test. The result shows that took reactive power control at normal operation, the turbine get a well performance. If fault happened, choose voltage control was reasonable. So it provide reference for turbine operation.

Assessment of Reactive Power Reserve for DC Continuous Commutation Failure

2021 ◽  
Author(s):  
Yingjie Chen ◽  
Hui Liu ◽  
Qian Chen ◽  
Wei Xu ◽  
Junjun Yang
Keyword(s):  
Reactive Power ◽  
Commutation Failure

scholarly journals Research on Dynamic Reactive Power Compensation Scheme for Inhibiting Subsequent Commutation Failure of MIDC

2021 ◽  
Vol 13 (14) ◽  
pp. 7829
Author(s):  
Yifan Zhang ◽  
Fei Tang ◽  
Fanghua Qin ◽  
Yu Li ◽  
Xin Gao ◽  
...  
Keyword(s):  
Reactive Power ◽  
Inhibitory Effect ◽  
Economic Benefits ◽  
Reactive Power Compensation ◽  
Normal Operation ◽  
Voltage Fluctuation ◽  
Commutation Failure ◽  
Bus Voltage ◽  
Configuration Scheme ◽  
Voltage Support

Commutation failure at the inverter side of an MIDC (multi-infeed HVDC) is usually caused by AC system faults. Suppose the converter bus voltage cannot recover to the normal operation level in time: in that case, the commutation failure will then develop into more severe subsequent commutation failures or even DC blocking, which will severely threaten the security and stability of the system. Dynamic reactive power compensation equipment (DRPCE) can offer voltage support during accident recovery, stabilize voltage fluctuation and inhibit any subsequent commutation failure risk. This paper proposes the optimal DRPCE configuration scheme for maximizing both inhibitory effect and economic performance. The simulation results on MATLAB-BPA prove the scheme’s correctness and rationality, which can effectively inhibit the risk of subsequent commutation failure and obtain economic benefits.

The Characteristic Analysis of Electromagnetic and AC Loss for a High Temperature Superconducting Adjustable Reactor with Considering the Structure of Superconducting Winding

2014 ◽  
Vol 960-961 ◽  
pp. 665-669
Author(s):  
Meng Song ◽  
Shi Feng Shen ◽  
Nan Nan Hu ◽  
Kun Nan Cao ◽  
Li Ren
Keyword(s):  
High Temperature ◽  
Magnetic Flux ◽  
High Temperature Superconductor ◽  
Reactive Power ◽  
Transmission Loss ◽  
Structure Design ◽  
Ac Loss ◽  
Characteristic Analysis ◽  
High Voltage Transmission Line ◽  
Controllable Reactor

The power equipments made of high-temperature superconductor (HTS) widely applied in power system in the recent years. A HTS adjustable reactor (HTS-AR) is a novel controllable reactor with the controllable windings made of HTS tapes. Shunt HTS-AR can regulate the reactive power of power and reduce the transmission loss. However, the leakage magnetic flux of the superconducting windings is relatively large, which may restrict the application of the HTS-AR in high-voltage transmission line. Basing on the research of the structure design for HTS winding, the characteristic analysis of magnetic and AC loss of HTS-AR with considering the structure of superconducting winding is shown in this study. The results show that the HTS winding with the ladder-like structure has a better performance compares with HTS winding with the solenoid structure.

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