scholarly journals Research on DC Protection Strategy in Multi-Terminal Hybrid HVDC System

Engineering ◽  
2021 ◽  
Author(s):  
Yuping Zheng ◽  
Jiawei He ◽  
Bin Li ◽  
Tonghua Wu ◽  
Wei Dai ◽  
...  
Keyword(s):  
Protection Strategy ◽  
Hvdc System

Development of Back-to-Back Flexible HVDC Prototype Based on MMC

2013 ◽  
Vol 397-400 ◽  
pp. 1808-1813
Author(s):  
Cheng Feng ◽  
Da Li Wang ◽  
Jin Li
Keyword(s):  
Circuit Design ◽  
High Power ◽  
Working Condition ◽  
Protection Strategy ◽  
Hvdc System ◽  
Fault Protection ◽  
The World

With the development of flexible HVDC technology in the world, back-to-back HVDC system based on MMC topology have more attention. A high power back-to-back flexible HVDC prototype has been developed to assess performance and reliability of construction of converter valve segment. Valve normal working condition (rated conditions rated voltage, current, temperature), valve transient working condition (temporary overvoltage, overcurrent), valve fault protection and anti-interference ability are accessed. Performance and reliability of control and protection equipment are assessed. The design of control and protection strategy is optimized. The correctness of main circuit design is tested.

scholarly journals Adaptability and Countermeasures of HVDC line protection under the UHVDC system with multiple receiving ends

2021 ◽  
Vol 256 ◽  
pp. 01005
Author(s):  
Zhengguang Chen ◽  
Xingguo Wang ◽  
Shuyang Wang ◽  
Hong Cao
Keyword(s):  
Structural Characteristics ◽  
Series Connection ◽  
Protection Strategy ◽  
Hvdc System ◽  
Hvdc Line ◽  
In Series ◽  
Closed Line ◽  
Output Characteristics ◽  
Geographical Locations ◽  
Mode A

In UHVDC transmission system, the inverter station is located in different geographical locations, and there are two sections of lines in single pole of HVDC system, which brings challenges to the traditional closed line protection. In this paper, firstly, the structural characteristics of series connection mode and the output characteristics of each converter in case of line fault are analysed, and the adaptability of conventional line protection in series multiple receiving ends system is studied. According to the characteristics of UHVDC system with multiple receiving ends in series connection mode, a hierarchical protection strategy is proposed and verified in PSCAD model.

A Novel Protection of Transmission Lines for Two ±500kV HVDC Systems Erected on the same Tower

2011 ◽  
Vol 383-390 ◽  
pp. 3669-3674
Author(s):  
Min Huang ◽  
Gang Wang ◽  
Hui Hui Luo ◽  
Yuan Sheng Liang
Keyword(s):  
Transmission Lines ◽  
Mutual Influence ◽  
Long Distance ◽  
Decoupling Method ◽  
Protection Strategy ◽  
Hvdc System ◽  
Hvdc Transmission ◽  
Protection Scheme ◽  
Novel Method ◽  
Mutual Induction

Up to now, there is no precedent of applying two bipole lines (TBL) on the same tower technology of long-distance HVDC transmission project in the world. Owing to mutual influence between the two HVDC circuits on the same tower, the traditional protection of transmission line is faced with technical difficulties on fault pole identification, especially high grounded fault loop impedance. A new protection scheme of transmission lines for the double ±500kV HVDC circuits on the same tower is proposed. Based on electromagnetic decoupling method for TBL on same tower is proposed by analyzed the characteristic of coupling mutual induction, a four module components is proposed to decouple the network equation and analyze the fault modal network. On this basis, a novel method of fault pole identification based on the polarity comparison of line-mode back traveling wave is proposed. It has been made that validates the advantage of this novel protection strategy to identify the fault pole by simulation of PSCAD/EMTDC on the model of the TBL ±500kV HVDC system on the same tower in Xiluodu-Guangdong China.

scholarly journals Feasible protection strategy for HVDC system by means of SFCL and passive resonance DC breaker

2019 ◽  
Vol 2019 (16) ◽  
pp. 767-770
Author(s):  
Ho-Yun Lee ◽  
Mansoor Asif ◽  
Kyu-Hoon Park ◽  
Bang-Wook Lee
Keyword(s):  
Protection Strategy ◽  
Hvdc System ◽  
Dc Breaker

Cloud Provider's Response to Multiple Models of Attack Behaviors

2019 ◽  
Vol 13 (4) ◽  
pp. 325-333
Author(s):  
Xu Liu ◽  
Xiaoqiang Di ◽  
Jinqing Li ◽  
Huamin Yang ◽  
Ligang Cong ◽  
...  
Keyword(s):  
Stackelberg Game ◽  
Multiple Models ◽  
Theoretic Model ◽  
Cloud Provider ◽  
Game Model ◽  
Attack Behavior ◽  
Behavior Model ◽  
Protection Strategy ◽  
Behavior Models ◽  
Optimal Protection

Background: User behavior models have been widely used to simulate attack behaviors in the security domain. We revised all patents related to response to attack behavior models. How to decide the protected target against multiple models of attack behaviors is studied. Methods: We utilize one perfect rational and three bounded rational behavior models to simulate attack behaviors in cloud computing, and then investigate cloud provider’s response based on Stackelberg game. The cloud provider plays the role of defender and it is assumed to be intelligent enough to predict the attack behavior model. Based on the prediction accuracy, two schemes are built in two situations. Results: If the defender can predict the attack behavior model accurately, a single-objective game model is built to find the optimal protection strategy; otherwise, a multi-objective game model is built to find the optimal protection strategy. Conclusion: The numerical results prove that the game theoretic model performs better in the corresponding situation.

Sign in / Sign up

Export Citation Format

Share Document