scholarly journals Research on a Fault Location Method for a Pole-to-Pole Short-Circuit Fault in an LCC-MMC Hybrid DC Transmission System

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 165683-165692
Author(s):  
Chao Xing ◽  
Shengnan Li ◽  
Xinze Xi
Keyword(s):  
Fault Location ◽  
Short Circuit ◽  
Transmission System ◽  
Location Method ◽  
Short Circuit Fault

scholarly journals Fault Location Method for DC Distribution Systems Based on Parameter Identification

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1983 ◽  
Author(s):  
Yan Xu ◽  
Jingyan Liu ◽  
Weijia Jin ◽  
Yuan Fu ◽  
Hui Yang
Keyword(s):  
Parameter Identification ◽  
Distribution System ◽  
Distribution Systems ◽  
Fault Location ◽  
Fitness Function ◽  
Short Circuit ◽  
Location Method ◽  
Dc Distribution ◽  
Transition Resistance ◽  
Short Circuit Fault

When a short circuit fault occurs on the DC side line, the fault current reaches the peak within a few milliseconds, and the voltage drops significantly. This phenomenon can cause overcurrent flowing through the DC line, semiconductor devices, and AC side, which is a major threat to the operation of the entire system. To solve this problem, this paper proposes a fault location scheme based on parameter identification. Firstly, the entire DC distribution system is regarded as a graph. The intersections of the distribution system lines are regarded as vertices. The current flow of each line is regarded as a directed edge. The network topology matrix is constructed and a fault type recognition algorithm is proposed based on graph theory. Secondly, the mathematical model of the pole-to-pole short-circuit fault and pole-to-ground short-circuit fault are analyzed with double-ended electrical quantities. Transform the fault location problem into a parameter identification problem, four parameters to be identified are extracted, and the fitness function is constructed separately for two kinds of fault cases. Thirdly, a genetic algorithm (GA) is adopted to identify the value of parameters. Considering the fault types, transition resistance and fault location, the Matlab/Simulink simulation platform is used to simulate 18 fault conditions. The simulation results show that the positioning error of the fault location method is less than 1%, which is not affected by the transition resistance and has strong robustness.

Short-Circuit Fault Location Interval Recognition Criteria in Electrical System

2019 ◽  
Vol 11 ◽  
pp. 33-39
Author(s):  
Yury Ya. LYAMETS ◽  
◽  
Mikhail V. MARTYNOV ◽  
Alexander N. MASLOV ◽  
◽  
...  
Keyword(s):  
Fault Location ◽  
Short Circuit ◽  
Electrical System ◽  
Short Circuit Fault

scholarly journals Accurate Fault Location Method of the Mechanical Transmission System of Shearer Ranging Arm

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 202260-202273
Author(s):  
Qinghua Mao ◽  
Yongqiang Zhang ◽  
Xuhui Zhang ◽  
Guangming Zhang ◽  
Hongwei Fan ◽  
...  
Keyword(s):  
Fault Location ◽  
Transmission System ◽  
Mechanical Transmission ◽  
Location Method

Research on Fault Location Method for Inter-Turn Short Circuit of Turbo-generator Rotor

2019 ◽  
Author(s):  
Fuchun Sun ◽  
Jihao Wang ◽  
Ming Li ◽  
Andong Wang ◽  
Zhiwei Cao ◽  
...  
Keyword(s):  
Fault Location ◽  
Short Circuit ◽  
Location Method ◽  
Generator Rotor ◽  
Turbo Generator

A Fault Location Method in Distribution Network Based on Firefly Algorithm

2014 ◽  
Vol 971-973 ◽  
pp. 1463-1466
Author(s):  
Qian Wang ◽  
Wei Huang
Keyword(s):  
Mathematical Model ◽  
Firefly Algorithm ◽  
Fault Location ◽  
Short Circuit ◽  
Distribution Network ◽  
Convergence Criterion ◽  
Information Distortion ◽  
Location Method ◽  
Network Fault ◽  
The Impact

In the distribution network fault location, the impact of information distortion needs to be to focus on, especially when the short-circuit current is used as the fault information. Considering the distortion or failure of real-time information and other issues, the quick location method of the failure point in distribution network is analyzed. Based on the mathematical model of distribution network fault location, firefly algorithm is applied. According to the characteristics of fault location objective function in distribution network, convergence criterion is proposed, which is suitable for fault location mathematical model.

scholarly journals A Hybrid MMC Topology with dc Fault Ride-Through Capability for MTDC Transmission System

2015 ◽  
Vol 2015 ◽  
pp. 1-11
Author(s):  
Xinhan Meng ◽  
Ke-Jun Li ◽  
Zhuodi Wang ◽  
Wenning Yan ◽  
Jianguo Zhao
Keyword(s):  
Short Circuit ◽  
Harmonic Distortion ◽  
Transmission System ◽  
Simulation Software ◽  
Power System Simulation ◽  
Multilevel Converter ◽  
Harmonic Content ◽  
Dc Fault ◽  
Fault Ride Through ◽  
Short Circuit Fault

This paper proposes a hybrid modular multilevel converter (MMC) topology based on mismatched-cascade mechanism. The blocking conditions of different submodule (SM) structures under dc fault are analyzed and a series double submodule is presented. With series-double submodules and mismatched-cascade submodules, the proposed hybrid MMC can ride-through the dc side short-circuit fault and provide an output voltage with the feature of low harmonic content. This hybrid MMC topology can be used in the VSC based multiterminal dc (VSC-MTDC) transmission system. The dc fault ride-through properties of the new structure and the total harmonic distortion (THD) are analyzed compared with the previous full-bridge and clamp-double architectures. An appropriate fault blocking procedure is presented, and a typical four-terminal dc transmission simulation system is given in the power system simulation software. Finally, simulation of steady-state and dc bipolar short-circuit fault verifies that the MTDC system based on this new hybrid MMC topology is stabilized and can block the dc fault and return the nonfault parts to normal.

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