scholarly journals A Zero Crossing Hybrid Bidirectional DC Circuit Breaker for HVDC Transmission Systems

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1349
Author(s):  
Geon Kim ◽  
Jin Sung Lee ◽  
Jin Hyo Park ◽  
Hyun Duck Choi ◽  
Myoung Jin Lee
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
High Power ◽  
Circuit Breaker ◽  
Fault Current ◽  
Line Load ◽  
Zero Crossing ◽  
Hvdc Transmission ◽  
Dc Circuit Breaker ◽  
Current Flows

With the increasing demand for renewable energy power generation systems, high-power DC transmission technology is drawing considerable attention. As a result, stability issues associated with high power DC transmission have been highlighted. One of these problems is the fault current that appears when a fault occurs in the transmission line. If the fault current flows in the transmission line, it has a serious adverse effect on the rectifier stage, inverter stage and transmission line load. This makes the transmission technology less reliable and can lead to secondary problems such as fire. Therefore, fault current must be managed safely. DC circuit breaker technology has been proposed to solve this problem. However, conventional technologies generally do not take into account the effects of fault current on the transmission line, and their efficiency is relatively low. The purpose of this study is to introduce an improved DC circuit breaker that uses a blocking inductor to minimize the effect of fault current on the transmission line. It also uses a ground inductor to efficiently manage the LC resonant current and dissipate residual current. DC circuit breakers minimize adverse effects on external elements and transmission lines because the use of elements placed on each is distinct. All of these processes are precisely verified by conducting simulation under 200 MVA (±100 kV) conditions based on the VSC-based HVDC transmission link. In addition, the mechanism was explained by analyzing the simulation results to increase the reliability of the circuit in this paper.

scholarly journals Solid-State DC Circuit Breakers and their Comparison in Modular Multilevel Converter Based-HVDC Transmission System

Electronics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1204
Author(s):  
Gul Ahmad Ludin ◽  
Mohammad Amin Amin ◽  
Hidehito Matayoshi ◽  
Shriram S. Rangarajan ◽  
Ashraf M. Hemeida ◽  
...  
Keyword(s):  
Solid State ◽  
High Voltage ◽  
Direct Current ◽  
Circuit Breaker ◽  
Transmission System ◽  
Simulation Software ◽  
Fault Current ◽  
Circuit Breakers ◽  
Hvdc Transmission ◽  
Dc Circuit Breakers

This paper proposes a new and surge-less solid-state direct current (DC) circuit breaker in a high-voltage direct current (HVDC) transmission system to clear the short-circuit fault. The main purpose is the fast interruption and surge-voltage and over-current suppression capability analysis of the breaker during the fault. The breaker is equipped with series insulated-gate bipolar transistor (IGBT) switches to mitigate the stress of high voltage on the switches. Instead of conventional metal oxide varistor (MOV), the resistance–capacitance freewheeling diodes branch is used to bypass the high fault current and repress the over-voltage across the circuit breaker. The topology and different operation modes of the proposed breaker are discussed. In addition, to verify the effectiveness of the proposed circuit breaker, it is compared with two other types of surge-less solid-state DC circuit breakers in terms of surge-voltage and over-current suppression. For this purpose, MATLAB Simulink simulation software is used. The system is designed for the transmission of 20 MW power over a 120 km distance where the voltage of the transmission line is 220 kV. The results show that the fault current is interrupted in a very short time and the surge-voltage and over-current across the proposed breaker are considerably reduced compared to other topologies.

A Novel Forced Resonant Mechanical DC Circuit Breaker by Using Auxiliary Oscillation Switch for Zero-crossing

2021 ◽  
pp. 1-1
Author(s):  
Lei Qi ◽  
Xilin Chen ◽  
Xinyuan Qu ◽  
Liangtao Zhan ◽  
Xiangyu Zhang ◽  
...  
Keyword(s):  
Circuit Breaker ◽  
Zero Crossing ◽  
Dc Circuit Breaker

A modular hybrid DC circuit breaker with fault current self-adaptive control and protection coordination

2022 ◽  
Vol 134 ◽  
pp. 107434
Author(s):  
Shimin Xue ◽  
Baibing Liu ◽  
Shouxiang Wang ◽  
Xiao Chen ◽  
Xiaoshuai Zhu ◽  
...  
Keyword(s):  
Adaptive Control ◽  
Circuit Breaker ◽  
Fault Current ◽  
Dc Circuit Breaker ◽  
Self Adaptive

Design and Simulation of Breaking Time Sequence for DC Circuit Breaker with a Current-Limiting Inductance

2014 ◽  
Vol 556-562 ◽  
pp. 1959-1963
Author(s):  
Si Ming Wei ◽  
Yi Gong Zhang ◽  
Huan Liu ◽  
Zhi Qiang Dai ◽  
Xiao Du
Keyword(s):  
Design Method ◽  
Circuit Breaker ◽  
Time Sequence ◽  
Fault Current ◽  
Distribution Grid ◽  
Current Limiting ◽  
Selection Principles ◽  
Dc Circuit Breaker ◽  
Breaking Time ◽  
A Current

It is great significance for development of MTDC (Multi-terminal HVDC) to build DC transmission and distribution grids. However, the relatively low impedance in DC grids makes the fault penetration much faster and deeper .Consequently, fast and reliable DC circuit breaker is needed to isolate faults. Breaking time and other parameters are important for a breaker to achieve its goals. This paper presents a DC circuit breaker with a current-limiting inductance and gets the rising and falling characteristics of fault current. Based on the characteristics, a design method of breaking time sequence will be given, as well as the calculation of current-limiting inductance and the selection principles of arresters. A 10kV DC distribution grid is modeled and simulated by PSCAD/EMTDC to verify that the method can meet the requirements of breaking fault current quickly and reliably.

scholarly journals A New Topology of a Fast Proactive Hybrid DC Circuit Breaker for MT-HVDC Grids

2019 ◽  
Vol 11 (16) ◽  
pp. 4493 ◽  
Author(s):  
Fazel Mohammadi ◽  
Gholam-Abbas Nazri ◽  
Mehrdad Saif
Keyword(s):  
Circuit Breaker ◽  
Injection Technique ◽  
Fault Current ◽  
Current Interruption ◽  
Hvdc System ◽  
Switching Power ◽  
Dc Fault ◽  
Simulation Based ◽  
Dc Circuit Breaker ◽  
Converter Topology

One of the major challenges toward the reliable and safe operation of the Multi-Terminal HVDC (MT-HVDC) grids arises from the need for a very fast DC-side protection system to detect, identify, and interrupt the DC faults. Utilizing DC Circuit Breakers (CBs) to isolate the faulty line and using a converter topology to interrupt the DC fault current are the two practical ways to clear the DC fault without causing a large loss of power infeed. This paper presents a new topology of a fast proactive Hybrid DC Circuit Breaker (HDCCB) to isolate the DC faults in MT-HVDC grids in case of fault current interruption, along with lowering the conduction losses and lowering the interruption time. The proposed topology is based on the inverse current injection technique using a diode and a capacitor to enforce the fault current to zero. Also, in case of bidirectional fault current interruption, the diode and capacitor prevent changing their polarities after identifying the direction of fault current, and this can be used to reduce the interruption time accordingly. Different modes of operation of the proposed topology are presented in detail and tested in a simulation-based system. Compared to the conventional DC CB, the proposed topology has increased the breaking current capability, and reduced the interruption time, as well as lowering the on-state switching power losses. To check and verify the performance and efficiency of the proposed topology, a DC-link representing a DC-pole of an MT-HVDC system is simulated and analyzed in the PSCAD/EMTDC environment. The simulation results verify the robustness and effectiveness of the proposed HDCCB in improving the overall performance of MT-HVDC systems and increasing the reliability of the DC grids.

scholarly journals Successful fault current interruption on DC circuit breaker

2016 ◽  
Vol 9 (2) ◽  
pp. 207-218 ◽  
Author(s):  
Yunhai Shan ◽  
Tee C. Lim ◽  
Barry W. Williams ◽  
Stephen J. Finney
Keyword(s):  
Circuit Breaker ◽  
Fault Current ◽  
Current Interruption ◽  
Dc Circuit Breaker
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