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.

scholarly journals HVdc Circuit Breakers: Prospects and Challenges

2021 ◽  
Vol 11 (11) ◽  
pp. 5047
Author(s):  
Ali Raza ◽  
Ali Mustafa ◽  
Umar Alqasemi ◽  
Kumars Rouzbehi ◽  
Raheel Muzzammel ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
State Of The Art ◽  
Circuit Breaker ◽  
Wind Farms ◽  
Offshore Wind ◽  
Circuit Breakers ◽  
Offshore Wind Farms ◽  
Hvdc Transmission ◽  
High Voltage Direct Current

The integration of offshore wind farms has revitalized the interest in multi–terminal high voltage direct current (M–HVdc) transmission grids. HVdc breakers’ importance has increased as M–HVdc grids are now a commercial truth. Several HVdc circuit breaker technologies have been developed, published, and appeared as prototypes for HVdc networks. This paper summarizes the HVdc breaker technologies from the last two decades, distributed mainly in literature. A comparison of various state–of–the–art HVdc breakers is presented. Further, areas are identified where further research and development are required. The goal is to provide primary challenges and prospects in the HVdc breaker field.

scholarly journals Important Factors for Consideration during the Specification of SF6 Circuit Breakers for High Voltage Generators

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3608
Author(s):  
Avni Alidemaj ◽  
Qendrim Nika
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Circuit Breaker ◽  
Energy System ◽  
Fault Current ◽  
Current Component ◽  
Circuit Breakers ◽  
High Voltage Circuit Breaker ◽  
Short Time ◽  
A Current

This paper describes and analyzes the phenomena that occur in the case of a current interruption due to faults in the high voltage circuit breaker. That happens during connection of a generator to the network without meeting the synchronization conditions. This paper also describes and analyzes the important factors that have to be considered during the specification of SF6 circuit breakers for high voltage generators. A high direct current component in the fault current poses a major problem during such interruptions. To investigate this problem and propose possible solutions, simulations were performed on a power network model completed with the network’s data, using software such as EMTP-ATP, PSS-E and MATLAB. Various modes of operation were simulated, which are important for analyzing the strain on circuit breakers near the generator. Based on the performed simulations, it can be concluded that circuit breakers with rapid reactions in interrupting the fault current in an energy system are not always a favorable solution due to the high value of the direct current component in the fault current, which prevents the current from passing through zero within a short time.

scholarly journals Wavelet transform as a postprocessing diagnostic tool for fault identifications of high-voltage direct current transmission system

FACETS ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 17-26 ◽  
Author(s):  
P. Sanjeevikumar ◽  
Frede Blaabjerg
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Diagnostic Tool ◽  
Simulation Software ◽  
Discrete Wavelet ◽  
Transmission Network ◽  
Hvdc Transmission ◽  
High Voltage Direct Current ◽  
Ground Fault ◽  
Current Transmission

This short communication focuses on exploiting the inherent advantages of discrete wavelet transformation (DWT) as a diagnostic tool for post-processing and for identifying the faults that occur in the standard high-voltage direct-current (HVDC) transmission network. In particular, a set of investigations are developed and examined for single-line-to-ground fault on the generation and on the load side converter, and DC-link fault. For this purpose, a standard 12-pulse line-commutated converter (LCC)-HVDC transmission network along with the DWT algorithm is numerically modeled in the MATLAB/PLECS simulation software. Furthermore, in this paper, a set of designed faulty conditions are predicted using the output of DWT and the results of numerical simulation are presented. Results are in good agreement with expectations to prove that DWT is an effective tool for fault diagnostics.

Multi-Terminal High Voltage Direct Current Transmission System with DC Resonant Semiconductor Breakers

2018 ◽  
Vol 19 (3) ◽  
Author(s):  
Ryota Kinjo ◽  
Hidehito Matayoshi ◽  
Gul Ahmad Ludin ◽  
Abdul Motin Howlader ◽  
Naomitsu Urasaki ◽  
...  
Keyword(s):  
Transmission Line ◽  
High Voltage ◽  
Direct Current ◽  
Circuit Breaker ◽  
Transmission System ◽  
Electric Power System ◽  
Normal Operation ◽  
Cross Point ◽  
High Voltage Direct Current ◽  
Semiconductor Switch

AbstractIn consideration of the natural environment and depletion of energy resources, the widespread use of electric power system is expected in which the power is generated from sources of renewables such as wind and solar. When these plants are introduced in large scale, the use of broad land is required. Due to low transmission losses and small stability problems, multi-terminal high voltage direct current (MTDC) transmission becomes advantageous as long-distance power transmission system. Since DC current does not incorporate a zero cross point, therefore it’s blocking is difficult. This paper proposes a DC resonant semiconductor breaker which enables rapid fault clearance for self-excited HVDC transmission. This circuit breaker is connected as a semiconductor switch, in parallel with a group of capacitors, and resistors in the DC transmission line. The capacitor is charged to a higher voltage from the DC transmission line. For generating reverse current to allow the zero cross point in the transmission line, the semiconductor switch turns on to open the circuit breaker. After blocking, the inductance of the line is demagnetized by the resistor and fault clearing is achieved. The system except fault point can continue its normal operation.

scholarly journals A Hybrid DC Circuit Breaker with Fault-Current-Limiting Capability for VSC-HVDC Transmission System

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2388 ◽  
Author(s):  
Muhammad Ahmad ◽  
Zhixin Wang
Keyword(s):  
Energy Absorption ◽  
Direct Current ◽  
Circuit Breaker ◽  
Good Alternative ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Fault Current ◽  
Circuit Breakers ◽  
Current Limiting ◽  
Hybrid Circuit

The direct current circuit breakers are considered a promising option to protect the transmission line against commonly appearing line-to-ground fault. However, the challenges of losses in the nonoperational stage, escalation of response against fault current, and large fault current handling capability remain the debatable issues for direct current circuit breakers. This paper introduces a novel topology of the hybrid circuit breaker with fault-current-limiting characteristics, which contains three branches: the main branch, fault-current-limiting branch, and energy absorption branch. The main branch includes a mechanical switch, breaker impedance, and bidirectional power electronics switches. In the fault-current-limiting branch, a fault-current-limiting circuit is introduced which contains n numbers of bidirectional switches and current-limiting inductors, which are connected in series to make the design modular in nature. During the normal working stage, the current flows through the main branch of the breaker. Once a fault in the system is confirmed, the fault current is transferred to the fault-current-limiting branch. At this stage, the intensity of the fault current is reduced significantly using the fault-current-limiting circuit, and finally, the residual current is shifted to the energy absorption branch. The working principle, design considerations, and parametric analysis concerning the design of hybrid circuit breakers are incorporated in this paper. The performance of the proposed breaker is evaluated using a three-terminal voltage-source converter-based high-voltage direct current transmission network; for this purpose, a PSCAD/EMTDC simulation tool is used. The performance of the proposed breaker is also compared with other topologies. The comparative analysis shows that the proposed breaker is a good alternative considering high fault current interruption requirements, response time against fault current, and power losses.

Evaluation of SiC-MOSFET by Repetitive UIS Tests for Solid State Circuit Breaker

2020 ◽  
Vol 1004 ◽  
pp. 1010-1015
Author(s):  
Mitsuhiko Sagara ◽  
Keiji Wada ◽  
Shin-Ichi Nishizawa
Keyword(s):  
Solid State ◽  
Gate Voltage ◽  
Circuit Breaker ◽  
Power Device ◽  
Circuit Breakers ◽  
Solid State Circuit ◽  
Dc Circuit Breaker ◽  
Solid State Circuit Breaker ◽  
Dc Circuit Breakers

This paper investigates a degradation of SiC power device for DC circuit breaker through repetitive unclamped inductive switching (UIS) tests. Being much lower compared with Si devices, it has been considered an application for DC circuit breakers using SiC semiconductor. In order to use for the DCbreaker, it is essential to evaluate the destructive endurance for UIS test.This paper evaluates a deterioration phenomenon by paying attention to the decrease of the gate voltage of the SiC-MOSFETs under the degradation at repetitive UIS test.

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