Short-Circuit and Ground Fault Analyses and Location in VSC-Based DC Network Cables

Yang, Jin; Fletcher, John; O’Reilly, J.

doi:10.1109/tie.2011.2162712

Cited by 693 publications

(420 citation statements)

References 29 publications

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“…As an example it will be presented the impact of the S11 open switch fault. In this situation [18][19][20] voltage vectors are not available anymore. Fig.…”

Section: Hvdc In Fault Conditionsmentioning

confidence: 99%

Study of the HVDC dual transmission system under faults in the power converters

Santos

Pires

Silva

2016

2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)

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Abstract-HVDC transmission systems based on voltage source converters have lately emerged as a good alternative to conventional AC transmission. In these transmission systems multilevel converters have become a promising energy conversion technology. The reliability of the power converters are extremely important since a fault in these equipments may lead to an unavailability for a long period of the transmission system. Thus, this paper will focuses in HVDC dual transmission system under semiconductor failure conditions. As presented in this paper this structure presents interesting characteristics under the point of view the reliability considering a power semiconductor failure. It will present the consequences for the transmission system when there is a semiconductor fault. A study for the change of the modulation system in order to ensure DC link capacitors voltage balance under a fault condition is also presented. Simulation studies are shown in order to confirm the characteristics of the proposed methodology in normal and fault condition mode.

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“…As an example it will be presented the impact of the S11 open switch fault. In this situation [18][19][20] voltage vectors are not available anymore. Fig.…”

Section: Hvdc In Fault Conditionsmentioning

confidence: 99%

Study of the HVDC dual transmission system under faults in the power converters

Santos

Pires

Silva

2016

2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)

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show abstract

“…All of the diodes are blocked because of the reverse voltage. As a result, the AC system is separated from the DC side, and the AC current drops to zero [6]. If a SFCL is not used, the fault characteristic can be divided into four stages [16], which are shown in Figure 3.…”

Section: Analysis Of Fault Characteristic In the DC Distribution Systmentioning

confidence: 99%

“…In this case, the VSC turns into an uncontrolled rectifier, as the freewheeling diodes will feed the fault [6]. In the meantime, the DC-link capacitance discharges, and the DC current rises rapidly to a relatively large value, which may be dozens of times the normal one and poses a considerable threat with respect to the safety issue.…”

Section: Introductionmentioning

confidence: 99%

Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter

et al. 2015

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A DC distribution system, which is suitable for access to distributed power generation and DC loads, is one of the development directions in power systems. Furthermore, it could greatly improve the energy efficiency and reduce the loss of power transportation. The huge short circuit current is always a great threat to the safety of the components, especially the capacitors and diodes. A resistive superconductive fault current limiter (SFCL), which could respond quickly once a fault happens and limit the fault current to a relatively low level, becomes a good solution to this problem. In this paper, the operational principle of the resistive SFCL is introduced first, and then, the DC short-circuit fault characteristic of the DC distribution system with the SFCL is analyzed and the effectiveness of the SFCL verified. In order to realize the selectivity of the protection in the DC distribution system with SFCL, a new transient current protection principle based on Ip (the peak value of the current) and tp (the transient time that the current takes to reach its peak value) is proposed. Finally, a model of a 10-kV DC distribution system with an SFCL is established and simulated in PSCAD/METDC. Simulation results have demonstrated the validity of the analysis and protection principle.

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“…The fault period is generally divided into three stages [16,17]: the capacitor discharge stage, the diode freewheel stage and the grid side current feeding stage.…”

Section: Fault Characteristic Analysis In Vsc-hvdc Systemsmentioning

confidence: 99%

Research on fast solid state DC breaker based on a natural current zero-crossing point

Xiang

Hua

Wen

et al. 2014

J. Mod. Power Syst. Clean Energy

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The DC fault characteristics of voltage source converter based high voltage direct current (VSC-HVDC) systems are analyzed in this paper. The phenomenon whereby the capacitor on DC side discharges quickly during a DC fault contributes to a large short-circuit fault current. Neither traditional DC breakers nor DC switches can cut off the fault current under this condition. A fast solid state DC breaker design method is proposed in this paper. This method is based on the fault current characteristics of the inverter in multi-terminal HVDC systems (MTDC), where a fault current appears at the natural zerocrossing point near the inverter. At this point, by coordinating the AC breakers near the rectifier, the DC breaker could reliably cut off the DC fault current and protect the system. A detailed model for this fast solid state DC breaker and its operation sequence are studied, based on this design method. Simulations modeling a five-terminal meshed DC grid and a fast DC breaker were carried out with PSCAD/EMTDC using this design method. The results from the simulations confirmed the validity of the design method.

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Short-Circuit and Ground Fault Analyses and Location in VSC-Based DC Network Cables

Cited by 693 publications

References 29 publications

Study of the HVDC dual transmission system under faults in the power converters

Study of the HVDC dual transmission system under faults in the power converters

Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter

Research on fast solid state DC breaker based on a natural current zero-crossing point

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