A Novel Topology of a Liquid Metal Current Limiter for MVDC Network Applications

A liquid metal current limiter (LMCL) utilizing a fast switch and a parallel connecting path and consisting of several serial current limiting elements (CLEs) has the potential for use in a dc system. The current commutation ability is vital to the reaction time and the current limiting efficiency of this LMCL. In this paper, the characteristics of a natural current commutation driven by the arc voltage between contacts are first revealed; this method can only be applied in a low-voltage system. To fulfill the demands of a medium-voltage direct current system, an innovative LMCL topology is recommended due to the forced current commutation driven by an auxiliary magnetic induction module. A specially designed structure of magnetic coupling coils with a high coupling coefficient is proposed to improve the current commutation ability. The forced current commutation characteristic is analyzed via simulation and verified experimentally. Furthermore, the arc V–I characteristics of CLEs are deeply discussed to guide the selection of serial quantity of the CLE. Finally, a prototype for the complete LMCL is designed, assembled, and tested in the laboratory. The current limiting coefficient of the LMCL is less than 0.464, the peak value of arc voltage is approximately 6.3 kV, and the current limiting reaction time is 1.53 ms.

[1]  Karl-Heinz Hartung,et al.  Limitation of short circuit current by an IS-limiter , 2009, 2009 10th International Conference on Electrical Power Quality and Utilisation.

[2]  J. Skindhoj,et al.  Novel medium voltage fault current limiter based on polymer PTC resistors , 1999 .

[3]  Min Zhang,et al.  Analysis of a Liquid Metal Current Limiter , 2009, IEEE Transactions on Components and Packaging Technologies.

[4]  G. I. Ganev,et al.  FAULT CURRENT LIMITERS – PRINCIPLES AND APPLICATION , 2012 .

[5]  Qingquan Qiu,et al.  Magnetic Field and Characteristic Analysis of the Superconducting Fault Current Limiter for DC Applications , 2018, IEEE Transactions on Applied Superconductivity.

[6]  V. Staudt,et al.  Short-circuit protection issues in DC ship grids , 2013, 2013 IEEE Electric Ship Technologies Symposium (ESTS).

[7]  L C Cadwallader,et al.  GaInSn usage in the research laboratory. , 2008, The Review of scientific instruments.

[8]  Yi Wu,et al.  The Development of the Arc in a Liquid Metal Current Limiter , 2011, IEEE Transactions on Plasma Science.

[9]  A. Abramovitz,et al.  Survey of Solid-State Fault Current Limiters , 2012, IEEE Transactions on Power Electronics.

[10]  Fei Yang,et al.  Experimental Research and Analysis of a Novel Liquid Metal Fault Current Limiter , 2013, IEEE Transactions on Power Delivery.

[11]  Mingzhe Rong,et al.  Investigation of the Pinch Mechanism of Liquid Metal for the Current Limitation Application , 2017, IEEE Transactions on Components, Packaging and Manufacturing Technology.

[12]  Zhi-Hong Mao,et al.  Ship to Grid: Medium-Voltage DC Concepts in Theory and Practice , 2012, IEEE Power and Energy Magazine.

[13]  Wensong Yu,et al.  Active Damping of Ultrafast Mechanical Switches for Hybrid AC and DC Circuit Breakers , 2017, IEEE Transactions on Industry Applications.

[14]  Juan Manuel Mauricio,et al.  VSC-Based MVDC Railway Electrification System , 2014, IEEE Transactions on Power Delivery.

[15]  Yi Wu,et al.  Investigation of liquid metal current limiter based on a novel topology , 2017, 2017 4th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST).

[16]  Hailong He,et al.  The Arc Behavior in a Novel Kind of GaInSn Liquid Metal Current Limiting Device , 2014, IEEE Transactions on Plasma Science.

[17]  E. F. Northrup.  Some Newly Observed Manifestations of Forces in the Interior of an Electric Conductor , 1907 .

[18]  Alberto Berizzi,et al.  Short-circuit current calculations for DC systems , 1994 .

[19]  C M Franck,et al.  HVDC Circuit Breakers: A Review Identifying Future Research Needs , 2011, IEEE Transactions on Power Delivery.

[20]  K. Niayesh,et al.  A novel current limitation principle basedon application of liquid metals , 2006, IEEE Transactions on Components and Packaging Technologies.

[21]  Yang Zhuo,et al.  Investigation on the Arc Ignition Characteristics and Energy Absorption of Liquid Metal Current Limiter Based on Self-Pinch Effect* , 2016 .