Henan’an, China
Henan’an, China

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Zhang W.,University of Auckland | Wong D.,University of Auckland | Gilbert M.,University of Auckland | Gao Y.,University of Auckland | And 10 more authors.
TMS Light Metals | Year: 2011

In order to improve energy efficiency and reduce green house gas emissions, the aluminum smelting industry has been continuously working on reducing both anode effect frequency (AEF) and duration (AED). However, there is still a long way to go to achieve zero anode effect (AE) on very high amperage, low specific power consumption cells due to the added complexity of the process. A new program to quickly terminate AEs has been developed by Light Metals Research Centre, the University of Auckland, in conjunction with the efforts of the Asia Pacific Partnership on Clean Development and Climate (APP) to facilitate investment in clean technologies and to accelerate the sharing of energy efficient best practices. A pilot project was initiated to test an automatic Anode Effect Termination (AET) program on 400kA cells in Zhongfu, China. This paper demonstrates the success of the new anode effect termination (AET) program in killing AEs on this cell technology without conflicting with normal cell operations. The resulting decrease in average anode effect duration (AED) is demonstrated.


Zhu Z.Q.,Chinese Academy of Sciences | Zhu Z.Q.,CAS Institute of Electrical Engineering | Dai S.T.,Chinese Academy of Sciences | Dai S.T.,CAS Institute of Electrical Engineering | And 10 more authors.
Applied Mechanics and Materials | Year: 2013

A 10 kA HTS cable for the most transmission current in the world has been successfully demonstration developed on Sep. 26, 2012 in Gongyi, Henan Province of China. The 10 kV HTS cable is 360 meters long. This paper described the temperature measuring for the 10 kA HTS cable and the calibrated error is 0.1 K. The temperature signals of the 10 kA HTS cable conclude the high-voltage temperature signals and the low-voltage temperature signals which use the different high-precision digital voltmeters to test. Software is developed by using GENESIS 64 program. © 2013 Trans Tech Publications Ltd, Switzerland.


Dai S.,CAS Institute of Electrical Engineering | Dai S.,Chinese Academy of Sciences | Xiao L.,CAS Institute of Electrical Engineering | Xiao L.,Chinese Academy of Sciences | And 17 more authors.
Cryogenics | Year: 2014

A 10 kA/360 m warm-dielectric high-temperature superconducting direct current (DC) power cable system (10 kA cable), supported jointly the Chinese government and industrial enterprise, was developed and has been operating as a branch circuit to transmit power for a 320 kA aluminum electrolyzing production line for more than 10 months at an industrial plant in central China. Both the 10 kA cable and its supporting system of the cable system are introduced. The cryogenic system for the 10 kA cable adopts closed loop and the sub-cooled liquid nitrogen is forced to flow inside by a pump. The design of corrugated cryogenic envelope pipe is modularized and every independent module has two standardized joints, which makes it easy to integrate with the other pipes and the terminations. The heat loss sources and the structure including both the termination and the cryogenic envelope pipe of the 10 kA cable are discussed. The total heat loss of the 10 kA cable excluding the loss of cryogenic pipe for liquid nitrogen backward flowing is designed to be less than 1698 W at 10 kA, and the heat loss was compared and discussed with that of the aluminum bar. The field test and commissioning of the cable show that the 10 kA cable performs steadily and its heat loss is less than the expected value. © 2014 Elsevier Ltd. All rights reserved.


Liang X.,Central South University | Dai S.,Chinese Academy of Sciences | Dai S.,CAS Institute of Electrical Engineering | Wang Y.,North China Electrical Power University | And 6 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2010

High temperature superconducting (HTS) power cable is an effective power transmission utility with large capacity, high efficiency, and low loss, especially in DC power transmission. This paper describes the design of a 380 m HTS power cable with rated current of 10 kA for an aluminum electrolysis enterprise. The power cable connects the rectifier at a substation at one end with the bus bar of an aluminum electrolysis plant at the other end at Henan Zhongfu Industrial Co. LTD. The power cable will be energized in late of 2010. The design of the cable conductor, cryogenic envelope, termination, refrigeration, and online monitoring system of the 380 m HTS power cable are discussed in this paper. © 2006 IEEE.


Xiao L.,Chinese Academy of Sciences | Xiao L.,CAS Institute of Electrical Engineering | Dai S.,Chinese Academy of Sciences | Dai S.,CAS Institute of Electrical Engineering | And 26 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2012

The new energy revolution which will be dominated by renewable energy will need to develop a corresponding new power grid. Based on the characteristics of renewable energy resources, and the stability problem of AC network, it was proposed that the DC-based transmission grid should be developed in the future. The high Tc Superconducting (HTS) power cable will be a competitive candidate for large-capacity power transmission of renewable energy. In this paper, the progress of the development of a 360 m/10 kA HTS DC power cable is presented, and the prospects of HTS cable is discussed. © 2002-2011 IEEE.


Zhu Z.Q.,CAS Institute of Electrical Engineering | Zhu Z.Q.,Chinese Academy of Sciences | Dai S.T.,CAS Institute of Electrical Engineering | Dai S.T.,Chinese Academy of Sciences | And 16 more authors.
Applied Mechanics and Materials | Year: 2014

A 360 m/10 kA high-temperature superconducting(HTS) cable has been put into demonstration operation on September 26, 2012, which is used to supply to the electrolytic aluminum workshop 10000 A. A real-time measuring and control system for the 10 kA HTS cable is developed and completed. The critical current test and data analysis are finished before the demonstration operation of the 10 kA HTS cable. The parameters of the HTS cable are monitored in demonstration operation. The inlet and outlet temperatures of the HTS cable, which are used to calculate the loss of the HTS cable, are measured accurately. © (2014) Trans Tech Publications, Switzerland.


Liu Y.-X.,Central South University | Liang X.-M.,Central South University | Liang X.-M.,Henan Zhongfu Industrial Co. | Li J.,Central South University | And 4 more authors.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2011

Based on the target of reducing the horizontal current and vertical magnetic field strength, thereby improving the magnetohydrodynamic stability, a kind of aluminium reduction cell with vertical bottom was improved, in which the current flowed out of cathode vertically instead of horizontally. An electromagnetic simulated model of a 400 kA cell with this structure was developed by ANSYS software, and a bus bar scheme that can make the best electromagnetic field distribution was obtained after being optimized according to the computing result. Adopting this bus bar scheme, the maximum and average values of vertical magnetic flux density are 1.658 mT and 0.401 mT, respectively, which are far lower than those in traditional cells, and the MHD computation further proves that the above cell can operate stably under a small anode-cathode distance and has great potential in energy saving.


Teng Y.,CAS Institute of Electrical Engineering | Teng Y.,Chinese Academy of Sciences | Dai S.,CAS Institute of Electrical Engineering | Dai S.,Chinese Academy of Sciences | And 7 more authors.
Gaodianya Jishu/High Voltage Engineering | Year: 2012

In order to determine the insulation level both for the 10 kA DC high-temperature superconducting (HTS) cable (10 kA superconducting cable) and measurement and control system, we discussed the characteristics of structural features, electric field distribution of 10 kA HTS cable, and impact factors of the insulation level; and experimentally researched voltage withstands and the current for Pt100 platinum resistance temperature sensor. Moreover, we built a testing system compoed of a model cable and analog measurement, and tested the control loop system and withstand voltage. The results show that, the temperature sensor operates well under 5 kV, but the larger current will lead to damage the sensor; discharge will occur under high voltage between the shell of common conversion terminal and pin-linked temperature sensor, and will lead to sensor damage; thus, it is necessary to design a special terminal. Higher level insulation is required in designing 10 kA HTS cable noumenal insulation, the floating potential design should meet the insulation needs of monitoring, and the control system needs to prevent occurring of partial discharge. The voltage withstand test carried on the 10 kA HTS cable system after the integration shows that the insulation system meets operational requirements.

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