The Experts below are selected from a list of 10401 Experts worldwide ranked by ideXlab platform

Zhang Jian - One of the best experts on this subject based on the ideXlab platform.

  • analysis on Commissioning Test of 800 kv uhvdc transmission project from xiangjiaba to shanghai
    Power system technology, 2011
    Co-Authors: Zhang Jian
    Abstract:

    The Commissioning Test of ±800 kV DC transmission project from Xiangjiaba to Shanghai,which was the longest distance UHVDC transmission system with the largest capacity in the world up to now,was presented,including the calculation and analysis of the system,its Commissioning scheme,the drafting of implementation schedule for system Commissioning and circumstances during on-site system Commissioning.The Test items completed in stages during on-site Commissioning were classified,and the Test results of items belonging to each Test category were analyzed and corresponding conclusions were given.Main technical problems appearing during the Commissioning,especially the problems that were found during monopole high power Test,were analyzed in detail,and the solution of these problems guaranteed the Commissioning going on wheels and putting into operation on time.

  • Analysis on Commissioning Test of ±800 kV UHVDC Transmission Project from Xiangjiaba to Shanghai
    Power system technology, 2011
    Co-Authors: Zhang Jian
    Abstract:

    The Commissioning Test of ±800 kV DC transmission project from Xiangjiaba to Shanghai,which was the longest distance UHVDC transmission system with the largest capacity in the world up to now,was presented,including the calculation and analysis of the system,its Commissioning scheme,the drafting of implementation schedule for system Commissioning and circumstances during on-site system Commissioning.The Test items completed in stages during on-site Commissioning were classified,and the Test results of items belonging to each Test category were analyzed and corresponding conclusions were given.Main technical problems appearing during the Commissioning,especially the problems that were found during monopole high power Test,were analyzed in detail,and the solution of these problems guaranteed the Commissioning going on wheels and putting into operation on time.

  • Commissioning Test of Pole II and Bipolar System for Baode HVDC Project
    Electric Power Construction, 2010
    Co-Authors: Zhang Jian
    Abstract:

    An analysis and summary is made in this paper of the Commissioning Test of the Baoji to Deyang(abbr.Baode) HVDC project pole II and bipolar system.During the Commissioning Test,the primary and secondary equipment were Tested and performed very well.The primary equipment and the DC control and protection devices worked normally during the start/stop,protection trip,steady operation,dynamic characteristics,DC power modulation,rated power load and overload operation Test of HVDC system,and the Testing results are presented according to the design specifications.The main technical problems occurring during the Commissioning Test of the pole II and bipolar system of the Baode HVDC transmission project are analyzed in detail in this paper.The solution of those problems guaranteed the smooth execution of system Commissioning Test and in time operation of this project.

H. Higaki - One of the best experts on this subject based on the ideXlab platform.

  • Commissioning Test results of variable temperature helium refrigerator liquefier for nifs superconducting magnet Test facility
    IEEE Transactions on Applied Superconductivity, 2016
    Co-Authors: Shinji Hamaguchi, A. Iwamoto, Kazuya Takahata, Suguru Takada, Shinsaku Imagawa, Toshiyuki Mito, S. Moriuchi, K. Oba, S. Takami, H. Higaki
    Abstract:

    The superconducting magnet Test facility in the National Institute for Fusion Science has been upgraded for excitation Tests at a wide temperature range and a higher magnetic field of 13 T. As part of the upgrade, the helium refrigerator/liquefier that operated for 24 years was replaced with a variable-temperature helium refrigerator/liquefier. The required liquefaction rate is 250 L/h, and the required refrigeration capacity is 600 W at 4.5 K, same as the previous one. In addition, it has a new feature that can supply helium gas of a wide temperature range. The typical design cooling capacity is 1 kW under the condition of 20-K supply/30-K return and 1.5 kW under the condition of 40-K supply/50-K return. After the replacement, a series of Commissioning Tests were performed under the various operational conditions. From the results, the satisfactory thermodynamic performance was confirmed. In the future, it is expected that the substantial progress will be made in the development of large-scale superconducting magnets with advanced superconductors such as high-temperature superconductors and MgB2. The design of the variable-temperature helium refrigerator/liquefier and the results of the Commissioning Tests are reported in detail.

  • Commissioning Test Results of Variable-Temperature Helium Refrigerator/Liquefier for NIFS Superconducting Magnet Test Facility
    IEEE Transactions on Applied Superconductivity, 2016
    Co-Authors: Shinji Hamaguchi, A. Iwamoto, Kazuya Takahata, Suguru Takada, Shinsaku Imagawa, Toshiyuki Mito, S. Moriuchi, K. Oba, S. Takami, H. Higaki
    Abstract:

    The superconducting magnet Test facility in the National Institute for Fusion Science has been upgraded for excitation Tests at a wide temperature range and a higher magnetic field of 13 T. As part of the upgrade, the helium refrigerator/liquefier that operated for 24 years was replaced with a variable-temperature helium refrigerator/liquefier. The required liquefaction rate is 250 L/h, and the required refrigeration capacity is 600 W at 4.5 K, same as the previous one. In addition, it has a new feature that can supply helium gas of a wide temperature range. The typical design cooling capacity is 1 kW under the condition of 20-K supply/30-K return and 1.5 kW under the condition of 40-K supply/50-K return. After the replacement, a series of Commissioning Tests were performed under the various operational conditions. From the results, the satisfactory thermodynamic performance was confirmed. In the future, it is expected that the substantial progress will be made in the development of large-scale superconducting magnets with advanced superconductors such as high-temperature superconductors and MgB2. The design of the variable-temperature helium refrigerator/liquefier and the results of the Commissioning Tests are reported in detail.

Shinji Hamaguchi - One of the best experts on this subject based on the ideXlab platform.

  • Commissioning Test results of variable temperature helium refrigerator liquefier for nifs superconducting magnet Test facility
    IEEE Transactions on Applied Superconductivity, 2016
    Co-Authors: Shinji Hamaguchi, A. Iwamoto, Kazuya Takahata, Suguru Takada, Shinsaku Imagawa, Toshiyuki Mito, S. Moriuchi, K. Oba, S. Takami, H. Higaki
    Abstract:

    The superconducting magnet Test facility in the National Institute for Fusion Science has been upgraded for excitation Tests at a wide temperature range and a higher magnetic field of 13 T. As part of the upgrade, the helium refrigerator/liquefier that operated for 24 years was replaced with a variable-temperature helium refrigerator/liquefier. The required liquefaction rate is 250 L/h, and the required refrigeration capacity is 600 W at 4.5 K, same as the previous one. In addition, it has a new feature that can supply helium gas of a wide temperature range. The typical design cooling capacity is 1 kW under the condition of 20-K supply/30-K return and 1.5 kW under the condition of 40-K supply/50-K return. After the replacement, a series of Commissioning Tests were performed under the various operational conditions. From the results, the satisfactory thermodynamic performance was confirmed. In the future, it is expected that the substantial progress will be made in the development of large-scale superconducting magnets with advanced superconductors such as high-temperature superconductors and MgB2. The design of the variable-temperature helium refrigerator/liquefier and the results of the Commissioning Tests are reported in detail.

  • Commissioning Test Results of Variable-Temperature Helium Refrigerator/Liquefier for NIFS Superconducting Magnet Test Facility
    IEEE Transactions on Applied Superconductivity, 2016
    Co-Authors: Shinji Hamaguchi, A. Iwamoto, Kazuya Takahata, Suguru Takada, Shinsaku Imagawa, Toshiyuki Mito, S. Moriuchi, K. Oba, S. Takami, H. Higaki
    Abstract:

    The superconducting magnet Test facility in the National Institute for Fusion Science has been upgraded for excitation Tests at a wide temperature range and a higher magnetic field of 13 T. As part of the upgrade, the helium refrigerator/liquefier that operated for 24 years was replaced with a variable-temperature helium refrigerator/liquefier. The required liquefaction rate is 250 L/h, and the required refrigeration capacity is 600 W at 4.5 K, same as the previous one. In addition, it has a new feature that can supply helium gas of a wide temperature range. The typical design cooling capacity is 1 kW under the condition of 20-K supply/30-K return and 1.5 kW under the condition of 40-K supply/50-K return. After the replacement, a series of Commissioning Tests were performed under the various operational conditions. From the results, the satisfactory thermodynamic performance was confirmed. In the future, it is expected that the substantial progress will be made in the development of large-scale superconducting magnets with advanced superconductors such as high-temperature superconductors and MgB2. The design of the variable-temperature helium refrigerator/liquefier and the results of the Commissioning Tests are reported in detail.

Yang Wanka - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of ±1100 kV UHVDC System Commissioning Test Technology
    2015
    Co-Authors: Yang Wanka
    Abstract:

    The ±1 100 k V ultra high-voltage direct current(UHVDC) transmission pilot project located in the Zhundong of Xinjiang Province to the south of Anhui Province, with the advantages of highest transmission power, the highest voltage level and the longest distance of transmission power in the world, was briefly summarized. The study contents and work contents of ±1 100 k V UHVDC project system Commissioning Test were analyzed. According to ±800 k V UHVDC project system Commissioning Test study achievements and system Test experiences on site, and combining with the features of ±1 100 k V UHVDC pilot project, the calculation analysis of ±1 100 k V UHVDC project system was carried out, which included system analysis of ±1 100 k V UHVDC project feeding in power system, system stability calculation analysis, over voltage calculation analysis and ±1 100 k V UHVDC control and protection simulation calculation. The system safety and stability control strategy, over voltage control strategy, ±1 100 k V UHVDC control and protection strategy were proposed based on system calculation results above description, which was to provide technical support for preparing ±1 100 k V UHVDC system Commissioning Test program by combining to the characteristics of ±1 100 k V UHVDC high/low voltage converter spilt connection with 500 k V/1 000 k V AC gird on inverter side.

  • System Commissioning Test Program of ±800 kV UHVDC Transmission Project From Tianshan to Zhongzhou
    Power system technology, 2015
    Co-Authors: Yang Wanka
    Abstract:

    The ±800 k V UHVDC power transmission project from Tianshan located in the Xinjiang Uygur Autonomous Region in China to Zhongzhou located in Central China(abbr. TZ UHVDC project) is the first UHVDC power transmission system with the transmission capacity up to8 000 MW and the transmission distance up to 2 191.5 km in the world. Up to now the Commissioning Test for TZ UHVDC project is the first time to inspect the equipment performance of the primary equipment with the highest engineering transmission capacity in the world and it is also the first time to validate the control and protection functions for the totally domestically manufactured UHVDC transmission equipment,besides, it is also the first time to carry out the system Commissioning for UHVDC transmission project under such a condition that in its sending power grid the capability to outwards transmit the electric power generated by renewable energy sources is weak. Based on these distinctive properties,the contents of Commissioning Test scheme for TZ UHVDC project are researched, including the purpose of the Commissioning Test, the conditions of AC and DC systems, the contents of the Commissioning and operation schedules, the AC and DC signals to be measured during the Commissioning, the acceptance standard and the measures to ensure the security during the Commissioning. Using the reference of Testing and operation experiences of such ±800 k V UHVDC power transmission systems as the UHVDC power transmission project from Xiangjiaba to Shanghai and the UHVDC power transmission project from Jinping to Sunan, several Tests related to the control system as well as the Test of DC magnetic biasing are added and the control of bus voltage at rectifier side is analyzed and researched, thus the Test items of the Commissioning Test are determined and the system Commissioning scheme are drafted. Results of engineering Commissioning Test show that the proposed system Commissioning scheme can meet the demands of technical specifications, and it is ensured for the TZ UHVDC project to be put into operation successfully on schedule.

Yin Yong-hua - One of the best experts on this subject based on the ideXlab platform.

  • Commissioning Test on the 1000 kV UHV AC Demonstration Project and Operation Monitoring of the Main Equipments
    2012
    Co-Authors: Shu Yinbiao, Yin Yong-hua, Han Xiancai, Wang Shaowu, Wang Xiaogang, Zhao Hong-guang, Sun Gang, Guan Lan
    Abstract:

    SUMMARY The 1000 kV Jindongnan-Nanyang-Jingmen UHV AC demonstration project developed by State Grid Corporation of China is the first UHV project in the country. The successful construction of this project is of great significance to the reliability of China’s electric power supply, and to the research and application of UHV transmission technology around the world. This paper has provided an overview of the Commissioning Test, including the research and determination of Commissioning plan, Testing results, and the evaluation to operation status of main equipments. Commissioning Test is the initial work before putting the project into the commercial operation. To guarantee the success of the Tests, State Grid has started the research and preparation at the beginning of the construction. The final system Test has been confirmed based on a large amount of calculation and optimization, including 15 experiments of three different types. Voltage-raising experiments have been conducted to Test the insulation of UHV equipments, to verify the polarity of CVT and CT, and to check the accuracy of relay protections. Such experiments should be taken in small isolated systems due to the requirement for the safety of equipments and systems. When taking experiments on the 1000 kV UHV AC transmission system, it is necessary to avoid generators' self-excitation phenomenon, otherwise it would damage power equipments due to the higher over-voltage. Meanwhile, there are several 500 kV substations from generating units to UHV substations. The safety of Central and North China power grids must be maintained once the bus bar of any 500 kV station is isolated from the nominal system. The experiments on equipments switching have been conducted to Test the capability of UHV circuit breakers and switching of electrical equipments, to check protective actions, and to measure the switching over-voltage. There are four Test items confirmed eventually with the

  • Completion of Control and Protection Functions in 3GS HVDC Project System Commissioning Test
    Power system technology, 2008
    Co-Authors: Yin Yong-hua
    Abstract:

    The Commissioning Test procedure of the HVDC power transmission project from the Three Gorges Hydropower Station to China that interconnects Central China Power Grid with East China Power Grid is described in brief. The protective function of metallic return transfer breaker (MRTB) installed in DC site of Yidu converter station is analyzed.Some suggestions to the improvement of MRTB protection to perfect the protective function of MRTB are proposed. The DC transmission line protection, the DC pole bus differential protection and DC neutral bus differential protection are researched and the conclusion of artificial grounding fault of DC transmission line is given. The Test results on losing substation auxiliary power supply as well as the reason causing maloperation of DC bipolar neutral bus differential protection during the Test are analyzed, and corresponding improving measures are put forward. By means of solving above-mentioned technical problems, the control and protection functions of the Three Gorges to Shanghai (abbr. 3GS) HVDC interconnection project is completed and the accomplishment of the system Commissioning Test as well as putting the 3GS project into operation are ensured.

  • Summary of 750 kV Pilot Project System Commissioning Test
    Advances of Power System & Hydroelectric Engineering, 2007
    Co-Authors: Yin Yong-hua
    Abstract:

    The 750 kV transmission pilot project system Commissioning Test in Northwest of China included GuanTing 750 kV transmission substation,LanZhouDong transmission substation and 750 kV transmission line of 140 km.The contents of 750 kV system Commissioning Test were divided into two parts.The first part was the 750 kV system Commissioning Test program,and the second part was the 750 kV system Commissioning measurement scheme.The system Commissioning Test program including Test items and Test contents were introduced in this paper.The system Commissioning measurement scheme was briefly introduced.The results of system Commissioning Test were briefly analyzed.The conclusions were given in the end.