Developmental Research on Prospective Power Transmission System Integrated under Superconducting Environment

超导环境下集成输电系统的未来发展研究

基本信息

批准号：
03555051
负责人：
KITO Yukio
金额：
$ 10.3万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

This developmental research project aims at verifying the technical possibility of superconducting power transmission for the next generation. For this purpose, a prospective power transmission model system integrated under superconduction environment, abbreviated to PROMISE, has been constructed in trial. The PROMISE consists of a superconducting-transformer, -fault current limiter, and -cable. These three apparatus are enclosed in a long scaled cryostat to keep them at the liquid helium temperature, 4.2 K.The target of its transmission capacity is 6 kV - 1500 kVA.Performance tests were carried out 6 times during the 3-year research project. Major results obtained are as follows :1. It has been proved by a few times of synthetic tests that the PROMISE has the transmission capacity of 6 kV - 1000 kVA, which is the first achievement in the world. The circulating current of 177 A was successfully sustained under impression of 6 kV of line-to-ground voltage to the high tension side.2. The … More superconducting fault current limiter actually presented excellent current limiting performance to prevent the other apparatus from falling into abnormal quenching due to large fault current. This means that quenching current level coordination is realized by the current limiter in the future superconducting power transmission.3. The injection technique of large volume of liquid helium was established for the whole PROMISE cryostat of 854 liters with the cable section of 5 m as well as the substation section. The thermal invasion into the cryostat due to heat conduction along the power leads occupies 75 to 90 % of the total one.4. Drastic degradation of dynamic ac voltage withstand level of liquid helium was actually found when a number of bubbles occurred due to heating of quenched part in a superconducting wire.5. The area and volume effects experimentally emerged on the breakdown voltage of liquid nitrogen. The results were theoretically supported with statistical analyzes using Weibull distribution. Less

该发展研究项目旨在验证下一代超导电力传输的技术可能性。为此，在试验中已经构建了一个缩写为承诺的超导压环境中集成的前瞻性动力传输模型系统。该诺言由超导转换器，-fault电流限制器和 - 可解。这三个设备以长度缩放的低温恒温器封闭，以使其保持在液氦温度下，4.2K。其传输能力的目标为6 kV -1500 kVa。在3年的研究项目中，进行了6次绩效测试。获得的主要结果如下：1。几次合成测试证明了这一承诺的传输能力为6 kV -1000 kVa，这是世界上的第一个成就。 177 A的循环电流成功地在向高张力侧的6 kV线对地面电压的印象下持续了。2。 …更超导故障电流限制器实际上表现出了出色的电流限制性能，以防止由于大断层电流而导致其他设备掉落异常的淬火。这意味着，在未来的超导电源传输中，当前限制器实现了电流水平的协调。3。为854升的整个Promise Cryostat建立了大量液体氦气的注射技术，其电缆截面为5 m以及底物部分。由于沿功率导致热传导引起的热量侵入冷冻仪，占总1的75％至90％。当由于超导线中的淬火部分加热而发生多个气泡时，动态交流电压承受液体氦气的急剧下降实际发现。5。实验效应在液氮的崩溃电压上出现。理论上使用Weibull分布对结果进行了统计分析的支持。较少的