The Chinese people will never forget the "6.30" the beijing-shanghai high-speed railway big in a remarkable opening day, but can't forget the "7.23" heavy wenzhou railway traffic accident, the barrage of accident not only shows the beijing-shanghai high-speed rail link of catenary and power supply system of weak problem, but also exposed the high-speed power testing equipment and technology of China. Other countries sneers is still in the ear, researchers in our country should strengthen the high-speed rail power supply cable safety protection measures, not only more high-end equipment from abroad learn advanced technology in pcb copy board, to put forward a series of domestic practice verified high and new technical measures and constructive improvement plan.
Failure analysis of our country's high-speed rail power supply cable
The 27.5 kV and 10 kV ac high-speed rail power supply cable is part of the introduction of European and Japanese high-speed rail technology. Part in the digestion and absorption, the technology of high-speed PCB copy board design and construction of walking on the combination of a lot of detours, leading to a high single core iron, the technology of the power supply cable run fail requirements should be also failed to catch up with the international level. According to the survey, in 2010 of a high-speed 44 in the sudden blackouts are breakdown caused by the middle joint, the insulation resistance of the single core cable outer sheath to fulfill the requirements of national standard and cause widespread damage problem of cable fault point detection difficult and water branch is also the important reason for the failure.
Imported high-speed cable testing equipment development
In the face of China's long, large high-speed rail safety operation of the grim situation, in order to not to let China's high-speed rail accidents frequent power outages, in order to make China's high-speed rail is not affected by bad weather such as thunder and lightning. Shenzhen dragon reverse research group (www.pcbwork.net) is a professional engaged in double side, multi-layer PCB copy board (board) cloning, change boards, BOM list, backstepping principle diagram, PCB production, chip decryption, prototype production, SMT processing, professional for domestic and foreign customers to provide electronic products complete solutions for high-tech enterprises. In order to narrow the gap between products and high-end technology abroad, our long-term use of PCB copy board reverse research means for imported equipment localization development. View of the present status of the high-speed cable testing equipment technology, series of dragon people introduced German advanced high-speed cable testing equipment, such as cable fault tester, wire and cable outer sheath high impedance fault locator, cable dielectric loss tester and other equipment for PCB copy board and second development innovation research, as shown in the figure below:
Cable dielectric loss tester for PCB copy board of high-speed cable tester performance study
Research suggests that the health status of cable outer sheath state evaluation is very necessary, can effectively reduce the water water invasion and the branch lead to premature aging equipment. Cable outer sheath tester for outstanding contribution is: adherence to the door, the invasion of cable to the detriment of running water. Its main role is: outer sheath withstand voltage test, the outer sheath fault pre-position and accurate positioning, etc.
In addition a portable dielectric loss tester is very suitable for rated voltage 3 kv - 20 kv cable insulation aging state of science evaluation, and its brand pure sine wave ultra-low frequency of 0.1 Hz ac withstand voltage test system compatible, from cable equipment database connection can timely discover and identify to overhaul to replace aging cable completely, avoid sudden power failure due to aging of cable system. The instrument can not only detect insulation defects in advance, can also be connected directly to the VLF test system, the rapid measurement of dielectric loss value of the object to be tested and store the result.
Dragon who has successfully completed the series instrument PCB copy board reverse innovation research, not only to master the principle diagram of the PCB document, bom, core technologies such as data, and in the process of reverse research further PCB design and development, achieve rapid upgrading equipment, at the same time in many localization in the practical application to the deficiency existing in China's high-speed rail equipment able to "leak fill a vacancy" role.
