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Breakthrough progress in the first and second integration of Zhejiang Skyline Power Distribution

Breakthrough progress in the first and second integration of Zhejiang Skyline Power Distribution

Release time:
2017/10/16 17:22
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[Abstract]:
On May 18, 2017, the three-phase zero-sequence current sensor and the resistance-capacitor voltage-divider voltage sensor independently developed by Zhejiang Skyline Transformer Co., Ltd. passed the t
On May 18, 2017, the three-phase zero-sequence current sensor and the resistance-capacitor voltage-divider voltage sensor independently developed by Zhejiang Skyline Transformer Co., Ltd. passed the type test of Xi'an High-voltage Electric Apparatus Research Institute, and the capacitor voltage divider power supply output voltage transformer It has passed the type test in the quality supervision and inspection of national electrical products, and all the performances meet the requirements of national and industrial standards.
 
    In addition, a full range of current and voltage transformers and sensors have been tested in the factory and ring network cabinets, on-column switches, including bulk accuracy test, -40~+70oC variable temperature accuracy test, power frequency withstand voltage Test, partial discharge test, lightning impulse test, retesting body accuracy test, accuracy test after assembly to switch box and ring network cabinet, simulation of grid-connected power-on interference test, accuracy test with cable, etc., stable and reliable performance, Fully meet the requirements of one or two fusion technology solutions.
 
    Since 2016, the State Grid Corporation initiated a secondary integration project for distribution networks to solve the problem of automatic distribution of incremental equipment distribution and one-time equipment mismatch in the scale construction and transformation of distribution networks. Electronic current and voltage sensors have become the core equipment for project development due to the high-precision conversion of their signals.
 
    Over the years, Zhejiang Skyline has been cooperating with universities such as China Metrology University to develop electronic sensors, which are rich in technology and practice. In order to promote this project quickly and in depth, State Grid Corporation has established three R&D project teams. As the third group member, Zhejiang Skyline actively participates in program discussion, technical confirmation, test method verification, and standard setting. It has independently solved the accuracy of the resistance of the resistor divider voltage sensor to the ground, the accuracy of the capacitor divider voltage sensor, the accuracy of the sensor drift, the accuracy offset caused by electromagnetic interference, and the second open circuit risk of the current sensor. And the electronic sensor withstand voltage, partial discharge, lightning impulse test does not meet the standard requirements and other problems that have plagued the industry for many years.