Dielectric loss monitoring digital algorithm for solid-insulated ring main unit

被引：0
作者：
机构：
[1] School of Electrical Engineering, Shenyang University of Technology
来源：
Cao, Y. (caoyundong@hotmail.com) | 1600年 / Science Press卷 / 40期
关键词：
Capacitive current; Dielectric loss; Instantaneous power transform; Orthogonal decomposition; Resistive current; Solid-insulated ring main unit;
D O I：
10.13336/j.1003-6520.hve.2014.05.025
中图分类号：
学科分类号：
摘要：
Dielectric loss online monitoring system for solid-insulated sleeves in solid-insulated ring main unit has disadvantages of its poor anti-interference ability, strict synchronous sampling criterion and low calculation resolution, which may affect its monitoring precision. To reduce this influence, we proposed to apply instantaneous power transform theory to obtain dielectric loss and instantaneously extract resistive current and capacitive current by signal decomposition, hence to realize dynamic dielectric loss monitoring. Combined with an improved filter design, high precision of the monitoring was achieved. We also designed and established a monitoring system to test our design. The results show that the system can manage its relative online monitoring error within 3%, and the proposed method can effectively reduce the error due to spectral leakage and fence effect which are caused by asynchronous and non-integral period sampling.
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页码：1468 / 1474
页数：6
相关论文
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