SF6 is widely used in the main insulation of current transformers at 66 kV and above due to its superior insulation performance. However, in the context of global climate change, SF6 will be more strictly restricted. Therefore, developing new environmentally friendly current transformers suitable for high voltage levels is crucial for the green development of China's power grid. Based on the traditional SF6 inverted current transformer structure, this article adopts a colorless, odorless, non-toxic, and highly degradable clean air Blue as an environmentally friendly insulation material, and designs and develops a prototype of a 110 kV inverted current transformer. This mainly includes two aspects. Firstly, a simulation model of a 110 kV inverted current transformer was constructed, and the maximum internal electric field strength values under different load conditions were compared and analyzed. The study found that as the load current increased, the electric field strengthened. At a 120% load rate, the electric field strength value was 13.3 kV/mm; The second is to compare the measurement accuracy of the environmentally friendly current transformer, traditional inverted transformer, and SF6 current transformer designed in this article under different load conditions. Through experiments, it is found that the current transformer designed in this article has a maximum difference of 33.33% and 17.65% compared to the traditional inverted transformer and SF6 current transformer, and a maximum increase of 23.87% and 8.16% in angle difference, respectively, The experimental results show that the proposed design scheme meets the measurement accuracy of 0.1S level.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.