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Preparation of Polymer Composites with Positive Temperature Coefficient and Simulation Study on Its Current Limiting Characteristics
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Difan LIU, Shaolong ZHONG, Zhimin DANG
Insulating Materials | 2021, 54(3) : 24 - 28
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Insulating Materials | 2021, 54(3): 24-28
• Material Research •
Preparation of Polymer Composites with Positive Temperature Coefficient and Simulation Study on Its Current Limiting Characteristics
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Difan LIU, Shaolong ZHONG, Zhimin DANG
Affiliations
  • State Key Laboratory of Electric Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Published: 2021-02-20 doi: 10.16790/j.cnki.1009-9239.im.2021.03.004
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PTC resistance device, which made by positive temperature coefficient (PTC) material, can be used as a passive component to prevent overcurrent fault. In this paper, four kinds of polymer-based PTC materials were prepared by melting blending method, and the effects of conductive filler concentration, coupling agent, and supplementary conductive filler on their properties were studied. According to the temperature-resistance characteristics and heat transfer equation of polymer PTC composite, its current limiting process was simulated. The experimental results show that increasing the concentration of conductive filler will lead to the decrease of the resistivity of composite at room temperature. The PTC properties of the composites can be improved by using silane coupling agent to modify CB and adjusted by the interaction of various fillers. The simulation results show that under certain assumptions, the PTC resis-tor, as a passive component to prevent overcurrent fault, can limit the short-circuit current of power system in a short time.

PTC  /  composites  /  current limiting characteristic  /  simulation
Difan LIU, Shaolong ZHONG, Zhimin DANG. Preparation of Polymer Composites with Positive Temperature Coefficient and Simulation Study on Its Current Limiting Characteristics[J]. Insulating Materials, 2021 , 54 (3) : 24 -28 . DOI: 10.16790/j.cnki.1009-9239.im.2021.03.004
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2021.03.004
  • Receive Date：2020-05-21
  • Online Date：2026-01-26
  • Published：2021-02-20
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History
  • Received：2020-05-21
  • Revised：2020-06-06
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    State Key Laboratory of Electric Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2021.03.004
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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