西安高压电器研究院股份有限公司，西安 710077
中国西电电气股份有限公司，西安 710075）
收稿：2026-05-13，
修回：2026-06-03，
纸质出版：2026-08-25
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LIU Biao, XIAO Guo, JIA Hua, et al. Research Progress on High-temperature Energy Storage Properties and Carrier Transport Regulation of Polypropylene Films[J]. Power Capacitor & Reactive Power Compensation, 2026, 47(4): 76-90. DOI： 10.14044/j.1674-1757.pcrpc.2026.04.010.
薄膜电容器是柔性直流输电、新能源并网等领域的核心设备，承担稳压支撑、直流滤波、无功补偿等关键作用。目前，高端直流干式电容器及高性能聚丙烯（PP）介质薄膜在核心应用场景仍主要依赖进口，国外企业在材料配方、薄膜加工与装备制造环节形成系统性技术壁垒，制约了我国电力设备供应链的自主可控发展。高温储能特性是国产薄膜与国外先进产品的主要差距之一，高温下PP分子链段热运动加剧，热激活载流子输运显著增强，导致电导损耗上升、击穿强度衰减。本文系统综述了纳米复合、全有机复合和表面修饰三类改性策略的最新研究进展，重点从载流子产生-迁移-复合全过程剖析了不同方法的高温调控机制及其与储能性能的构效关系。结合国产化需求，指出了当前研究的科学瓶颈与技术挑战，为突破PP薄膜高温性能短板、支撑行业自主可控发展提供科学依据。
Film capacitors are core equipment in fields such as VSC-HVDC transmission and renewable energy grid integration
undertaking such critical functionsas voltage stabilization support
DC filtering and reactive power compensation. At present
high-end DC dry-type capacitors and high-performance polypropylene (PP) dielectric films in core application scenarios still rely predominantly on imports. Foreign enterprises have established systemic technological barriers in material formulation
film processing
and equipment manufacturing
which constrain the development of a self-controllable supply chain for power equipment in China. High-temperature energy storage performance is one of the main gaps between the domestic polypropylene (PP) films and advanced foreign products. At elevated temperatures
the intensified thermal motion of PP molecular chain segments and the significantly enhanced transport of thermally activated charge carriers lead to increased conduction loss and reduced breakdown strength. In this paper
the recent progress of such three modification strategies as nanocomposite modification
all-organic composite modification and surface modification is systematically reviewed. Emphasis is placed on the systematic analysis of the entire process of carrier generation
migration
and recombination
aiming to reveal the hightemperature modulation mechanisms of various modification strategies and their corresponding structureperformance correlations with energy storage properties. Considering the national demand for localization
this paper identifies the prevailing scientific bottlenecks and technical hurdles
providing a scientific foundation for addressing the high-temperature performance deficiences of PP films and for supporting the independent and controllable development of the power equipment industry.
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