本项目建议采用准静水压的方式，对于室温高压力状况下的聚合固体电介质的介电特性、空间电荷行为特性进行综合测量研究，最高压力为500 MPa，并将采用压激电流（Piezo-Stimulated Current, PieSC）法测量与研究聚合物电介质中的空间电荷陷阱与相应的载流子特性。本项研究所需要高压力主机系统已经基本设计加工完成，本项目需设计研制适用于在高压力下进行聚合物固体介质介电特性、空间电荷特性、以及压激电流谱测量研究的几种试样腔。在测量几种主要聚合物绝缘电介质随高压力变化时的介电频谱；在不同的高压力情况特性下测量聚乙烯的空间行为；在改变所线性升高或者降低静水压同时外加直流高压的情况下测量由压力诱发的微弱压激电流。因此可以提出压激电流理论模型，分析得出介质内部的载流子特性，并得知聚合物电介质中的空间电荷陷阱特性。在以上研究的基础上，对于高压力下的聚合物介电特性进行综合研究。

In the project, it is proposed to measure and to research the characters of polymer dielectrics under high pressure in room temperature by quasi-hydrostatic pressure. The max pressure should be up to 500 MPa. The dielectric spectrum in large frequency range under variable high pressure will be measured and researched for several kinds of polymer dielectrics. The space charge behavior of polyethelene under high pressure will be measured and researched under high pressure. Piezo-Stimulated Current method will be used to research the trap of space charge and the characters of carriers in polymer. The high pressure system for the project have been designed and prepared. In this project, chambers for dielectric spectrum measurement, space charge measurement, Piezo-Stimulated Current measurements under high pressure will be researched and prepared. The dielectric spectrum of several kinds of polymer dielectrics under varying high pressure will be obtained in this project. The space charge behavior of polyethene under high pressure (up to 500 MPa) and high field (up to 40kV/mm) will be researched. For the PieSC measurement, it should be increased and decreased the hydrostatic pressure in the polymer dielectrics sample lineally, accurately and slowly, until 500MPa. The speed of increasing or decreasing hydrostatic pressure should be controlled accurately. At the same time, it needs to applied high voltage on the sample and to measure the very weak current from the sample that is stimulated by the external pressure. Then, it should be to present the theory of Piezo Stimulated Current to analysis the carrier and space charge in the polymer dielectrics, for example, to distinguish the electron carrier and the ion carrier. To get the trap level of space charge in polymer sample. On above research, the dielectric properties of polymer dielectrics under high pressure will be studied synthetically.