CROSS-LINKING PERFORMANCE CONSISTENCY CHARACTERIZATION METHOD FOR CROSS-LINKED POLYETHYLENE 500 KV CABLE INSULATION MATERIAL

The present invention relates to the technical field of high voltage and insulation and discloses a cross-linking performance consistency characterization method for 500 kV cross-linked polyethylene cable insulation material. The characterization method includes the following steps: (1) preparing a standard sample: fully stirring and mixing low-density polyethylene and dicumyl peroxide at 63-67°C, and standing to fully diffuse the dicumyl peroxide into the low-density polyethylene; (2) testing, by using a torque rheometer, a cross-linking reaction kinetic curve of the standard sample and a sample to be tested; and (3) eliminating, by using a standard sample transformation method, a difference introduced due to different test places into the cross-linking reaction kinetic curves of the sample. By using the method, cross-linking reaction properties of the 500 kV cross-linked polyethylene cable insulation material are effectively characterized, thereby solving the problem of accurate comparison of results at different test places.