Electric Power Research Institute, China Southern Power Grid

Lingmeng Fan

Wenbo Zhu

Mingli Fu

Lei Jia

Shuai Hou

Baojun Hui

Yunpeng Zhan

Bin Feng

Xiaolin Li

Yifan Zhang

Jie Liu

An antioxidant addition device for a 500 kV cross-linked polyethylene insulating material includes a heating hopper module and a heat-insulation conduit module. The heating hopper module includes an inlet port, a heating jacket, a material bin, and a filter screen. The heat-insulation conduit module includes a liquid metering pump, a stainless steel liquid-conduit, a heat-insulation unit, and an outlet port. The antioxidant is added into the material bin through the inlet port, heated in the material bin to a liquid phase antioxidant, filtered through the filter screen, then metered by the liquid metering pump, then passed into the stainless steel liquid-conduit, and finally discharged through the outlet port for use.

Antioxidant addition device and method for 500 kV cross-linked polyethylene insulating material

The present application provides a high-voltage cable insulation material continuous extrusion processing characteristic evaluation and optimization method and apparatus. The method comprises: continuously extruding a material under test as a melt, measuring and recording an inlet pressure P, a mass growth rate w, and the diameter D' of a melt sample strip, and obtaining apparent shear viscosity η(t) (step A1); obtaining an outlet expansion rate δ (step A2); recording and displaying curves η(t) and δ(t), and treating the time corresponding to an increase of a set percentage on the curves as a cross-linking starting time TX (step A3); selecting a reference sample for testing, and determining a cross-linking reaction starting time TS according to η(t) and δ(t) curves of the reference sample (step A4); and defining an index α according to Tx and Ts.

High-voltage cable insulation material continuous extrusion processing characteristic evaluation and optimization method and apparatus

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Guangzhou, China

Lingmeng Fan