Effective Method for Evaluating the Electrical Properties of DC Cable Insulation Materials

被引：0
|
作者：
Chen Z. [1 ,2 ]
Zhao P. [1 ]
Li Z. [3 ]
Ouyang B. [1 ,2 ]
Zhao J. [1 ]
Yan Y. [4 ]
机构：
[1] State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Wuhan
[2] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[3] State Grid Corporation of China, Beijing
[4] Xiamen Power Supply Company, State Grid Fujian Electric Power Company, Xiamen
来源：
Gaodianya Jishu/High Voltage Engineering | 2021年 / 47卷 / 10期
关键词：
Dielectric strength; FEM simulation; HVDC cable; Insulating material; Model cable;
D O I：
10.13336/j.1003-6520.hve.20200480
中图分类号：
学科分类号：
摘要：
With the increase of transmission capacity and voltage level, the demand for insulation performance of EHV DC is higher and higher. In the development of domestic ±535 kV DC cable, how to evaluate the electrical properties of insulating materials effectively has become a difficulty. In this paper, the electrical performance evaluation methods of flat samples, model cables and real cables of different insulating materials are studied. It is found that the electrical performance test of flat samples is difficult to characterize the electrical performance of materials after cable manufacturing, which is quite different from the performance test of cable spin slice. However, the model cable is designed based on the principle of equal field strength, and its performance test is closest to the actual cable, so it can effectively reflect the dielectric properties, processability and other comprehensive electrical resistance of cable insulation materials. Therefore, it is suggested to use model cable as a key link in the evaluation between flat sample and real cable, so as to effectively make up for the deficiency of flat sample in evaluating the electrical properties of real cable; In addition, the matching between the conductivity temperature parameter of DC cable material and accessory material is also an important parameter, which is one of the key evaluation indexes to determine whether DC cable and cable accessories can pass the type test. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：3558 / 3565
页数：7
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