基于ApFFT-NLS的振荡波下电缆介质损耗因数测试方法
A Method for Testing Dielectric Loss Factor of Cables Under Damped AC Voltage Based on ApFFT-NLS
- 高压电器 2026年
- 作者机构：
国网河北省电力公司电力科学研究院 河北 石家庄 050021
- 作者简介：
杨赛柯（1995年12月），男，博士研究生，工程师，研究方向：电力设备绝缘状态检测与故障诊断，邮箱：yangsk1204@163.com
庞先海（1983年2月），男，硕士研究生，教授级高级工程师，研究方向：电力状态检测与试验技术，邮箱：dyy_pangxh@163.com
张鹏（1993年2月），男，硕士研究生，高级工程师，研究方向：电力电缆绝缘状态检测与在线监测，邮箱：hbdyyzp@163.com
李天辉（1984年8月），男，博士研究生，教授级高级工程师，研究方向：电力状态检测与试验技术，邮箱：289803775@qq.com
- 基金信息：国网河北省电力有限公司科技项目资助(kj2024-096)
DOI：
中图分类号：收稿：2025-08-12，
修回：2025-10-16，
录用：2025-10-24，
- 稿件说明：
移动端阅览
杨赛柯, 庞先海, 张鹏, 等. 基于ApFFT-NLS的振荡波下电缆介质损耗因数测试方法[J/OL]. 高压电器, 2026.
Yang Saike, Pang Xianhai, Zhang Peng, et al. A Method for Testing Dielectric Loss Factor of Cables Under Damped AC Voltage Based on ApFFT-NLS[J/OL]. High Voltage Apparatus, 2026.
摘要
振荡波试验是电缆绝缘检测的重要手段，解决了现场试验负载容量大导致的试验设备体积庞大的问题，介质损耗因数属于电缆振荡波试验的核心测试参数之一，然而现有振荡波条件下的介质损耗因数测试精度较低（仅为1×10
-3
量级），无法满足现场测试要求。本研究提出一种基于全相位快速傅立叶变换（ApFFT）和非线性最小二乘法（NLS）算法的高准确度介损因数测试方法，与传统方法对比无需再评估振荡波系统自身误差，测量精度提升到1×10
-4
量级。测试过程需同时测量振荡波电压和电流信号，开发了可实现最小化理论相位误差的测试系统，避开了测试对象击穿引发的地电压抬升风险。通过仿真和实验验证了该测试方法的准确性和算法的稳健性，达到了现场高精度介损检测需求，为振荡波下电缆绝缘评估提供了更可靠的技术手段。
Abstract
Damped AC test is an important means for cable insulation detection
which solves the problem of large volume of test equipment caused by large load capacity in on-site tests. Dielectric loss factor is one of the core test parameters in cable damped AC tests. However
the current dielectric loss factor test accuracy under damped AC conditions is relatively low (only about 1×10
-3
level)
which cannot meet the requirements of on-site tests. This study proposes a high-accuracy dielectric loss factor test method based on all-phase fast Fourier transform (ApFFT) and nonlinear least squares (NLS) algorithm. Compared with traditional methods
it no longer needs to evaluate the error of the damped AC system itself
and the measurement accuracy is improved to 1×10
-4
level. The test process requires simultaneous measurement of damped AC voltage and current signals. A test system that can minimize theoretical phase error has been developed
avoiding the risk of ground voltage rise caused by breakdown of the test object. The accuracy of the test method and the robu
stness of the algorithm have been verified through simulation and experiments
meeting the on-site high-precision dielectric loss detection requirements and providing a more reliable technical means for cable insulation assessment under damped AC voltage.
关键词
Keywords
references
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