CAJ | 학술논문

介质损耗是反映高电压电气设备绝缘受潮、劣化变质或气体放电等绝缘状况的重要指标,其准确测量对于电力系统安全、经济运行有着重要意义.针对高电压电气设备介质损耗在线监测的技术要求,本文提出了ADS8364+TMS320F2812的介损测量装置构成方案,详细介绍了六路同步采样ADC的数据采集单元和以TMS320F2812为核心的数据处理单元电路设计.传统FFT方法进行介损测量容易产生频谱泄漏和栅栏效应,影响测量的精度,而加窗插值FFT修正算法可以明显提高测量结果的准确性,消除频谱泄漏和栅栏效应引起的误差.为此本装置采用基于Hanning窗插值FFT算法实现介损准确测量与分析.仿真结果表明,基于Hanning窗插值FFT算法的介损测量装置能有效克服谐波干扰、基波频率波动、采样点数变化及噪声干扰的影响,试验结果验证基于Hanning窗插值FFT算法的介损测量装置测试介损结果精确,且受频率波动的影响较小.
개질손모시반영고전압전기설비절연수조、열화변질혹기체방전등절연상황적중요지표,기준학측량대우전력계통안전、경제운행유착중요의의.침대고전압전기설비개질손모재선감측적기술요구,본문제출료ADS8364+TMS320F2812적개손측량장치구성방안,상세개소료륙로동보채양ADC적수거채집단원화이TMS320F2812위핵심적수거처리단원전로설계.전통FFT방법진행개손측량용역산생빈보설루화책란효응,영향측량적정도,이가창삽치FFT수정산법가이명현제고측량결과적준학성,소제빈보설루화책란효응인기적오차.위차본장치채용기우Hanning창삽치FFT산법실현개손준학측량여분석.방진결과표명,기우Hanning창삽치FFT산법적개손측량장치능유효극복해파간우、기파빈솔파동、채양점수변화급조성간우적영향,시험결과험증기우Hanning창삽치FFT산법적개손측량장치측시개손결과정학,차수빈솔파동적영향교소.
Dielectric loss is a key indicator,reflecting insulation damping,deterioration or gas discharge of high-voltage electrical equipment insulation.Its accurate measurement is very important for the power system security and economy.According to the technology requirement of high-voltage electrical equipment,this paper has designed a dielectric loss measuring device,with its hardware based on ADS8364 and TMS320F2812.The hardware system is demiled,such as the sampling module and the data-processing module.The Harming Window FFT Interpolation Algorithm is more advantageous than the traditional FFT algorithm in the dielectric loss measurement,as it can significantly improve the measurement accuracy of results,eliminating effects of spectrum leakage and fence.Therefore,it is used to accurately measure and analysis dielectric loss.Simulation and experimental results show that the device is accurate and stable,which can overcome the interference of the harmonics,frequency fluctuations and the impact of noise.