CAJ | 학술논문

针对电压暂降特征量检测时存在的实时性差、准确度低的问题，结合数学形态学理论和d-q变换原理提出了一种基于改进单相d-q变换与形态滤波的电压暂降检测方法。研究了改进单相d-q变换算法实现原理，构造了混合形态滤波器，并给出了滤波器结构参数选择依据。仿真分析了方法在理想电压暂降波形和含谐波电压暂降波形下的检测性能，并进行了实验验证。仿真分析和实验验证结果表明运用改进单相d-q变换可以快速准确地得到暂降幅值和相位；形态滤波能够去除检测结果中非直流量，计算量小、精确度高。
침대전압잠강특정량검측시존재적실시성차、준학도저적문제，결합수학형태학이론화d-q변환원리제출료일충기우개진단상d-q변환여형태려파적전압잠강검측방법。연구료개진단상d-q변환산법실현원리，구조료혼합형태려파기，병급출료려파기결구삼수선택의거。방진분석료방법재이상전압잠강파형화함해파전압잠강파형하적검측성능，병진행료실험험증。방진분석화실험험증결과표명운용개진단상d-q변환가이쾌속준학지득도잠강폭치화상위；형태려파능구거제검측결과중비직류량，계산량소、정학도고。
Aiming at the problems of bad real time capability and low accuracy on voltage sag characteris-tic quantity detecting and combined with mathematical morphology and dq transformation, a new algo-rithm for voltage sag detection was presented, which integrates improved single-phase dq transformation with morphological filtering. The principle of improved single-phase dq transformation algorithm was stud-ied, and a mixed morphological filter was constructed with structure parameters given. The detection per-formances of the proposed method using in ideal voltage sag waveform and containing harmonic voltage sag waveform were analyzed by simulating, and the results have been verified through experiments. The re-sults of simulation analysis and experimental verification show that the amplitude and phase angle of volt-age sag can be got quickly and accurately by using improved single-phase dq transformation and mor-phological filtering is used to remove AC components which is low computational complexity and high pre-cision.