CAJ | 학술논문

　　针对微网中分布式电源的输出电压具有随机性、波动性等特点，分析了FFT、基波分量法、小波变换法等常见的电压波动检测方法的优缺点，在此基础上提出希尔伯特黄变换（HHT）在微网电压波动检测中的应用。为了解决经验模态分解（EMD）过程中出现的端点效应问题，采用镜像延拓法对边界进行了处理。通过Matlab算例分别对持续性电压波动和瞬时性电压波动两种情况进行了仿真分析，仿真结果表明HHT在微网电压波动检测方面具有良好的检测效果。
　　침대미망중분포식전원적수출전압구유수궤성、파동성등특점，분석료FFT、기파분량법、소파변환법등상견적전압파동검측방법적우결점，재차기출상제출희이백특황변환（HHT）재미망전압파동검측중적응용。위료해결경험모태분해（EMD）과정중출현적단점효응문제，채용경상연탁법대변계진행료처리。통과Matlab산례분별대지속성전압파동화순시성전압파동량충정황진행료방진분석，방진결과표명HHT재미망전압파동검측방면구유량호적검측효과。
In allusion to voltage of the distributed power source in the microgrid is of the characteristics of random and volatility, this paper analyzes the advantages and disadvantages of common methods detecting the fluctuation of the voltage such as FFT, the fundamental component method and wavelet analysis method. Based on this, it proposes the application of Hilbert-Huang Transform (HHT) in voltage fluctuation detection of the microgrid. In order to solve the problem of end-effect in the process of empirical mode decomposition(EMD),mirror extension is applied. Two examples with one reflecting the persistent voltage fluctuations and the other reflecting the transient voltage fluctuations are respectively simulated through Matlab, . The result verifies the practicality of the method.