CAJ | 학술논문

电压波动是引起闪变的主要原因，因此对电压波动信号的精确检测是电压波动与闪变测量中的关键技术。文中提出了基于TDFT（Transformed Discrete Fourier Transform）变换有效值检波法来检测电压波动信号，方法的核心是对傅里叶变换的结果做简单加权变换来抑制其频谱泄漏误差，并结合相应的插值算法以实现精确检测电压波动信号。另外，文中对传统的有效值检波法对电压波动信号的获得产生的误差进行了修正，使得测量的短时闪变值的误差在允许的范围内。
전압파동시인기섬변적주요원인，인차대전압파동신호적정학검측시전압파동여섬변측량중적관건기술。문중제출료기우TDFT（Transformed Discrete Fourier Transform）변환유효치검파법래검측전압파동신호，방법적핵심시대부리협변환적결과주간단가권변환래억제기빈보설루오차，병결합상응적삽치산법이실현정학검측전압파동신호。령외，문중대전통적유효치검파법대전압파동신호적획득산생적오차진행료수정，사득측량적단시섬변치적오차재윤허적범위내。
Voltage fluctuation is the main reason for flicker, therefore makes accurate detection of the voltage fluctuation signal be the key technology in the measurement of voltage fluctuation and flicker. This paper proposes a detection method using transformed discrete Fourier transform (TDFT) based RMS detection. The core of the approach is to perform a simple weighted transformation on the result of Fourier transform to suppress the spectral leakage error, which is further combined with the appropriate interpolation algorithm to achieve accurate detection of the voltage fluctuation signal. In addition, the error generated by voltage fluctuation detection using traditional RMS detection is corrected to limit the measurement error of short-term flicker value to the allowed range.