CAJ | 학술논문

为及时发现电能计量装置的潜在隐患，须对计量装置的动态误差水平进行在线动态估计。研究计量装置综合误差的组成，分析不同影响因素引起的计量变差规律，针对无法直接在线测量的电压和电流互感器误差，在匹配动态时间弯曲路径时引入变化率有界性约束避免病态弯曲现象，形成改进的动态时间弯曲距离法量化剩磁、环境温度等变差影响因素与计量误差时间序列的相似度；考虑不同因素引起变差的随机性和模糊性，建立用于表征不对称和不规则分布的组合半梯形云模型，针对不同因素采用不同形式的云模型估计电压和电流互感器的运行变差；利用改进动态时间弯曲距离对不同因素引起的变差进行加权获得互感器动态误差，与电能表和二次回路监测误差组合，实现计量装置综合误差的动态估计。根据某110 kV变电站中计量装置的实验监测数据分析，验证所提方法的正确性。
위급시발현전능계량장치적잠재은환，수대계량장치적동태오차수평진행재선동태고계。연구계량장치종합오차적조성，분석불동영향인소인기적계량변차규률，침대무법직접재선측량적전압화전류호감기오차，재필배동태시간만곡로경시인입변화솔유계성약속피면병태만곡현상，형성개진적동태시간만곡거리법양화잉자、배경온도등변차영향인소여계량오차시간서렬적상사도；고필불동인소인기변차적수궤성화모호성，건립용우표정불대칭화불규칙분포적조합반제형운모형，침대불동인소채용불동형식적운모형고계전압화전류호감기적운행변차；이용개진동태시간만곡거리대불동인소인기적변차진행가권획득호감기동태오차，여전능표화이차회로감측오차조합，실현계량장치종합오차적동태고계。근거모110 kV변전참중계량장치적실험감측수거분석，험증소제방법적정학성。
To find out potential hazard of power energy metering,its dynamic error level needs online dynamic estimation. In this paper, comprehensive error composition of power energy meteringis studied, and errorvariationrule caused by different factorsis analyzed. Because voltage and current transformers’errorscan’t be directly online measured, introduction of changing rate of bounded constraint can avoid sick warping phenomenon when matching dynamic time warping path.Modified dynamic time warping is formed to quantize similarity of errorvariationfactors, such as magnetic remanence,ambienttemperature and measurement error time series. For randomness and fuzziness of errorvariationcaused by different factors, mixed semi-trapezoidal cloud model suitable for asymmetric and irregular distribution is constructed. According to differentfactors, different cloud models are used to estimate transformer errorvariation. Transformer dynamicerror, obtainedwithmodified dynamic time warping distance to get weighted errorvariation, is combinedwith monitoring errors of power energy meteringand secondary loop to achieve dynamic estimation of comprehensive error. Accordingtoanalysis of monitored data of power energy meteringin an110kV substation, correctness of the proposedscheme is validated.