动态负荷准稳态与动态信号的模型与分解方法  

Model and decomposition of dynamic load quasi-steady state and dynamic signals

作　　者：李博 曹敏 王恩 唐标 郑玲 王学伟[2] Li Bo;Cao Min;Wang En;Tang Biao;Zheng Ling;Wang Xuewei(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 6502179 China;School of Information Science and Technology,Beijing Unwersity of Chemical Technology,Beijing 100029,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,昆明650217 [2]北京化工大学信息科学与技术学院,北京100029

出　　处：《电测与仪表》2020年第5期14-19,共6页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划课题(2016YFF0201202)。

摘　　要：针对牵引变电站等大功率动态负荷,建立了动态负荷信号随机过程的准稳态项与动态项数学模型;然后,采用二次经验模态分解方法,在小时间尺度上,对采集的牵引变电站动态负荷电流与功率随机信号进行了分解,得到了其慢速波动的准稳态项与随机快速波动的动态项。分解结果证明了文中所提出的模型结构的正确性,同时证明了分解方法的有效性。文中所提出的方法可为建立电能表动态误差特性测试信号提供依据。Aiming at the high-power dynamic loads,such as traction substations,the quasi-steady state and dynamic state mathematical models of the dynamic load signal random process are firstly established in this paper.Then,based on the second empirical mode decomposition method,the dynamic load current and power random signals of the collected traction substation are decomposed on a small time scale.And the quasi-steady state of slow fluctuation and the dynamic state of random fast fluctuation are obtained.The decomposition results prove the correctness of the proposed model structure and the effectiveness of the decomposition method.The method proposed in this paper provides a basis for determining the dynamic error characteristic test signal of the energy meter.

关 键 词：动态负荷 功率分解 模态分解 小时间尺度 

分 类 号：TM93[电气工程—电力电子与电力传动]