【作者】 冯力鸿；

【导师】 徐永海；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2008， 硕士

【摘要】 本论文对感应式和电子式电能计量表的结构、计量原理进行了介绍,分析了谐波对计量表准确性的影响,并从谐波功率方向、频率波动以及多个谐波源时的计量问题等3个方面分析了计量模式对电能表计量的影响及当前计量模式的不合理性。利用MATLAB为仿真平台,完成了对电子式电能表的仿真模型搭建,并完成谐波电能计量表的模型,能够准确计量谐波功率的大小及方向,通过仿真验证了谐波对电能计量准确性的影响。针对频率波动时的计量问题,提出了应用汉宁窗插值修正算法的计量方法,通过计算仿真,该方法能够有效的校正计量偏差问题。最后,本文提出了应用偏最小二乘回归模型的电能计量模式,该方法能够较为准确的识别线性负荷、非线性负荷以及系统所发出的谐波功率,可较好解决当前计量模式不合理的问题。更多还原

【Abstract】 The structure and working principle of induction watt-hour meter and electrical meter has been introduced. The error of electric measurement has been analyzed based on the working principle and measurement on harmonic. The impact of power meter has been analyzed from the following three aspects of the problem which are Power harmonic direction, frequency fluctuations and the promble of many harmonic sourses. The irrationality of measurement model has been pointed. The model of electrical meter and the model of harmonic meter hasve been completed by MATLAB. The harmonic meter can measure the direction and amplitude exactly. The impact of harmonic for power meter has been simulated. The paper provides the power meter model of Hannning windowing, which can solve the problem of frequency fluctuations. It has been proved by simulation. At last, the new measurement model has been provided which using the model of Partial least-squares regression. The new model can distinguish harmonic power which comes from the linear load, nonlinear load and system. The irrational problem of measurement model has been solved.更多还原