改进瞬时无功功率模型

发布时间：2018-03-24 11:42

本文选题：瞬时无功功率理论　切入点：互补集合经验模态分解　出处：《电力学报》2016年05期

【摘要】：经理论推导出在电网电压畸变的情况下,传统的瞬时无功功率理论(p-q检测模型)的检测结果会根据电压畸变程度的不同出现不同程度的误差,i_p-i_q以及id-i_q检测模型虽然解决了这一问题,但是它里面的锁相环(PLL)与正弦发生器模块非常容易受到电压波动,频率偏移等因素的影响。对互补集合经验模态分解(ComplementaryEnsemble Empirical Mode Decomposition,CEEMD)进行了改进,将其与p-q检测模型相结合,消除p-q检测模型因电压畸变而导致的误差,之后进行建模仿真,与应用i_p-i_q模型的仿真结果进行比较,仿真结果表明,改进的瞬时无功功率模型在谐波检测方面效果更好。
[Abstract]:Under the condition of voltage distortion in power system, The traditional instantaneous reactive power theory / p-q detection model) the detection results will be different degrees of error according to the voltage distortion degree, although the detection model of id-i_q and the id-i_q detection model can solve this problem. But the PLL and sinusoidal generator modules are easily affected by voltage fluctuation, frequency offset and other factors. The complementary Ensemble Empirical Mode Decomposition (CEEMD) is improved and combined with the p-q detection model. The error caused by voltage distortion of p-q detection model is eliminated, and the simulation results are compared with those of i_p-i_q model. The simulation results show that the improved instantaneous reactive power model is more effective in harmonic detection.
【作者单位】：上海电机学院;上海电气风电设备有限公司;
【基金】：上海市教委科研创新项目(13YZ140);上海市教委重点学科(J51901)资助
【分类号】：TM935

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