状态估计在电能质量中的应用

State estimation in power quality analysis

电能质量问题随着电力电子设备的大量应用而显得十分突出,而正在发展的电能质量状态估计技术为电能质量分析提供了新的契机。但由于测量冗余度、数据同步性和网络复杂性使得电能质量状态估计不同于传统的状态估计,在估计技术的理论、算法以及一些相关的研究都有很多变化。为此,简要介绍了电能质量状态估计技术的技术特点和估计流程,并通过谐波状态估计和电压暂降状态估计两个较为成熟的研究方向进一步阐述状态估计在电能质量中的应用,最后指出了电能质量状态估计今后的研究方向及工作重点。

With the wide application of sensitive power electronic devices in industries, the power quality disturbance problem becomes more concerned. Power quality state estimation （PQSE） provides new opportunities for improving the performance of power quality analysis. However, low redundancy, non-synchronization of data, and complexity of networks have made PQSE very different from traditional power system state estimation, which means more research should be done. In this paper, the technical features of PQSE and the steps involved in the estimation were presented, and the harmonic state estimation （HSE） and voltage sag state estimation （VSSE） were discussed, as well as challenges faced by these endeavors.