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arXiv 2012.06069eess.SYcs.SY
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基于扩展无迹卡尔曼滤波器的电力系统动态状态估计

Power System Dynamic State Estimation Using Extended and Unscented Kalman Filters

Narayan Bhusal, Mukesh Gautam

摘要:

电力系统动态特性的准确估计对于提高电力系统的可靠性、弹性、安全性和稳定性具有重要意义。随着基于逆变器的分布式能源的日益集成,对于电力系统的适当控制和操作,电力系统动态的知识变得比以往任何时候都更加必要和关键。虽然测量设备和传输技术的最新进展已经显著地减少了测量和传输误差,但是这些测量仍然不能完全摆脱测量噪声。因此,噪声测量需要被过滤以获得准确的电力系统操作动态。在这项工作中,电力系统的动态状态估计使用扩展卡尔曼滤波器(EKF)和无迹卡尔曼滤波器(UKF)。我们对西部电力协调委员会(WECC)的$3$ -机$9$ -总线系统和新英格兰$10$ -机$39$ -总线进行了案例研究.结果表明,UKF和EKF能够准确估计电力系统动态特性。最后给出了EKF和UKF在测试情况下的性能比较。其他卡尔曼滤波技术以及基于机器学习的估计器将很快在本报告中更新。所有源代码,包括Newton Raphson潮流,导纳矩阵计算,EKF计算和UKF计算,都可以在Github中公开获得

英文摘要:

Accurate estimation of power system dynamics is very important for the enhancement of power system reliability, resilience, security, and stability of power system. With the increasing integration of inverter-based distributed energy resources, the knowledge of power system dynamics has become more necessary and critical than ever before for proper control and operation of the power system. Although recent advancement of measurement devices and the transmission technologies have reduced the measurement and transmission error significantly, these measurements are still not completely free from the measurement noises. Therefore, the noisy measurements need to be filtered to obtain the accurate power system operating dynamics. In this work, the power system dynamic states are estimated using extended Kalman filter (EKF) and unscented Kalman filter (UKF). We have performed case studies on Western Electricity Coordinating Council (WECC)'s $3$-machine $9$-bus system and New England $10$-machine $39$-bus. The results show that the UKF and EKF can accurately estimate the power system dynamics. The comparative performance of EKF and UKF for the tested case is also provided. Other Kalman filtering techniques alongwith the machine learning-based estimator will be updated inthis report soon.All the sources code including Newton Raphsonpower flow, admittance matrix calculation, EKF calculation, andUKF calculation are publicly available in Github

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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