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Loss-of-Main Monitoring and Detection for Distributed Generations Using Dynamic Principal Component Analysis

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DOI: 10.4236/jpee.2014.24057    3,341 Downloads   4,253 Views   Citations

ABSTRACT

In this paper, our previous work on Principal Component Analysis (PCA) based fault detection method is extended to the dynamic monitoring and detection of loss-of-main in power systems using wide-area synchrophasor measurements. In the previous work, a static PCA model was built and verified to be capable of detecting and extracting system faulty events; however the false alarm rate is high. To address this problem, this paper uses a well-known ‘time lag shift’ method to include dynamic behavior of the PCA model based on the synchronized measurements from Phasor Measurement Units (PMU), which is named as the Dynamic Principal Component Analysis (DPCA). Compared with the static PCA approach as well as the traditional passive mechanisms of loss-of-main detection, the proposed DPCA procedure describes how the synchrophasors are linearly
auto- and cross-correlated, based on conducting the singular value decomposition on the augmented time lagged synchrophasor matrix. Similar to the static PCA method, two statistics, namely T2 and Q with confidence limits are calculated to form intuitive charts for engineers or operators to monitor the loss-of-main situation in real time. The effectiveness of the proposed methodology is evaluated on the loss-of-main monitoring of a real system, where the historic data are recorded from PMUs installed in several locations in the UK/Ireland power system.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Guo, Y. , Li, K. and Laverty, D. (2014) Loss-of-Main Monitoring and Detection for Distributed Generations Using Dynamic Principal Component Analysis. Journal of Power and Energy Engineering, 2, 423-431. doi: 10.4236/jpee.2014.24057.

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