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This paper proposes a method for detecting the location of arc fault by monitoring power flows of DC system. By measuring electronic circuit parameters from power meters in system branch, the arc fault detector can recognize the occurrence, type, and location of arc. Based on the type and location of arc fault, management unit can find an effective way to protect the system. Experiment set of a down...
This paper proposes a power management strategy of multiple energy storages system for DC microgrid. A static power flow regulation between batteries is accomplished by adopting adaptive droop offset voltage. By addition of offset voltage proportional to state-of-charge (SOC) error, the battery with higher SOC provides more load power while the one with lower SOC provides less. In addition, the dynamic...
In this paper, system component and arc modeling are presented, along with low frequency range analysis for dc arc fault detection. With an arc fault model consisting of a voltage source and variable resistor, the system during arcing can be described as an equivalent circuit model, which gives motivation for the proposed arc detection method. The presented model represents the low frequency characteristics...
This paper proposes a fault ride-through (FRT) techniques based on low-pass notch filter PLL (LPN-PLL). The proposed LPN-PLL is an upgraded version of fast fourier transform PLL (FFT-PLL) which is robust to the harmonics and imbalance of the grid voltage and is based on the fast fourier transform (FFT) concept instead of using a conventional synchronous reference frame PLL (SRF-PLL), which requires...
The thumbnail images can be extracted from the H.264/AVC bitstreams directly without inverse transform into spatial domain. However, it has some difference caused by rounding of the floating point operation and it will be propagated to next blocks. In this paper, we propose an error compensation method for thumbnail generation process considering error propagation. It determines the compensation value...
An efficient distributed video coding algorithm using symmetric motion estimation and channel division is proposed in this work. We employ the symmetric motion estimation to generate high quality side information for Wyner-Ziv frames. Also, in the channel division, we classify blocks in the side information into reliable ones and unreliable ones. Then, we transmit parity bits for unreliable blocks...
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