A new protection scheme for DC microgrid using line current derivative

Meghwani, Anju; Srivastava, Suresh C.; Chakrabarti, Saikat

doi:10.1109/pesgm.2015.7286041

Cited by 87 publications

(30 citation statements)

References 13 publications

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“…The current derivative-based protection schemes proposed in [11,12] are susceptible to noise. The overcurrent protection strategies proposed in [13,14] cannot provide proper selectivity or require extra devices.…”

Section: Literature Reviewmentioning

confidence: 99%

Directional element for faulty feeder identification of high‐resistance fault in high‐surety power supply systems

Rouhani

Sadeghkhani

Guerrero

2020

IET Generation Trans & Dist

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The high‐surety power supply systems are gaining great attention to enhance the reliability of uninterruptable power supplies. A high‐resistance fault along a high‐surety power supply feeder results in a low fault current, making the conventional high‐surety power supply protection strategy ineffective. To address this problem, this paper develops a directional fault protection strategy for high‐resistance fault detection and faulty feeder identification. Using the intelligent electronic device, the feeder current is sampled and normalised. Then, the fault‐imposed component of the current signal is calculated. This component is added to the input of the forced Helmholtz oscillator to increase the sensitivity of the proposed protection scheme for the detection of high‐resistance faults. The output of the forced Helmholtz oscillator equation is adopted as the fault detection criterion because it is infinity for reverse faults while it is lower than 1 for forward faults, facilitating the fault detection. The developed strategy is local and can detect and classify both pole‐to‐ground and pole‐to‐pole high‐resistance faults. Also, it is effective for both unidirectional and bidirectional converters. The merits of the proposed protection strategy are demonstrated through several fault scenarios using a ±375 V high‐surety power supply system.

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Section: Literature Reviewmentioning

confidence: 99%

Directional element for faulty feeder identification of high‐resistance fault in high‐surety power supply systems

Rouhani

Sadeghkhani

Guerrero

2020

IET Generation Trans & Dist

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“…3 b . This configuration is effective for the microgrids with short lines [36]. The VSC parameters of microgrid 2 are considered same as that of microgrid 1.…”

Section: Study Microgridsmentioning

confidence: 99%

Adaptive complex virtual impedance control scheme for accurate reactive power sharing of inverter interfaced autonomous microgrids

Zandi

Fani

Sadeghkhani

et al. 2018

IET Generation, Transmission & Distribution

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“…Hence, a faster response of the voltage loop ensures a smaller voltage deviation. These two factors clearly suggest that, for a given voltage tolerance band, pushing the voltage control bandwidth facilitates the reduction of the output capacitance, which not only decreases the system cost, weight, and size, but also results in a lower short-circuit current during bus shortcircuit faults, making faults isolation easier [4]. However, with typical single-sampled Proportional-Integral-Derivative (PID) controllers, the control bandwidth is limited by the control delay introduced by the computation time and the Digital Pulse Width Modulation (DPWM) modulator [5].…”

Section: Introductionmentioning

confidence: 99%

Hysteresis Droop Controller with One Sample Delay for DC-DC Converters in DC Microgrids

Liu

Mattavelli

2019

2019 IEEE Energy Conversion Congress and Exposition (ECCE)

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Droop control is a common control strategy used in DC microgrids to manage power distribution among parallel Distributed Energy Resource (DER) converters. With droop control, the static dc bus voltage varies in a specified range according to load conditions. In order to maintain the dynamic dc bus voltage in the same range during load changes, droop-controlled DER converters usually have either large output capacitance or high voltage loop bandwidth. The latter enables the adoption of small output capacitance that improves the dc bus behaviour also during bus faults. However, with traditional control techniques, for example, the single-sampled PID controllers, the voltage loop bandwidth is limited by the control delay, including the computation time and the modulation delay. From this point of view, oversampled hysteresis control is appealing, because it reduces the modulation delay by removing the modulator. Also, the hysteretic nature allows nonlinear switching actions during transient, which further speeds up the dynamic response. Consequently, small output capacitance can be used without concerns of overvoltage and undervoltage. Moreover, hysteresis control is typically implemented on Field Programmable Gate Arrays (FPGAs). Differently, this paper focuses on the lessexpensive Digital Signal Processors (DSPs) implementation. The influence of additional computation time introduced by DSP on the converter's stability is also analyzed. Simulations and experiments are carried out to verify the performance of the DSP-implemented hysteresis droop controller.

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A new protection scheme for DC microgrid using line current derivative

Cited by 87 publications

References 13 publications

Directional element for faulty feeder identification of high‐resistance fault in high‐surety power supply systems

Directional element for faulty feeder identification of high‐resistance fault in high‐surety power supply systems

Adaptive complex virtual impedance control scheme for accurate reactive power sharing of inverter interfaced autonomous microgrids

Hysteresis Droop Controller with One Sample Delay for DC-DC Converters in DC Microgrids

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