Protection of Smart DC Microgrid With Ring Configuration Using Parameter Estimation Approach

Mohanty, Ramanarayan; Pradhan, Ashok Kumar

doi:10.1109/tsg.2017.2708743

Cited by 130 publications

(65 citation statements)

References 35 publications

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“…Based on the directions of if or itd, it is obvious that the faults are forward faults for s2 and backward fault for s3 in Figure 15. The method in [16] is able to overcome very high transient resistance (10 Ω), however, 5 Ω is a high transient resistance for the DC microgrid, which is also employed in [14] and [15] and this simulation adopts much longer fault distance. Therefore, the protection has enough transient resistance tolerance ability.…”

Section: Simulation Results For Local Protectionmentioning

confidence: 99%

“…The protection zones of the bus are symbolled with different colors. It can be seen that compared with the systems in [15,16], the protection zones are much less. The f 1-5 mean fault locations.…”

Section: Case Studymentioning

confidence: 96%

“…The method focused on cable and bus fault detection and did not involve the converters protection. In [15,16] protection methods for ring-bus DC microgrids are presented and both employed the conventional ring-bus structure (Figure 2b). Two methods were mainly proposed for VSC (Voltage Source Converter), therefore, they did not completely consider other converters.…”

Section: Introductionmentioning

confidence: 99%

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A Protection System for Improved Ring-Bus DC Microgrids

et al. 2019

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An improved system structure and a corresponding protection system are proposed in this paper, which aims at providing future DC microgrids with suitable protection ideas. At first, the ring-bus system is adjusted to balance the system control and protection and make the system more conventional for the equipment expansion. In addition, based on this structure, a protection system is established. It consists of two parts, which are local protection and pilot centralized protection. The local protection is designed for protecting the vulnerable power electronic components in converters and the pilot protection is mainly proposed for the fault isolation. The combination between two parts makes the whole system overcome the contradiction between protection speed and reliability and the method also takes the protection suitability into consideration. Finally, all the methods are verified by the simulation system based on the PSCAD /EMTDC.

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Section: Simulation Results For Local Protectionmentioning

confidence: 99%

Section: Case Studymentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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A Protection System for Improved Ring-Bus DC Microgrids

et al. 2019

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“…The conventional DC protection schemes and the brief comparison of different schemes are shown in TABLE I [8]- [29], [33]- [36]. The differential protection and directional comparison protection are communication-based protection [17], [23], [26], [27], [36]. They are high accurate schemes with optimized selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, for the protection methods based on the current detection, the measurement of rapidly rising high fault current is a big challenge in the compact system. Current measurement methods consist of current transformers (CTs), rogowski coils, Hall-Effect sensors, shunt resistors and the methods based on the voltage-drop of power devices [3]- [7], [23], [30]. The main challenge for CTs and rogowski coils is that DC component of current cannot be measured.…”

Section: Introductionmentioning

confidence: 99%

Fast Fault Protection Based on Direction of Fault Current for the High-Surety Power-Supply System

Chen

Yang

et al. 2019

IEEE Trans. Power Electron.

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The high-surety power supply system, Super Uninterruptable Power Supply (Super-UPS), is an evolution of the traditional UPS. It consists of multiple sources, multiple energy storages and redundant power converters to improve the reliability of the power supply system significantly. In this paper, a fast fault protection scheme based on direction of fault current without the assistance of communication for Super-UPS is presented. It achieves fast and selective fault detection and ensures the uninterruptible load power when short-circuit faults occur. The directional fault current detection and the coordination between the circuit breakers and converters are investigated. The protection threshold setting are also discussed. In addition, an improved fault current measurement method, which can suppress the influence of stray inductance of the solid state circuit breaker, is presented to guarantee an accurate operation of the protection scheme for rapidly rising fault current. Finally, the proposed protection scheme and the improved fault current measurement method for Super-UPS are verified by experiments.

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Fault detection and location estimation forLVDCmicrogrid using self‐parametric measurements

Reddy

Chatterjee

Chakraborty

et al. 2020

Int Trans Electr Energ Syst

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Faster fault detection and location has become one of the prime assignments in microgrids for better control strategies. Quick identification of fault may result in location estimation tougher due to insufficient measurement data. In this article, a better scheme for fault detection and a novel method for the location of fault with good accuracy are portrayed. The speed and cost‐effectiveness of the proposed scheme has been assured due to less sampling frequency. The proposed method is developed for a standalone low voltage DC (LVDC) system with photovoltaics and battery energy storage system. A large number of fault scenarios have been simulated and analyzed by varying faults (pole‐pole, pole‐ground), fault resistance, and locations. The proposed scheme deals with local measurements that heartens the easy implementation of the proposed method. The case studies have been simulated in MATLAB/ SIMULINK environment. The efficacy of the proposed protection scheme is further validated in a real‐time environment.

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Protection of Smart DC Microgrid With Ring Configuration Using Parameter Estimation Approach

Cited by 130 publications

References 35 publications

A Protection System for Improved Ring-Bus DC Microgrids

A Protection System for Improved Ring-Bus DC Microgrids

Fast Fault Protection Based on Direction of Fault Current for the High-Surety Power-Supply System

Fault detection and location estimation forLVDCmicrogrid using self‐parametric measurements

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