Analysis and Design of DC System Protection Using Z-Source Circuit Breaker

Chang, Arthur H.; Sennett, Brian R.; Avestruz, Al-Thaddeus; Leeb, Steven B.; Kirtley, James L.

doi:10.1109/tpel.2015.2415775

Cited by 149 publications

(44 citation statements)

References 23 publications

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“…As of now, several topologies of ZCB have been introduced as the expansion and development of the first proposed ZCB from [25]. A modified Z-source breaker topology was introduced in [28] that uses a common return ground path to minimize the reflected fault current drawn from a source. The study of [29] represented a bidirectional ZCB (BZCB) with reduced peak source current and its low-pass filter frequency response characteristic.…”

Section: Zcb and Hif Detection/interruption Modesmentioning

confidence: 99%

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A New Method of Detecting and Interrupting High Impedance Faults by Specifying the Z-Source Breaker in DC Power Networks

Bhatta

Zhang

2020

Electronics

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High impedance faults (HIFs) that cause a relatively smaller current magnitude compared to the traditional low impedance faults are not easily detectable but can cause an extreme threat to electric apparatus and system operation. This paper introduces a new method of detecting and interrupting HIFs in DC power networks by specifying Z-source circuit breakers (ZCBs). The ZCB is a protective device for high power DC branches, with the capabilities of protecting bidirectional power flow and automatic/controllable turnoff function. In this new method, the operational mode of ZCB (i.e., either the detection mode or interruption mode) can be specified. Beyond previous research, the theoretical analysis has been performed on this method and the mathematical relationship between the maximum HIF resistance and required Z-source capacitance has been derived and verified. It has been found that the ZCB can respond to a HIF accordingly when its capacitances are properly adjusted in the ZCB circuit. With the adjustment of these Z-source capacitances, the ZCB can be specified to detect and report a HIF status to power system operators, or cut off the HIF branch and protect the rest of the DC system directly. The new method can detect/interrupt a HIF that is as small as 2 times of its nominal rated current and the effectiveness and general usage of the derived equation have been verified by both low power experiments in lab and high power simulation tests.

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Section: Zcb and Hif Detection/interruption Modesmentioning

confidence: 99%

“…A ZCB typically consists of several power electronic components, including SCRs, diodes, and other passive devices, e.g., inductors and capacitors. Up to date, there are several ZCB topologies and their parameter specifications developed based on the principle of resonant circuit [28].…”

Section: Brief Introduction Of "Intercross Connected Bidirectional Z-mentioning

confidence: 99%

A New Method of Detecting and Interrupting High Impedance Faults by Specifying the Z-Source Breaker in DC Power Networks

Bhatta

Zhang

2020

Electronics

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“…One of these issues is addressed in the study on the protection principle under DC fault conditions, particularly for the networks with VSCs [7,8]. Conventional converters with thyristors do not experience a high level of overcurrent during DC fault scenarios, whereas in VSCs, insulated-gate bipolar transistors (IGBTs) in converters are blocked as a result of instant self-protection.…”

Section: Introductionmentioning

confidence: 99%

Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines

et al. 2018

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Abstract:With the promotion of distributed energy and direct current (DC) loads, the DC microgrid is able to provide a higher power quality and improve the grid efficiency. Various technical issues in DC microgrids are still to be addressed, particularly a proper protection scheme for fault detection and isolation in DC microgrids utilizing voltage source converters (VSCs). In this paper, the pole-to-pole DC fault transient behavior of the VSC-based microgrids is firstly analyzed with four successive stages, and then the exact requirements for protections are presented. Furthermore, a novel single-ended protection scheme based on local transient signals is proposed, which needs no data transmission or synchronization between two ends, ensuring the speed. A four-terminal DC microgrid model was built in PSCAD/EMTDC. Numerous simulations have demonstrated the validity of the proposed scheme.

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“…In existing literature together with the SCR device, the use of impedance-source network circuit breaker is a kind of SCR solid-state circuit breaker. The impedance-source network circuit breakers in existing literature are cross Z-source [33], parallel Z-source [34], series Z-source [35], and coupled inductor [36].…”

Section: Motivationmentioning

confidence: 99%

“…The placement of the capacitor is in parallel to the inductor. [35] proposed an evolvement of the parallel Z-source circuit breaker to achieve the series Z-source circuit breaker. The series Z-source circuit breaker rearrange the source capacitor by connecting it across forward and return path.…”

Section: Smoothing Capacitor Modificationmentioning

confidence: 99%

Fault tolerance and protective schemes for DC power distribution

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Analysis and Design of DC System Protection Using Z-Source Circuit Breaker

Cited by 149 publications

References 23 publications

A New Method of Detecting and Interrupting High Impedance Faults by Specifying the Z-Source Breaker in DC Power Networks

A New Method of Detecting and Interrupting High Impedance Faults by Specifying the Z-Source Breaker in DC Power Networks

Single-Ended Protection Scheme for VSC-Based DC Microgrid Lines

Fault tolerance and protective schemes for DC power distribution

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