Locating and Isolating DC Faults in Multi-Terminal DC Systems

Tang, Lianxiang; Ooi, Boon-Teck

doi:10.1109/tpwrd.2007.899276

Cited by 581 publications

(337 citation statements)

References 8 publications

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“…Most renewable energy resources, energy storage systems and loads used in consumer side have DC power terminals. Therefore, DC power networks have been drawing much attention, since it reduces the number of conversion stages (1)- (3) . As for control methods of such DC power networks or grids, various interesting studies have been actively done (4)- (7) .…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Floating Bidirectional Power Flow Controller for Next-Generation DC Power Network

et al. 2018

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To realize flexible power flow control for DC power networks, we have proposed a bidirectional power flow controller (BPFC) based on a bidirectional buck-boost converter. It is possible to control the power flow by intentionally introducing additional voltage difference between two terminals. However, we have not investigated the efficiency of BPFC for power flow control in detail so far (in previous papers). Because many power converters are expected to be installed in future DC power networks, efficiency investigation is vital. In this paper, we first reveal the energy efficiency of BPFC and study ways to improve the efficiency. Then, we propose a novel structure of the BPFC, which drastically improves its efficiency. We call the proposed structure floating bidirectional power flow controller (F-BPFC). The efficiency and characteristics of the F-BPFC are experimentally compared with those of the BPFC and its superiority is clarified in this paper.

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Section: Introductionmentioning

confidence: 99%

High-Efficiency Floating Bidirectional Power Flow Controller for Next-Generation DC Power Network

et al. 2018

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“…interconnected HVDC network requires dc CBs to selectively isolate a faulty cable, which cannot be realized by ac side CBs due to the forced de-energization of the entire system [5]. DC CB concepts can be found in [6]- [8], which still have significant drawbacks in terms of on-state losses or speed.…”

Section: Introductionmentioning

confidence: 99%

Analytic Approximation of Fault Current Contributions From Capacitive Components in HVDC Cable Networks

Bucher

Franck

2015

IEEE Trans. Power Delivery

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“…Multi-terminal DC (MTDC) grids are foreseen as an alternative solution to point-to-point connections owing to their increased redundancy and higher flexibility [4]. Intensive researches have recently been conducted to resolve various technical issues in the VSC-MTDC system, such as locating and isolating of DC faults [5], operation and control of MTDC grid integrating wind farms and so on [6,7]. In order to improve the capacity and stable operation of MTDC, X. Chen et al [8] have studied the control methods of hybrid MTDC grid integrating wind farms, and proposed corresponding control strategies.…”

Section: Introductionmentioning

confidence: 99%

Improved Adaptive Droop Control Design for Optimal Power Sharing in VSC-MTDC Integrating Wind Farms

Ran

Miao

2015

Energies

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Abstract:With the advance of insulated gate bipolar transistor (IGBT) converters, Multi-Terminal DC (MTDC) based on the voltage-source converter (VSC) has developed rapidly in renewable and electric power systems. To reduce the copper loss of large capacity and long distance DC transmission line, an improved droop control design based on optimal power sharing in VSC-MTDC integrating offshore wind farm is proposed. The proposed approach provided a calculation method for power-voltage droop coefficients under two different scenarios either considering local load or not. The available headroom of each converter station was considered as a converter outage, to participate in the power adjustment according to their ability. A four-terminal MTDC model system including two large scale wind farms was set up in PSCAD/EMTDC. Then, the proposed control strategy was verified through simulation under the various conditions, including wind speed variation, rectifier outage and inverter outage, and a three-phase short-circuit of the converter.

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Locating and Isolating DC Faults in Multi-Terminal DC Systems

Cited by 581 publications

References 8 publications

High-Efficiency Floating Bidirectional Power Flow Controller for Next-Generation DC Power Network

High-Efficiency Floating Bidirectional Power Flow Controller for Next-Generation DC Power Network

Analytic Approximation of Fault Current Contributions From Capacitive Components in HVDC Cable Networks

Improved Adaptive Droop Control Design for Optimal Power Sharing in VSC-MTDC Integrating Wind Farms

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