Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai

Qu, Lu; Yu, Zhanqing; Song, Qiang; Yuan, Zhaohui; Zhao, Biao; Yao, Danya; Chen, Jianfu; Liu, Yao; Zeng, Rong

doi:10.1007/s11708-018-0599-2

Cited by 39 publications

(35 citation statements)

References 9 publications

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“…Fig. 2 shows the configuration scheme of the arresters concerning internal overvoltage [7]. The parameters of the arresters are shown in Table 3.…”

Section: System Topology Parameters and Simulation Modellingmentioning

confidence: 99%

“…The multi‐terminal MMC‐MVDC (medium voltage DC distribution system based on modular multilevel converter) distribution system has become a research hotspot due to its advantages in the renewable energy grid connection and consumption, AC/DC sensitive load connection [1–3], diverse operation modes and high power supply reliability [4–6]. At present, VSC‐DC power distribution projects have been put into operation in Guizhou, Hangzhou, Zhangbei, Zhuhai [7–9], and Aachen [10]. The voltage of the Aachen's project is ±5 kV, while the others are ±10 kV.…”

Section: Introductionmentioning

confidence: 99%

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Study on lightning protection scheme of multi‐terminal MMC‐MVDC distribution system

et al. 2020

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Based on a ±10 kV three‐terminal MMC‐MVDC (medium voltage DC distribution system based on modular multilevel converter) system, in this study, the authors mainly study on the influencing factors and protection schemes of the lightning intruding overvoltage (including direct lightning and back‐flashover lightning). Firstly, a lightning intruding overvoltage simulation model of the MMC‐MVDC distribution system using overhead lines is established based on the PSCAD/EMTDC program. The influence of steady‐state operating voltage and the number of converter stations on the simulation results are simulated and analysed. Meanwhile, the proper simulation modelling method of the lightning intruding overvoltage for multi‐terminal MMC‐MVDC system is proposed. Secondly, the lightning intruding overvoltage is simulated when the line is struck by the lightning stroke current that occurs once in 20 years and the different lightning protection schemes are proposed. Finally, based on the lightning impulse withstand voltage, lightning trip‐out rate and the cost of the protection schemes, the lightning protection schemes in different scenarios are proposed. The simulation results show that if the cost of the system is prioritised, the protection scheme of increasing the number of parallel stacks of the DL arresters can be selected, and if the power supply reliability of the system is prioritised, the protection scheme of installing the overhead ground wire as well as reducing grounding resistance can be selected.

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“…Fig. 2 shows the configuration scheme of the arresters concerning internal overvoltage [7]. The parameters of the arresters are shown in Table 3.…”

Section: System Topology Parameters and Simulation Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on lightning protection scheme of multi‐terminal MMC‐MVDC distribution system

et al. 2020

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“…Symmetrical monopole FB-MMCs have been most employed, in which the pole-to-pole fault may seriously damage the power converters and need to be isolated rapidly. The DC fault protection of a three-terminal MVDC demonstration project is introduced in [7], where two terminals based on HBSM-MMCs are protected by DCCBs while the other terminal based on the hybrid MMC with DC fault blocking capability is protected by the AC circuit breaker (ACCB). However, fault detection is not discussed.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Control and Protection Scheme Based on FBSM-MMC Active Current Limiting Strategy for DC Distribution Network

Zheng

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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DC faults can easily lead to overcurrent in DC distribution networks; these faults pose serious threats to the safe operation of the system. The blocking of modular multilevel converters based on the full-bridge sub-modules (FBSM-MMC) is mostly utilized to cut off the fault current. However, the blocking causes short-term blackouts in the entire DC distribution network and there are presently no effective solutions to address this problem. In this study, an integrated control and protection scheme based on the FBSM-MMC active current limiting strategy is proposed. The project includes three stages: first, MMC active current limiting strategy is used to limit the output current of the converter to about 1.2 p.u. after the occurrence of the fault (Stage 1); next, faulty lines are identified based on the asynchronous zero-crossing features of the DC currents of the two ends of the line (Stage 2); then, a fault isolation scheme based on the cooperation of converters, DC circuit breakers, and high-speed switches is proposed to isolate the faulty line (Stage 3). The distribution network can restart quickly via control of the converters. Finally, the simulation of a four-terminal flexible DC distribution network in PSCAD/EMTDC demonstrates the effectiveness of the proposed integrated scheme. Index Terms-Flexible DC distribution network, full-bridge sub-modules, converter active current limiting control, current zero-crossing detection, integrated control and protection scheme.

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“…Owing to the existence of LCS, the traditional hybrid DCCBs mentioned above will generate some conduction losses in the main branch. In order to avoid the usage of complex and expensive water cooling system, a current commutation module (CCM)‐based hybrid DCCB is proposed [11–13], as shown in Fig. 1 b .…”

Section: Introductionmentioning

confidence: 99%

Research on the breaking branch for a hybrid DC circuit breaker in±500 kV voltage‐sourced converter high‐voltage direct current grid

Liu

Gou

Zhuo

et al. 2020

IET power electron.

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Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai

Cited by 39 publications

References 9 publications

Study on lightning protection scheme of multi‐terminal MMC‐MVDC distribution system

Study on lightning protection scheme of multi‐terminal MMC‐MVDC distribution system

An Integrated Control and Protection Scheme Based on FBSM-MMC Active Current Limiting Strategy for DC Distribution Network

Research on the breaking branch for a hybrid DC circuit breaker in±500 kV voltage‐sourced converter high‐voltage direct current grid

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