Control and protection of MMC-based HVDC systems: A review

Chandio, Rashid Hussain; Chachar, Faheem Akhtar; Soomro, Jahangeer Badar; Ansari, Jamshed Ahmed; Munir, Hafiz Mudassir; Zawbaa, Hossam M.; Kamel, Salah

doi:10.1016/j.egyr.2022.12.056

Cited by 32 publications

(14 citation statements)

References 99 publications

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“…The subscript peak denotes the peak value. Therefore, the calculated current I dcset can be used to verify whether it exceeds the current limit of the bridge arm according to (5). On the one hand, a certain margin is reserved to ensure that the bridge arm current amplitude does not exceed the allowable range [25] (i.e.…”

Section: Amplitude Of Injection Signalmentioning

confidence: 99%

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Fault properties identification scheme for hybrid MTDC system based on LCC signal injection and distributed parameter line model

Hou

Song

Fan

2023

IET Generation Trans & Dist

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A fault properties identification scheme for a hybrid multi‐terminal DC (MTDC) system is proposed to improve the power supply reliability in the system recovery stage. Firstly, a current signal injection strategy based on line commutated converter (LCC) is proposed using the fault control capability. Secondly, the difference between the calculated value (CV) and the measured value (MV) of the current signal under permanent and temporary faults is analyzed for the distributed parameter line model. By introducing the dynamic time warping (DWT) algorithm to represent the difference between CV and MV, a fault properties identification scheme for permanent fault identification is constructed. Finally, the proposed scheme for permanent fault location with the distributed parameter model is obtained by introducing the trust region reflection (TRR) algorithm. The simulation results show that the proposed fault properties identification scheme has the function of permanent fault identification and location. The proposed scheme fully considers the effects of fault impedance, sampling rate, noise, and data loss. It can be applied to high voltage DC long‐distance transmission lines with LCC.

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Section: Amplitude Of Injection Signalmentioning

confidence: 99%

“…The above schemes risk blindly overlapping with permanent faults, which may cause damage to the system. Therefore, an effective fault properties identification scheme is necessary [5,6].…”

Section: Introductionmentioning

confidence: 99%

Fault properties identification scheme for hybrid MTDC system based on LCC signal injection and distributed parameter line model

Hou

Song

Fan

2023

IET Generation Trans & Dist

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“…When it comes to sending electrical power generated far away from the mainland to load centers over tremendous distances or offshore, HVDC technology is crucial [4][5][6][7][8]. HVDC technology is essential to today's power systems because of characteristics including adaptability, efficiency in power transmission, affordable and technical advantages, eco-friendly, narrow transmission line losses, appropriate for high power large-scale, high-power transmission throughout extensive distances, combining asynchronous power systems, submarine cable connection, defense to deviations in phase angle, frequency, impedance, or voltage, sustaining standalone frequency and generator management especially when compared to conventional HVAC power systems [5][6][7][9][10][11][12][13]. It is clear from the aforementioned characteristics that HVDC technology will serve a crucial role in the present-day power networks of the coming decades.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Non-isolated DC-DC Modular Multilevel Converter Architecture for High Voltage Direct Current Power Networks Interconnections

Erat,

Vural

2024

Preprint

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Day by day, the share of renewable energy-based power plants such as offshore wind farms and photovoltaic power plants, in the present-day power systems is escalating. Nevertheless, most of these power-producing facilities have been located quite far away from the load centers. At this stage, HVDC power systems provide satisfactory options due to qualities such as reduced line losses, substantial controllability, and environmental advantages. Nevertheless, unique converter designs are required to combine asynchronous HVDC networks with each other and with already existing high voltage alternating current (HVAC) networks. In this study, based on the above special cases, a unique DC-DC modular multilevel converter (MMC) architecture is presented that provides an excellent solution for both integrating modern asynchronous HVDC networks and integrating these modern HVDC power systems with existing asynchronous HVAC power systems. The mathematical analysis of the recommended DC-DC MMC design has been examined in detail and the power transfer between two asynchronous power grids has been realized in a simulation environment. Efficient bilateral power transmission has been made achievable by the control system. The recommended DC-DC MMC topology has shown to be a highly successful approach, in the interconnection of HVDC power systems, according to the simulation results.

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“…Over the past few years, significant breakthroughs in the Voltage-Source Converters (VSCs) along with their attractive features have made the HVDC technology even more promising in providing enhanced reliability and functionality and reducing power losses [1]- [5]. Currently, the Modular Multilevel Converter (MMC), which is built based upon stack of identical half-or full-bridge submodules (SMs), is the dominant VSC topology for HVDC transmission because of its salient features including (i) scalability/modularity to meet any voltage/power-level requirements, (ii) excellent harmonic performance, (iii) very high efficiency, and (iv) redundancy in the converter configuration [6]- [11].…”

Section: Introductionmentioning

confidence: 99%

Series Hybrid Modular Multilevel Converter for HVDC Transmission Systems

Alaei,

Khajehoddin

2024

IEEE Access

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In this paper, a multilevel Voltage Source Converter for HVDC transmission systems is proposed. The topology is based on a string of full-bridge submodules in addition to an unfolder on the converter's AC-side. Compared to the modular multilevel converter, it has fewer components and has the advantage that almost two third of the switches operate in soft switching mode. Furthermore, for the same level of stress on converter and transformer, it provides a DC-link voltage 3.33 times higher than AC-side rms-voltage. A control strategy is proposed to regulate the active and reactive power exchanged with the grid while the capacitor voltage balancing is ensured. The viability of the proposed converter, as well as the effectiveness of the voltage balancing control strategy are confirmed by simulation and experiment.INDEX TERMS High power converter, HVDC system, transmission lines, modular multilevel converter, soft switching.

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Control and protection of MMC-based HVDC systems: A review

Cited by 32 publications

References 99 publications

Fault properties identification scheme for hybrid MTDC system based on LCC signal injection and distributed parameter line model

Fault properties identification scheme for hybrid MTDC system based on LCC signal injection and distributed parameter line model

Design and Analysis of a Novel Non-isolated DC-DC Modular Multilevel Converter Architecture for High Voltage Direct Current Power Networks Interconnections

Series Hybrid Modular Multilevel Converter for HVDC Transmission Systems

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