A Full-bridge Director Switches based Multilevel Converter with DC Fault Blocking Capability and Its Predictive Control Strategy

Jin, Zhiwei; Wei, Tongzhen; Huo, Qunhai; Yin, Jingyuan

doi:10.3390/en12010091

Cited by 6 publications

(5 citation statements)

References 25 publications

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“…This configuration produces more voltage levels, which contributes to a more pronounced reduction in harmonic content within the output voltage. Full-bridge MMCs are commonly used in high and ultrahigh voltage HVDC applications [22]. The modular multi-level converter layout is shown in Figure 6 where SM represents a sub-module of the half-bridge topology [23] .…”

Section: ) Full-bridge MMCmentioning

confidence: 99%

Power Sharing Control Trends, Challenges, and Solutions in Multi-Terminal HVDC Systems: A Comprehensive Survey

Alrajhi,

Daraz,

Alzahrani

et al. 2024

IEEE Access

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This extensive review article provides a comprehensive analysis of control strategies for power sharing in Multi-Terminal High Voltage Direct Current (MT-HVDC) systems utilizing voltage source converters (VSC) and multi-level modular converters (MMC). MT-HVDC systems have become essential components of modern power infrastructures due to their ability to efficiently transmit energy over long distances, connect renewable energy sources, and enhance grid stability. Effective power sharing control is of uttermost importance in these systems for ensuring equitable energy distribution between terminals and grid reliability. The paper begins with a thorough explanation of the fundamental concepts underlying MT-HVDC systems, emphasizing their significance, and examining the various configurations of such systems. The discussion then examines the functions of VSCs and MMCs in these systems, highlighting their distinct advantages and applications. The review analyses in depth the complex power sharing control strategies within VSC-based and MMC-based multi-terminal HVDC systems, as well as a number of control methods, algorithms, and optimization techniques. In addition, the article discusses difficulties and solutions associated with power sharing control in MT-HVDC systems, such as communication and synchronization issues.INDEX TERMS Cascaded controller, DC systems, High voltage direct current (HVDC), modular multilevel converter (MMC) multi-terminal HVDC, Power Control Sharing, Voltage source converter (VSC).

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Section: ) Full-bridge MMCmentioning

confidence: 99%

Power Sharing Control Trends, Challenges, and Solutions in Multi-Terminal HVDC Systems: A Comprehensive Survey

Alrajhi,

Daraz,

Alzahrani

et al. 2024

IEEE Access

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“…An addition of a directional switch and two diodes to existing HB sub module has been provided to quickly block DC fault current without changing original control strategy. Reference [80] has proposed a full bridge director switch based MMC that effectively blocks DC side faults in a more compact way. A suitable control strategy is also proposed in order to minimize the error of sub module voltages and AC current.…”

Section: ) Mmcs With Fault Blocking Featuresmentioning

confidence: 99%

MMC Based MTDC Grids: A Detailed Review on Issues and Challenges for Operation, Control and Protection Schemes

2020

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For decades high voltage alternating current (HVAC) was considered as most economical solution to transmit and deliver electric power. With the recent developments in power electronic devices, high voltage direct current (HVDC) system becomes most prominent technology. Multi-terminal direct current (MTDC) based system as a promising technology for future power system is the major focus area for researchers and industries these days. A number of MTDC systems have been implemented physically. The major motivation to construct such MTDC systems is the integration of large-scale offshore power sources such as wind turbines and solar systems. This paper discusses the most critical challenges and issues related to operation, control and protection schemes for integration of modular multi-level converter (MMC) based MTDC systems. At first detailed literature survey has been presented to show the challenges for MMC based MTDC systems, then an analysis related to those challenges for operation, control and protection schemes for existing MMC based MTDC systems has been provided. Finally, a road map to tackle such challenges has been suggested.

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“…The cascaded module structure contains two different type: The cascaded chopper/half-bridge (CC) structure that can be used in a H-MMC topology and the H-bridge/full-bridge (CHB) structure that can be used in a CHB rectifier (CHBR), CHB-STATCOM, or alternate-arm converter (AAC) topology [22][23][24]. A new method based on PD-PWM for achieving the effect of dynamic regulation ability used in CC structures has been proposed in [20,21], but this modulation strategy cannot be used directly in a CHB structure control strategies because there are fundamental differences between the configurations of two structures.…”

Section: Configuration Of Cascaded Module Structurementioning

confidence: 99%

Simple DC-Link Voltage Balancing Approach for Cascaded H-Bridge Rectifier with Asymmetric Parameters of Independent DC Loads

Jin

Wei

et al. 2019

Energies

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CHB is a suitable type of topology for synchronous rectifier application which has two or more independent DC loads. Focusing on the individual DC-link capacitor voltage balancing problems caused by asymmetric parameters of independent DC loads, this paper developed a new dual modulation signals based phase disposition pulse width modulation (PD-PWM) strategy using dynamic carrier bias allocation method. Its main idea is to allocate the bias of the carrier wave dynamically according to the balance situation of the system. Compared with the traditional modulation strategies, this method is more easily to be realized and has much stronger dynamic regulation ability. This modulation strategy is widely applicable to various types of CHB structures. A detailed analysis of the DC-link capacitor charge-discharge profile is performed, and an operation condition based dynamic bias allocation method is described using the cascaded H-bridge rectifier (CHBR) structure of five sub-modules as an example. A simulation model and an experiment platform are developed, and the feasibility and effectiveness of the modulation strategy are verified by simulation and experiment results.

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A Full-bridge Director Switches based Multilevel Converter with DC Fault Blocking Capability and Its Predictive Control Strategy

Cited by 6 publications

References 25 publications

Power Sharing Control Trends, Challenges, and Solutions in Multi-Terminal HVDC Systems: A Comprehensive Survey

Power Sharing Control Trends, Challenges, and Solutions in Multi-Terminal HVDC Systems: A Comprehensive Survey

MMC Based MTDC Grids: A Detailed Review on Issues and Challenges for Operation, Control and Protection Schemes

Simple DC-Link Voltage Balancing Approach for Cascaded H-Bridge Rectifier with Asymmetric Parameters of Independent DC Loads

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