Active Voltage Feedback Control for Hybrid Multiterminal HVDC System Adopting Improved Synchronverters

Dong, Shuan; Chi, Yongning; Li, Yan

doi:10.1109/tpwrd.2015.2420657

Cited by 82 publications

(27 citation statements)

References 27 publications

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“…The LCC-HVDC has more economic efficiency and system stability for point-to-point long distance transmission, while the VSC-HVDC has more controllability and flexibility by independently decoupling active and reactive power [65][66][67]. The LCC-HVDC and VSC-HVDC can constitute a hybrid multi-terminal HVDC system that is able to utilize the advantages of the HVDC in both categories [68]. When VSC-HVDC stations are controlled by the VSG strategy, they provide virtual inertia and regulate the frequency, which enhances the system's controllability.…”

Section: Converter Stationmentioning

confidence: 99%

Review of VSG Control-Enabled Universal Compatibility Architecture for Future Power Systems with High-Penetration Renewable Generation

Yan

Zhang

2019

Applied Sciences

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Due to the irreversible energy substitution from fossil fuels to clean energy, the development trend of future power systems is based on renewable energy generation. However, due to the incompatibility of converter-based non-dispatchable renewable energy generation, the stability and reliability of traditional power systems deteriorate as more renewables are introduced. Since conventional power systems are dominated by synchronous machines (SM), it is natural to utilize a virtual synchronous generator (VSG) control strategy that intimates SM characteristics on integrated converters. The VSG algorithm developed in this paper originates from mimicking mathematic models of synchronous machines. Among the different models of implementation, the second-order model is simple, stable, and compatible with the control schemes of current converters in traditional power systems. The VSG control strategy is thoroughly researched and case studied for various converter-interfaced systems that include renewable generation, energy storage, electric vehicles (EV), and other energy demands. VSG-based integration converters can provide grid services such as spinning reserves and inertia emulation to the upper grids of centralized plants, distributed generation networks, and microgrids. Thus, the VSG control strategy has paved a feasible way for an evolutionary transition to a power electronics-based future power grid. By referring to the knowledge of traditional grids, a hierarchical system of operations can be established. Finally, generation and loads can be united in universal compatibility architecture under consolidated synchronous mechanisms.

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Section: Converter Stationmentioning

confidence: 99%

Review of VSG Control-Enabled Universal Compatibility Architecture for Future Power Systems with High-Penetration Renewable Generation

Yan

Zhang

2019

Applied Sciences

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“…In the flexible DC transmission inverter side (receiver end), literature [47] proposed an active voltage feedback control strategy based on VSM, which can be independent of the communication system to ensure frequency control. Besides, the traditional synchronizer is improved and the VSC-VSM can realize the secondary frequency adjustment independent of PLL current under fault conditions.…”

Section: A Application Of Virtual Synchronous Generatormentioning

confidence: 99%

Review and Applications of Virtual Synchronous Machines Technologies

Liu

Hao

et al. 2019

2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

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Renewable energy such as solar or wind energy provides new possibilities to meet the world's energy needs. However, connecting renewable energy sources to the power grid at a large scale will cause huge stability challenges at the connection interface. Virtual synchronous machine (VSM) technologies, which emulate the transient electromechanical characteristics of traditional synchronous machines, offer a unified interface for smart grid integration. With these technologies, all the renewable energy generators as well as the flexible loads could take part in regulating the grid frequency and voltage, thus improving the power grid's stability. This paper presents the origin and development of VSM technology, and evaluates the mathematical model, control strategies and stability issues of the technology. It then summarizes VSM applications related to the grid interconnection of renewable energy, voltage sourced converter based HVDC (VSC-HVDC), motor speed regulation, and fast-charging interfaces. Finally, future research directions are assessed.

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“…Virtual synchronous control is developed to emulate SGs to embed inertial response in grid-connected voltage source converters (VSCs) [30]- [45] as virtual synchronous generators/machines recently, which has been discussed and studied in energy storage [31], Statcom [32], VSC-HVDC [33]- [36], distributed generation [37]- [39], micro grid [40] used to produce the required voltage, which can feature inertial response in VSCs [43]. In addition, a linear power-damping and synchronizing controller is used to emulate SG's dynamic performance in VSCs by Mohamed et al [44]- [45].…”

Section: Virtual Synchronous Controlmentioning

confidence: 99%

Enabling Inertial Response of Variable-Speed Wind Turbines: A Survey and New Perspectives

Shang

2016

Preprint

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Abstract:With the rapid development of wind power generations, the inertial response of wind turbines (WTs) are widely concerned recently, which is important for grid frequency dynamic and stability. This paper recognizes and understands the inertial response of type-3 and type-4 WTs from the view of equivalent internal voltage, in analogy with typical synchronous generators (SGs). Due to the dynamic of the equivalent inertial voltage different from SGs, the electromechanical inertia of WTs is completely hidden. The rapid power control loop and synchronization control loop is the main reasons that the WT's inertial response is disenabled. On the basis of the equivalent internal voltage's dynamic, the existing inertia control method for WTs are reviewed and summarized as three approaches from the view of WT's control, i.e. optimizing the power control or synchronization control or both. At last, the main challenges and issues of these inertia controls are attempted to explain and address.

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Active Voltage Feedback Control for Hybrid Multiterminal HVDC System Adopting Improved Synchronverters

Cited by 82 publications

References 27 publications

Review of VSG Control-Enabled Universal Compatibility Architecture for Future Power Systems with High-Penetration Renewable Generation

Review of VSG Control-Enabled Universal Compatibility Architecture for Future Power Systems with High-Penetration Renewable Generation

Review and Applications of Virtual Synchronous Machines Technologies

Enabling Inertial Response of Variable-Speed Wind Turbines: A Survey and New Perspectives

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