Economy Analysis of Flexible LCC-HVDC Systems with Controllable Capacitors

Chen, Nan; Zha, Kunpeng; Qu, Haitao; Li, Fangling; Yang, Xue; Zhang, Xiaoping

doi:10.17775/cseejpes.2022.01620

Cited by 13 publications

(6 citation statements)

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“…Line commutated converter based high voltage direct current transmission system (LCC-HVDC) has been widely used in long-distance high-capacity transmission scenarios. However, the LCC at the inverter side is prone to commutation failure due to the operation and control characteristics of the thyristors [1]. In contrast, voltage source converter based HVDC system (VSC-HVDC) uses controllable devices such as IGBTs instead of thyristors, so VSC is immune to the commutation failure problem.…”

Section: Introductionmentioning

confidence: 99%

Research on AC fault ride through strategy for LCC-VSC based on trigger angle clamp control

Hu,

Wang,

Huo

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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The hybrid line commutated converter (LCC)-voltage source converter (VSC) high voltage direct current transmission system has both the advantages of LCC and VSC technology. However, once an AC fault occurs at the receiving end, the DC voltage will rise sharply due to the unbalanced power. To tackle this DC overvoltage problem, one AC fault ride through strategy for LCC-VSC based on trigger angle clamp control is proposed. Firstly, the DC overvoltage mechanism of LCC-VSC is studied. Then the trigger angle clamp control strategy for LCC is discussed, based on which an AC fault ride through strategy is proposed. The trigger angle clamp control strategy can maximize the control capability of the overvoltage problem by clamping the trigger angle to the maximum value when the AC fault occurs. The comparative simulation results in PSCAD/EMTDC can validate the effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Research on AC fault ride through strategy for LCC-VSC based on trigger angle clamp control

Hu,

Wang,

Huo

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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“…High-voltage direct current technology, including LCC-HVDC and VSC-HVDC, plays an important role in power transmission and allocation, as well as variable renewable energy (VRE) regulation Alves et al, 2020). LCC-HVDC power transmission technology has the advantages of large transmission capacity, a high voltage level, low manufacturing cost, and high reliability (Kwon et al, 2018;Chen et al, 2022), making it widely used in large-capacity and long-distance power transmission systems. VSC-HVDC power transmission technology (Flourentzou et al, 2009;Wang R. et al, 2020;Zhao and Tao, 2021;Xu et al, 2023) has advantages of flexible control and easy power flow reversal, making it more advantageous in the fields of large-scale renewable energy integration , passive grid power supply, and multi-terminal HVDC transmission (Rao et al, 2019;Li et al, 2021a;Li et al, 2021b;Li et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Planning and Operation Strategies for Enhancing Power System Flexibility in Low-Carbon Energy Transition

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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“…The distribution of energy and load in China is extremely imbalanced. Wind and solar energy are mainly concentrated in the northwestern region of China, while the load center is located in the economically developed eastern coastal region [1]- [2]. Therefore, building longdistance and large-capacity ultra-high voltage direct current transmission systems to transport renewable energy to the load center is an important way to promote the consumption of renewable energy, realize energy conservation and emission reduction, and alleviate the contradiction between China's energy resources and economic layout.…”

Section: Introductionmentioning

confidence: 99%

Dynamic reactive power optimization strategy for AC/DC hybrid power grid considering different wind power penetration levels

Feng,

et al. 2024

IEEE Access

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With the increasing capacity of wind power integration and the further development of AC/DC hybrid power grids, the problem of voltage stability in the receiving end has become increasingly severe. The installation of dynamic reactive power compensation devices is a feasible measure to improve the voltage stability of the receiving end power grid. This paper proposes a dynamic reactive power optimization strategy for AC/DC hybrid power grids considering the integration of new energy sources. Firstly, a detailed mathematical model of the AC/DC hybrid system is established. In order to enhance the voltage restoration capability after a fault, the definition of a fault recovery indicator is provided. Subsequently, an optimal scheduling strategy for dynamic reactive power compensation devices is formulated to maximize the value of the fault recovery indicator. Considering the nonlinearity and non-convexity of the optimization model, trajectory sensitivity method and whale optimization algorithm are adopted to enhance the solution efficiency. Finally, an improved IEEE-9 test system is employed to demonstrate the effectiveness and feasibility of the proposed approach.INDEX TERMS AC/DC hybrid power grids; wind power; dynamic reactive power; fault recovery indicator; trajectory sensitivity method; whale optimization algorithm

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Economy Analysis of Flexible LCC-HVDC Systems with Controllable Capacitors

Cited by 13 publications

References 0 publications

Research on AC fault ride through strategy for LCC-VSC based on trigger angle clamp control

Research on AC fault ride through strategy for LCC-VSC based on trigger angle clamp control

Planning and Operation Strategies for Enhancing Power System Flexibility in Low-Carbon Energy Transition

Dynamic reactive power optimization strategy for AC/DC hybrid power grid considering different wind power penetration levels

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