The On-site Verification of Key Technologies for Kunbei-Liuzhou-Longmen Hybrid Multi-terminal Ultra HVDC Project

doi:10.17775/cseejpes.2022.04780

Cited by 7 publications

(3 citation statements)

References 7 publications

(8 reference statements)

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“…Hybrid HVDC transmission technology (Rao et al, 2022) combines the technical advantages of LCC-HVDC and VSC-HVDC, which not only overcomes the challenges of long-distance transmission with high-power but also solves VRE integration, power quality, and grid asynchronous interconnection in a power system, and is gradually applied in engineering. Currently, the Wu-dong-de Hybrid DC Project and the Jian-su Hybrid cascaded MTDC Project in China are in operation and have proven their worth (Haleem et al, 2019;Reza Ahrabi 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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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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“…In some cases, the transmission system can be non-homogeneous, incorporating a mix of underground cables and overhead lines. This non-homogeneity arises due to the changing nature of the right-of-way, as seen in projects like offshore wind farms [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Protection of HVDC Transmission Systems for Integrating Renewable Energy Resources

Zaky,

Ahmed,

Elsadd

et al. 2023

Eng. Technol. Appl. Sci. Res.

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This paper introduces a fault locator approach designed for non-homogeneous VSC-HVDC (Voltage Source Converter-High Voltage Direct Current) transmission circuits. In various projects, such as those involving offshore wind farms, the transmission circuit's right-of-way can be non-homogeneous, incorporating a mix of underground cables and overhead lines. This diversity in circuit configuration poses issues with fault location approaches. The proposed method involves measuring signals at two sides of the non-homogeneous transmission circuit. Initially, the faulted section is identified using a specific criterion. This criterion calculates the profile of the 1-mode component of the voltage along the transmission circuit, without considering its non-homogeneous nature. This method is founded upon disparities in the voltage change rate between power cables and overhead lines. The provided identification method does not depend on the calculation of fault distances. Subsequently, the faulty point within the selected section is obtained by updating the calculated voltage profile. Notably, our method does not necessitate the installation of additional sensors at junction points. Furthermore, the introduced approach has the capability to locate various fault types, including pole-to-pole and pole-to-ground faults, and it remains effective regardless of the fault resistance value. These investigations were conducted using PSCAD software as a simulation environment, with the proposed method's calculations executed in MATLAB.

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Section: Introductionmentioning

confidence: 99%

A decision-making method for the operation flexibility enhancement of hybrid cascaded MTDC

Wang,

Li,

Zhang

2023

Front. Energy Res.

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To enable the integration of large-scale renewable energy, hybrid HVDC technology, which combines the technical advantages of LCC-HVDC and VSC-HVDC, is being gradually deployed in the power grid nowadays. The operation of the Wu-dong-de Hybrid DC Project and the Jian-su Hybrid cascaded MTDC Project has proved its advantages. However, for the simultaneous application of different converter station technologies in the system, the control strategies become complex. Issuing appropriate control instructions to ensure system stability according to operational requirements is an issue that cannot be ignored in decision-making. Even under abnormal conditions, when the topology changes due to various failure scenarios, reasonable decision-making and precise control instruction definitions are required. To achieve flexible planning of the MTDC system, this paper presents a decision-making method for control strategies of a hybrid cascaded MTDC system, which analyzes the control strategy combinations selected for normal and abnormal conditions of the MTDC system. In addition, a control instruction calculating method and decision-making process for precise control in normal and abnormal control conditions is proposed. Simulation results based on a five-terminal hybrid cascaded MTDC in PSCAD/EMTDC have verified the effectiveness of the proposed method.

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The On-site Verification of Key Technologies for Kunbei-Liuzhou-Longmen Hybrid Multi-terminal Ultra HVDC Project

Cited by 7 publications

References 7 publications

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

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

Protection of HVDC Transmission Systems for Integrating Renewable Energy Resources

A decision-making method for the operation flexibility enhancement of hybrid cascaded MTDC

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