An Overview of HVDC Technology

Watson, N.R.; Watson, Jeremy D.

doi:10.3390/en13174342

Cited by 65 publications

(25 citation statements)

References 69 publications

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“…The bipolar and monopolar systems are different in configuration. In bipolar system, each terminal has two converter units while the monopolar system has only single converter unit at each end [38], [39]. Fig.…”

Section: B Bipolar and Monopolar Systems Configurationsmentioning

confidence: 99%

Single-End Based Fault Location Method for VSC-HVDC Transmission Systems

2022

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A single-end based fault location method is proposed for VSC (Voltage Sourced Converter) HVDC (High Voltage Direct Current) transmission systems. With the proposed method, there is no need for communication system to collect data from different locations and the need for checking data synchronization is avoided. The proposed method is derived from the relationship between the aerial and ground voltage components along the DC transmission system. Bergeron model equations are used for calculating the 1-mode and 0-mode voltages along the transmission system using the measured signals at a single end. The proposed method is generalized for locating both the pole-to-ground and pole-to-pole faults. The profile of the differences between the voltage components is studied with considering the effect of the fault resistance. Artificial neural network (ANN) is trained based on collected samples from different test cases. The proposed single-end based fault location method can successfully locate the fault and determine the fault resistance even with uncertain line parameters. The proposed method is theoretically validated by the help of PSCAD simulation platform. In addition, the effectiveness of the proposed method is verified based on real time measurements obtained from RTDS system.INDEX TERMS Fault location, fault detection, HVDC, voltage sourced converter (VSC), modular multilevel converter (MMC), energy storage, travelling wave model, pole-to-ground fault, pole-to-pole fault, artificial neural network (ANN), training.

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Section: B Bipolar and Monopolar Systems Configurationsmentioning

confidence: 99%

Single-End Based Fault Location Method for VSC-HVDC Transmission Systems

2022

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“…T HE utilization of sustainable energy has become an inevitable approach to achieve net-zero carbon emission. Facing the intermittent of renewable energy like wind or solar power, the DC technique provides a promising solution in renewable energy integration [1], [2]. With the decrease of difficulties in manufacturing and expense of semiconductor devices such as insulated gate bipolar transistor (IGBT), more research has been focused on voltage source converters (VSCs) due to their outstanding features.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Reference Power Based Voltage Droop Control for VSC-MTDC Systems

Wang¹,

Qiu²,

Liu

et al. 2023

Journal of Modern Power Systems and Clean Energy

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Featuring low communication requirements and high reliability, the voltage droop control method is widely adopted in the voltage source converter based multi-terminal direct current (VSC-MTDC) system for autonomous DC voltage regulation and power-sharing. However, the traditional voltage droop control method with fixed droop gain is criticized for over-limit DC voltage deviation in case of large power disturbances, which can threaten stable operation of the entire VSC-MTDC system. To tackle this problem, this paper proposes an adaptive reference power based voltage droop control method, which changes the reference power to compensate the power deviation for droop-controlled voltage source converters (VSCs). Besides retaining the merits of the traditional voltage droop control method, both DC voltage deviation reduction and power distribution improvement can be achieved by utilizing local information and a specific control factor in the proposed method. Basic principles and key features of the proposed method are described. Detailed analyses on the effects of the control factor on DC voltage deviation and imbalanced power-sharing are discussed, and the selection principle of the control factor is proposed. Finally, the effectiveness of the proposed method is validated by the simulations on a five-terminal VSC based highvoltage direct current (VSC-HVDC) system.

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“…A High Voltage Direct Current (HVDC) device based on Line-Commutated Converter (LCC) technology has been commonly used worldwide for over 60 years. It is now a viable alternative to HVAC transmission systems [1] [2]. To ensure these devices' security and dependability, the integrity, safety, and fast recovery from unbalancing situations must be assessed [3].…”

Section: Introductionmentioning

confidence: 99%

Protection of an HVDC Link Towards Modeling and Simulation Based DC Connection Defects

Mohamed¹,

Sami²

2022

Advances in Intelligent Systems Research

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This paper aims to study the DC-link faults and recovery scenarios based on a 12-pulse HVDC (High Voltage Direct Current) link system. DC-link to ground fault is considered as one of the most serious fault that can occur on HVDC-link. Therefore, in order to understand the system behavior in the presence of this type of fault, two DC-fault scenarios are investigated. One scenario is at the sending end of the rectifier, and the other is at the receiving end of the inverter. The faults are applied mainly to study the dynamic performance of the recovery of HVDC-link system after faults, and to validate the proposed DC fault protection function. Influence of the Voltage Dependent Current Order Limiter (VDCOL) function is also studied. The digital real-time simulator laboratory (RT-Lab) platform HYPERSIM (OP-5600) is used in modeling and simulation of the HVDC-link system by means of Software-In-the-Loop (SIL) approach. The maintenance of the system stability is investigated to ensure a high performance recovery from the fault. Ramp-up recovery method used in the DCbus voltage restoration provided by the VDCOL-function, and the validated operation of protection function against DC faults show high performance recovery from the faults. The results carried out ensure safe and desired recovery from the DC-bus faults.

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An Overview of HVDC Technology

Cited by 65 publications

References 69 publications

Single-End Based Fault Location Method for VSC-HVDC Transmission Systems

Single-End Based Fault Location Method for VSC-HVDC Transmission Systems

Adaptive Reference Power Based Voltage Droop Control for VSC-MTDC Systems

Protection of an HVDC Link Towards Modeling and Simulation Based DC Connection Defects

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