The Upgrading Renovation of an Existing XLPE Cable Circuit by Conversion of AC Line to DC Operation

Ying, Li; Cao, Xiaolong; Fu, Mingli

doi:10.1109/tpwrd.2015.2496178

Cited by 33 publications

(29 citation statements)

References 10 publications

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“…V dc is chosen keeping in mind the insulation performance of the refurbished underground cables at √ 2 of the rms ac voltage rating [12]. It is possible that the cable ac to dc voltage enhancement factor can be chose higher, leading to further benefits with refurbished dc operation, but this should be incrementally done with field trials [5]. cos θ is the power factor of the load connected at the RSS.…”

Section: E Generic Equations Describing System Lossesmentioning

confidence: 99%

Boundaries of Operation for Refurbished Parallel AC–DC Reconfigurable Links in Distribution Grids

Shekhar

Ramírez-Elizondo

Soeiro

et al. 2020

IEEE Trans. Power Delivery

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Parallel ac-dc reconfigurable link technology can find interesting applications in medium voltage power distribution. A given system can operate in different configurations while maintaining equivalent capacity during (n-1) contingencies. It is proved that within the defined operating boundaries, a parallel ac-dc configuration has higher efficiency as compared to pure ac or pure dc power delivery. Using sensitivity analysis, the variations in these efficiency boundaries with power demand, power factor, grid voltages, link lengths, conductor areas and converter efficiency is described. It is shown that parallel ac-dc system can have smaller payback time as compared to a purely dc power transmission for the same capacity due to lower investment cost in converter station and superior efficiency. As compared to a purely ac system, the payback of a refurbished parallel acdc configuration can be less than 5 years for a 10 km, 10 kV distribution link within the specified assumptions and operating conditions.

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Section: E Generic Equations Describing System Lossesmentioning

confidence: 99%

Boundaries of Operation for Refurbished Parallel AC–DC Reconfigurable Links in Distribution Grids

Shekhar

Ramírez-Elizondo

Soeiro

et al. 2020

IEEE Trans. Power Delivery

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“…Specifically, the HVDC system has a rated power [32]. Each of the HVDC system converters consists of a converter transformer, 12 valves including multiple thyristor stacks, and five controllers in addition to the proposed DC current and voltage controllers.…”

Section: A Test System and Simulation Conditionsmentioning

confidence: 99%

Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

Kwon

Kim

Moon

2018

IEEE Trans. Power Delivery

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“…At present, voltage source converter (VSC) based MVDC technology is widely used in traction applications, shipboard power systems and is identified as a feasible option for offshore wind power collection systems and micro-grid applications [11]- [13]. Besides these, an MVDC system for the conversion of an existing AC line to DC operation has been considered to enhance the utilization of existing assets [4]- [6]. For instance, the "ANGLE DC" project which is the first MVDC link in Europe.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Average Converter Model for MVDC Link Harmonic Analysis

Joseph

Balasubramaniam

et al. 2019

2019 IEEE Milan PowerTech

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Medium-voltage direct-current (MVDC) technology has been widely considered as a key enabler to generate, convert and dispense electrical power with enhanced connectivity, security and quality. However, with the significant deployment of power electronics converters with high-switching frequency in MVDC systems, accurate analysis of system dynamic behavior such as harmonic distortions have become a computationally intensive task. To address these challenge average models of converters have been proposed to facilitate faster computation. However, these models only capture the steady-state characteristics of the system. To this end, in this paper, three types of time-domain based converter models: detailed, average and switching average models are presented for harmonic studies. The suitability of the modelling fidelity in reducing substantial simulation time has been validated with a practical converter topology used for the first MVDC link in Europe. Simulation based on the switching average model is shown to provide all relevant information as obtained from the detailed switching model while consuming considerably less computation time than the latter.

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The Upgrading Renovation of an Existing XLPE Cable Circuit by Conversion of AC Line to DC Operation

Cited by 33 publications

References 10 publications

Boundaries of Operation for Refurbished Parallel AC–DC Reconfigurable Links in Distribution Grids

Boundaries of Operation for Refurbished Parallel AC–DC Reconfigurable Links in Distribution Grids

Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

Dynamic Average Converter Model for MVDC Link Harmonic Analysis

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