Reliability and Economic Evaluation of High Voltage Direct Current interconnectors for large-scale renewable energy integration and transmission

Thompson, A.; Kazemtabrizi, B.; Crabtree, C.J.; Dao, C.; Dinmohamdi, F.; Flynn, D.

Abstract

This paper outlines a methodology for assessing the reliability and cost of operating multi-terminal High-Voltage Direct Current (HVDC) transmission interconnectors with a comparison being drawn on the benefits of using modular multilevel converters (MMC). The MMCs random failure/repair processes are modelled as either a two-state or three-state Markov processes. A time-sequential Monte Carlo simulation is used to simulate the operation of the modified IEEE Reliability Test System (RTS) with the MMC-HVDC interconnectors, over a one-year period. The RTS accommodates variable wind generation, and the results confirm the use of HVDC as tie lines provide geographical aggregation, allowing for much greater penetration of variable generation in the connected systems. The three-state MMC model, in addition to the binary up and down states, consists of a derated state in which the converter voltage is reduced to 57.7% of its nominal voltage. The additional state was found to reduce the downtime of the link by 89.6%, increasing the available flow capacity by 458 GWh/year. The increase flow capacity leads to an increase in arbitrage revenue of €3.17m per year and a reduction in project payback time of 1.5 years.

Citation

Thompson, A., Kazemtabrizi, B., Crabtree, C., Dao, C., Dinmohamdi, F., & Flynn, D. (2019, February). Reliability and Economic Evaluation of High Voltage Direct Current interconnectors for large-scale renewable energy integration and transmission. Presented at 15th IET International conference on AC and DC Power Transmission, Coventry, UK

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 15th IET International conference on AC and DC Power Transmission
• Start Date: Feb 5, 2019
• End Date: Feb 7, 2019
• Acceptance Date: Sep 23, 2018
• Online Publication Date: Apr 18, 2019
• Publication Date: Jan 1, 2019
• Deposit Date: Oct 24, 2018
• Publicly Available Date: Oct 25, 2018
• Publisher: IET
• Book Title: 15th IET International Conference on AC and DC Power Transmission (ACDC 2019).
• DOI: https://doi.org/10.1049/cp.2019.0010
• Public URL: https://durham-repository.worktribe.com/output/1142935