A low frequency power collector alternative system for long cable offshore wind generation

Canelhas, A.; Karamitsos, S.; Axelsson, Urban; Olsen, Eric

doi:10.1049/cp.2015.0095

Cited by 5 publications

(1 citation statement)

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“…The combination of the large filter inductance and the cable capacitance has the impact of moving the resonant frequency of the combined filter and cable system to lower frequencies. This effect has been seen before in previous publications on LFAC transmission, Canelhas et al [13] found that for a 200 km transmission cable and BtB converter system the resonant frequency was close to 50 Hz. Large damping filters were used to maintain transmission system stability.…”

Section: Introductionsupporting

confidence: 83%

Design of VSC Connected Low Frequency AC Offshore Transmission With Long HVAC Cables

Ruddy

Meere

O’Loughlin

et al. 2018

IEEE Trans. Power Delivery

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Low Frequency AC transmission (LFAC) has been proposed as an alternative to High Voltage DC transmission for medium distance (80-150 km) offshore wind farms. Long HVAC cables and their associated low frequency resonance, connected to Voltage Source Converters (VSC) provide technical challenges for the control of the offshore voltage. This paper provides the design of the offshore voltage 'grid forming control', to maintain a stable offshore voltage accounting for the connection of a long HVAC cable connected to the VSC. Simulations are performed on a LFAC test system to examine the influence of controller parameters and the associated design trade offs between the selection of dq controller time constants and voltage control bandwidth. The LFAC system design and control is then validated in a hardware experiment where the proposed controller operates in a real time, hardware in the loop experiment.

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Section: Introductionsupporting

confidence: 83%