Availability analysis of VSC-HVDC schemes for offshore windfarms

Beddard, Antony; Barnes, Michael

doi:10.1049/cp.2012.0345

Cited by 12 publications

(18 citation statements)

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“…To better understand how the above-mentioned formulations work, in this section, the reliability of a hypothetic ±320 kV HVDC-VSC converter, composed of 4.5 kV SMs, has been calculated as a function of: The preliminary step of this analysis is to know the converter SM failure rates λ SM . These data were inferred from [40,41] based on the SM typology, i.e., stack pack or high pack SM. The second step is to choose the scheduled maintenance period T M of the converter.…”

Section: Converter Reliability As a Function Of The Redundancy Configmentioning

confidence: 99%

“…This constraint implies an extremely high probability of uninterrupted operation of the MMC during the scheduled maintenance interval (two years). The number of IGBTs is the same for each analyzed converter configuration, with λ SM = 0.004 and λ d = 0.001 [40][41][42] (for the warm standby configuration).…”

Section: Converter Reliability As a Function Of The Redundancy Configmentioning

confidence: 99%

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Availability Analysis of HVDC-VSC Systems: A Review

2019

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This work stems from the worldwide increasing need to precisely consider, in the design phase of an HVDC project, the availability of the HVDC system. In this paper, an overview of the availability assessment methods for HVDC-VSC transmission systems is presented. In particular, the state of the art of the procedures to estimate the availability of both the HVDC link reparable components and the conversion system on the basis of the converter configuration is given. The theoretical fundamentals of each method, together with their practical applications, have been described, in order to highlight the limits and the potentialities of each approach. The authors aim at giving a guide to choosing the best computation approach on the basis of the specific needs of the users and at summarizing all the key aspects which can be taken into account during the availability assessment of HVDC-VSC links.

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Section: Converter Reliability As a Function Of The Redundancy Configmentioning

confidence: 99%

Section: Converter Reliability As a Function Of The Redundancy Configmentioning

confidence: 99%

Availability Analysis of HVDC-VSC Systems: A Review

2019

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“…Reliability indices of the VSC-HVDC converter station components is given in Table III. In general, the difference between offshore and onshore components is the repair time because it needs more time to access offshore platform [30]. It is assumed that all VSC-HVDC listed in Table II are of symmetric monopole with modular multilevel converter (MMC) scheme.…”

Section: Benefits Of Mtdc Transmission Systemmentioning

confidence: 99%

“…Therefore, the availability for PtP link can be calculated by multiplying all of these components together. The failure rate of a 100 km submarine DC cable equals to 0.07 occurrence/yr with the repair time equals 60 days [30], [31]. The availability of the underground DC cable is expected to be higher, i.e.…”

Section: Benefits Of Mtdc Transmission Systemmentioning

confidence: 99%

An initial topology of multi-terminal HVDC transmission system in Europe: A case study of the North-Sea region

Irnawan

Silva

Bak

et al. 2016

2016 IEEE International Energy Conference (ENERGYCON)

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In this paper, technical challenges for realizing offshore multi-terminal HVDC (MTDC) transmission system in Europe is evaluated. An offshore MTDC topology is projected by interconnecting point-to-point HVDC links with the same voltage level and technology found in southeastern part of North Sea. Availability analysis is done to evaluate the feasibility of the proposed offshore MTDC topology. As compared to point-topoint (PtP) HVDC link, MTDC operation gives a more secure and reliable system. This paper shows that the proposed MTDC topology can operate 98.36% of the time.

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“…AC transmission is not suitable for distances longer than 50 km [4]. It is widely recognised that wind integration using voltage source converter (VSC) based high-voltage direct-current (HVDC) transmission systems offers a higher efficiency, reliability and bulk power transmission over long distances [5], [6].…”

Section: Introductionmentioning

confidence: 99%

An IGBT based series power flow controller for multi-terminal HVDC transmission

Balasubramaniam

Liang

Ugalde‐Loo

2014

2014 49th International Universities Power Engineering Conference (UPEC)

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Increased offshore wind penetration has raised the need of multi-terminal high-voltage direct-current (MTDC) grids. An MTDC system will enable cross-border energy exchange where the excessive energy can be transferred between countries, increasing the functionality and reliability of the network. However, as the number of terminals and branches increases, power flow management becomes a challenge. To improve reliability and efficiency, power flow needs to be rescheduled between terminals. This can be achieved by introducing a power flow controller (PFC). In this paper, an insulated-gate bipolar transistor based series PFC is proposed. A PFC is basically a low power rated controllable voltage source connected in series with a DC line. It enables the regulation of grid power flow via a small series voltage injection. A four-terminal MTDC system is modelled using Simulink/ SimPowerSystems to test the impact of the proposed device. This is analysed under two different control strategies for the voltage source converter-based terminals; namely, masterslave and voltage droop control. Simulation results show that the PFC is capable of enhancing the system performance by suitably redirecting the power flow at the point of connection. Moreover, the results clearly illustrate that the converter control modes effectively affect the power flow in the MTDC grid.

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Availability analysis of VSC-HVDC schemes for offshore windfarms

Cited by 12 publications

References 0 publications

Availability Analysis of HVDC-VSC Systems: A Review

Availability Analysis of HVDC-VSC Systems: A Review

An initial topology of multi-terminal HVDC transmission system in Europe: A case study of the North-Sea region

An IGBT based series power flow controller for multi-terminal HVDC transmission

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