HVDC Light for large offshore wind farm integration

Das, Debrup; Pan, Jiuping; Bala, Sandeep

doi:10.1109/pemwa.2012.6316363

Cited by 38 publications

(27 citation statements)

References 2 publications

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“…N electrical power networks, voltage source converter highvoltage direct current (VSC-HVDC) transmission has been used extensively because of its ability to flexibly control power flows and to connect to AC weak grids [1]. For the interconnection of offshore wind power generation far from shore to AC systems, VSC-HVDC is the preferred technology due to its smaller footprint and more advanced/flexible control compared to the LCC-HVDC technology.…”

Section: Introductionmentioning

confidence: 99%

Secondary Model Predictive Control Architecture for VSC-HVDC Networks Interfacing Wind Power

Sánchez

Marjanović

Barnes

et al. 2020

IEEE Trans. Power Delivery

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This paper proposes a secondary Model Predictive Control (MPC) based architecture to provide DC voltage and DC power control to MT VSC-HVDC networks interfacing wind power generation. The proposed architecture places the controller at a supervisory level, thus providing coordination amongst existing converters' local droop controllers. Droop control is a type of decentralized DC voltage/power control. Hence, in case of secondary controller failure, droop control acts as a contingency control scheme. A simplified linear dynamic model of the MT VSC-HVDC network is utilised for the MPC's design, thus minimizing computational effort needed to compute secondary control action. Updates of droop gains and offshore and onshore "AC" variables, in the dq domain, are explicitly considered as measured input disturbances within the formulation of the MPC controller, thus, ensuring appropriate control response in order to minimise adverse impact of their variation on the overall system's performance, particularly under wind power variations. Simulation results show that MPC, whose design is based on the system's simplified linear model, is capable of delivering satisfactory performance when applied to the high fidelity non-linear full order model of a six-terminal VSC-HVDC network simulated in PSCAD.

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Section: Introductionmentioning

confidence: 99%

Secondary Model Predictive Control Architecture for VSC-HVDC Networks Interfacing Wind Power

Sánchez

Marjanović

Barnes

et al. 2020

IEEE Trans. Power Delivery

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“…[12,17]. Most of the major worldwide power electronics manufacturers such as Siemens, ABB and Alstom are offering this technology nowadays [7,4,3].…”

Section: Introductionmentioning

confidence: 99%

Efficient model for modular multi-level converter simulation

Vidal-Albalate

Belenguer

Beltrán

et al. 2016

Mathematics and Computers in Simulation

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Detailed models of modular multi-level converters (MMCs) are cumbersome for electromagnetic transient simulation programs because of their high number of components which involve large simulation times. In this work, the modeling of an MMC is addressed with the objective of reducing the simulation time. First, the MMC structure is presented, including the modulation technique, the voltage balancing algorithm and the circulating current control used to validate the model. Next, an efficient simplified model is proposed. This is formed by just one variable voltage source, one variable capacitor and one variable resistor per arm, regardless of the number of submodules. This simplified model allows the simulation time to be reduced while keeping the dynamics of the MMC. The comparison through several PSCAD simulations with a detailed 5-level MMC model proves its validity during both steady-state and transient conditions (ac and dc short-circuits).

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“…The great distance to shore has made high voltage direct current (HVDC) a necessity in transporting offshore wind energy to customers on shore to eliminate reactive power requirements and reduce cabling cost and complexity [9].…”

Section: Introductionmentioning

confidence: 99%

A new wind turbine interface to MVDC grid with high frequency isolation and input current shaping

Daniel

Krishnamoorthy

Enjeti

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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This work introduces a new approach using high frequency (HF) isolation for interfacing next-generation offshore wind turbine generators (WTGs) to medium voltage DC (MVDC) collection grids, a necessity for the continued development of offshore wind resources as farms are sited further out to sea. Initial analysis of the proposed approach is provided, as well as a practical design example for reproduction of results and prototype design guidance for further development of the concept. Detailed simulation results demonstrate converter operation from full rated power down to 25% rated power. The WTG displacement power factor is found to be 0.95 leading. Simulation results further confirm near-sinusoidal WTG and transformer current, continuous output current, and stiff DC link voltage, all within specified ripple tolerances.

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HVDC Light for large offshore wind farm integration

Cited by 38 publications

References 2 publications

Secondary Model Predictive Control Architecture for VSC-HVDC Networks Interfacing Wind Power

Secondary Model Predictive Control Architecture for VSC-HVDC Networks Interfacing Wind Power

Efficient model for modular multi-level converter simulation

A new wind turbine interface to MVDC grid with high frequency isolation and input current shaping

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