Offshore AC grid management for an AC integrated VSC-HVDC scheme with large WPPs

Shah, Rakibuzzaman; Barnes, Mike; Preece, Robin

doi:10.1109/pesgm.2016.7741225

Cited by 3 publications

(3 citation statements)

References 10 publications

(14 reference statements)

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“…The AC-DC grid is modelled in DIgSILENT Power Factory 17.0 [20]. The detailed parameters of WPPs can be found in [21] and the references therein. The parameters related to VSC-MTDC system are given in the Appendix.…”

Section: Test Systemmentioning

confidence: 99%

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Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

Shah¹,

Barnes²,

Preece³

2019

15th IET International Conference on AC and DC Power Transmission (ACDC 2019)

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Multi-terminal DC (MTDC) grids are becoming increasingly popular for interconnecting non-synchronous generating resources such as offshore wind power plants (WPPs). The benefit of MTDC systems is that they can be reconfigured during contingencies to maintain the supply of power to the host AC systems. DC grid reconfiguration in MTDC systems will inevitably change the power injections to the host AC system, and will thus affect the dynamic behaviour of the AC system. This paper investigates the dynamic behaviour of the representative Great British (GB) transmission system (i.e. a reduced order dynamic model) for a series of reconfigurations in a meshed MTDC grid connecting offshore WPPs to the system. Hierarchical control strategies for the MTDC system including a DC power flow solver (PFS) and pilot voltage droop (PVD) are compared. From the analysis, it is observed that the reconfiguration of MTDC grid has a notable impact on large-disturbance dynamics of the GB transmission system.

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Section: Test Systemmentioning

confidence: 99%

“…0.2-1.0 Hz), and the corresponding damping ratios (% damping) are calculated and reported. The largedisturbance rotor angle stability of the host AC system is assessed in this work by the transient stability index (TSI) presented in [21]. The TSI is given as (3) [21]:…”

Section: Numerical Study 41 Stability Indicesmentioning

confidence: 99%

Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

Shah¹,

Barnes²,

Preece³

2019

15th IET International Conference on AC and DC Power Transmission (ACDC 2019)

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“…At present, the sending-end VSC station connecting to the islanded system normally adopts a constant voltage constant frequency (CVCF) control strategy [11,12]. Under such a control strategy, the active power of the islanded VSC station depends entirely on the real-time active power of the islanded system, so all the fluctuations of the wind energy power will transmit to the receive-end grid.…”

Section: Introductionmentioning

confidence: 99%

A Self-Regulation Strategy for the Power Fluctuation of the Islanded Voltage Source Converter (VSC) Station Delivering Large-Scale Wind Power

et al. 2020

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When the power source of a voltage source converter (VSC) station at the sending end solely depends on wind power generation, the station is operating in an islanding mode. In this case, the power fluctuation of the wind power will be entirely transmitted to the receiving-end grid. A self-regulation scheme of power fluctuation is proposed in this paper to solve this problem. Firstly, we investigated the short-time variability characteristic of the wind power in a multi-terminal direct-current (MTDC) project in China. Then we designed a virtual frequency (VF) control strategy at the VSC station based on the common constant voltage constant frequency (CVCF) control of VSC station. By cooperating with the primary frequency regulation (PFR) control at the wind farms, the self-regulation of active power pooling at the VSC station was realized. The control parameters of VF and PFR control were carefully settled through the steady-state analysis of the MTDC grid. The self-regulation effect had been demonstrated by a twenty-four-hour simulation. The results showed that the proposed scheme could effectively smoothen the power fluctuation.

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Advanced Grid-Forming Control of HVDC Systems for Reliable Grid Restoration

Mahr

Jaeger

2018

2018 IEEE Power &Amp; Energy Society General Meeting (PESGM)

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Offshore AC grid management for an AC integrated VSC-HVDC scheme with large WPPs

Cited by 3 publications

References 10 publications

Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

Impact of MTDC Grid Reconfiguration and Control on the Dynamics of the GB System

A Self-Regulation Strategy for the Power Fluctuation of the Islanded Voltage Source Converter (VSC) Station Delivering Large-Scale Wind Power

Advanced Grid-Forming Control of HVDC Systems for Reliable Grid Restoration

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