The influence of MTDC control on DC power flow and AC system dynamic responses

Shen, Li; Wang, W.; Barnes, Mike

doi:10.1109/pesgm.2014.6939027

Cited by 8 publications

(7 citation statements)

References 7 publications

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“…This section will outline the MTDC grid control schemes necessary to enable reconfigurability during DC outage contingencies. Full details of standard controls for VSC-HVDC are not discussed in detail but can be found in [9]- [15].…”

Section: Mtdc Grid Controlmentioning

confidence: 99%

“…Based on the experience of AC system operation with frequency control, a voltage-power droop scheme is the preferred droop control for MTDC system [15], [17], as shown in Fig. 1.…”

Section: Droop Controlmentioning

confidence: 99%

“…A great deal of excellent research on MTDC grid operation has been undertaken including studies to investigate the influence of various MTDC primary controllers on DC power flow and AC system dynamics [15], but it is yet to be fully established as to how MTDC grid reconfiguration and various hierarchical controllers will affect AC system dynamics. From the AC system perspective, DC grid reconfiguration (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…) to avoid active power changes due to a small perturbation of DC voltage. The concept of dead-band based droop control is that a converter with dead-band control will operate in a constant power/current mode under typical conditions and will only participate in voltage control when the voltage thresholds are violated (the typical voltage threshold range for the dead-band droop is 1.015-0.975 pu[15]). …”

mentioning

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: Mtdc Grid Controlmentioning

confidence: 99%

“…Based on the experience of AC system operation with frequency control, a voltage-power droop scheme is the preferred droop control for MTDC system [15], [17], as shown in Fig. 1.…”

Section: Droop Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

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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show abstract

“…As one of the most important operational issues, stability of an MTDC/AC power system has been investigated from two main aspects. The first one is the stability of the MTDC as an independent system [12][13][14][15][16][17][18][19]. Small-signal stability analysis of the MTDC was examined by use of simulation [4,12] and modal computations in [13].…”

Section: Introductionmentioning

confidence: 99%