The impact of MVDC links on distribution networks

Zuelli, Roberto; Chiumeo, R.; Gandolfi, Chiara; Clerici, Alessio; Pugliese, Salvatore; Fratti, Stefano; Garocchio, Maurizio

doi:10.23919/aeit.2018.8577442

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…Fig. 3(a) shows the response of both controls when tuned to achieve an equivalent damping (𝜁 = 0.7) for the 𝜔 7 → 𝑃 456 tfs (3)(4)(5)(6). Despite the equivalent tuning, the GFM droop control appears to be less damped than the Synchronverter.…”

Section: Dynamic Response Equivalencementioning

confidence: 99%

“…Voltage deviations resulting from the intermittent RESs and inflexible AC networks can also reduce the reliability of the power supply. Medium-voltage DC (MVDC) links are being proposed to solve these issues [4][5]. Traditional radial networks can be reinforced using the MVDC links, creating meshed hybrid AC-DC networks [4].…”

Section: Introductionmentioning

confidence: 99%

“…Medium-voltage DC (MVDC) links are being proposed to solve these issues [4][5]. Traditional radial networks can be reinforced using the MVDC links, creating meshed hybrid AC-DC networks [4]. The MVDC links are interfaced by highly controllable converters that can achieve bi-directional flow and reactive power compensation and hence higher network utilisation [5].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of droop and VSM equivalence considering the cascaded control dynamics

Harrison¹,

Henderson²,

Papadopoulos³

et al. 2021

The 17th International Conference on AC and DC Power Transmission (ACDC 2021)

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Grid Forming (GFM) converters are changing the way that power converters interact with the network to resemble synchronous machines (SM). Several GFM technologies including the Synchronverter, a particular member of Virtual Synchronous Machine (VSM), and GFM droop, based on standard current control and droop, have been suggested. The controllers have been compared and found to be equivalent to each other in steady state. The equivalence generally focusses on individual operating conditions and fails to address differences in dynamic properties. This paper provides a clear tuning guide of both controls in terms of SM properties and a discussion of the analytical equivalence using the output of time-domain medium-voltage DC (MVDC) converter models. Initially, the GFM droop is found to be less damped despite the equivalent tuning in terms of damping ratio. A parametric sweep of the cascaded control present within the GFM droop finds that the Voltage Control bandwidth and proportional gain can be tuned to adjust the damping of the response. The Voltage Control parameters are also found to affect the GFM droop's stability.

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Section: Dynamic Response Equivalencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of droop and VSM equivalence considering the cascaded control dynamics

Harrison¹,

Henderson²,

Papadopoulos³

et al. 2021

The 17th International Conference on AC and DC Power Transmission (ACDC 2021)

View full text Add to dashboard Cite

show abstract

“…Moreover, if needed, an outer reactive power control-loop can be implemented to define proper terminal voltage references. 34,35 Figure 2 shows a diagram of MVDC topology together with the control blocks required for its operation.…”

Section: Mvdc Systemsmentioning

confidence: 99%

Analysis of the behavior of MVDC system in a distribution grid compared to a UPFC system

Herrera

Zorita-Lamadrid

Duque-Pérez

et al. 2021

Int Trans Electr Energ Syst

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The increase in electricity demand, the incorporation of renewable energies, or * , reference input current, d-axis; i 1q , input current, qaxis; i 2 , output current; i 2d , output current, d-axis; i 2d *, reference output current, d-axis; i 2q , output current, q-axis; i 2q *, reference output current, qaxis; IGBT, insulated gate bipolar transistor; MVDC, medium voltage direct current; P 2 , output active power; P 2 * , reference output active power; P ns , nominal active power VSC2; P nsh , nominal active power VSC1; P s , controlled active power; PWM, pulse width modulation; Q 1 , input reactive power; Q 2 , output reactive power; Q 2 * , reference output reactive power; Q s , controlled reactive power; R L1 , resistance AC line 1; R L2 , resistance AC line 2; R s , coupling resistance VSC2; R sh , coupling resistance VSC1; rt s , transformation relation VSC2; rt sh , transformation relation VSC1; UPFC, unified power flow converter; v 1 , input voltage; v 2 , output voltage; v c , injected series voltage; v cd , series voltage, d-axis; v cd * , reference series voltage, d-axis; v cq , series voltage, q-axis; v cq * , reference series voltage, q-axis; V cs , nominal voltage VSC2; V csh , nominal voltage VSC1; v dc , direct voltage; VSC, voltage sourced converter; VSC1, voltage sourced converter 1; VSC2, voltage sourced converter 2; X L1 , reactance AC line 1; X L2 , reactance AC line 2; X s , coupling reactance VSC2; X sh , coupling reactance VSC1; Θ 1 , phase angle bus 1; Θ 2 , phase angle bus 2.

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Operation Algorithm of Protection Coordination for Isolating Fault Section in Radial MVDC Distribution System

Lee

Han

Choi

et al. 2022

J. Electr. Eng. Technol.

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The impact of MVDC links on distribution networks

Cited by 9 publications

References 5 publications

Assessment of droop and VSM equivalence considering the cascaded control dynamics

Assessment of droop and VSM equivalence considering the cascaded control dynamics

Analysis of the behavior of MVDC system in a distribution grid compared to a UPFC system

Operation Algorithm of Protection Coordination for Isolating Fault Section in Radial MVDC Distribution System

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