On the stability analysis of multiple parallel inverters using the impedance multiplication effect

Cavazzana, Francesco; Mattavelli, Paolo; Corradin, Michele; Toigo, Igino

doi:10.1049/cp.2016.0213

Cited by 8 publications

(6 citation statements)

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“…The offshore grid voltage is ramped up over a period of 100 ms. The so‐called impedance multiplication effect means that the full aggregated wind farm will not connect to the grid at once, as the combined wind farm will see a much weaker grid than the individual wind turbines are expecting [19]. For this reason, the number of wind turbines in the farm is set as a variable and is kept at one turbine until 0.5 s, at which point it is ramped up to the full number over 0.2 s. Meanwhile, the wind turbine output power is ramped up over 0.5 s, starting at 0.5 s. This occurs simultaneously for all three wind farms.…”

Section: Simulation Resultsmentioning

confidence: 99%

DC protection for a multi‐terminal HVDC network including offshore wind power, featuring a reduced DC circuit breaker count

Parker¹,

Holliday²,

Finney

2019

J. eng.

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Section: Simulation Resultsmentioning

confidence: 99%

DC protection for a multi‐terminal HVDC network including offshore wind power, featuring a reduced DC circuit breaker count

Parker¹,

Holliday²,

Finney

2019

J. eng.

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“…Three-phase induction heaters would lead to power drops and unbalance of grid voltage. Additional equipment to compensate harmonics, reactive power, or voltage imbalances, will have complex interaction in power-electronic-based power system [14][15].…”

Section: System Modelingmentioning

confidence: 99%

An Improved Droop Control Strategy for Grid-connected Inverter Power Stability and Harmonic Suppression Under Grid Fluctuation and Inter-harmonics

Xu¹,

B²,

Liu³

et al. 2021

Preprint

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This paper presents an improved droop control strategy for grid-connected inverter power stability and power quality under distorted with consideration of grid fluctuation and inter-harmonics. An instantaneous frequency without PLL and amplitude of capacitor voltage feed-forward control strategy is given to power stability control, meanwhile a grid current feedback control is given by an incomplete derivation with a high-pass filter, so that the harmonics and inter-harmonics current can be suppressed. These approaches can provide both good active and reactive power dynamic response under fluctuation of frequency, and rejection ability against harmonic and inter-harmonic voltage. Based on model of inverter, the proposed control strategies are designed in detail. Simulations and experiments are present to validate the effectiveness of proposed method.

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“…The use of three-phase induction heaters could lead to power drops and an imbalance of grid voltage. Additional equipment to compensate for the harmonics, reactive power, or voltage imbalance would add a complex interaction to the electronic-based power system [15,16].…”

Section: System Modelingmentioning

confidence: 99%

An Improved Droop Control Strategy for Grid-Connected Inverter Applied in Grid Voltage Inter-Harmonics and Fundamental Frequency Fluctuation

Wang

Liu

et al. 2021

Electronics

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This paper presents a current suppression method based on a droop control strategy under distorted grid voltage with inter-harmonics and fundamental frequency fluctuation. In this proposed strategy, the current incomplete derivation controller is employed to decrease the negative impact caused by harmonic and inter-harmonic grid voltage. This method provides a good dynamic response and has low complexity against the inter-harmonics with unfixed fundamental frequency. Based on a mathematical model of the grid-connected inverter, we designed novel instantaneous frequency detection and feed-forward methods to suppress the grid fundamental frequency fluctuation impacts. Then the main parameters were analyzed. The simulation and experimental results verified the feasibility and effectiveness of the proposed method.

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On the stability analysis of multiple parallel inverters using the impedance multiplication effect

Cited by 8 publications

References 0 publications

DC protection for a multi‐terminal HVDC network including offshore wind power, featuring a reduced DC circuit breaker count

DC protection for a multi‐terminal HVDC network including offshore wind power, featuring a reduced DC circuit breaker count

An Improved Droop Control Strategy for Grid-connected Inverter Power Stability and Harmonic Suppression Under Grid Fluctuation and Inter-harmonics

An Improved Droop Control Strategy for Grid-Connected Inverter Applied in Grid Voltage Inter-Harmonics and Fundamental Frequency Fluctuation

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