Probabilistic Assessment of the VSC-HVDC Contribution in Voltage Stability Applied to a Hybrid DC-Multi-Infeed Scenario

Oliveira, Diego de S. de; Souza, Marcos Jorge; Leal, Gustavo Cezimbra B.; Alves, Fábio A. L.; Aredes, Maurício

doi:10.1109/iecon43393.2020.9254694

Cited by 2 publications

(2 citation statements)

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“…Considering a given Q k for two line lengths l 1 and l 2 , with l 1 < l 2 , then V n(l 1 ) > V n(l 2 ) , as shown in Figure 11. Therefore, to match the effect of varying power dispatch on different line lengths, the two final voltages of interest must be equal, as in Equation (25).…”

Section: Evaluation Methods Of Icfiimentioning

confidence: 99%

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An Analysis on the VSC-HVDC Contribution for the Static Voltage Stability Margin and Effective Short Circuit Ratio Enhancement in Hybrid Multi-Infeed HVDC Systems

et al. 2023

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Over the years, high voltage transmission of large energy blocks over long distances has widely developed from the Line Commutated Converter (LCC) technology. However, the continuous expansion of the AC network and the increase in renewable energy penetration leads to the weakening of Electric Power Systems (EPS), causing operational problems for the LCC-HVDC. This paper evaluates the degree of contribution of the VSC-HVDC on the LCC-HVDC dynamic performance when the infeed is in a hybrid multi-infeed HVDC system. Through a steady-state mathematical framework, the new concept of Hybrid Power Voltage Interaction Factor (hPVIF) is proposed to assess the transient stability improvement of LCC. Additionally, this article introduces two key contributions from hPVIF: the complementary Improved Commutation Failure Immunity Index (iCFII), as a measure of the effective short circuit enhancement, as well as the apparent line length, which emulates the line lengths adjusting the power dispatch in the VSC-HVDC. PSCAD/EMTDCTM time-domain dynamic simulations are performed to assess the indexes, and the Matlab® software will be used to assist in mathematical operations.

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Section: Evaluation Methods Of Icfiimentioning

confidence: 99%

“…Other publications bring positive results in the performance improvement of the LCC-HVDC when a VSC-HVDC operates in their geographic proximity. Some papers discussed the VSC-HVDC control modes at length, mainly when operating within a multi-infeed system [22][23][24][25], in both transient and steady-state performance.…”

Section: Introductionmentioning

confidence: 99%

An Analysis on the VSC-HVDC Contribution for the Static Voltage Stability Margin and Effective Short Circuit Ratio Enhancement in Hybrid Multi-Infeed HVDC Systems

et al. 2023

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A Probabilistic Framework for the Robust Stability and Performance Analysis of Grid-Tied Voltage Source Converters

2022

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This paper proposed a probabilistic framework that could be used for the sensitivity assessment of grid-connected voltage source converters (VSCs), where uncertainties in the grid short circuit ratio (SCR) and operating point conditions, as well as control-loop interactions, were considered. The proposed method tried to broaden the available knowledge on the small-signal stability analysis of VSCs and provide a probabilistic point of view of this subject. It considered the probability of different operational conditions in order to obtain less conservatism and more accurate results. Based on uncertain inputs and the employed stability model, the proposed model produced statistical distributions of the critical mode and its damping factor and ratio, which were not accessible by existing deterministic methods. Crucial statistical information measures how much system stability and performance are maintained or changed over the system uncertainties and disturbances, as well as provides a clear insight into the system stability problem. For instance, as concluded in this paper, for the conventional control system design, fast dynamic parts of a VSC, such as the current controller and control delay, significantly impact the minimum damping ratio. Furthermore, slow dynamic parts, such as outer voltage control loops and the synchronization block, influence the maximum damping factor. For strong grids, the AC voltage magnitude controller (AVC) significantly impacts the maximum damping factor due to its lower bandwidth among all control loops. For weak grids, the damping factor of the critical mode is highly affected by interactions between the VSC, the power grid, and different control loops due to the synchronization mechanism. The other contributions of this paper were the introduction of robust stability and performance definitions and indices; explanations of the pros and cons of probabilistic assessment methods and their applicability; interpretation of the obtained results; and, finally, a link was provided between system stability and reliability, which will be crucial for future power system design.

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Probabilistic Assessment of the VSC-HVDC Contribution in Voltage Stability Applied to a Hybrid DC-Multi-Infeed Scenario

Cited by 2 publications

References 13 publications

An Analysis on the VSC-HVDC Contribution for the Static Voltage Stability Margin and Effective Short Circuit Ratio Enhancement in Hybrid Multi-Infeed HVDC Systems

An Analysis on the VSC-HVDC Contribution for the Static Voltage Stability Margin and Effective Short Circuit Ratio Enhancement in Hybrid Multi-Infeed HVDC Systems

A Probabilistic Framework for the Robust Stability and Performance Analysis of Grid-Tied Voltage Source Converters

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