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Planning Reconfigurable Reactive Control for Voltage Stability Limited Power Systems
IEEE Transactions on Power Systems, 2009This paper proposes an optimization based method of planning reactive power control for electric transmission systems to endow them with the capability of being reconfigured to a secure configuration under a list of contingencies. The overall objective function is to minimize the installation cost of new controls such as mechanically switched ...
Haifeng Liu +5 more
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Reactive power limitation due to wind-farm collector networks
2015 IEEE Eindhoven PowerTech, 2015Type-3 and Type-4 wind turbines are capable of contributing to the reactive power required by wind-farms for supporting grid voltages. However, characterizing the maximum reactive power capability of a wind-farm by summing the individual generator ratings does not account for the effects of voltage variations over the radial collector network and can ...
Jonathon A. Martin, Ian A. Hiskens
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Too Close to Reactive Power Limits
2007 IEEE Power Engineering Society General Meeting, 2007This paper notes some incidents where disturbances were exacerbated by lack of reactive power to support voltages, and offers some comments on undervoltage load shedding to prevent cascading.
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Voltage dependent reactive power limits for voltage stability studies
IEEE Transactions on Power Systems, 1995This paper presents and studies a static model for synchronous generators with voltage dependent reactive power limits due to maximum stator current, maximum and minimum rotor (field) current as well as maximum rotor angle (underexcitation) limiters. The proposed generator model for static voltage stability studies can be included in an ordinary power ...
Lof, PA, Hill, DJ, Andersson, G
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IEEE Transactions on Power Systems, 2020
Voltage stability assessment on a deterministic direction of loading variation may provide misleadingly high values of voltage stability margin due to uncertainties in load forecast.
L. Neves, L. F. Costa Alberto
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Voltage stability assessment on a deterministic direction of loading variation may provide misleadingly high values of voltage stability margin due to uncertainties in load forecast.
L. Neves, L. F. Costa Alberto
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Generator reactive power limits and voltage stability
Fourth International Conference on Power System Control and Management, 1996Generator reactive power limit is a key factor in voltage instability. When the field or armature current limit becomes active, the generator reactive power limit becomes voltage dependent. These operational limits and the shifting between field limit and armature limit, are fully investigated.
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Sensitivity Based Thevenin Index With Systematic Inclusion of Reactive Power Limits
IEEE Transactions on Power Systems, 2018This paper presents proof for the relation between the Local Thevenin Index (LTI), measured at a Phasor Measurement Unit (PMU), that is used as an indicator of voltage stability, and the system operating condition. The derivation establishes that there is a direct connection between the sensitivity and the LTI and provides a mathematically rigorous ...
Amarsagar Reddy Ramapuram Matavalam +1 more
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The Consideration of Operational Limits in Power Transmission with Shunt Reactive Power Compensation
International Journal of Electrical Engineering & Education, 1990This paper presents a systematic procedure to determine the range of shunt compensation that can be added at the load end of a transmission line to maintain various operational limits of power systems which include the voltage stability limit. In this procedure different load characteristics are also considered.
V. Ajjarapu, Neil D. Hammer
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VSC's reactive power limited probabilistic power flow for AC/DC grids incorporating uncertainties
2016 International Conference on Probabilistic Methods Applied to Power Systems (PMAPS), 2016The speed of Probabilistic Power Flow (PPF) analysis for hybrid AC/DC grids (ACDCPPF) can be significantly decreased if the corresponding adjustment strategy of Voltage Source Converter (VSC) on the reactive power is not properly designed. To address this issue, a new strategy on the reactive power adjustment of VSC is proposed.
Sui Peng +3 more
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IEEE Transactions on Sustainable Energy, 2019
Renewable energy sources are a significant means of addressing dwindling conventional fuels and have been increasingly incorporated in transmission power grids on a large scale.
Cong Zhang +5 more
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Renewable energy sources are a significant means of addressing dwindling conventional fuels and have been increasingly incorporated in transmission power grids on a large scale.
Cong Zhang +5 more
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