Effects of VSC based HVDC system on distance protection of transmission lines

Alam, Mohammad Meraj; Leite, Hélder; Liang, Jun; Carvalho, Adriano

doi:10.1016/j.ijepes.2017.04.012

Cited by 31 publications

(17 citation statements)

References 23 publications

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“…Currently, some studies have investigated the effects of renewable energy power stations on distance protection [14][15][16][17][18][19][20][21][22][23][24][25][26]. However, these studies have not discussed fault component distance protection or considered the specific fault characteristics of PV power stations.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the characteristics of ∆Z are mainly determined by ∆θ MBC . According to Equations (4) and (18), ∆θ MBC values are affected by several factors, such as the control targets, active and reactive power commands, and voltage unbalance on the grid. Consider a phase-to-phase fault as an example.…”

Section: Characteristic Analysis Of ∆Z Under a Phase-to-phase Faultmentioning

confidence: 99%

“…In particular, PV power stations have some impact on traditional current protection and may lead to protection maloperation [16]. The effect of voltage source converter based high voltage direct current (VSC-HVDC) interconnectors on distance protection of transmission lines has also been analyzed in [17,18]. Additionally, a novel pilot protection principle was proposed in [17].…”

Section: Introductionmentioning

confidence: 99%

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Adaptability Analysis of Fault Component Distance Protection on Transmission Lines Connected to Photovoltaic Power Stations

Liang

Zha

et al. 2019

Energies

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Photovoltaic (PV) power stations tend to have a relatively weak infeed characteristic, unlike conventional synchronous generators. The limited overcurrent capability of power electronic devices and the controllability of grid-connected inverters mean that PV power stations will cause changes in the characteristics of faults on transmission lines. To analyze the adaptability of fault component distance protection on transmission lines connected to PV power stations, a unified phasor expression for the fault current of a PV power station side under various control strategies was deduced in this paper. This expression is then used to derive the equivalent impedance on the PV power station side and the additional impedance. The equivalent impedance and additional impedance are affected greatly by the active and reactive power commands, control targets, and fault conditions. These aspects of a PV power station may cause malfunctions, which can thereby reduce the reliability of fault component distance protection on transmission lines connected to PV power stations. A simulation model of a PV power station was established in PSCAD/EMTDC and the correctness of theoretical analysis was verified by the simulation results.

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Section: Discussionmentioning

confidence: 99%

Section: Characteristic Analysis Of ∆Z Under a Phase-to-phase Faultmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adaptability Analysis of Fault Component Distance Protection on Transmission Lines Connected to Photovoltaic Power Stations

Liang

Zha

et al. 2019

Energies

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“…For a grid balanced fault, both VSCs are controlled to inject 1 p.u. reactive current based on the control structure in [12].…”

Section: A Methodsmentioning

confidence: 99%

Synchronous Condenser Allocation for Improving System Short Circuit Ratio

Jia

Yang

Nielsen

et al. 2018

2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)

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Abstract-With converter-based renewable energy sources increasingly integrated into power systems and conventional power plants gradually phased out, future power systems will experience reduced short circuit strength. The deployment of synchronous condensers can serve as a potential solution. This paper presents an optimal synchronous condenser allocation method for improving system short circuit ratio at converter point of common coupling using a modified short circuit analysis approach. The total cost of installing new synchronous condensers is minimized while the system short circuit ratios are maintained above a certain level. The presented method is implemented on the simplified western Danish power system for a future scenario.

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“…Some studies have analyzed the impact that renewable energies based on PE may cause in traditional protection system behavior from a theoretical point of view and using traditional simulation analysis [6][7][8][9][10]. Focusing on distance protection in high PE penetration systems, [11][12][13][14][15][16] show different adaptive settings approaches but they are only focused on solving under-reach or over-reach problems associated to renewable generation and does not take into account missed trips due to directional or phase selection errors.…”

Section: Introductionmentioning

confidence: 99%

Improved Faulted Phase Selection Algorithm for Distance Protection under High Penetration of Renewable Energies

et al. 2020

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The high penetration of renewable energies will affect the performance of present protection algorithms due to fault current injection from generators based on power electronics. This paper explains the process followed for analyzing this effect on distance protection and the development of a new algorithm that improves its performance in such a scenario. First of all, four commercial protection relays were tested before fault current contribution from photovoltaic system and full converter wind turbines using the hardware in the loop technique. The analysis of results obtained, jointly with a theoretical analysis based on commonly used protection strategy of superimposed quantities, lead to a conclusion about the cause of observed wrong behaviors of present protection algorithms under a high penetration of renewables. According to these conclusions, a new algorithm has been developed to improve the detection of faulted phase selection and directionality on distance protection under a short circuit current fed by renewable energy sources.

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Effects of VSC based HVDC system on distance protection of transmission lines

Cited by 31 publications

References 23 publications

Adaptability Analysis of Fault Component Distance Protection on Transmission Lines Connected to Photovoltaic Power Stations

Adaptability Analysis of Fault Component Distance Protection on Transmission Lines Connected to Photovoltaic Power Stations

Synchronous Condenser Allocation for Improving System Short Circuit Ratio

Improved Faulted Phase Selection Algorithm for Distance Protection under High Penetration of Renewable Energies

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