Distance Protection of Lines Emanating From Full-Scale Converter-Interfaced Renewable Energy Power Plants—Part I: Problem Statement

Hooshyar, Ali; Azzouz, Maher A.; El-Saadany, Ehab F.

doi:10.1109/tpwrd.2014.2369479

Cited by 153 publications

(81 citation statements)

References 18 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%

“…Furthermore, the changes of modular multilevel converter based HVDC (MMC-HVDC) operation mode cause the scope of higher line distance relay Zone 2 to be narrowed, considerably increasing the probability of incorrect operation of distance protection [19]. The influence of full-scale converter-interfaced renewable energy power plants (CIREPPs) on distance relays installed on transmission lines connected to CIREPPs has been investigated in [20], and another novel protection scheme was proposed in [21]. The impact of the several control strategies and the combined impact of a voltage source converter (VSC) with a synchronous condenser on distance protection has been evaluated in [22].…”

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: Introductionmentioning

confidence: 99%

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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“…Assuming that impedance angles of Z Σm0 and Z Σn0 are equal, I m0 is in phase withİ n0 , and in this caseİ Af+ andİ Af´(İAn´) are also in phase withİ n0 according to Equations (11) and (12).…”

Section: Applicability Analysis Of R1 and R2mentioning

confidence: 99%

The Applicability of Traditional Protection Methods to Lines Emanating from VSC-HVDC Interconnectors and a Novel Protection Principle

et al. 2016

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Abstract:Voltage source converter (VSC)-based high voltage direct current (VSC-HVDC) interconnectors can realize accurate and fast control of power transmission among AC networks, and provide emergency power support for AC networks. VSC-HVDC interconnectors bring exclusive fault characteristics to AC networks, thus influencing the performance of traditional protections. Since fault characteristics are related to the control schemes of interconnectors, a fault ride-through (FRT) strategy which is applicable to the interconnector operating characteristic of working in four quadrants and capable of eliminating negative-sequence currents under unbalanced fault conditions is proposed first. Then, the additional terms of measured impedances of distance relays caused by fault resistances are derived using a symmetrical component method. Theoretical analysis shows the output currents of interconnectors are controllable after faults, which may cause malfunctions in distance protections installed on lines emanating from interconnectors under the effect of fault resistances. Pilot protection is also inapplicable to lines emanating from interconnectors. Furthermore, a novel pilot protection principle based on the ratio between phase currents and the ratio between negative-sequence currents flowing through both sides is proposed for lines emanating from the interconnectors whose control scheme aims at eliminating negative-sequence currents. The validity of theoretical analysis and the protection principle is verified by PSCAD/EMTDC simulations.

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“…The authors of [5,6] analyze the impact of renewable energy on distance protection. In [12], based on the characteristics of transient current waveforms of synchronous generators and various new energy sources, a new principle of longitudinal protection, based on waveform correlation, is proposed. The authors of [13] analyzed the mechanism of influence of inverter-type new energy on the current and phase components of the fault.…”

Section: Introductionmentioning

confidence: 99%

LS-Solar-PV System Impact on Line Protection

et al. 2019

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Large-scale photovoltaic power station access to the grid will profoundly change the fault current characteristics of the power station’s outgoing lines. This change results in adaptive problems in traditional protection phase selection components, which may cause incorrect actions in reclosing, protection ranging, and distance protection. Based on the fault current characteristics of the large-scale photovoltaic power station transmission line, this paper analyzes the adaptability of the phase current difference mutation and the sequence component phase selection component in protecting the Photovoltaic (PV) power plant side of the transmission line. Based on the fault current analytical formula, the phase relationship between the phase current difference and the current sequence component under different control targets, such as suppressing negative sequence current, suppressing the active power fluctuation, and suppressing the reactive power fluctuation, is derived. The operational performances of the phase–phase current difference of the abrupt phase selection component and the sequence component phase selection component of the power station side are degraded, which may cause incorrect operation of the phase selection component. Based on the actual engineering parameters of a PV power plant, a simulation model was built in Power System Computer Aided Design (PSCAD) to verify the correctness of the theoretical analysis.

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Distance Protection of Lines Emanating From Full-Scale Converter-Interfaced Renewable Energy Power Plants—Part I: Problem Statement

Cited by 153 publications

References 18 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

The Applicability of Traditional Protection Methods to Lines Emanating from VSC-HVDC Interconnectors and a Novel Protection Principle

LS-Solar-PV System Impact on Line Protection

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