Fault Characteristics Analysis and Line Protection Design Within a Large-Scale Photovoltaic Power Plant

Jia, Ke; Gu, Chenjie; Xuan, Zhenwen; Li, Lun; Lin, Yaoqi

doi:10.1109/tsg.2017.2648879

Cited by 79 publications

(54 citation statements)

References 26 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%

“…The adaptability problem of typical relay protection schemes to transmission lines emanating from PV power stations was briefly studied in [14]. The fault-current characteristics within a large PV power station were analyzed in [15], and a distance protection scheme was proposed to effectively isolate PV power station from faults in overhead transmission lines. In particular, PV power stations have some impact on traditional current protection and may lead to protection maloperation [16].…”

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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“…To verify the IIREG's short-circuit current model, both the calculation results based on Matlab and the test results based on the experimental rig are compared and analyzed. In addition, the calculation results are from the existing model (Jia et al, 2017) and the models used in this paper. Table 1 shows the comparison results with different active and reactive power commands.…”

Section: Verification For Steady-state Short-circuit Current Modelmentioning

confidence: 99%

“…The integration topology and generation principle of renewable energy generators are different from the ones of traditional synchronous generators (Yaramasu et al, 2015). It brings challenges to the existing protection system of electrical grids (He et al, 2012;Jia et al, 2017). To safely clear short circuit faults from the electric power system, the existing protection relays are usually designed based upon the fault characteristics of fundamental frequency currents.…”

Section: Introductionmentioning

confidence: 99%

“…However, these studies mentioned above cannot provide theoretical explanation for representing the IIREGs as the controlled current sources. Jia et al (2017) derived the formula for positive-and negative-sequence currents from the IIREGs during the steady-state period of a fault in consideration of the grid-tied inverters control (Rodriguez et al, 2007;Castilla et al, 2010;Miret et al, 2012). However, the grid-tied inverters' capacity constraint was not considered.…”

Section: Introductionmentioning

confidence: 99%

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Equivalent Model for Calculating Fault Current from Inverter-Interfaced Renewable Energy Generators

Liu¹,

Bi²,

Xue³

et al. 2018

J ENV INFORM

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With decarburization of the electrical grid, the penetration of renewable energy generators (REGs) is increasing. Consequently, the operating environment of the electrical grid is greatly altered and the existing protection system for the electrical grid cannot adapt to the new environment. In order to solve the existing protection problems, the equivalent model for calculating short-circuit current of the REGs should be built. The calculation model depends on the fault current characteristics of REGs that are different from the conventional generators (synchronous generators). The short-circuit current characteristics of REGs are related with the corresponding inverter control strategies. However, the strategies are diverse from manufacturer to manufacturer and are unknown to the public. As a result, it becomes difficult to reveal the fault current characteristics and realize fault current calculation without knowing the control strategies. In this paper, the focus is on the fault current characteristics and their calculation models of inverter-interfaced REGs (IIREGs). To reveal the relationship between the inverter's control strategies and the IIREG's short-circuit current characteristics, a coordinated control strategy for gird-tie inverter and DC-link chopper is proposed. The main factors affecting the transient and steady-state shortcircuit currents are analyzed and revealed for IIREGs. Further, the calculation model of the steady-state short-circuit current from IIREGs is established, which is independent of the specific inverter's control strategies. Finally, based on the experimental test bench, both the fault ride through (FRT) capability and short-circuit current model of IIREG are verified. The results can be used for assessing and improving the relay protection strategies of the electrical grid with lots of IIREGs.

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Directional Relay for Outlet Ground Faults Based on Zero Sequence Voltage Comparison

Jiang,

Wen,

Qian

et al. 2024

Green Energy and Technology

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Fault Characteristics Analysis and Line Protection Design Within a Large-Scale Photovoltaic Power Plant

Cited by 79 publications

References 26 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

Equivalent Model for Calculating Fault Current from Inverter-Interfaced Renewable Energy Generators

Directional Relay for Outlet Ground Faults Based on Zero Sequence Voltage Comparison

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