Adaptive Reclosing Scheme for Wind Power Outgoing Line Using Partial-phase Reclosing

doi:10.12204/j.issn.1000-7229.2023.05.010

Abstract

Abstract:

Wind turbines are vulnerable to the negative sequence current injection. Therefore, a three-phase reclosing scheme is generally utilized in the outgoing lines when there is more than one outgoing line for the wind farm(s). When the shunt reactors are not installed, it is difficult to identify the transient fault from the permanent one because of the absence of the coupling loop after a three-phase trip of the outgoing line. To solve the abovementioned problems, a novel adaptive reclosing scheme for wind power outgoing line is proposed in this study. Specifically, a single-terminal partial tripping method is proposed for multiple types of outgoing line faults; simultaneously, phase-to-phase coupling loops are established by the tripping. Based on the capacitor coupling characteristics, the transient fault is rapidly and accurately identified from the permanent one by the voltage magnitude criterion. The theoretical derivation and simulation experiments based on the PSCAD/EMTDC platform demonstrate that the proposed adaptive reclosing scheme can avoid the injection of negative sequence currents into wind turbines, while significantly improving the reclosing success rate of wind power outgoing lines and ensuring the power transmission continuity of the wind farm(s).

Key words: wind power outgoing line, adaptive reclosing, permanent fault, transient fault

CLC Number:

TM773

LI Hao, XIE Chao, ZHOU Weiji, LI Fengting, YIN Chunya. Adaptive Reclosing Scheme for Wind Power Outgoing Line Using Partial-phase Reclosing[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(5): 94-107.

Figures/Tables 29

Fig.1 Schematic diagram of the wind power outgoing line

Table 1 The partial reclosing strategy for system side in different faults

Fig.2 Equivalent circuit for no-fault situation after phases B and C reclosing of the system side

Fig.3 Equivalent circuit for fault situation after phases B and C reclosing of the system side

Fig.4 Equivalent circuit for no-fault situation after phase C reclosing of the system side

Fig.5 Equivalent circuit for fault situation after phase C reclosing of the system side

Fig.6 Flow chart of adaptive reclosing scheme for wind power outgoing line

Fig.7 Geographic sketch map of wind power outgoing line between Shisanjianfang and Tianguang substation

Table 2 Transmission line parameters

Fig.8 Root mean square of fault phase voltage fundamental component in transient single-phase to ground fault

Fig.9 Root mean square of fault phase voltage fundamental component in permanent single-phase to ground fault

Table 3 Single-phase to ground fault simulation results

Fig.10 Root mean square of voltage fundamental component’s difference between fault phase and reclosing phase in transient phase-to-phase fault

Fig.11 Root mean square of voltage fundamental component’s difference between fault phase and reclosing phase in permanent phase-to-phase fault

Table 4 Phase-to-phase to ground fault simulation results

Fig.12 Voltage and current waveform of the line for wind farm side in single-phase to ground fault

Fig.13 Voltage and current waveform of the line for wind farm side in phase-to-phase fault

Fig.A1 Root mean square of fault phase voltage fundamental component in transient phase-to-phase to ground fault

Fig.A2 Root mean square of fault phase voltage fundamental component in permanent phase-to-phase to ground fault

Fig.A3 Root mean square of voltage fundamental component’s difference between fault phase and reclosing phase in transient three-phase short circuit fault

Fig.A4 Root mean square of voltage fundamental component’s difference between fault phase and reclosing phase in permanent three-phase short circuit fault

Fig.B1 Voltage waveform of the line for wind farm side in single-phase to ground fault

Fig.B2 Current waveform of the line for wind farm side in single-phase to ground fault

Fig.B3 Voltage waveform of the line for wind farm side in phase-to-phase to ground fault

Fig.B4 Current waveform of the line for wind farm side in phase-to-phase to ground fault

Fig.B5 Voltage waveform of the line for wind farm side in phase-to-phase fault

Fig.B6 Current waveform of the line for wind farm side in phase-to-phase fault

Fig.B7 Voltage waveform of the line for wind farm side in three-phase short circuit fault

Fig.B8 Current waveform of the line for wind farm side in three-phase short circuit fault

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