A fault calculation method for large-scale photovoltaic integrated transmission systems
The fault calculation method has not yet been generalized for the transmission system of large-scale new energy resource integration due to the multivariable coupling and nonlinear characteristics present during faults. To address this issue, this paper proposes a fault calculation method specifical...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-04-01
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| Series: | International Journal of Electrical Power & Energy Systems |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061525000559 |
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| Summary: | The fault calculation method has not yet been generalized for the transmission system of large-scale new energy resource integration due to the multivariable coupling and nonlinear characteristics present during faults. To address this issue, this paper proposes a fault calculation method specifically designed for large-scale photovoltaic (PV) integrated transmission systems. Firstly, the coupling relationship between the control loop of inverter-based resources (IBRs) and their currents is analyzed, leading to the establishment of an equivalent model of the controlled current source of the IBR. Subsequently, the positive sequence equivalent principle for the large-scale PV transmission system is customized based on the symmetrical component method and is integrated with the composite sequence network under various fault conditions. More importantly, a time-/phasor-domain alternating calculation method is developed, which effectively addresses the nonlinear control loops while simultaneously reducing the complexity of fault calculations in multi-IBR systems. Finally, a comparison between simulation and calculation results demonstrates that the proposed method can effectively and accurately calculate various asymmetric faults in multi-IBR systems. |
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| ISSN: | 0142-0615 |