DOI:10.35833/MPCE.2020.000374 |
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An Optimal Over-frequency Generator Tripping Strategy for Regional Power Grid with High Penetration Level of Renewable Energy |
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Page view: 122
Net amount: 499 |
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Author:
Zhihang Zhou1,Libao Shi1,Yixuan Chen2
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Author Affiliation:
1.National Key Laboratory of Power Systems in Shenzhen, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;2.Planning Research Center of Yunnan Power Grid Co., Ltd., Kunming 650051, China
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Foundation: |
This work was supported in part by the National Natural Science Foundation of China (No. 51777103). |
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Abstract: |
This paper proposes an optimal over-frequency generator tripping strategy aiming at implementing the least amount of generator tripping for the regional power grid with high penetration level of wind/photovoltaic (PV), to handle the over-frequency problem in the sending-end power grid under large disturbances. A steady-state frequency abnormal index is defined to measure the degrees of generator over-tripping and under-tripping, and a transient frequency abnormal index is presented to assess the system abnormal frequency effect during the transient process, which reflects the frequency security margin during the generator tripping process. The scenario-based analysis method combined with the non-parametric kernel density estimation method is applied to model the uncertainty of the outgoing power caused by the stochastic fluctuations of wind/PV power and loads. Furthermore, an improved fireworks algorithm is utilized for the solution of the proposed optimization model. Finally, the simulations are performed on a real-sized regional power grid in Southern China to verify the effectiveness and adaptability of the proposed model and method. |
Keywords: |
Frequency response ; over-frequency generator tripping ; wind power ; photovoltaic (PV) ; fireworks algorithm |
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Received:June 14, 2020
Online Time:2021/09/28 |
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