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1.南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市 211106
2.智能电网保护和运行控制国家重点实验室,江苏省南京市 211106
Received:15 June 2022,
Revised:2022-08-30,
Published Online:31 January 2023,
Published:10 March 2023
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薛峰,吴家龙,崔晓丹等.基于阻抗辨识的沽源地区风电并网系统次同步振荡控制策略[J].电力系统自动化,2023,47(5):200-207.
XUE Feng,WU Jialong,CUI Xiaodan,et al.Sub-synchronous Oscillation Control Strategy Based on Impedance Identification for Wind Power Grid-connected System in Guyuan Area of China[J].Automation of Electric Power Systems,2023,47(5):200-207.
薛峰,吴家龙,崔晓丹等.基于阻抗辨识的沽源地区风电并网系统次同步振荡控制策略[J].电力系统自动化,2023,47(5):200-207. DOI: 10.7500/AEPS20220615002.
XUE Feng,WU Jialong,CUI Xiaodan,et al.Sub-synchronous Oscillation Control Strategy Based on Impedance Identification for Wind Power Grid-connected System in Guyuan Area of China[J].Automation of Electric Power Systems,2023,47(5):200-207. DOI: 10.7500/AEPS20220615002.
大规模风电集群与系统交互作用引发的次同步振荡严重威胁电网运行安全。文中提出一种基于系统阻抗辨识的次同步振荡控制实现框架及计算方法。通过辨识电网侧和风场支路阻抗得到系统序阻抗,基于系统序阻抗实部值的变化来判定稳控系统切除不同风场馈线的有效性,考虑不同风场对系统阻抗的影响大小并基于最小切除量原则制定次同步振荡控制策略。针对实际电网中电网侧阻抗及风场支路阻抗难以辨识的难点,提出电网侧阻抗极限值预估和风场支路阻抗在线测量方法。基于PSCAD/EMTDC仿真平台构建沽源地区实际风场群并网系统模型,验证了所提次同步振荡控制策略的有效性。
Sub-synchronous oscillations caused by the interaction between large-scale wind power clusters and the power system seriously threaten the safety of power grid operation. This paper proposes an implementation framework and calculation method for sub-synchronous oscillation control based on system impedance identification. The system impedance is obtained by identifying the grid-side impedance and the impedance of wind farm branches. Based on the change of the real part of the system impedance
the effectiveness of the stability control system in cutting different wind farm branches is determined. Considering the influence of different wind farms on the system impedance
the control strategy for the sub-synchronous oscillation is formulated based on the principle of minimizing cut-off quantity. Aiming at the difficulty in identifying the grid-side impedance and the impedance of wind farm branches in the actual power grid
the methods for predicting the limit value of grid-side impedance and online measurement for the impedance of wind farm branches are proposed. Based on the PSCAD/EMTDC simulation platform
the actual power grid model in Guyuan area of China is constructed
which verifies the effectiveness of the proposed control strategy for sub-synchronous oscillation.
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