基于传递函数法的LCC-HVDC控制系统等效阻抗建模

2023 6th International Conference on Energy, Electrical and Power Engineering (CEEPE) Pub Date : 2023-05-12 DOI:10.1109/CEEPE58418.2023.10167062

Yinsheng Su, Runbin Cao, Qingming Xin, H. Xie, Hongtao Liu, Wei-huang Huang

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引用次数: 0

摘要

针对基于线路换向变换器的高压直流输电(lc - hvdc)系统的直流侧谐振问题，考虑到直流控制系统的影响，提出了一种基于传递函数的控制系统阻抗建模方法。该阻抗模型可用于分析恒流控制器、恒压控制器和恒消角控制器在不同频率下的阻尼效果。最后，将该方法应用于兴安LCC-HVDC工程。结果证实了整流侧恒流控制在特定频率附近存在谐振风险，验证了所提建模方法对直流控制谐振风险评估的有效性。分析了不同测量延时和滤波对阻抗的影响，为lc - hvdc控制系统的设计和验证提供了理论依据。

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Equivalent Impedance Modeling of LCC-HVDC Control System Based on Transfer Function Method

Aiming at the dc side resonance problem of line commutated converter based high-voltage dc transmission (LCC-HVDC) system, considering the effect of DC control system, an impedance modeling method of control system based on transfer function is proposed. The impedance model can be used to analyze the damping effects of constant current controller, constant voltage controller and constant extinction angle controller at different frequencies. Finally, the proposed method is applied to Xing 'an LCC-HVDC project. The results confirm that the constant current control at the rectifier side has resonance risk near a specific frequency, which verifies the effectiveness of the proposed modeling method for the assessment of DC control resonance risk. The influence of different measurement delay and filtering on impedance is analyzed, which can be used for the design and verification of LCC-HVDC control system.

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来源期刊

2023 6th International Conference on Energy, Electrical and Power Engineering (CEEPE)

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