
1.浙江大学 工程师学院,浙江 杭州 310027
2.国网冀北电力有限公司电力科学研究院,北京 100045
3.浙江大学 电气工程学院,浙江 杭州 310027
尚若愚(1999 — ),男,硕士研究生,主要研究方向为新能源电力系统暂态电压安全问题(E-mail:22260124@zju.edu.cn);
辛焕海(1981 — ),男,教授,博士研究生导师,通信作者,主要研究方向为高比例新能源电力系统稳定性分析和控制(E-mail:xinhh@zju.edu.cn)。
收稿日期:2024-07-23,
修回日期:2025-03-10,
网络出版日期:2025-07-14,
纸质出版日期:2025-09-10
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尚若愚,谢欢,刘昕宇等.基于等效阻抗优化的跟网型变流器暂态过电压抑制方法[J].电力自动化设备,2025,45(09):128-134.
SHANG Ruoyu,XIE Huan,LIU Xinyu,et al.Transient overvoltage suppression method of grid-following converter based on equivalent impedance optimization[J].Electric Power Automation Equipment,2025,45(09):128-134.
尚若愚,谢欢,刘昕宇等.基于等效阻抗优化的跟网型变流器暂态过电压抑制方法[J].电力自动化设备,2025,45(09):128-134. DOI: 10.16081/j.epae.202507015.
SHANG Ruoyu,XIE Huan,LIU Xinyu,et al.Transient overvoltage suppression method of grid-following converter based on equivalent impedance optimization[J].Electric Power Automation Equipment,2025,45(09):128-134. DOI: 10.16081/j.epae.202507015.
新能源大规模接入电网加剧了交流电网故障恢复阶段的暂态过电压问题。针对电磁暂态时间尺度的暂态过电压问题,建立了跟网型变流器故障恢复期间暂态多过程等效模型。基于所提等效模型,揭示了系统暂态过电压发生机理。进一步地,通过分析内环控制参数对暂态过电压水平的影响规律提出了参数优化方案。在此基础上,由于优化参数可能加剧锁相环与内环的交互,造成小扰动同步失稳,根据二者的交互动态提出了参数优化边界,并结合变流器过流能力形成了基于内环等效阻抗优化的暂态过电压抑制流程。电磁暂态仿真结果表明,所提模型能较为准确地反映暂态过电压机理,所提方法能有效地抑制暂态过电压。
The large-scale access of renewable energy sources(RESs) to the power grid aggravates the transient overvoltage problem during the fault recovery period. Aiming at the overvoltage during the fault reco-very period on electromagnetic transient time scale,an equivalent transient multi-process model of grid-following converter is established. Based on the proposed model,the mechanism of transient overvoltage is revealed. Furthermore,by analyzing the influence of inner loop control parameters on transient overvoltage,a parameter optimization scheme is proposed. On this basis,due to the optimized parameters may aggravate the interaction between the phase-locked loop and the inner loop,resulting in small disturbance synchronous instability,the parameter optimization boundary is proposed according to their interaction dynamics,then a transient overvoltage suppression process is formed based on the optimization of equivalent model conside-ring the overcurrent capability of converter. The electromagnetic transient simulation results show that the proposed model can accurately reflect the transient overvoltage mechanism,and the proposed method can effectively suppress the transient overvoltage.
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