王龙飞,杨滢,赵乐冰,马富艺龙,高晖胜
WANG Longfei,YANG Ying,ZHAO Lebing,MA Fuyilong,GAO Huisheng

• 1:国网浙江省电力有限公司电力科学研究院
• 2:浙江大学电气工程学院

摘要(Abstract)：

构网型柔直受端换流站采用模拟同步机的直流电压自同步控制策略，易影响受端系统的低频振荡特性。为此，提出一种基于等效阻尼转矩的系统低频振荡特性分析方法，分析构网型柔直控制参数对受端系统低频振荡的影响。首先，依据构网型柔直控制策略构造虚拟转子，推导了等效阻尼转矩模型；其次，基于各阻尼转矩分量的频率响应曲线，分析了自同步控制环与电压控制环等参数对等效阻尼转矩的影响。最后，基于MATLAB/Simulink进行了时域仿真验证，结果表明，增加等效阻尼系数、电压控制增益等措施有利于提升等效阻尼转矩分量，对受端交流系统低频振荡具有改善作用。
The receiving-end converter station of a grid-forming VSC-HVDC system adopts a DC-voltage selfsynchronizing control strategy that emulates the behavior of a synchronous generator, which may affect the lowfrequency oscillatory characteristics of the receiving-end AC system. To address this issue, this paper proposes an analysis method based on equivalent damping torque to investigate how grid-forming control parameters influence system oscillatory behavior. First, a virtual rotor equation is established according to the grid-forming(GFM) control strategy, and an equivalent damping torque model is derived. Second, by examining the frequency-response curves of the damping torque components, the influence mechanisms of parameters in the self-synchronizing loop and the voltage-control loop on the equivalent damping torque are revealed. Finally, time-domain simulations are performed in MATLAB/Simulink for validation. The results show that appropriately increasing the equivalent damping coefficient and the voltage-control gain enhances the equivalent damping torque components, thereby effectively suppressing low-frequency oscillations in the receiving-end AC system.

关键词(KeyWords)： 直流电压自同步控制;柔性直流;低频振荡;阻尼转矩法;构网型控制
DC-voltage self-synchronizing control;VSC-HVDC;low-frequency oscillation;damping torque analysis;grid-forming(GFM) control

Abstract:

Keywords:

基金项目(Foundation): 浙江省自然科学基金（LY24E070003）;; 国网浙江省电力有限公司科技项目（B311DS240015）

作者(Author): 王龙飞,杨滢,赵乐冰,马富艺龙,高晖胜
WANG Longfei,YANG Ying,ZHAO Lebing,MA Fuyilong,GAO Huisheng

DOI: 10.19585/j.zjdl.202602001

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