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首页> 外文会议>IEEE China International Youth Conference on Electrical Engineering >Frequency Coupling of Asymmetrical VSC-dominated Power Systems in Small-signal Dynamic Analysis
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Frequency Coupling of Asymmetrical VSC-dominated Power Systems in Small-signal Dynamic Analysis

机译：小信号动态分析中不对称VSC主导电力系统的频率耦合

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The frequency coupling has brought great challenges to the small-signal dynamic analysis of the VSC-dominated power systems. However, few have cognized the essence of the frequency coupling, especially its inner relationship with the asymmetry of the system. Thus, this paper will emphatically study the frequency coupling of the asymmetrical VSC-dominated power systems in the small-signal dynamic analysis. First, this paper will summarize the asymmetrical factors of VSC and the power network. Then, the effects of the system’s asymmetry on the frequency coupling will be analyzed. The results indicate that the asymmetry of VSC and the power network can induce the frequency coupling of the linearized VSC-dominated power systems. Moreover, the utilized coordinate for system modeling and analysis have great effects on the frequency coupling. Therefore, by choosing the appropriate coordinate according to the asymmetries of VSC and the power network, this system can also be modeled and analyzed with the linear time invariant (LTI) methods, rather than the complicated linear time periodic (LTP) methods. Eventually, the time domain simulations will verify the correctness of the analysis.
机译：频率耦合对VSC主导的电力系统的小信号动态分析带来了极大的挑战。然而，很少有人认识到频率耦合的本质，特别是与系统的不对称性的内部关系。因此，本文将重点研究了在小信号动态分析中的不对称VSC主导电力系统的频率耦合。首先，本文将总结VSC和电网的不对称因素。然后，将分析系统的不对称性对频率耦合的影响。结果表明VSC和电网的不对称性可以诱导线性化VSC主导的电力系统的频率耦合。此外，系统建模和分析的利用坐标对频率耦合具有很大的影响。因此，通过根据VSC的不对称和电力网络的不对称选择适当的坐标，也可以用线性时间不变（LTI）方法来建模和分析该系统，而不是复杂的线性时间周期（LTP）方法。最终，时域模拟将验证分析的正确性。

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