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新能源电力系统国家重点实验室(华北电力大学),北京市 102206
任健淼(1998—),男,硕士研究生,主要研究方向:电力系统稳定性分析。E-mail:rjmiao9887@163.com
肖仕武(1974—),男,通信作者,副教授,硕士生导师,主要研究方向:电力系统稳定性分析、电力系统故障分析。E-mail:xsw@ncepu.edu.cn
收稿:2021-11-23,
修回:2022-07-25,
网络出版:2023-01-06,
纸质出版:2023-02-10
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任健淼,肖仕武.基于频域振荡模式的次/超同步分量可观可控分析[J].电力系统自动化,2023,47(3):30-39.
REN Jianmiao,XIAO Shiwu.Observability and Controllability Analysis of Sub-/Super-synchronous Components Based on Frequency Domain Oscillation Mode[J].Automation of Electric Power Systems,2023,47(3):30-39.
任健淼,肖仕武.基于频域振荡模式的次/超同步分量可观可控分析[J].电力系统自动化,2023,47(3):30-39. DOI: 10.7500/AEPS20211123009.
REN Jianmiao,XIAO Shiwu.Observability and Controllability Analysis of Sub-/Super-synchronous Components Based on Frequency Domain Oscillation Mode[J].Automation of Electric Power Systems,2023,47(3):30-39. DOI: 10.7500/AEPS20211123009.
直驱风电机组接入弱交流电网时会引发电力系统的次/超同步振荡,产生的超同步分量幅值一般不同于次同步分量,具体产生机理缺少清晰解释。文中基于频域正负序耦合阻抗回路的振荡模式,定量分析了次/超同步分量的可观可控度,解释了次/超同步分量的可观可控规律。首先,建立直驱风电机组并网系统的频域正负序回路耦合阻抗方程,分析了次/超同步分量与正负序分量、
dq
分量之间的关系,解释了次/超同步分量幅值不相等的成因。然后,从定量的角度推导了次/超同步振荡模式在正负序分量、次/超同步分量上的可观可控度表达式,实现了次/超同步分量可观可控分析。最后,应用灵敏度的方法分析了影响次/超同步分量大小的参数,并针对理论分析结果进行了仿真验证。
When direct-driven wind turbine is connected to a weak AC power grid
it will cause sub-/super-synchronous oscillation of the power system. The amplitude of the generated supersynchronous component is generally different from that of the subsynchronous component
and the specific generation mechanism is not clearly explained. In this paper
based on the oscillation mode of the positive and negative sequence coupling impedance loop in the frequency domain
the observability and controllability of the sub-/super-synchronous components are quantitatively analyzed
and the observability and controllability laws of the sub/super-synchronous components are explained. First
the positive and negative sequence loop coupling impedance equation of the grid connected with frequency-domain direct-driven wind turbine system is established
the relationship between the sub-/super-synchronous component
the positive and negative sequence component
and the
dq
component is analyzed
and the cause of the unequal amplitude of the sub-/super-synchronous component is explained. Then
the expression of the degree of observability and controllability of sub-/super-synchronous oscillation mode on positive and negative sequence components and sub-/super-synchronous components is derived from a quantitative perspective
and the analysis of the degree of observability and controllability of sub-/super-synchronous components is realized. Finally
the sensitivity method is used to analyze the parameters that affect the magnitude of sub-/super-synchronization components
and the simulation results are verified against the theoretical analysis results.
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