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首页> 外文期刊>Indian Journal of Science and Technology >Mathematical Modeling of the Squirrel Cage Induction Generator based Wind Farm for Sub-Synchronous Resonance Analysis
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Mathematical Modeling of the Squirrel Cage Induction Generator based Wind Farm for Sub-Synchronous Resonance Analysis

机译：基于鼠笼式感应发电机的风电场数学模型的亚同步共振分析

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Background/Objectives: To analyze the SSR phenomenon in a Squirrel Cage Induction Generator based Wind farm connected to series compensated transmission line at varying operating conditions. Methods/Statistical Analysis: There is a remarkable rise in the renewable energy sector in the current energy demand scenario, but their grid integration leads to various power system stability issues. In the case of wind power, wind farms being located far away from the grid, the integration of large scale wind farms to the utility grid requires high transmission line capacity to transport huge amount of wind power. In order to provide the power transfer capability and to improve the system stability, series compensation is the effective solution. But the series compensation may cause SSR oscillations in the system. Eigen value analysis is the method chosen to perform the Small Signal Stability analysis which examines the potential of SSR in the study system. Findings: The study investigates on the application of series capacitor for series compensation which is required during the grid integration. Series compensation of transmission line causes electro-mechanical oscillations at a sub-synchronous frequency which may finally result in serious damages in the system such as shaft failure. In order to perform the Eigen value analysis, detailed mathematical modeling of the system is developed. The pitch angle control is not taken into account while developing the system, whereas the strength of the transmission line is considered. The interconnection of three sub systems provides the complete model of the study system. The identification of system modes and damping of torsional and network modes are analyzed for various wind speed levels, various series compensation levels and various grid impedance levels. It has been observed that different grid impedance levels have a significant effect on the torsional mode oscillations of the system. Application/Improvements: As the overall system model is linearised, optimal control techniques can be developed as an application to mitigate the SSR oscillations and thereby improve the system stability.
机译：背景/目的：分析基于松鼠笼式感应发电机的风力发电场的SSR现象，该风力发电场在变化的工作条件下连接至串联补偿传输线。方法/统计分析：在当前的能源需求情景中，可再生能源行业出现了显着增长，但是它们的电网整合导致各种电力系统稳定性问题。在风力发电的情况下，风力发电场位于远离电网的地方，大型风力发电场与公用电网的整合需要高传输线容量来运输大量的风力发电。为了提供功率传输能力并提高系统稳定性，串联补偿是有效的解决方案。但是串联补偿可能会引起系统中的SSR振荡。特征值分析是用于执行小信号稳定性分析的方法，该方法检查了研究系统中SSR的潜力。调查结果：该研究调查了串联电容器在电网集成过程中所需的串联补偿应用。传输线的串联补偿会引起亚同步频率的机电振荡，最终可能导致系统严重损坏，例如轴故障。为了进行特征值分析，开发了系统的详细数学模型。在开发系统时不会考虑俯仰角控制，而会考虑传输线的强度。三个子系统的互连提供了学习系统的完整模型。针对各种风速水平，各种串联补偿水平和各种电网阻抗水平，分析了系统模式的识别以及扭转和网络模式的阻尼。已经观察到，不同的电网阻抗水平对系统的扭转模式振荡具有显着影响。应用/改进：随着整个系统模型的线性化，可以开发最佳控制技术来减轻SSR振荡，从而提高系统稳定性。

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