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Non-linear disturbance observer-based improved frequency and tie-line power control of modern interconnected power systems

机译：基于非线性干扰观测器的改进的现代互联电源系统频率和联络线功率控制

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摘要

This study presents the application of non-linear disturbance observer (NDO) for automatic generation control of interconnected thermal area power systems considering generation rate constraints. In this work, any change in electrical power arising in the system due to either load change or change in power output of intermittent renewable energy sources is called a disturbance. This disturbance is estimated using an NDO and the same is rejected by giving an equivalent command to the governor of thermal power units to maintain a power balance in the system; thereby maintaining frequency and tie-line power flows in each area of an interconnected power system. The analysis is presented on a two-area power system and it is shown that the proposed control scheme effectively mitigates any active power imbalance in the system not only for normal operations but also when there is large communication delay in the system. The key advantages of the proposed scheme not only include faster frequency and tie-line power control but also reduced control efforts as compared to other established control schemes. Furthermore, the proposed scheme requires the optimisation of only one control parameter in each area. Therefore, the scheme gives away the requirement of complex optimisation algorithms.
机译：这项研究提出了非线性干扰观测器（NDO）在考虑发电量约束的互连热区电力系统自动发电控制中的应用。在这项工作中，由于负载变化或间歇性可再生能源的输出功率变化而导致系统中出现的任何电功率变化都称为干扰。使用NDO可以估算这种干扰，并通过向火力发电装置的调节器发出等效命令以维持系统中的功率平衡来消除干扰。从而在互连的电源系统的每个区域中保持频率和联络线功率流。在两区域电力系统上进行了分析，结果表明，所提出的控制方案不仅有效地缓解了系统中任何有功功率的不平衡现象，而且还适用于系统中存在较大通信延迟的情况。与其他已建立的控制方案相比，该方案的主要优点不仅包括更快的频率和联络线功率控制，而且还减少了控制工作。此外，提出的方案要求在每个区域中仅优化一个控制参数。因此，该方案放弃了复杂的优化算法的要求。

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