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机构地区:[1]华侨大学信息科学与工程学院,福建厦门361021
出 处:《华侨大学学报(自然科学版)》2014年第2期121-126,共6页Journal of Huaqiao University(Natural Science)
基 金:福建省自然科学基金资助项目(2013J01198);福建省泉州市科技计划项目(2013Z32)
摘 要:为了有效改善多区域互联电网的动态稳定性,提出一种分散式模糊PID负荷频率控制方法.该方法为互联电网每个区域设计一个模糊PID控制器,以区域频率偏差和联络线功率偏差为控制目标,根据区域控制偏差的变化量,运用模糊推理,在线修正PID调节参数,从而控制互联电网快速趋于动态稳定.针对三区域环型互联电网,考虑发电速率的限制,对其负荷扰动和模型参数摄动进行仿真.结果表明:与传统PID算法相比较,所提出的方法具有更强的适应性、鲁棒性及扰动抑制能力,能使系统取得更好的动态控制性能.In order to effectively improve the dynamic stability of multi-area interconnected power grids, a load frequency control method based on decentralized fuzzy-PID algorithm is proposed in this paper. In this method, a fuzzy-PID control- ler is designed in each area of interconnected power grids. The control system takes the errors of the area frequency and tie-line power as control objectives. According to the variation of area control error, the PID regulating parameters are re- vised online by using fuzzy reasoning. And this method can make the interconnected power grid achieve dynamic stability quickly. Aiming at the three-area ring interconnected power grid, when considering generation rate limiting, load disturb- ance and model parameter perturbation are simulated. Simulation results show that the proposed method has stronger a- daptability, robustness and disturbance rejection ability. And can make the system obtain better dynamic control perform- ance in contrast with the traditional PID method.
关 键 词:互联电网 多区域 模糊PID控制 负荷频率 分散控制 动态稳定性
分 类 号:TM76[电气工程—电力系统及自动化]
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