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PSO based LQR-PID output feedback for load frequency control of reduced power system model using balanced truncation
International Transactions on Electrical Energy Systems ( IF 2.3 ) Pub Date : 2021-07-12 , DOI: 10.1002/2050-7038.13012
Anju G. Pillai 1 , Elizabeth Rita Samuel 1
Affiliation  

Hydro power plants are in general more stable to the load demands and thus the change in frequency can be easily controlled. Whereas in multi-source interconnected power system the stability of the system is marginal. In certain conditions the system is also unmeasurable to implement the load frequency control. Linear Quadratic Regulator with output feedback design forms a familiar optimal choice to tackle this problem, but the technique is dependent on the choice of the weighting matrices Q and R for the performance index. Particle swarm optimization technique is commonly used in power system applications for obtaining the weighting matrices. In this paper, an output feedback-based LQR-PID technique is used to obtain an improved response for the multisource systems. Due to integral action, the steady-state value achieved for the change in frequency is minimized. In addition, if the system is unmeasurable LQR technique cannot be applied, in the literature, Linear Quadratic Gaussian is used for the same. Here a balanced truncation model order reduction is used on the original system to convert it to a measurable system. In addition, a comparative analysis is included to highlight the efficacy of the proposed control technique.

中文翻译:

基于 PSO 的 LQR-PID 输出反馈用于使用平衡截断的缩减电力系统模型的负载频率控制

水力发电厂通常对负载需求更稳定,因此可以轻松控制频率的变化。而在多源互联电力系统中,系统的稳定性是微不足道的。在某些情况下,系统也无法实现负载频率控制。具有输出反馈设计的线性二次稳压器形成了解决此问题的常见最佳选择,但该技术取决于加权矩阵QR 的选择为性能指标。粒子群优化技术通常用于电力系统应用中以获得加权矩阵。在本文中,基于输出反馈的 LQR-PID 技术用于获得多源系统的改进响应。由于积分作用,频率变化所达到的稳态值被最小化。此外,如果系统不可测,LQR 技术无法应用,在文献中,线性二次高斯用于相同。这里在原始系统上使用平衡截断模型降阶以将其转换为可测量系统。此外,还包括比较分析,以突出所提出的控制技术的功效。
更新日期:2021-09-16
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