Design of Reduced Order LADRC via Model Order Reduction Technique for Load Frequency Control in A Single-Area Power System

Safiullah, Y. V. Hote
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Abstract

The performance of a higher-order power system deteriorates due to the sudden load variations, structural discrepancy, and uncertainties involved in the parameters. Thus, an effective control technique must be employed to resolve the load frequency control (LFC) related issues in such systems. For the performance analysis of a higher-order system, a reduced-order controller is used for its reduced-order model because the full-order controller meets some structural and computational complexities. This paper proposes a reduced order linear active disturbance rejection control (RDLADRC) technique to deal with the LFC issues in a single-area power system. This technique successfully combines the benefits of the model order reduction (MOR) scheme and LADRC. Merits of the proposed approach are highlighted based on a deep comparative analysis of the reduced-order LADRC (RDLADRC) technique with full-order linear active disturbance rejection control (LADRC) and pre-existing two degree of freedom-internal model control (TDF-IMC) technique. The robustness of the proposed controller is investigated via system responses under parametric variations. MATLAB and simulation results confirm the effectiveness of the proposed scheme.
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基于模型降阶技术的单区电力系统负荷频率控制降阶LADRC设计
由于负载的突然变化、结构差异和参数的不确定性,高阶电力系统的性能会下降。因此,必须采用有效的控制技术来解决这类系统的负荷频率控制(LFC)相关问题。对于高阶系统的性能分析,由于全阶控制器具有一定的结构和计算复杂性,因此对其降阶模型采用降阶控制器。针对单区域电力系统中的LFC问题,提出了一种降阶线性自抗扰控制(RDLADRC)技术。该技术成功地结合了模型降阶(MOR)方案和LADRC方案的优点。通过对降阶LADRC (RDLADRC)技术与全阶线性自抗扰控制(LADRC)和已有的二自由度内模控制(TDF-IMC)技术的深入对比分析,突出了该方法的优点。通过参数变化下的系统响应研究了所提控制器的鲁棒性。MATLAB和仿真结果验证了该方案的有效性。
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