(1+PD)-PID cascade controller design for performance betterment of load frequency control in diverse electric power systems
(1+PD)-PID cascade controller design for performance betterment of load frequency control in diverse electric power systems
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DOI：
10.1007/s00521-021-06168-3
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发表时间：
2021-06-12
影响因子：
6
通讯作者：
Ocak, Cemil
中科院分区：
文献类型：
--
作者：
Celik, Emre;Ozturk, Nihat;Ocak, Cemil
在当今世界飞速发展的今天，负载频率控制(LFC)是通过提供良好的电力质量来提高一个国家的生活水平不可或缺的重要因素。为此，LFC领域取得了快速而显著的发展。然而，考虑到实际应用中的局限性和困难，世界各地的研究人员不仅需要有效的控制算法，而且需要计算量小的控制算法。因此，本文将(1+PD)-PID串级控制器引入到相关领域。该控制器实现简单，将1+PD控制器的输出与PID控制器的输入连接起来，并将频率和联络线功率偏差作为反馈信号加到后者上，这在文献中尚属首次尝试。为了发现最乐观的结果，控制器的增益被蜻蜓搜索算法(DSA)同时调整。为了验证该方法的有效性，将具有和不具有调速器死区非线性的两个区域热力系统作为初始测试系统。在此基础上，采用有/无直流输电线路的单/多区域多电源系统进行验证。结果表明，DSA优化的(1+PD)-PID型串级控制策略具有较小的目标函数值和阶跃负载扰动后的频率和联络线功率偏差的调整时间/欠调/过冲，具有较好的性能。
In our world of today developing incredibly fast, load frequency control (LFC) is an indispensable and vital element in increasing the standard of living of a country by providing a good quality of electric power. To this end, rapid and notable development has been recorded in LFC area. However, researchers worldwide need for the existence of not only effective but also computationally inexpensive control algorithm considering the limitations and difficulties in practice. Hence, this paper deals with the introduction of (1 + PD)-PID cascade controller to the relevant field. The controller is simple to implement and it connects the output of 1 + PD controller with the input of PID controller where the frequency and tie-line power deviation are applied to the latter controller as feedback signals also, which is the first attempt made in the literature. To discover the most optimistic results, controller gains are tuned concurrently by dragonfly search algorithm (DSA). For the certification purpose of the advocated approach, two-area thermal system with/without governor dead band nonlinearity is considered as test systems initially. Then single/multi-area multi-source power systems with/without a HVDC link are employed for the enriched validation purpose. The results of our proposal are analyzed in comparison with those of other prevalent works, which unveil that despite its simplicity, DSA optimized (1 + PD)-PID cascade strategy delivers better performance than others in terms of smaller values of the chosen objective function and settling time/undershoot/overshoot of the frequency and tie-line power deviations following a step load perturbation.