非线性PID控制器在超导磁储能装置中的应用研究

RESEARCH ON APPLICATION OF NONLINEAR PID CONTROLLER IN SUPERCONDUCTING MAGNETIC ENERGY STORAGE

非线性比例–积分–微分(Nonlinear Proportion-Integral-Differential,NLPID)控制是一种利用非线性跟踪–微分器和非线性组合方法对线性 PID控制进行改进的新型控制策略,它具有不依赖于被控系统模型的特点。作者设计了用于电力系统超导磁储能(Superconducting Magnetic EnergyStorage,SMES)装置的 NLPID 控制器,该控制器通过对由跟踪-微分器提取的转子角速度和机端电压的偏差及其微分和积分信号分别进行适当非线性组合,产生用于协调控制SMES 和系统之间的有功和无功功率交换的控制信号。仿真结果表明该 NLPID控制器具有较好的适应性和鲁棒性,且改善了系统的阻尼特性,提高了系统电压的稳定性。

Nonlinear Proportion-Integral-Differential (NLPID) control is a new type of control strategy, in which the non-linear tracking-differentiator and non-linear configuration are used to improve the performance of linear PID control, and it possesses the feature of not depending on the model of the controlled system. The authors designed an NLPID control for power system superconducting magnetic energy storage (SMES), by means of deviations of rotor angular speed and generator terminal voltage extracted by tracking- differentiator and their differential and integral signals the non-linear configuration was appropriately carried out and the control signals to coordinately control the active and reactive power exchange between SMES and system were generated. Simulation results show that the proposed NLPID controller possesses better adaptability and robustness, the damping characteristic of the system and stability of system voltage are improved.