高压直流换流站分散鲁棒自适应控制器的设计

针对高压直流输电系统（HVDC），提出了一种换流站的分散鲁棒自适应控制器的设计方法，设计中引入自适应非线性阻尼项来抑制系统非线性不确定参数和未知有界干扰的影响，同时采用反演设计方法来克服控制器设计的复杂性，最后获得高压直流输电系统换流站的分散鲁棒自适应控制策略的一般表达式，并提供了整个系统的稳定性证明，所得控制器仅利用本地测量量实现，控制策略具有分散性和适应性，通过NETOMAC数字仿真，仿真结果证明该控制器比常规的PI控制器具有更好的控制效果。

DESIGN OF DECENTRALIZED ROBUST ADAPTIVE CONTROLLERS FOR HVDC CONVERTERS

Based on HVDC transmission system, this paper presents a design approach to decentralized robust adaptive controllers for converters. Utilizing Backstepping procedure, general expression of control strategy for HVDC converters is acquired. The control strategy can restrain the nonlinear uncertainty through injection of adaptive nonlinear damping terms in controllers. The proposed decentralized adaptive control scheme guarantees that all the signals in the closed loop system are bounded in the presence of high order interconnections and bounded disturbances. The controllers only use local measurements, which makes them practicable. Moreover, the control law is independent of transmission network parameters. Simulation results acquired by using NETOMAC software show that the controllers have better performance than the traditional PI controllers and can improve the stability of HVDC transmission system.