多机电力系统非线性自适应L2增益分散励磁控制  

Nonlinear Adaptive L2-Gain Decentralized Excitation Control for Multi-Machine Power System

作　　者：谷志锋 孙晓云 余志强 朱长青[2] GU Zhifeng;SUN Xiaoyun;YU Zhiqiang;ZHU Changqing(School of Electrical and Electrics Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050034,Hebei Province,China;Vehicles and Electrical Engineering Department,Ordnance Engineering College,Shijiazhuang 050003,Hebei Province,China)

机构地区：[1]石家庄铁道大学电气与电子工程学院,河北省石家庄市050034 [2]军械工程学院车辆与电气工程系,河北省石家庄市050003

出　　处：《电网技术》2018年第10期3355-3360,共6页Power System Technology

基　　金：国家自然科学基金资助项目(51407196);河北省自然科学基金资助项目(E2017506007)~~

摘　　要：为提高多机电力系统电压稳定恢复能力;克服外部干扰及模型不确定性对励磁控制的影响,提出了一种新的非线性自适应L2增益分散励磁控制方法,解决了由非仿射模型结构、参数不确定及外部扰动所造成的多机励磁系统分散稳定控制困难的问题,且在反演设计过程中不需要多次考虑耗散不等式,给出的控制律不包含变量微分项,更便于工程实际应用。最后利用Matlab/Simulink进行了仿真验证,并与常规AVR＋PSS控制进行了对比。仿真结果表明新的控制方法可以加快电力系统电压稳定速度,提高强励能力,降低不同区域间联络线功率波动,有效抑制参数不确定和外部干扰的影响。新方法更有利于提高电力系统暂态稳定控制能力。For improving voltage stability of multi-machine power system and reducing influence of uncertain parameters and interference in the model on excitation control, a new nonlinear adaptive L2-gain decentralized excitation control（NADEC-L2） method is proposed. With the new NADEC-L2 method, difficulties in decentralized stabilization control of multi-machine excitation system, caused by non-affine mathematical model, the uncertain parameters and external disturbance, are resolved. Meanwhile, dissipation inequality need not to be considered in every back-stepping design steps and the differential values of state parameters are not included in control law, therefore it is convenient to engineering application. Finally, simulation comparison between traditional AVR＋PSS and NADEC-L2 is carried out in Matlab/Simulink. Results show that, with the new control method, steady recovery speed of power system voltage is accelerated, amplitude of excitation control input is improved, fluctuation of tie-line power between different areas is decreased, influence of the uncertain parameters and outer disturbances is restrained, and dynamic stability of power system is thus improved.

关 键 词：电力系统稳定 分散励磁控制 L2增益励磁控制 非线性L2增益控制 自适应L2增益控制 

分 类 号：TM721[电气工程—电力系统及自动化]