基于等效解耦过程的交直流协调控制鲁棒稳定性研究  

Research on Coordinated Control Robust Stability Index of HVDC and PSS Supplementary Damping Control Based on Effective Open-Loop Process Theorem

作　　者：丁媛媛[1] 刘天琪[1] 李保宏[1] 李兴源[1] 

机构地区：[1]四川大学电气信息学院,四川省成都市610065

出　　处：《电网技术》2016年第7期1951-1956,共6页Power System Technology

基　　金：国家电网公司科技项目(大型风电/光伏发电基地功率汇集与外送技术研究;522830140003)~~

摘　　要：通过等效解耦过程(effective open-loop process)将多输入多输出系统中的各回路进行解耦,把多变量系统回路方程形式转换为单变量系统回路方程,从而建立起各回路独立控制的数学模型。但在多输入多输出系统中,各回路控制器之间可能存在无法协调的问题,为此,在实现等效解耦过程解耦控制的基础上,基于小增益定理,提出判断交直流系统协调控制鲁棒稳定性的量化指标;且针对发电机PSS附加控制与直流附加控制的协调控制,设计了能够协调运作且抑制低频振荡的发电机PSS附加控制器和直流附加控制器。在PSCAD中进行算例仿真验证了所提判断交直流系统协调控制鲁棒稳定性量化指标的有效性和所设计控制器的实用性。In multi-input multi-output system, each loop can be decoupled with effective open-loop process theorem. Multi-variable system loop matrix equation is converted into many single variable system loop equations. So each loop can be independently controlled. To eliminate potential adverse interaction among loop controllers, a coordinated control robust stability index of HVDC and PSS supplementary damping control was proposed based on effective open-loop process theorem and small gain theorem. PSCAD simulation results show its effectiveness in suppressing low frequency oscillation of the designed controllers and validity of the proposed index.

关 键 词：等效解耦过程 小增益定理 附加阻尼控制器 协调控制 低频振荡 

分 类 号：TM72[电气工程—电力系统及自动化]