摘要
针对静止无功补偿器(SVC)抑制区域间低频振荡的性能受负荷特性影响的特点,在电力系统结构保留模型的基础上,提出一种结构保留模型反馈线性化的新方法。该方法基于电力系统微分代数模型,在系统关系数等于状态变量个数的条件下,可得出电力系统结构保留模型反馈线性化的能控标准型。充分考虑电力系统非线性静态负荷和母线电压对SVC附加控制的影响,将结构保留模型的反馈线性化方法应用到SVC的非线性控制器设计中,设计出相应的附加控制策略。仿真结果表明所设计的非线性附加控制器具有较好的阻尼特性,在有效提高系统动态稳定性的同时改善了系统电压稳定性。
In this paper,for the SVC damping effect is dependent on load characteristics,a structure-preserving feedback linearization approach based on power system structure-preserving model is proposed.A feedback standard form is derived when the relative degree of the system equals the system state variables dimension and certain designated conditions are satisfied.Then the proposed approach is applied to design of non-linear supplementary controller for a two-generator power system with SVC by taking full account of power loads and bus voltage influence in SVC supplementary control,a new supplementary control strategy is derived.The simulation results show the proposed control strategy can not only improve the performance of interconnection dynamic stability,but also enhance the operation stability of voltage.
出处
《东北电力大学学报》
2011年第1期17-23,共7页
Journal of Northeast Electric Power University
关键词
SVC
结构保留模型
反馈线性化
附加控制策略
SVC
Structure-preserving model
Feedback linearization
Supplementary control strategy
