摘要
输电系统的暂态稳定性极易受到不确定参数和未知扰动的影响,而基于某一工作点的线性化模型的控制方法无法解决这些不确定因素带来的问题。因此,提出了一种晶闸管控制串联补偿装置TCSC(thyristor con-trolled series compensation)与发电机励磁的自适应鲁棒协调控制方法,将自适应反步(adaptive backstepping)算法和L2增益控制相结合。首先对系统进行降阶;然后递推地构造每个子系统的耗散不等式,通过自适应律和子系统控制律的设计,让子系统满足耗散性,从而保证子系统的鲁棒扰动抑制能力;最后,对装设TCSC的单机无穷大输电系统模型故障情况进行仿真。结果表明,所设计的ARCC方法可以明显改善发电机功角和TCSC接入点电压的动态响应,从而提高电力输电系统的暂态稳定性。
The transient stability of power transmission system is vulnerable to uncertain parameter and unknown distur-bances, while the control methods based on linearized model on some operation points cannot deal with these uncertainties. In order to solve this problem, an adaptive robust coordinated control （ARCC）, which combines adaptive backstep- ping algorithm and L2-gain control, is proposed for thyristor controlled series compensation （TCSC） and generator excitation. First, the system order is reduced. Then, dissipation inequation is constructed recursively, and the adaptive law and the control law of sub-system are also designed to make the subsystem satisfy dissipativeness, which guarantees the robustness of disturbance suppression of the subsystem. Finally, the simulation results on the single-machine infinitebus system with TCSC under fault demonstrate that the proposed ARCC method can improve the transient performance of the generator power angle and the dynamic response of voltage at the injection point of TCSC effectively, which indicates that the transient stability of the power transmission system can be enhanced.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2017年第5期48-53,共6页
Proceedings of the CSU-EPSA
基金
国家自然科学基金青年资助项目(51607133)
陕西省教育厅科研计划资助项目(14JK1306)
西安工程大学博士科研启动基金资助项目(BS1337)
关键词
晶闸管控制串联补偿装置
自适应反步
L2增益控制
协调控制
thyristor controlled series compensation （TCSC）
adaptive backstepping
L2-gain control
coordinated con- trol
