基于扩张状态观测器的汽轮机功频电液串级控制  

Cascaded Load-frequency Digital Electric-hydraulic Regulation of Turbine via Extended State Observer

作　　者：孙立[1] 董君伊[1] 李东海[1] 薛亚丽[1] 

机构地区：[1]电力系统国家重点实验室(清华大学),北京市海淀区100084

出　　处：《中国电机工程学报》2015年第7期1697-1703,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51176086)~~

摘　　要：现代电网对火电机组参与调峰调频提出了日益严格的要求。在"炉跟机"协调方案下,汽轮机调节系统的快速性使其能很好地满足电网负荷调度的要求,但同时可能会造成进汽调门反复调节。文中通过探究传统控制方案的缺陷,提出一种基于扩张状态观测器(extended state observer,ESO)的新型汽轮机功频电液串级控制策略,将原串级PI方案修正为串级比例控制,以ESO实时估计各种扰动并作为新的一级加以主动补偿。频域分析表明本方案能够有效克服传统设计中快速性和稳定性的矛盾。动态仿真结果表明,该方案能够以较小控制代价满足电网调峰调频的要求,控制量波动范围显著减小,且具有更强的抗扰能力和鲁棒性。The modern power plant needs to meet increasingly stringent requirements from power grid in participating in load-frequency regulation. Under the traditional＂boiler follows turbine＂ scheme, the rapidity of turbine make it practical of satisfying the requirements of power grid.However, it usually leads to frequent valve action. This paper analyzed the deficiencies of the traditional schemes and proposed a novel cascaded control strategy of electrichydraulic turbine regulation via extended state observer （ESO）.The ESO, estimating and actively compensating the total disturbances, was designed as a third input of cascaded structure. The frequency domain analysis demonstrates the superiority of the strategy proposed in dealing with the conflict between stability and rapidity. Simulation results demonstrate that the performance of load and frequency regulation and disturbance rejection can be improved with less control energy and stronger robustness.

关 键 词：汽轮机 数字电液调节 扩张状态观测器 调峰调频 抗扰 

分 类 号：TK323[动力工程及工程热物理—热能工程]