基于轨迹特征根的功率控制灵敏度分析及应用  

Analysis and Application of Power Control Sensitivity Based on Trajectory Eigenvalues

作　　者：谭伟[1] 沈沉[1] 倪敬敏[1] 李颖[1] 

机构地区：[1]电力系统国家重点实验室,清华大学电机系,北京市100084

出　　处：《电力系统自动化》2010年第18期1-5,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50777032);新世纪优秀人才支持计划资助项目(NCET-08-0317)~~

摘　　要：沿着故障切除后系统状态量的轨迹,计算轨迹特征根并推导发电机的状态量与各发电机节点注入功率之间的灵敏度关系,为功率控制地点的确定提供了有效的信息。计算功角及转速均超前于惯量中心的所有发电机不平衡功率之和,并将其在灵敏度为正的控制点之间进行分摊,得到各功率控制点的控制量。该算法能快速给出功率控制点,有利于控制策略的快速制订。通过仿真将该算法应用于新英格兰39节点系统及国内某实际电力系统,结果表明该算法能有效抑制机群失稳问题,具有很好的适用性和有效性。After system faults are cleared,trajectory eigenvalues can be calculated along the system trajectory.The sensitivities of the eigenvalues to the power injections are deduced.Control sensitivities of different generator nodes are defined and obtained quantitatively accordingly.They can be used to determine the location of emergency control and allocate the amount of load shedding.The algorithm provides control locations quickly,which is suited for formulating the control strategy.Case studies on the New England 39-bus system and an actual domestic power system are provided to demonstrate the approach.The results show that the proposed approach can maintain the system stability effectively.

关 键 词：轨迹特征根 控制灵敏度 功率控制 紧急控制 

分 类 号：TM712[电气工程—电力系统及自动化]