基于PMU的可控制动电阻协调控制器研究  

PMU based TCBR coordinated controller

作　　者：张雪焱[1] 黄少锋[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京102206

出　　处：《电力自动化设备》2008年第5期55-58,共4页Electric Power Automation Equipment

摘　　要：同步相量测量单元(PMU)的广泛应用使得利用广域同步信息设计多机系统的协调控制器,进一步提高电力系统的暂态稳定性成为可能。建立了多机系统可控制动电阻(TCBR)控制器的数学模型,并设计了基于广域同步信息的协调控制器。控制器分为协调层和本地层,协调层利用PMU提供的全局实时信息处理各发电机之间的非线性关联量,产生全局优化向量;本地层则结合本地信息和全局优化向量,对发电机进行闭环反馈控制。所提方法避免了分散控制器之间的不协调动作,并且所采用的三级共态预估算法计算量小,适合于在线应用。对一个4机系统的仿真表明所提方法可以有效地提高系统的暂态稳定性。The wide application of PMU（Phasor Measurement Unit） makes it possible to design the coordinated controller based on wide-area synchro measurements for multi-machine system to improve its transient stability. The mathematic model of TCBR（Thyristor Controlled Braking Resistor） controller is built and the coordinated controller based on wide-area synchro measurements is designed,which is of two-layer structure. The coordination layer applies the real-time global information provided by PMU and treats the nonlinear correlation among machines to generate the global optimal vector;while the local layer combines the global optimal vector with local information to implement the closed-loop feedback control of local machine,which avoids the uncoordinated operation among the decentralized controllers. Three-level co-state prediction algorithm with less calculation load is adopted for online application. Simulation for a four-machine system shows the proposed controller improves the transient stability of power system effectively.

关 键 词：协调控制器 相量测量单元 可控制动电阻 三级共态预估算法 

分 类 号：TM712[电气工程—电力系统及自动化]