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| 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。 |
| 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 |
| DOI： |
| 分类号:TM571 |
| 基金项目: |
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| PMU based TCBR coordinated controller |
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ZHANG Xueyan,HUANG Shaofeng
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| Abstract: |
| 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. |
| Key words: coordinated controller,PMU,TCBR,three-level co-state prediction algorithm |
