| 引用本文: | 刘海涛,龚乐年.降阶模型在原始系统闭环调节中应用[J].电力自动化设备,2010,(9): |
| LIU Haitao,GONG Lenian.Application of order-reduced model in close-loop regulation of original system[J].Electric Power Automation Equipment,2010,(9): |
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| 摘要: |
| 以降阶后的等值模型设计闭环调节器，推导和分析基于等值模型合理设计闭环调节器的方法，以等值模型中的状态变量予以反馈，按照闭环调节器的设计要求计算调节器反馈阵系数，进而得到原始系统的闭环方程，原始系统动态特性得以改善的同时，调节器的设计工作量大幅下降。实例中综合考虑原动机及其调速系统和励磁系统的影响，以发电机组自动励磁调节系统的附加辅助信号为控制量建立简单电力系统的状态空间方程，采用模态摄动法获得其对应的二阶等值模型，进而利用极点配置法设计闭环调节器，所得到的原始系统动态特性由不稳定转为稳定。 |
| 关键词: 调节器 闭环 电力系统 降阶 小扰动 |
| DOI： |
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| Application of order-reduced model in close-loop regulation of original system |
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LIU Haitao1, GONG Lenian2
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1.College of Electric Engineering，Southeast University，Nanjing 210096，China;2.Department of Electric Engineering，Nanjing Institute of Technology，Nanjing 211167，China
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| Abstract: |
| The order-reduced equivalent model is used to design the close-loop regulator and its approach is deduced and analyzed. With the state variable of equivalent model as the feedback，the feedback matrix coefficients of close-loop regulator are calculated according to the design requirements to derive the close-loop system equation of the original system，which improves the dynamic performance of the original system and significantly simplifies the regulator design. In the experiment，the additional auxiliary signals of AVR system are taken as the control variables to establish the state-space function of a simple power system，the influences of the prime motor and its speed-control system and excitation system being taken into account. The second-order equivalent model is obtained through modal perturbation and the close-loop regulator is finally designed with the pole-placement method. The dynamic performance of original system has changed from unstable to stable. |
| Key words: regulator close-loop power system order reduction small disturbance |
