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| 摘要: |
| 对于两台发电机母线和一个负荷母线组成的简单电力系统，在负荷母线的无功功率逐渐变化时，会发生亚临界，超临界Hopf分岔和鞍结点分岔，并导致混沌现象和电压崩溃现象，但通过在鞍结分岔平衡点设计的线性状态反馈控制器可以在无功功率的一定范围内消除这些现象，并使系统受扰偏离平衡点后迅速回到平衡点，且该控制器只需用到发电机角速度和负荷母线电压幅值两个状态量，因此，该控制器简单实用，另外对该控制器设计过程中的有关问题进行了讨论，数值仿真说明了该控制器的有效性。 |
| 关键词: 电力系统 电压崩溃控制 电压稳定 混沌 线性状态反馈 |
| DOI： |
| 分类号:TM712 |
| 基金项目:南京理工大学科研发展基金 |
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| An effective control of electric power system voltage collapse |
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WANG Bao-hua 1 2 ZHANG Qiang 2 YANG Wei 1 YANG Cheng-wu 1
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| Abstract: |
| Supercritical Hopf bifurcation,subcritical Hopf bifurcation,saddle node bifurcation,chaos motion and voltage collapse happen in a simple power system containing two generators and a nonlinear load when the load reactive power increases gradually.These bifurcations and phenomena are presented briefly.Linear state variable feedback controller at saddle node bifurcation equilibrium has been designed to eliminate all these bifurcations,chaos motion and voltage collapse as well as make the perturbed run point come back to equilibrium.The controller is simple and only two state variables are needed,namely the generator angle velocity and the load voltage magnitude.In addi-tion,the relational issues for the controller design have been discussed and the numerical simulation results show its effectiveness.The project is supported by Science Research and Development Foundation of Nanjing Uni-versity of Science and Technology. |
| Key words: bifurcation,voltage collapse,chaos,linear state variable feedback,equilibrium |
