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Multi-Agent Based Distributed Coordinated Control Study For Multi-Motor Cupled Power System Stability

Posted on:2018-03-16Degree:MasterType:Thesis
Country:ChinaCandidate:Y Y ZongFull Text:PDF
GTID:2322330533463197Subject:Engineering
Abstract/Summary:PDF Full Text Request
The regional interconnection of the modern power system makes the stable operation of the power system face new opportunities and challenges.In this paper,a novel distributed coordinated robust control strategy based on multi-agent is proposed to improve the stability of multi-machine coupled large-power systems based on grid structure and distributed coordinated control scheme.Firstly,from the grid structure,the three-layer multi-agent model of the power system is built,which is the control layer,the network transmission layer and the information layer respectively.This paper focuses on control layer,which consists of a series of dynamic nodes equal quantity to synchronous generators.In the information layer,transient stability evaluation module is designed and its results related to the information agent to send remote signals to the control layer or not determine the two-level distributed coordination control sub-layer switching.In control layer,aimed to decouple the multi-machine system,the complex nonlinear coupling term of the model is dealt creatively with the extended state where second-order extended state observer and disturbance compensator are utilized based on active disturbance rejection control.Then distributed coordinated robust controllers are designed respectively for the decoupled linear model,aimed to eliminate the observation error and external disturbances.Finally,the effectiveness and robustness of the control scheme are verified by power system simulation.Secondly,from the aspects of the enforceability of distributed coordination,the problem of transmission consistency in multi-agent system is studied,and the consistency protocol of dynamic nodes with synchronous generators is designed.The control layer topology determined by information agent is assumed as undirected in this paper considering the dual information flow in real power system.The virtual leader expressing the expected states of the dynamic nodes followers can be tracked in finite-time by integral sliding mode technology.Finally,the simulation example verifies the validity of the protocol.
Keywords/Search Tags:power system control, multi-agent system, transient stability, extended state observer, consensus protocol
PDF Full Text Request
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