PI控制器參數對并網永磁直驅型風力發(fā)電系統(tǒng)機網相互作用的影響
發(fā)布時間:2018-12-05 19:30
【摘要】:為了研究并網永磁直驅型風力發(fā)電(PMSG)系統(tǒng)的振蕩問題,建立了基于PQ解耦控制的PMSG系統(tǒng)的小信號模型。用特征值分析法和相關因子分析方法,找出了系統(tǒng)所有的振蕩模態(tài)、特征頻率和主導每種振蕩模態(tài)的狀態(tài)變量,并用基于Copula理論的分布估計算法尋找最優(yōu)的PI控制器參數組合。通過MATLAB/Simulink平臺進行時域仿真,驗證了各種振蕩模態(tài)的存在。在不改變系統(tǒng)穩(wěn)定性的前提下,依次改變變流器的控制參數,研究了系統(tǒng)的次同步控制相互作用、次同步振蕩和低頻振蕩模態(tài)的變化情況。利用最佳PI控制器參數對所建PMSG系統(tǒng)模型進行模態(tài)分析,仿真結果驗證了所提模型的正確性。
[Abstract]:In order to study the oscillation of (PMSG) system in grid-connected permanent magnet direct-drive wind power generation, a small-signal model of PMSG system based on PQ decoupling control is established. By means of eigenvalue analysis and correlation factor analysis, all oscillation modes, characteristic frequencies and state variables dominating each oscillation mode of the system are found, and the optimal combination of PI controller parameters is found by the distribution estimation algorithm based on Copula theory. The existence of various oscillatory modes is verified by time domain simulation on MATLAB/Simulink platform. Without changing the stability of the system, the control parameters of the converter are changed in turn, and the variation of the subsynchronous control interaction, the sub-synchronous oscillation and the low-frequency oscillation mode of the system are studied. The modal analysis of the PMSG system model is carried out by using the optimal parameters of the PI controller. The simulation results verify the correctness of the proposed model.
【作者單位】: 上海交通大學電氣工程系電子信息與電氣工程學院;上海電機學院電氣學院;
【基金】:國家自然科學基金資助項目(51277119,51477098) 國家電網公司科技項目(電壓源型換流器群及其與電網間振蕩的機理與抑制方法研究)(5442NY160025)~~
【分類號】:TM614
[Abstract]:In order to study the oscillation of (PMSG) system in grid-connected permanent magnet direct-drive wind power generation, a small-signal model of PMSG system based on PQ decoupling control is established. By means of eigenvalue analysis and correlation factor analysis, all oscillation modes, characteristic frequencies and state variables dominating each oscillation mode of the system are found, and the optimal combination of PI controller parameters is found by the distribution estimation algorithm based on Copula theory. The existence of various oscillatory modes is verified by time domain simulation on MATLAB/Simulink platform. Without changing the stability of the system, the control parameters of the converter are changed in turn, and the variation of the subsynchronous control interaction, the sub-synchronous oscillation and the low-frequency oscillation mode of the system are studied. The modal analysis of the PMSG system model is carried out by using the optimal parameters of the PI controller. The simulation results verify the correctness of the proposed model.
【作者單位】: 上海交通大學電氣工程系電子信息與電氣工程學院;上海電機學院電氣學院;
【基金】:國家自然科學基金資助項目(51277119,51477098) 國家電網公司科技項目(電壓源型換流器群及其與電網間振蕩的機理與抑制方法研究)(5442NY160025)~~
【分類號】:TM614
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