行业资料-交通装置-CRH3-380动车组牵引变流器TCU软件上传工艺方法.zip
2021-09-07 18:04:12
616KB
行业-电子政务-抑制牵引变流器直流母线电压振荡的方法、装置及牵引系统.zip
2021-09-04 18:01:33
894KB
Abstract —— In order to improve adaptability for wind power gridconnected converter under non-ideal grid conditions and reduce the harmonic influence, harmonic suppression mechanism for grid-connected converter is depth analyzed and harmonic suppression method and theory is derived. Be limited by complexity of the control system, compound control strategy composed by repetitive controller paralleled with PI controller is proposed for grid-connected converters control in this paper. System stability is analyzed, Geometric representation for repetitive controller stability is shown in figure and Control system difference equation is deduced. Using the proposed control strategy, no difference tracking current control is achieved in the fundamental positive sequence reference frame. The gird current harmonic can be effectively reduced and the
converter grid adaptability is improved. The simulation and experimental results verified the effectiveness of the proposed control strategy.
2021-08-26 14:08:24
454KB
1
ABSTRACT
Due to the power-grid low-order harmonic voltage and the nonlinearity of power electronic devices, the grid-connected converter of wind power generation system produces grid-connected harmonic current. In order to improve the output power quality of full-power grid-connected converter of wind power generation system, based on the detailed analysis of the harmonic mathematical model of grid-side converter, a cross-coupling control strategy for suppressing the low-order harmonic current components is proposed in this paper. In this control strategy, the DC component of each grid-connected harmonic current is detected in the multi-synchronous rotating coordinate system, and the current cross-coupling control method is adopted to realize the accurate control of each harmonic current. The harmonic current cross-coupling controller is analyzed and designed in detail. The proposed control strategy takes into account the cross-coupling effect of each harmonic current, which can effectively reduce the interaction between each harmonic current and the fundamental current, and improve the stability of the system. Simulation and experimental test verify the correctness and feasibility of the proposed control strategy.
2021-08-25 17:05:36
2.4MB
1
行业资料-电子功用-具有三个全控型变流器的无刷双馈电机调速装置.pdf.zip
2021-08-24 09:11:08
286KB