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Recently, the State Intellectual Property Office announced the patent applied by Xuchang University "A supercapacitor to flatten the voltage fluctuation system of wind power microgrid and its method thereof"
.
The present invention relates to the field of microgrid and wind power generation technology, specifically relates to wind power stabilization by using supercapacitors in wind power microgrids, and mainly applies voltage fluctuations in microgrids composed of wind power systems to suppress.
It is reported that the present invention gives a specific principle and system structure diagram for the application of supercapacitors to smooth voltage fluctuations in wind power microgrids, the system is composed of a wind power generation unit, a capacitor compensation device, a supercapacitor bank, a bidirectional DC/DC converter, a voltage source inverter and a filter circuit
.
As the supercapacitor energy storage unit and DC bus interface, the structure of the buck-boost bidirectional DC/DC converter is analyzed, and the duty cycle of the T1 and T2 switch transistors is changed through PWM control, so as to realize the charge and discharge control
of the supercapacitor.
The DC/DC converter adopts the dual closed-loop control strategy of voltage outer loop and current inner loop for control, and the specific control method
of power exchange of supercapacitor bank is given.
Recently, the State Intellectual Property Office announced the patent applied by Xuchang University "A supercapacitor to flatten the voltage fluctuation system of wind power microgrid and its method thereof"
.
The present invention relates to the field of microgrid and wind power generation technology, specifically relates to wind power stabilization by using supercapacitors in wind power microgrids, and mainly applies voltage fluctuations in microgrids composed of wind power systems to suppress.
It is reported that the present invention gives a specific principle and system structure diagram for the application of supercapacitors to smooth voltage fluctuations in wind power microgrids, the system is composed of a wind power generation unit, a capacitor compensation device, a supercapacitor bank, a bidirectional DC/DC converter, a voltage source inverter and a filter circuit
.
As the supercapacitor energy storage unit and DC bus interface, the structure of the buck-boost bidirectional DC/DC converter is analyzed, and the duty cycle of the T1 and T2 switch transistors is changed through PWM control, so as to realize the charge and discharge control
of the supercapacitor.
The DC/DC converter adopts the dual closed-loop control strategy of voltage outer loop and current inner loop for control, and the specific control method
of power exchange of supercapacitor bank is given.
