-
1.发明授权公开(公告)号：US10447190B2
公开(公告)日：2019-10-15
申请号：US15759344
申请日：2016-12-09
Applicant: South China University of Technology
Inventor： Qinghua Wu , Yang Liu
Abstract: A multi-loop switching control system for a doubly-fed wind turbine based on logic switch control. Output variables of the doubly-fed wind turbine may be used to form output feedback control channels. Each output feedback control channel may switch between a switch controller and a vector controller to form a multi-loop switching controller. When a power system associated with the doubly-fed wind turbine is subjected to a relatively large external disturbance, state variables and the output variables of the wind turbine deviate from an original balance point, and the output feedback control loops of the doubly-fed wind turbine are switched from the vector controller to the switch controller. Under control of the switch controller, the state variables and output variables return to a vicinity of the original balance point, and the output feedback control loops of the wind turbine are switched from the switch controller to the vector controller.
-
2.发明申请公开(公告)号：US20180254725A1
公开(公告)日：2018-09-06
申请号：US15759344
申请日：2016-12-09
Applicant: South China University of Technology
Inventor： Qinghua Wu , Yang Liu
CPC classification number: H02P9/02 , H02J3/18 , H02J3/38 , H02J3/386 , H02J3/50 , H02P9/007 , H02P21/50 , H02P2101/15 , Y02E40/30
Abstract: A multi-loop switching control system for a doubly-fed wind turbine based on logic switch control. Output variables of the doubly-fed wind turbine may be used to form output feedback control channels. Each output feedback control channel may switch between a switch controller and a vector controller to form a multi-loop switching controller. When a power system associated with the doubly-fed wind turbine is subjected to a relatively large external disturbance, state variables and the output variables of the wind turbine deviate from an original balance point, and the output feedback control loops of the doubly-fed wind turbine are switched from the vector controller to the switch controller. Under control of the switch controller, the state variables and output variables return to a vicinity of the original balance point, and the output feedback control loops of the wind turbine are switched from the switch controller to the vector controller.
-
3.发明公开公开(公告)号：US20230161836A1
公开(公告)日：2023-05-25
申请号：US18094978
申请日：2023-01-09
Applicant: South China University of Technology
Inventor： Qinghua Wu , Luliang Zhang , Mingchang Huang
IPC: G06F17/17
CPC classification number: G06F17/17
Abstract: A signal processing method based on mathematical morphology with sparse structural elements is disclosed, including the steps of: 1) building sparse structural elements; 2) performing morphological filtering on a signal by using the sparse structural elements; 3) improving a filtering effect for a filtering result by using a multi-stage sparse algorithm or a two-stage sparse algorithm; 4) building dissociative structural elements and a bipolar morphological gradient; and 5) performing a bipolar morphological gradient extraction on the signal by using the dissociative structural elements. The method can effectively reduce the calculation amount and calculation time of mathematical morphology signal processing and enhance the amplitude of the morphological gradient.
-
4.发明授权公开(公告)号：US09673691B2
公开(公告)日：2017-06-06
申请号：US15030191
申请日：2013-12-23
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Qinghua Wu , Lei Wang
CPC classification number: H02M1/00 , H02M3/156 , H02M3/1563 , H02M3/157 , H02M2001/0009 , H02M2003/1566
Abstract: An energy balance controller includes a detection unit, a calculation unit and a reset integral module; the reset integral module includes a reset integrator, a comparator and an RS flip-flop; the input terminals of the calculation unit and the reset integrator are connected to the output terminal of the detection unit, respectively; the output terminal of the calculation unit is connected to one input terminal of the comparator, and the output terminal of the reset integrator is connected to the other input terminal of the comparator; the output terminal of the comparator is connected to the reset terminal of the RS flip-flop; the Q terminal of the RS flip-flop is connected to the reset integrator, and the Q terminal of the RS flip-flop is used for controlling a switching device of the converter to switch on or off; the method is implemented by the energy balance controller.
-
-
-
Search Results
4
records
(took 0.014 seconds)
