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| 1 | Enhancing HVRT Capability of DFIG-based Wind Farms Using Cooperative Rotor-side SMES Considering the Blocking Fault of LCC-HVDC System显示文摘Line-commutated converter based high voltage direct current(LCC-HVDC)has been applied for transferring bulk power from wind farms to load centers through long distances in many countries.When the blocking fault of the LCC-HVDC system occurs,the surplus reactive power accumulated at the sending end will lead to an overvoltage,thus causing the discon・nection of the wind turbines.To maintain the reliable connection of wind turbines and ensure the stability of the power system,this paper introduces a superconducting magnetic energy storage(SMES)unit to connect in parallel with the rotor side of the doubly fed induction generator(DFIG).By controlling the energy side converter and rotor side converter to inject demagnetizing current and reactive current into the rotor,the proposed scheme can effectively stabilize key parameters of the wind turbine and provide desirable reactive power support,showing a favorable high voltage ride through(HVRT)performance.Several cases based on PSCAD/EMTDC&MATLAB/Simuiink co-simulation together with economic analysis are conducted to demonstrate the feasibility and superiority of the proposed scheme on enhancing HVRT capability of DFIG-based wind farms. | Qi Xie Zixuan Zheng Xianyong Xiao Chunjun Huang Jiaqu Zheng Jie Ren | 2021 | CSEE Journal of Power and Energy Systems2021，7，4： | 3 |
| 2 | Heterogeneous nucleation of n-butanol vapor on submicrometer particles of SiO2 and TiO2显示文摘 | Chen Chincheng Huang Chongcheng Tao Chunjun | 1999 | Journal of Colloid and Interface Science1999，211，： | 1 |
| 3 | Bionics-based Optimization of Step-climbing Gait in a Novel Mini-RHex Robot显示文摘RHex-style robots can perform manifold moving gaits in different applications,but they have always faced a challenge of climbing up high obstacles.In this paper,the bionics-based gait optimization in an RHex-style robot is proposed for climbing steps at different heights,which even enables the robot to climb up the step with 4.2 times of the leg length.First,a thoracic flexion is designed in the robot,and an algorithm of adjusting body inclination is proposed to perform the rising stage after placing front legs on top of step,which can be applied in different RHex-style robots with different sizes.Especially,when the thoracic flexion is implemented,the robot can climb the higher step with the proposed algorithm.Second,to climbing the higher steps,a claw-shape legs-based algorithm is proposed for robot reaching the higher step and climbing it up.During the vital rising stage,when the front legs of the robot have reached the top of the step,the robot can bend the front body downward with its thoracic flexion like a cockroach,and then lift the front and middle legs alternately to move COM up and forward onto the step.The simulation analysis is utilized to verify the feasibility of the proposed algorithms.Finally,the step-climbing experiments at different heights are performed in our robot to compare with the existing works.The results of simulations and experiments show the superiority of the proposed algorithms for the improved robot due to climbing up the higher steps. | Xingguo Song Jiajun Pan Xiaolong Zhang Chunjun Chen Danshan Huang | 2022 | Journal of Bionic Engineering2022，19，3： | 0 |
| 4 | Cockroach-inspired Traversing Narrow Obstacles for a Sprawled Hexapod Robot显示文摘Inspired by the cockroach’s use of a pitch-roll mode traverses through narrow obstacles,we improve the RHex-style robot by adding two sprawl joints to adjust the body posture,and propose a novel pitch-roll approach that enables an RHex-style robot to traverse through two cylindrical obstacles with a spacing of 90 mm,about 54%body width.First,the robot can pitch up against the obstacle on the one side by the cooperation of its rear and middle legs.Then,the robot rotates one side rear leg to kick the ground fast,meanwhile the sprawl joint on the other side rotates inward to make the robot roll and fall forward.Finally,the robot can rotate the legs on the ground to move the body forward until it crosses the obstacles.In this article,both cylinder and rectangular columns are considered as the narrow obstacles for traversing.The experiments are demonstrated by using the proposed approach,and the results show that the robot can smoothly traverse through different narrow spaces. | Xingguo Song Jiajun Pan Faming Lin Xiaolong Zhang Chunjun Chen Danshan Huang | 2022 | Journal of Bionic Engineering2022，19，5： | 0 |
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