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Henan Polytechnic University, 2001 Century Avenue, Jiaozuo (454003), Henan, P.R.China
As one of the major pieces of equipment in fully mechanized coal mining, the drum shearer plays a critical role in improving the efficiency and energy utilization in the coal mining production process. In this paper, an energy consumption model of a shearer, derived from the analysis of the cutting and traction resistances on the shearer during different processes within a working cycle, is established. Based on the derived model, control and coordination strategies between the two speeds are proposed to minimize the shearer’s energy consumption in unidirectional mining. The case study of a real coal mine shows that the proposed models are valid, and the optimal control of shearer speeds can effectively reduce the energy consumption by 5.16% in a working cycle. To gain further insights into the impact of traction speed and drum rotational speed on the shearer’s energy consumption, several speed coordination cases are employed to further compare with the optimized one. Our study results show that the energy consumption of a shearer can be decreased with the increase of traction speed while decreasing drum rotational speed in coordination.
Zheng Zheng; Dilei Chen; Tao Huang; Guopeng Zhang. Coordinated Speed Control Strategy for Minimizing Energy Consumption of a Shearer in Fully Mechanized Mining. Energies 2021, 14, 1224 .
AMA StyleZheng Zheng, Dilei Chen, Tao Huang, Guopeng Zhang. Coordinated Speed Control Strategy for Minimizing Energy Consumption of a Shearer in Fully Mechanized Mining. Energies. 2021; 14 (5):1224.
Chicago/Turabian StyleZheng Zheng; Dilei Chen; Tao Huang; Guopeng Zhang. 2021. "Coordinated Speed Control Strategy for Minimizing Energy Consumption of a Shearer in Fully Mechanized Mining." Energies 14, no. 5: 1224.
The resonance problem of multi-paralleled grid-connected inverters with inductance-capacitance-inductance (LCL) filters is a core matter which bothers the safety and stability operation of new energy distribution networks. Based on the impedance model of the paralleled system of two inverters, the influence of inverters on grid-connected current was analyzed through the superposition principle, and the grid-connected current was decomposed. The resonant mechanism generated by interactive current and the common current was studied, and the resonance frequency characteristics were compared and analyzed by a paralleled system using the same and differently rated power inverters. Based on the resonance frequency generated by interactive current, a digital notch filter was introduced into the traditional capacitance current active damping control scheme, which realized the non-static control of base wave signal and satisfied the standard of multi-paralleled grid-connected inverters with LCL filters. Finally, simulation results verified the correctness and validity of the proposed strategy.
Haijun Tao; Yousong Zhou; Guopeng Zhang; Zheng Zheng; Tao; Zhou. Parallel Resonance Mechanism Analysis and Suppression of Inductance-Capacitance-Inductance Grid-Connected Inverters. Energies 2019, 12, 1656 .
AMA StyleHaijun Tao, Yousong Zhou, Guopeng Zhang, Zheng Zheng, Tao, Zhou. Parallel Resonance Mechanism Analysis and Suppression of Inductance-Capacitance-Inductance Grid-Connected Inverters. Energies. 2019; 12 (9):1656.
Chicago/Turabian StyleHaijun Tao; Yousong Zhou; Guopeng Zhang; Zheng Zheng; Tao; Zhou. 2019. "Parallel Resonance Mechanism Analysis and Suppression of Inductance-Capacitance-Inductance Grid-Connected Inverters." Energies 12, no. 9: 1656.