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首页> 外文期刊>Electric power systems research >Bi-directional real and reactive power control using constant frequency hysteresis control with reduced losses
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Bi-directional real and reactive power control using constant frequency hysteresis control with reduced losses

机译：使用恒定频率磁滞控制的双向有功和无功功率控制，减少了损耗

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摘要

A simple control technique for the bi-directional real and reactive power flow between dc source and ac grid is presented. A three-phase, three-wire ac grid system is considered. It is shown that for each 60° duration of the line cycle, the three-phase bridge can be considered as dual buck, buck and boost, or dual boost topology depending on the power factor angle of the injected current. Switching tables, for different power factor angles, have been derived corresponding to different circuit topologies. It is shown that to achieve hysteresis control, only two devices need to be controlled at any instant of time. This scheme is simulated with hysteresis control at constant frequency. The injected current magnitude is controlled depending on the dc bus voltage. Power factor of the current injected into the grid can be changed by suitably selecting the switching algorithm. Current distortion is controllable using hysteresis band. Simulation results for different power factors are given as result. Finally, switching loss for different schemes have been analyzed.
机译：提出了一种用于直流电源和交流电网之间双向有功和无功潮流的简单控制技术。考虑使用三相三线交流电网系统。结果表明，对于线路周期的每个60°持续时间，根据注入电流的功率因数角度，可以将三相电桥视为双降压，降压和升压或双升压拓扑。已针对不同的电路拓扑得出了针对不同功率因数角度的开关表。结果表明，要实现磁滞控制，在任何时刻都只需要控制两个设备。该方案通过恒定频率的磁滞控制进行仿真。注入电流的大小取决于直流母线电压。可以通过适当选择开关算法来改变注入电网的电流的功率因数。使用迟滞带可控制电流失真。结果给出了不同功率因数的仿真结果。最后，分析了不同方案的开关损耗。

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