电阻负载单相全波整流电路无功分量的一种图解方法

Graphic Analysis of Reactive Power for the 1-phase Full-wave Rectifier With Resistive Load

目前的功率理论难以适应用途广泛的相控整流电路。现通过分析交流电能传输过程,指出交流纯电阻负载也伴随着瞬时无功能量流。先由Poynting方程导入电磁能量传输概况、用Lissajous图形量化瞬时有功和瞬时无功能量流,再基于纯阻负载单相全波相控整流电路的网侧电压波形和电流波形,绘出立体图及其投影分图来解析瞬时有功功率和无功能量流。提出以三角形面积来计算无功能量流的新方法,可为相控整流电路的无功辨识和无功补偿提供参考。

The current power theory is not suitable for the widely applied phase-controlled rectifier circuit. The process of AC energy transmission was analyzed, and it is shown that the AC pure resistance load is also accompanied with instantaneous reactive energy flow. Firstly, the overview of electromagnetic energy transmission was introduced by the Poynting equation, and instantaneous active and reactive energy flow were quantified by Lissajous graphs. Then the stereogram and its two-dimension projections, used to solve the instantaneous active power and the reactive energy flow, were plotted based on the network side voltage and current waveform of the single phase full wave phased-controlled rectifier circuit with pure resistance load. A new method of solving the reactive energy flow was proposed, in which the reactive energy flow was calculated by triangle area. The new method proposed can provide some references for the reactive power identification and compensation of phase controlled rectifier circuit.