一種微電網(wǎng)無功均分的改進(jìn)控制策略
[Abstract]:Under the influence of line impedance mismatch and other factors, traditional droop control is difficult to reasonably distribute reactive power according to droop gain. In order to improve the average distribution accuracy of reactive power output from distributed microsource in microgrid, the traditional droop control is difficult to distribute reactive power according to droop gain. Without reducing voltage quality, an improved droop control strategy based on synchronization is proposed for microgrid reactive power sharing. Based on the traditional droop control, the reactive power compensation and voltage recovery mechanism are introduced, and the voltage bias of the droop characteristic curve is modified by the trigger of the low bandwidth synchronous signal issued by the central controller. The accuracy of reactive power distribution is improved, and the voltage recovery mechanism compensates for the decrease of the output voltage, and realizes the voltage recovery. The stability of the algorithm is proved theoretically, and the simulation and experimental results show that the improved droop control method realizes the reasonable equal distribution of active and reactive power, and has good dynamic and steady-state performance.
【作者單位】: 中南大學(xué)信息科學(xué)與工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(61174125)~~
【分類號(hào)】:TM714.3
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