U²-P Droop Control Strategy Considering the Effect of Line Resistance

Droop control is commonly utilized due to its independence from communication systems and its high reliability. However, there are inherent defects, when power fluctuation occurs in the system, the presence of line resistance leads to inaccuracies in the power distribution among the converter stations. Additionally, the droop coefficient results in a reduction of the voltage on the DC side. Under these circumstances, this paper proposes a U<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>-P droop control strategy that considers the effect of line resistance. First, the line resistance is valued. Then, proposing an improved U<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>- P droop control strategy. Finally, a droop coefficient rectification method based on U<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>- P droop control is deduced by analyzing the impact of line resistance on power allocation in converter stations, to reduce the dependence of the converter station on the communication device, the power margin is replaced with the rated capacity of the converter station.