基于连续潮流的交直流混合输电系统电压稳定性分析

Voltage Stability Analysis of AC/DC Hybrid Transmission System Based on Continuous Power Flow

随着电力行业的快速发展,电力系统采用交直流输电已被广泛使用。采用了将直流系统约束方程和交流系统约束方程相结合的改进连续潮流法,并且同时具备了交替求解法的处理直流控制方式的优势,在最后的算例中,通过对不同控制方式下的电压稳定裕度和各节点的电压进行求解、分析研究,验证算法的有效性。

With the rapid development of the power industry, the AC and DC transmission of power system hasbecome an inevitable trend. In this paper, the improved continuous flow method was used to analyze the staticvoltage stability of AC/DC hybrid transmission system. The AC system and the DC system were cut open, sothat the prediction and correction of the continuous flow calculation were simplified. At the same time, thecontrol of converter transformer ratio and the switching of reactive power compensation device wereconsidered in the calculation process, which improved the convergence speed. In the final example, the voltagestability margin under different control modes and the voltage of each node were solved and analyzed to verifythe effectiveness of the algorithm.