基于负荷模型云南电网动态稳定与传输极限研究

应用仿真软件BPA分析了负荷模型结构和参数对云南电网动态仿真的影响,对比了不同负荷模型结构和参数下系统的振荡频率和阻尼比,分别采用静态负荷模型和动态负荷模型计算了云南电网主要断面的功率传输极限。研究结果表明:当负荷位于受端时,动态负荷模型比静态负荷模型计算出的线路功率传输极限要高;当负荷位于送端时,则结果相反。在不同负荷模型下云南电网主要断面功率传输极限差距显著,因此,有必要建立云南电网动态负荷实测模型。

Load Model Based Study on Dynamic Stability and Transmission Limit of Yunnan Power Grid

Employing BPA simulation software to analyze the effect of load model structures and parameters on dynamic simulation of Yunnan Power Grid, and comparing the oscillation frequency and damping ratio under different load model structures and parameters, this paper calculates the power transmission limits of major sections in Yunnan Power Grid with static load model and dynamic load model separately. The results indicate that the power transmission limit with dynamic load modle is higher than that wth static load model when the load is on the end site of transmission line while the opposite case occurs when the load is on the start site of transmission line. The power transmission limits of major sections in Yunnan Power Grid are very different among different load models. So it is necessary to establish a measured dynamic load model for Yunnan Power Grid.