论文标题
在各种负载配置下的安全保证金估计方法的比较
Comparison of security margin estimation methods under various load configurations
论文作者
论文摘要
登录后的可加载能力限制（PCLL）和安全操作限制（SOL）是计算电力系统安全边距的两种主要方法。尽管SOL比PCLL的计算要求要大得多，但它可以在干扰后解释动态响应，并且通常可以更好地衡量安全余量。在这项研究中，比较了这两种方法之间的差异，并分析了一系列不同的偶然性和负载模型方案。在Nordic32测试系统的修改版本上开发和测试了一种允许两个安全保证金之间进行公平比较的方法。该研究表明，SOL可以与PCLL显着差异，尤其是当系统具有恒定功率特性的载荷较高的载荷或具有快速载荷恢复的大量感应电动机负载时。该方法之间的差异还测试了不同的意外情况，其中显示较长的断层清除时间可显着增加两个边缘之间的差异。
The post-contingency loadability limit (PCLL) and the secure operating limit (SOL) are the two main approaches used in computing the security margins of an electric power system. While the SOL is significantly more computationally demanding than the PCLL, it can account for the dynamic response after a disturbance and generally provides a better measure of the security margin. In this study, the difference between these two methods is compared and analyzed for a range of different contingency and load model scenarios. A methodology to allow a fair comparison between the two security margins is developed and tested on a modified version of the Nordic32 test system. The study shows that the SOL can differ significantly from the PCLL, especially when the system has a high penetration of loads with constant power characteristics, or a large share of induction motor loads with fast load restoration. The difference between the methods is also tested for different contingencies, where longer fault clearing times are shown to significantly increase the difference between the two margins.
