大规模电解铝负荷接入对滇东南电网 稳定影响及解决措施

Influence of Massive Electrolytic Aluminum Load on the Stability After Connecting to Southeastern Yunnan Power Grid and the Solution Measures

电解铝负荷大规模接入云南电网特别是滇东南电网后,加重了相关断面的潮流,同时由于滇东南网架结构较弱,在完整网架或设备检修网架下发生近区短路故障后,可能出现电网稳定问题,降低电网稳定水平。本文参照IEEE Task Force负荷建模工作组提出的电解铝负荷模型对其进行建模,以更为准确地反映电解铝负荷不同于常规负荷模型的外特性。并结合云南电网负荷“枯高丰低”特点,运用仿真软件BPA,在枯期大方式多种潮流走向下开展电网稳定问题计算分析,得到能涵盖大多数运行方式的滇东南电网稳定问题结论,并针对相关电网稳定问题,研究可采取的管理手段及技术措施,提高电网稳定性,保障用户持续可靠用电。

After the electrolytic aluminum load is connected to Yunnan Power Grid on a large scale,it aggravtes the power flow of relevant sections.At the same time,due to the weak grid structure in Southeast Yunnan,power grid stability problems may occur and the stability level of power grid will be reduced after near-zone short circuit fault aluminum is modeled according to the load modeling group of IEEE Task Force,so as to more accurately reflect the external characteristics of electrolytic aluminum load different from the conventional load model.In combination with the characteristics of"heavy load in dry season and light load in wet season"of Yunnan power grid,the simulation software BPA is used to calculate and analyze the power grid stability under various trends of large modes in dry season,and the conclusion of power grid stability in Southeast Yunnan that can cover most operation modes is obtained.Aiming at the relevant power grid stability problems,the management means and technical measures that can be taken are studied to improve the power grid stability,which ensure the continuous and reliable power consumption of users.