内蒙古电力技术

2021, (03) 84-88

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某地区500 kV电网供电能力分析及改进措施探讨
Analysis and Discussion on Improvement Measures of Power Supply Capability of 500 kV Power Grid in Some Area

南有斌,黄利飞,马乾有,王玉
NAN Youbin, HUANG Lifei, MA Qianyou, WANG Yu

摘要(Abstract):

对某地区电网供电能力不足的问题进行分析,认为主要原因是该地区电网因短路电流问题使得4台主变压器无法并列运行,造成QLS站与WH站的主变压器下送容量不足。提出在该地区新建一座500 kV变电站或者在500 kV QPJ站投产后对该地区电网结构进行优化两种方案,实现QLS、WH供电区域的解环,解环后该地区供电能力可得到显著提高,不再受现网架内薄弱断面影响,该地区新增负荷也不再受限,提出的方案可有效解决该地区供电能力不足的问题。
This paper analyzes the problem of insufficient power supply capacity of a local power grid, and considers that the main reason is that the four main transformers cannot run in parallel due to the short-circuit current problem of the local power grid, which results in the shortage of the sending capacity of the main transformers of QLS station and WH station. It is proposed to build a new 500 kV substation in this area or to optimize the power grid structure in this area after the 500 kV QPJ station is put into operation, so as to realize the unlinking of the QLS and WH power supply area. After the unlinking, the power supply capacity of this area can be significantly improved, which is no longer affected by the weak section in the current grid frame, and the new load in this area is no longer limited. The proposed scheme can effectively solve the problem of insufficient power supply in this area.

关键词(KeyWords): 地区电网;供电能力;电磁环网;短路电流;热稳定;暂态稳定
regional power grid;power supply capacity;electromagnetic loop network;short-circuit current;thermal stability;transient stability

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 南有斌,黄利飞,马乾有,王玉
NAN Youbin, HUANG Lifei, MA Qianyou, WANG Yu

DOI: 10.19929/j.cnki.nmgdljs.2021.0063

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