750/330kV受端电网合理分区规模研究

随着330 kV受端电网主变台数增加,电网联系日益紧密,西北电网330 kV母线短路电流水平逐年增高,电网分区运行成为限制电网短路电流的重要措施。通过总结分析陕甘青地区典型的750/330 kV受端电网结构特点,考虑主变台数、主变容量及站间距离长度等因素,构建了单站独立供电、两站分区或三站链式分区的受端电网分区等值模型。通过分析典型分区模型短路电流水平及分区内主变负载率情况,确定了分区内主变台数的上下限,提出750/330 kV受端电网合理分区规模为2~3座750 kV变电站和约4~6台主变带一片330 kV电网。最后通过青海实际750/330 kV电网验证了所提750/330 kV受端电网分...

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Bibliographic Details
Published in电力系统保护与控制 Vol. 45; no. 20; pp. 137 - 142
Main Author 张祥成 郭秋婷 潘艳 陶昕 张文朝 田旭 彭龙
Format Journal Article
LanguageChinese
Published 国网青海省电力公司经济技术研究院,青海西宁,810000%南京南瑞集团公司,北京,102200 2017
Subjects
分区等值模型
分区规模
受端电网
短路电流
partition equivalent model
分区规模
分区等值模型
receiving-end power grid
partition scale
短路电流
受端电网
short-circuit current
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ISSN1674-3415
DOI10.7667/PSPC161653

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Summary:随着330 kV受端电网主变台数增加,电网联系日益紧密,西北电网330 kV母线短路电流水平逐年增高,电网分区运行成为限制电网短路电流的重要措施。通过总结分析陕甘青地区典型的750/330 kV受端电网结构特点,考虑主变台数、主变容量及站间距离长度等因素,构建了单站独立供电、两站分区或三站链式分区的受端电网分区等值模型。通过分析典型分区模型短路电流水平及分区内主变负载率情况,确定了分区内主变台数的上下限,提出750/330 kV受端电网合理分区规模为2~3座750 kV变电站和约4~6台主变带一片330 kV电网。最后通过青海实际750/330 kV电网验证了所提750/330 kV受端电网分区规模的有效性。
Bibliography:ZHANG Xiangcheng1, GUO Qiuting2, PAN Yan2, TAO Xin1, ZHANG Wenchao2, TIAN Xu1, PENG Long2 （1. State Grid Qinghai Electric Power Company Economic Research Institute, Xining 810000, China; 2. NARI Group Corporation, Beijing 102200, China）
With the increasing of the number of main transformers, the 330 kV receiving-end power grid increasingly interconnected, the short-circuit current level of Northwest power grid increases year by year, the network partition becomes an important measure to limit the short-circuit current of the receiving-end power grid. Through the analysis of the characteristics of the summary in Shaanxi, Gansu and Qinghai region typical 750/330 kV receiving-end power grid and considering main transformer units, main transformer capacity and line length factors, this paper constructs the receiving-end grid zoning equivalent model for single station independent power supply, two-station partition or three-station chain partition. Through the analysis of short-circuit current level of typical part
ISSN:1674-3415
DOI:10.7667/PSPC161653