城市电网分区柔性互联选址方法及示范应用

doi:10.3969/j.issn.1000-7229.2016.05.016

摘要/Abstract

摘要：

在城市电网分区间，利用柔性直流电力电子装置，实现柔性互联，有可能解决现有交流型城市电网分区运行中存在的难题。介绍了国内外首个城市电网分区柔性互联示范工程的选址，并提出一种实用的选址方法。首先，建立了分区间柔性互联装置选址模型，计及了静态安全性、供电能力、短路电流、电压稳定等7项指标。由于电压稳定等指标计算需要逐个case模拟故障仿真，对于大型城市电网柔性互联选址的计算量很大，模型很难直接求解，因此提出一种实用的选址方法：先给出分区有功需求及无功需求初筛指标，依据其进行方案初筛；再进一步详细仿真分析得到7项细筛指标；然后采用层次分析法确定最优方案，最后介绍了示范工程的选址论证。结果表明，所提方法确定的选址方案具有很好的互联效果，发现了除示范工程外更多效果良好的位置，为后续柔性互联提供了选择。同时，研究发现不是所有分区柔性互联后都具有明显效果，故进一步归纳了适合柔性互联的分区特征。所提方法和实践对城市电网分区柔性互联的发展具有重要意义。

关键词: 城市电网, 分区, 柔性直流, 柔性互联, 选址

Abstract:

The partition operation problem of existing AC urban power grid can be probably solved by applying flexible DC electronic devices for flexible interconnection. This paper introduces the siting of the first flexible interconnection demonstration application of urban power grid partition at home and abroad and proposes a practical siting method. Firstly, we construct a siting model of flexible interconnection device in partition with considering 7 parameters such as static security, power capability, short-circuit current, power stability, etc. Since index calculation such as the power stability requires a series of case fault simulation, the amount of calculation will be too huge for flexible interconnection siting in big cities, and the model is difficult to solve directly. Therefore we present a practical siting method. Firstly, we give the active and reactive power demand indexes of partition for the preliminary screening of schemes, and further obtain seven screening indies through detailed simulation analysis. Then we adopt analytic hierarchy process to determine the optimal scheme. Finally, we introduce the siting discussion of demonstration application. The results show that the siting scheme determined by the proposed method has good interconnection effect. And the method finds more good sites in addition to the demonstration project location, which can provide more than one choice for following interconnection projects. Meanwhile, the study shows that not all the flexible interconnections can bring obvious effects. Therefore the distribution features suitable for flexible interconnections are concluded. The proposed method and practice in this paper are of great significance to the development of partition flexible interconnection for urban electric power.

Key words: urban power grid, partition, flexible DC, flexible interconnection, siting

中图分类号:

TM 727

肖峻，李思岑，黄仁乐，李蕴，韩帅. 城市电网分区柔性互联选址方法及示范应用[J]. 电力建设, 2016, 37(5): 10-20.

XIAO Jun，LI Sicen，HUANG Renle，LI Yun，HAN Shuai. 1. Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China；2. State Grid Beijing Electric Power Company, Beijing 100031, China[J]. Electric Power Construction, 2016, 37(5): 10-20.

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