1．天津市电力科学研究院，天津市 和平区 300022；2．天津市电力公司，天津市 河北区 300010

论述了天津电网分区供电的必要性和分区供电方案的计算分析方法，结合天津电网“十一五”期间500 kV和220 kV输变电工程的建设项目，重点研究了2009年天津500 kV/ 220 kV电磁环网的运行方式，通过计算和分析电网的电力平衡关系、短路电流、潮流并进行稳定校核，指出了电磁环网运行存在的问题，提出了分区供电方案，并对天津电网的网架规划和建设过程中存在的问题提出了建议，以期为天津电网“十一五”期间的分区供电研究工作提供参考。

天津电网   电网规划   电网分区   电磁环网   短路电流   潮流计算

The necessity of power grid partitioning based power supply as well as the calculation and analysis methods for partitioning based power supply schemes are discourse upon in this paper. Combining with the construction items of 500 kV and 220 kV power transmission and transformation project of Tianjin power grid during the 11th Five-Year Plan, the 500/220 kV electromagnetic coupled operation modes of Tianjin power grid in the year of 2009 are emphatically researched. By means of the calculation and analysis on the power balance of the power grid, short circuit currents and power flows as well as stability verification, the existing problem in the electromagnetic coupling operation modes are pointed out, thus the partitioning based power supply schemes are proposed and corresponding suggestions on the problems in the network planning and construction process of Tianjin power grid are given. These suggestions could be available for reference in the partitioning based power supply of Tianjin power grid during the 11th Five-Year Plan.

Tianjin power grid   power network planning   network partitioning   electromagnetic coupled networks   short circuit current   power flow calculation