昆明北部片区电网网架优化方案研究

Study on Network Frame Optimization in North Kunming Power Grid

昆明电网作为云南电网的负荷中心,由于网内电源装机容量较小,负荷供电主要依靠线路输送及主变下网,因此主变容量及线路输送能力成为电网供电的关建因素。昆明北部片区电网的接入电源占全市电网比例较重,片区电网负荷和电源分布不平衡引起的局部片区送出受阻问题日趋严重。另外,随着近区500 kV变电站计划投产,昆明北部片区的电磁环网形态日益复杂。本文以昆明北部片区电网现有网架结构为基础分析电网送出受阻情况,并对电磁环网变化影响进行研究,最终提出满足昆明北部片区电力送出及安全运行的网架优化方案,为解决昆明北部片区电网送出问题及潜在运行风险提供决策参考。

Kunming power grid is the main load centre of Yunnan power grid,with low installed capacity but high load.So transformer capacity and line transfer capacity is the key of power supply.The generation capacity of North Kunming power grid is more proportional among the Kunming power grid.The limitation of power supply becomes increasingly serious for the unbalance of supply and demand.And the related power grid structure becomes increasingly complex for the new substation operating.This paper analyzed power supply limitation and electromagnetic loop network of North Kunming power grid,which based the present power gird structure,and proposed the solution of network frame optimization.It provides a useful reference for power grid department to solve transmission problem and the long-term potential operation risk of North Kunming power grid.