稳定性约束的电网输电能力及其提升措施

输电能力是电网重要性能指标,评估和提升输电能力是电网规划和运行阶段共同关注的重点。约束输电能力的因素众多,针对其中的稳定性约束,提出了输电能力的定义,梳理了约束输电能力的稳定形态及其典型场景,指出了考核标准及适用评估方法并分析了主要影响因素,厘清了规划与运行两个阶段输电能力评估结论产生差异的原因;从改善电网固有属性以及提升电网特性认知水平两个方面,提出了提升电网输电能力的措施。

Stability constraints of power grid transmission capacityand its improvement measures

Transmission capacity is an important performance index of the power grid, which is thekey point of the grid planning and operation stage. There are many conditions to constraint the trans-mission capacity, the definition of transmission capacity is proposed, which is based on the constraintof power grid stability. The constrained stability forms and typical scene are combed and then theassessment criteria and the applicable evaluation method are pointed out and main influencing factorsare analyzed. On this basis, the reasons for the difference of transmission capacity evaluation betweenthe two stages of planning and operation are clarified. Finally, the measures to improve the transmis-sion capacity of power grid are proposed from two aspects: improving the inherent properties of thepower grid and improving the cognitive level of the characteristics of the power grid.