1.国网重庆市电力公司经济技术研究院;2.国网重庆市电力公司;3.重庆大学
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1.State Grid Chongqing Economic Research Institute;2.State Grid Chongqing Electric Power Company;3.Chongqing University
电力系统联络线功率交互能力的精准表征，有助于实现我国跨区电力传输的可执行性和最优性。然而，现有方法仅考虑基态场景电力系统联络线功率交互能力，忽略N-1故障场景对电力系统联络线功率交互能力的影响，无法实现联络线功率交互能力的精准表征。本文针对计及N-1约束的电力系统联络线功率交互能力展开研究。首先，依据基态场景与N-1故障场景的耦合关系，提出基于解耦表征策略的N-1故障场景下电力系统联络线功率交互能力快速刻画方法。进而，依据火电机组不同调控模式，分析N-1故障场景调控能力对电力系统联络线功率交互能力影响，辅助跨区电力资源优化配置决策制定。我国某省661节点系统算例表明：所提方法中能够精准、高效地表征联络线功率能力。
A good description of the power system tie-line power transfer capability facilitates the feasibility and optimality of cross-region power exchanges. However, the existing methods only consider the base scenario while N-1 contingencies are ignored, leading to inaccurate determination of the regional tie-line power transfer capability. Consequently, this paper focused on the power system tie-line exchange capability considering N-1 contingencies. First, based on the coupling relationship between the base scenario and N-1 contingencies, this paper developed a strategy to quickly determine the power system tie-line power transfer capability by decomposition. Furthermore, the impacts of units’ different control modes on the power system tie-line exchange capability considering N-1 contingencies are analyzed, facilitating the optimal allocation of cross-region power exchanges. The accuracy and effectiveness of the proposed methods are demonstrated in a provincial utility system.
