交直流互联电网的跨省输电功率可行域分析

Feasible domain analysis of interprovincial transmission power in AC/DC interconnected power grids

交直流互联电网的送受关系复杂,电网运行调控的约束众多,使得完全依赖人工经验来判断送受电计划调整空间的难度较大。为适应市场化交易对于跨省送受电计划调整提出的精细化要求,提出了一种跨省输电功率可行域的分析方法。首先,根据交直流互联电网的运行特点,对调度可行域所含的运行约束进行拓展建模。然后,构建跨省输电功率可行域模型,并采用有序顶点搜索法进行求解。最后,基于南方区域电网的实际运行场景展开算例分析,并利用全网调度优化模型的计算结果验证了跨省输电功率可行域的有效性。依据可行域的计算结果可以获知特定送受场景下跨省输电功率的限值范围,从而为中长期送受电计划校核调整提供参考依据。

The relationship between power transmission and reception in AC/DC interconnected power grids is complex,with numerous constraints on grid operation and regulation.Therefore,relying solely on manual expertise to assess the adjustment of power transmission and reception plans presents significant challenges.In response to the precise requirements of market-oriented transactions for adjusting interprovincial power transmission and reception plans,a method for analyzing the feasible domain of interprovincial transmission power is proposed.Firstly,based on the operational characteristics of AC/DC interconnected power grids,the modeling of operational constraints within the feasible scheduling domain is expanded.Subsequently,a model for the feasible domain of interprovincial transmission power is constructed,and solved using the ordered vertex search method.Finally,case studies are conducted based on the actual operational scenarios of the regional power grid in the south,and the effectiveness of the feasible domain for interprovincial transmission power is validated using the computational results of the entire network scheduling and optimization model.The calculation results of the feasible domain provide insight into the limit range of interprovincial transmission power under specific transmission and reception scenarios,thereby providing a reference basis for the verification and adjustment of medium to long-term power transmission and reception plans.