计及新能源消纳的多级调度计划协调决策方法

Coordination Decision Method of Multi-level Dispatching Plan Considering Renewable Energy Accommodation

构建以新能源为主体的新型电力系统是碳中和、碳达峰的重要举措。针对新能源具有的独特特性与成本模式,在当前中国大电网多级调度计划协调编制模式中,为避免国分调在编制跨区跨省联络线计划时基于电力交易而较少考虑省网约束,可能导致的省网计划无法收敛而需要反复流转修改,文中设计了一种“自下而上”的多级调度计划编制方案。考虑新能源消纳情况,将联络线计划作为可调的决策变量,同时考虑运行约束,建立省网外送或受入的极限能力分析模型,求解获得联络线计划的边界条件。最终得到国分调据此边界条件编制满足省网约束的联络线计划。并以实际电网算例对所提方法的有效性进行了验证。

Building a new power system with renewable energy as the main body is an important measure for carbon neutralization and carbon peaking.Aiming at the unique characteristics and cost model of renewable energy,in the current multi-level dispatching plan coordination mode of large power grid in China,a bottom-up multi-level dispatching plan preparation scheme is designed in order to avoid the lack of consideration of provincial grid constraints based on power transactions in the preparation of cross-regional and cross-provincial tie-line plans,which may lead to the convergence of provincial grid plans and require repeated circulation and modification.Considering the renewable energy accommodation,the tie-line plan is taken as an adjustable decision variable,and considering the operation constraints,the limit capacity analysis model of provincial network transmission or acceptance is established to solve the boundary conditions of the tie-line plan.Finally,according to the boundary conditions,the tie-line plan meeting the provincial network constraints is compiled.The effectiveness of the proposed method is verified by an actual power grid example.