应对大功率缺失的分-省协调实时调度模型

Region-province coordinated real-time dispatch model considering large-scale power loss

针对大功率交直流联络线故障将导致受端电网大规模功率缺失,而省域电网内部分机组由省级电网调度,另一部分由区域分中心调度等问题,研究分-省两级电网调度中心实时发电计划协调调整策略。首先建立了省调机组/直调机组有功调整量分配模型和出力跟踪校验模型。针对省调机组/直调机组可能无法完全跟踪分配到的有功调整量的情况,进一步提出了省调机组/直调机组有功协调策略及出力校正模型,形成了一套适用于省域电网大功率缺失场景的省调机组/直调机组实时发电计划协调编制方法。仿真结果表明,与常规实时调度方法相比,该方法有助于快速恢复省域电网大功率缺失后的有功平衡。

Failure of high-power AC/DC tie-line will lead to large-scale power loss in the receiving-end power grid,and a part of the provincial units are dispatched by the provincial power grid(P-Units),the other part is dispatched by the regional grid(R-Units).In view of the above problems,the coordinated adjustment strategy of real-time generation plan for regional and provincial dispatching units is studied.Firstly,the models for the allocation of active power adjustment and output tracking between P-Units and R-Units are constructed.For the cases that P-Units or R-Units might not be able to track the allocated active power adjustment,a coordination strategy for active power of P-Units and R-Units is proposed,followed by an output correction model.Together,a set of real-time scheduling methods coordinated P-Units and R-Units which are suitable for provincial power grid under large power loss are formed.Simulation result shows that compared with conventional real-time scheduling method,the proposed method is conducive to fast recovery of provincial grid active power balance after large-scale power loss.