一种新的多省区电网协调运行生产模拟方法  

A new production simulation method for coordinated operation of multi-provincial power grid

作　　者：傅旭 FU Xu(Northwest Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Xi’an 710075,China)

机构地区：[1]中国电力工程顾问集团西北电力设计院有限公司,陕西西安710075

出　　处：《电力自动化设备》2020年第12期166-171,共6页Electric Power Automation Equipment

摘　　要：多省区电网的生产模拟在理论上可将多个省区合并为一个地区统一进行优化,且存在最优解,但不符合我国以省为实体的电网调度运行模式,导致火电机组开机不均衡、联络线功率波动大等问题。为此,提出一种适用于我国调度体制的多省区电网生产模拟方法。将多省区联合生产模拟问题分解成单省区独立运行、多省区协调运行2个子问题。在独立运行子问题中,求解各省区独立运行方式下与外部电网的逐时功率交换曲线;在协调运行子问题中,求得以新能源弃电最小为目标函数的协调运行方式,考虑省区间联络线交换功率约束、各省区可提供的正向/负向调节能力约束等。该模型既保证了各省区独立性,又保证了各省区电力的互济性,避免了各省区开机规模不均等问题。我国西北五省区实际电网的仿真算例验证了所提方法的有效性。In theory,the production simulation of multi-provincial power grid can combine multiple provinces into one region for optimization,and there is an optimal solution.However,it does not conform to the scheduling and operation mode of China’s power grid with province as the entity,which leads to the problems of thermal power generation unbalance,high power fluctuations of tie-line,and so on.To this end,a production simulation method of multi-provincial power grid is proposed,which is suitable for China’s scheduling system.The joint production simulation problem of multiple provinces is decomposed into single province’s independent operation sub-problem and multiple provinces’coordinated operation sub-problem.In the independent operation sub-problem,the hourly exchanged power curve of each province with the external power grid is solved.In the coordinated operation sub-problem,the coordinated operation mode with the minimum abandoned electricity of new energy as the objective function is obtained,considering the constraints of the exchanged power of tie-line among provinces,the positive and negative regulation capacity provided by each province.The model not only ensures the independence of each province,but also ensures the mutual aid of electricity among provinces,avoiding the problem of unbalanced start-up generators of each province.The effectiveness of the proposed method is verified by the simulation of the actual power grid of five provinces in Northwest China.

关 键 词：多省区电网 生产模拟 协调运行 弃电率 

分 类 号：TM743[电气工程—电力系统及自动化]