考虑连续调度周期调峰约束的风光水火多能源短期优化调度

Short-term optimal scheduling of multi-energy considering continuous dispatching cycle peak-shifting constraints

新能源出力的随机性和反调峰特性增大了系统经济稳定运行的压力。为克服风光等新能源并网带来的调峰难题,并协调风、光、水、火的发电调度,构建了一种考虑连续调度周期调峰约束的多能源优化调度模型。以系统运行能耗量最小作为目标,建立风、光、水、火4种能源形式的多种耦合运行约束,并针对新能源出力的不确定性以及传统火电机组运行惯性较大的问题,构建了连续调度周期负荷高峰的备用约束、低谷弃风约束和弃光约束。为减轻系统的经济性以及容量冗余问题,提出经济性排序的方法,并引入火电机组最大启动台数约束。结合具体算例进行仿真分析,结果表明所提短期优化调度模型能够保证系统运行的经济性和调峰的可行性。

The randomness and reverse peak regulation characteristic of the new energy power generation increase the pressure of economic and stable operation of the system.In order to overcome the problem of peak regulation caused by the grid connection of new energy sources,and coordinate the power generation scheduling of wind,light,water and fire,a multi-energy optimal scheduling model was proposed considering the constraints of continuous dispatching cycle peak regulation.Taking the minimum system operation energy consumption as the optimization objective,multiple coupling operation constraints of wind,light,water and fire are established.In view of the uncertainty of new energy output and the large operation inertia of traditional thermal power units,the reserve constraints of continuous dispatching cycle load peak,the constraints of wind abandonment at valley and light abandonment were constructed.In order to reduce the economic problem of the system and the capacity redundancy problem of thermal power units,the method of economic ranking is proposed and the constraint of the maximum number of thermal power units is introduced.Simulation analysis is performed with specific calculation cases,the simulation results show that the proposed model of short-term optimization can guarantee the economy and stability of power system operation.