含机组组合的短期水火储联合最优经济调度

The Short-term Optimal Economic Dispatch for Hybrid Hydro-thermal and Pumped-storage System with Unit Commitment

为研究抽水蓄能给水火联合调度系统带来的影响,提出了新的含机组组合的水火储联合最优经济调度模型,采用GAMS中含分支-定界法的求解器对模型进行求解,仿真验证了所述模型的有效性和可行性。结果表明:所建模型可充分利用水力资源发电,缓解火电的调峰压力;并根据抽水储能的抽水发电特性实现了对火电机组的削峰填谷的作用,在改善火电运行条件的同时,平滑火电出力,减少污染气体的排放,提高整个电力系统运行的稳定性、经济性和环保性。同时,为进一步研究储能对电力系统的影响具有一定的借鉴作用。

In this paper, to study the impact of pumped stor- age on hydro-thermal joint scheduling system, a new optimal economic dispatch model for hydro-thermal and pumped storage joint system is proposed, and it can be solved by u- sing hybrid GAMS and branch-bound method. Simulation is carried out to verify the feasibility and validity of the mod- el. The results show that this model can take advantage of hydro power resources, and relieve pressure on thermal power during peak period. In addition, according to charac- teristics of pumped-storage power generation, peak load shifting for thermal power unit can be realized to improve operation conditions of thermal power unit, to smooth ther- mal power output curves, to reduce emissions of pollution gases, and to ultimately improve the stability, economy and environmental protection of entire power system. At the same time, it also has certain reference for studying the ira-pact of energy storage on the power system.