ABSTRACT

The safe and stable operation of the traditional power system has been tremendously affected by the large-scale integration of various renewable energy sources, which has tendency to deliver variable power. The coordinated operation of renewable energy sources has become a hot topic of research nowadays. Utilizing complementary characteristics of solar, wind, and pumped hydro, this paper presents a mixed-integer problem to find optimal scheduling of hydro plants to enhance the market profit. Considering the market schedule for the day ahead, a mathematical formulation has been developed for the operation of a hybrid system. For this problem, the pumping operation of the pumped storage plant has been done by using grid supply during low market price hours. The overall profit can be increased by using the stored energy when the market price is high. The mismatch in the demand and generation has been curtailed by including a penalty factor in the objective function. The results obtained depict reasonable improvement in terms of economic benefits when the coordinated operation suggested is utilized. The results show that the penalty cost has been reduced by a factor of $28\mathrm{\%}$, and profit earned during solar-wind alone was negative and whereas using the Solar-Wind-PSP system (SWPS) the profit has increased and was found to be approximately $29\mathrm{\%}$ of total revenue generated. The overall revenue saw an increase of nearly $38\mathrm{\%}$.

摘要

各种可再生能源的大规模整合极大地影响了传统电力系统的安全和稳定运行，这种趋势倾向于提供可变的电力。可再生能源的协调运行已成为当今研究的热点。利用太阳能，风能和抽水蓄能的互补特性，本文提出了一个混合整数问题，以找到水力发电厂的最佳调度方案，以提高市场利润。考虑到未来一天的市场时间表，已经为混合动力系统的运行开发了数学公式。对于这个问题，抽水蓄能电站的抽水运行是通过在低市场价格时段使用电网供电来完成的。当市场价格高时，可以通过使用存储的能量来增加总利润。通过在目标函数中包括惩罚因子，减少了需求和发电的不匹配。当使用建议的协调操作时，获得的结果显示出在经济利益方面的合理改善。结果表明，惩罚成本降低了$28\mathrm{％}$，仅在太阳风期间获得的利润为负，而使用Solar-Wind-PSP系统（SWPS）的利润有所增加，大约为 $29\mathrm{％}$产生的总收入。整体收入增长了近$38\mathrm{％}$。