电力系统设备停电是影响电力系统可靠性和经济性的重要因素之一,因此考虑规划问题中可能发生的设备故障是至关重要的.传统的N-1安全校验准则并未引入设备故障率,因此过于保守,虽然满足了可靠性,但可能会导致过多的发输电资源浪费.本文提出了一种新的发电扩展规划(GEP)模型,该模型以投资、运行、备用和可靠性成本最小为原则,同时规划候选发电机组和储能系统.该模型采用失负荷单价(VOLL)与期望缺供电量(EENS)相乘的算式计算可靠性成本,在经济性和可靠性之间进行了成本效益的折中.由于EENS的计算是整个模型的主要计算障碍,传统EENS算式中包含大量0-1变量与连续变量,线性化过程及其繁琐,本文提出了一种新的线性化EENS表达式方法,并将其应用于本文提出的GEP模型中.由IEEE-RTS系统验证了新模型的有效性和优越性,通过算例验证了该方法的效果,EENS的计算效率有了明显的提高,同时解的精度仍然十分理想.“,”Power system equipment outages are one of the most important factors affecting the reliability and economy of power systems.It is crucial to consider the reliability of the planning problems.In this paper,a generation expansion planning(GEP)model is proposed,in which the candidate generating units and energy storage systems(ESSs)are simultaneously planned by minimizing the cost incurred on investment,operation,reserve,and reliability.The reliability cost is computed by multiplying the value of lost load(VOLL)with the expected energy not supplied(EENS),and this model makes a compromise between economy and reliability.Because the computation of EENS makes the major computation impediment of the entire model,a new efficient linear EENS formulation is proposed and applied in a multi-step GEP model.By doing so,the computation efficiency is significantly improved,and the solution accuracy is still desirable.The proposed GEP model is illustrated using the IEEE-RTS system to validate the effectiveness and superiority of the new model.