CAJ | 학술논문

为优化电动汽车(electric vehicle，EV)充电方案，降低充电成本，在机组组合模型(unit commitment，UC)的基础上，提出了电动汽车最优充电模型。针对该模型，提出基于最小边际成本的近似求解算法，根据UC结果计算各调度时段的边际发电成本，优先调度EV在平均边际发电成本最小的区间充电。若现有开机机组不能满足EV的充电需求，则按照新增发电成本最低的原则优先开启满负荷状态下平均耗费最低的机组。以上过程迭代进行，直至所有EV充电完毕。仿真结果验证了该模型及求解算法的有效性，此外，算例分析表明，EV平均充电成本随EV渗透率的提高而增加，且快充模式对应的充电成本最低。
위우화전동기차(electric vehicle，EV)충전방안，강저충전성본，재궤조조합모형(unit commitment，UC)적기출상，제출료전동기차최우충전모형。침대해모형，제출기우최소변제성본적근사구해산법，근거UC결과계산각조도시단적변제발전성본，우선조도EV재평균변제발전성본최소적구간충전。약현유개궤궤조불능만족EV적충전수구，칙안조신증발전성본최저적원칙우선개계만부하상태하평균모비최저적궤조。이상과정질대진행，직지소유EV충전완필。방진결과험증료해모형급구해산법적유효성，차외，산례분석표명，EV평균충전성본수EV삼투솔적제고이증가，차쾌충모식대응적충전성본최저。
To optimize electric vehicle (EV) charging schedule and minimize charging costs, a formulation was presented on the basis of unit commitment (UC) results. An approximate algorithm based on minimum marginal cost was proposed to solve the formulation. Hourly marginal generation cost was calculated based on the UC results, and EVs were dispatched to be charged over the period with the minimum average marginal generation costs in priority. If present committed units failed to charge all EVs, extra units should be started for charging EVs in ascending order of unit average full-load cost (AFLC) for minimizing extra generation costs due to the newly started unit. The process described above was repeated until all EVs were scheduled. Simulation results validate the proposed methodology. The simulation results demonstrate that EV average charging cost increases with EV penetration level and the charging cost of fast charging mode is minimum.