热电联供微电网动态修正的分层优化调度  

Hierarchical Optimal Scheduling With Dynamic Correction of Micro-grid Combined Heat and Power

作　　者：齐志远[1] 张如意 李晓文 王强 QI Zhiyuan;ZHANG Ruyi;LI Xiaowen;WANG Qiang(College of Electronic Information Engineering,Inner Mongolia University,Hohhot 010021,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古大学电子信息工程学院,内蒙古自治区呼和浩特市010021

出　　处：《中国电机工程学报》2022年第3期968-979,共12页Proceedings of the CSEE

摘　　要：热电联供微电网能够以较高的效率提供电能和热能,实现能源的级联利用,增加可再生能源的利用率。该文提出一种热电联供微电网优化分层调度策略实现微电网的经济可靠运行。在短期调度中,采用动态回馈修正方法避免机械设备频繁启停。在超短期调度中,利用附加惩罚成本方法减小由可再生能源和负荷在不同时间尺度下随机波动造成的功率偏差。将短期调度的优化结果作为超短期调度的约束,实现两个不同时间尺度优化调度的有效衔接。案例仿真结果表明,该文提出的热电联供微电网分层优化调度策略不仅能够避免微型燃气轮机频繁启停,减少其运行时间及燃料消耗,而且能够对微型燃气轮机与蓄电池进行合理调度,提高可再生能源利用率,可实现微电网在能量平衡前提下的经济运行。Micro-grid combined heat and power(MCHP)has high efficiency to supply thermal and electrical energy, and it can realize the cascade energy utilization as well as improve the utilization rate of renewable energy. In this paper, an optimal hierarchical scheduling strategy was proposed to realize economical and stable operation of the MCHP. A dynamic feedback correction method was put forward to avoid the mechanical equipment frequent switching between start-up and stop state in the short-term scheduling. An attached penalty cost method was adopted to reduce the power deviation caused by the random fluctuation of renewable energy and load with different time intervals in the ultra-short-term scheduling. The two scheduling with different time intervals were effectively connected by taking the optimization results of the short-term scheduling as the constraint on the ultra-short-term scheduling.A simulation case on the MCHP scheduling was done and the results showed that the proposed methods avoid frequent switching between start-up and stop states of the micro gas turbine(MGT). In addition, the operation time and the fuel consumption of the MGT were greatly decreased. Moreover,the battery and the MGT were adjusted reasonably to improve the utilization rate of renewable energy and achieve economic operation with the premise of energy balance of the MCHP.

关 键 词：热电联供微电网 分层优化调度 动态修正 附加惩罚成本 

分 类 号：TM61[电气工程—电力系统及自动化]