摘要
微网中负荷的供电特性各异,这必将对分布式单元的调度以及微网的运行成本产生影响。提出了一种基于弹性负荷分时调度的微网能量管理策略。首先依据燃气轮机发电成本曲线及电网分时电价,与接入的较大容量储能设备ES2协同供电,减少微网对电网的依赖。其次根据各机组的发电成本函数,建立相应的数学模型,将优化目标转换为二次规划问题,利用内点法优化各机组的功率输出。然后根据用户负荷的不同供电特性,分别在三个调度区间上完成了弹性负荷的调度,并分析了不同比例的两类用户对需求侧负荷管理的影响。最后通过算例仿真,验证了所提控制策略的有效性,提高了微网运行的经济性和可靠性。
The power supply characteristics of the load have an impact on scheduling distributed energy and operation cost of the microgrid. A control strategy of microgrid energy scheduling based on the elastic load sub-period dispatch is proposed. Firstly, according to the generation cost profile of microgas turbine and the time of use price of power grid, a large capacity storage energy is integrated to combine power supply, which reduces the dependence on the power grid. Next, according to generation cost of DGs, their mathematical models are established, the optimization objective is converted to the quadratic programming problem, and the output power of DGs is optimized by the interior point method. Then concerning the different loads characteristics, this paper schedules two kinds of elastic load in three scheduling intervals, and also analyzes the effect on demand respond under different proportion of two types of users. Finally, the example simulation shows that the proposed control strategy is effective in ensuring the economic operation of the microgrid and enhancing the reliability of the system.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2018年第4期20-27,共8页
Power System Protection and Control
基金
国家自然科学基金项目(61673174
61773162)~~
关键词
微网
弹性负荷
分时电价
能量调度
经济运行
microgrid
elastic load
TOU price
energy scheduling
economic operation
