摘要
鉴于独立运行模式下,微网处于自给自足状态,内部会产生不平衡功率,为使供电更加经济可靠,提出了一套基于需求侧响应的实时调度策略。建立了计及负荷曲线平稳度和负荷转移成本双重指标的日前负荷转移规划模型,在需求侧转移部分可转移负荷平滑负荷曲线;微网运行期间,实施基于蓄电池三段式充放电的实时调度策略安排各可控型微源及蓄电池出力,有利于蓄电池保持足够的充放电裕量,进一步削减功率缺额及功率浪费。策略中建立负荷优化分配模型优化各可控型微源出力,减小微网运行成本。最后以一小型微网系统为例,通过与不计及蓄电池折旧成本的日前调度结果对比,证明在负荷转移平滑负荷曲线及实时调度策略的双重作用下,不平衡功率得以削减。
Due to microgrid island mode, the unbalanced supplies electricity by itself in power will be produced. In or der to make power supply more economical and reliable, a realtime scheduling strategy based on the demand side re sponse is put forward in this paper. Dayahead load transfer model, which considers such indexes as load curve smooth ness and load transfer cost, is built to smooth the load curve by transferable load at demandside transfer part. During the operation of microgrid, the realtime scheduling strate gy based on battery threestep charging and 'discharging is implemented to arrange each controllable microsource and battery output, which can maintain enough battery charging and discharging margin and cut down the power shortage and power waste. Moreover, the optimal load distribution model is proposed in the dispatch scheme to optimize theoutput of the controllable microsource, reduce the micro grid operation cost. In the end, taking a small microgrid system as an example, by comparing with the dayahead planning results without considering the battery depreciation cost, it is shown that the unbalanced power can be reduced under both functions of load curves smoothening by load transfer and the realtime scheduling strategy.
出处
《现代电力》
北大核心
2015年第4期12-18,共7页
Modern Electric Power
基金
中央高校基本科研业务费专项资金资助(2014MS138)
关键词
独立运行
负荷转移
三段式
实时调度
不平衡功率
operation in island mode
load transfer
three-step
real-time schedule the unbalanced power