采用可控负荷平滑光伏发电功率波动的需求响应策略  

Demand Response Strategies for Smoothing Power Fluctuation of Interconnecting ties in the Micro-Grid with Controllable Load

作　　者：李卫良[1] 黄堃[1] 陈璐[1] 杨永标[1] 

机构地区：[1]国网电力科学研究院,江苏南京210008

出　　处：《江苏电机工程》2014年第2期40-43,共4页Jiangsu Electrical Engineering

摘　　要：针对以储能来消减屋顶光伏为主的区域微电网的功率波动这一常用方法,提出以需求响应资源来平抑微电网功率波动的实现,以期在高渗透率情况下,实现少用储能甚至不用储能来平滑微电网联络线节点对配网造成的功率波动。该方法包括日前计划和实时调节两个层次,也就是在日前预测间隙性光伏发电的情况,拟定好日前计划,设定好可调节负荷的功率曲线,以适应光伏发电的变化波动;实时调节就是在实时的情况,利用可中断负荷来响应光伏功率的瞬间突变,在实时调节过程中,主要处理好实时调节的测量时间精度。通过可调节负荷的日前计划安排和可中断负荷的实时调节,充分利用需求响应技术,从2个层面平滑光伏发电功率的缓慢变化和瞬间突变引起的功率波动。Energy storage technology is the principal tool to smooth power fluctuation produced by roof PV in regional micro-grid. In this paper, demand-side resource is takne as a tool to smooth power fluctuation in microgrid, so as to decrease the energy-storage capacity in a high PV penetration rate situation. The method includes two levels which are day-ahead plan and real-time control. The day-ahead plan includes prediction of intermittently photovoltaic power generation and presetting power curve of controllable load such as central air conditioners and other loads with slow rate of power change. It is for handling the change of photovoltaic power generation. The real-time control is to use the interruptible load to response to instant fluctuation of photovoltaic power. The measuring precision is the critical factor in the real-time control process. Through the day-ahead plan for controllable load and the real-time control on interruptible load, the power fluctuation caused by slow change or instant change of photovoltaic power generation could be effectively eliminated with taking the full advantages of demand response technology.

关 键 词：联络线功率控制 微电网 需求响应 平滑波动 可控负荷 

分 类 号：TM615[电气工程—电力系统及自动化]