电工技术学报2017，Vol.32Issue(15)：169-179,11.DOI:10.19595/j.cnki.1000-6753.tces.161151
风光储微电网并网联络线功率控制策略
Tie-Line Power Flow Control Strategy for a Grid-Connected Microgrid Containing Wind, Photovoltaic and Battery
摘要
Abstract
In an active distribution network environment,the intermittent and random renewable generation units,such as small wind generation,photovoltaic (PV),and energy storage unit,e.g.battery,can be combined to form a microgrid (MG).The microgrid can be controlled as a generator or a load with a timed constant power flow by coordinating the power output of its multiple renewable generation units.This way is helpful for the active distribution network to dispatch and manage the microgrid group and to promote the penetration of distributed renewable energy sources.A hierarchical coordination control strategy is employed by considering the change of wind speed and solar radiation intensity as well as the limited storage capacity.A method to calculate the expected interchange power plow of the microgrid tie-lineaccording to predicted wind speed and solar radiation intensity in each time period is presented.A central controller is designed to formulate the plan of microgrid tie-line interchange power plow with the dispatch center of the active distribution network by communicating with upper active distribution grid center.The central controller can also select the correct operation modes and achieve the smooth switch between different operation modes,to select and manage the local controllers.The hierarchical control strategy realizes the seamless transformation of the running state,and ensures the output power flow of the microgrid to follow the demand of the tie-line interchange power.When the difference between the sum of output instantaneous power of wind generation,PV in the microgrid and tie-line interchange power plow is big,the microgrid may partly abandon the generation active power of wind and PV power generation.A simulation model of wind/PV/battery microgrid is established and the simulation results confirm the effectiveness of the proposed control strategy.关键词
风光储微电网/联络线功率分时恒定/分层协调控制/中心控制器/底层控制器Key words
Wind/PV/battery microgrid/timed constant power flow of microgrid tie-line/hierarchical coordination control/center controller/local controller分类
信息技术与安全科学引用本文复制引用
肖朝霞,贾双,朱建国,樊世军..风光储微电网并网联络线功率控制策略[J].电工技术学报,2017,32(15):169-179,11.基金项目
国家自然科学基金(51577124)、天津市重点基金(15JCZDJC32100)和天津市科技支撑计划重点项目(15JCZDJC32100)资助. （51577124）
