微网中分布式电源和多储能的协调控制策略  

Cooperative Control Strategy for Distributed Generations and Energy Storage Units in Microgrid

作　　者：何小良 章雷其[1] 谭海云 汪震[1] 辛焕海[1] 

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]杭州市供电局,杭州310007

出　　处：《电源学报》2016年第2期103-111,共9页Journal of Power Supply

基　　金：国家高技术研究发展计划(863计划)资助项目(2015AA050202);国家自然科学基金资助项目(51577168);浙江大学电气工程学院青年基金资助项目(自趋优海岛微电网半实物仿真示范平台)~~

摘　　要：通过分布式电源和储能的协调控制,微网并网运行时可参与电网调度,且在并网和孤网状态下都能够多模式运行。正常运行模式下负荷优先分配给分布式电源,当分布式电源最大输出功率小于负荷、系统出现功率缺额时,才由储能补偿缺额部分,减小储能损耗,提高微网运行的经济性。通过多运行模式的配合,使储能荷电状态维持在合理范围内,储能处于可充放状态,提高微网并网运行调度的灵活性和孤网运行的稳定性。针对微网中含有多个储能的情况,提出多储能协同控制算法,在满足分布式电源和储能协调控制要求的前提下,能够根据储能荷电状态偏差的变化,动态地调节各储能充放电功率,使其快速平滑地达到荷电量平衡。Through cooperative control for distributed generations and energy storage units, microgrid is dispatchable in grid-connected situation and can operate among three different modes in both grid-connected and islanded situation. To reducing losses of energy storage units and extending its lifetime in normal operation mode, loads prioritize shared by distributed generations. When distributed generations maximum output power is less than loads,energy storage units compensate for the system power shortage. Energy storage units state of charge can maintain in a reasonable range through transferring between different modes to improv the dispatching flexibility in grid-connected mode and the stability in islanded mode. When a number of energy storage units exist in a microgrid, a cooperative control algorithm is proposed, which can adjust the charging/discharging power of each unit, according to the state of charge to reach energy balance among energy storage units.

关 键 词：微网 协调控制 荷电状态 荷电量平衡 

分 类 号：TM732[电气工程—电力系统及自动化]