微電網(wǎng)混合儲(chǔ)能功率分頻控制策略研究
邵永明，張朝川，尹泰康
（河北工業(yè)大學(xué) 電磁場與電器可靠性省部共建重點(diǎn)實(shí)驗(yàn)室，天津 300130）
摘 要：針對(duì)獨(dú)立光伏發(fā)電系統(tǒng)中混合儲(chǔ)能方式能夠同時(shí)具有高功率密度和高能量密度的特性，提出一種微電網(wǎng)混合儲(chǔ)能功率分頻控制策略來提高系統(tǒng)運(yùn)行的穩(wěn)定性。通過Simulink 平臺(tái)搭建了獨(dú)立光伏發(fā)電混合儲(chǔ)能系統(tǒng)，通過對(duì)功率分頻實(shí)現(xiàn)了超級(jí)電容器和鋰離子電池的功率輸出優(yōu)化分配，抑制了由于負(fù)荷突變引起的功率波動(dòng)，維持了直流母線電壓的穩(wěn)定。仿真結(jié)果表明，該方法提高了系統(tǒng)的穩(wěn)定性，實(shí)現(xiàn)了對(duì)直流負(fù)載的可靠供電。
關(guān)鍵詞：獨(dú)立光伏發(fā)電；混合儲(chǔ)能；鋰離子電池；超級(jí)電容器
中圖分類號(hào)：TM615 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2016)09-0012-04
Study on Control Strategy of Power Fractional Frequency with
Hybrid Energy Storage of Microgrid
SHAO Yong-ming, ZHANG Chao-chuan, YIN Tai-kang
（Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, China）
Abstract: In allusion to that hybrid energy storage system (HESS) possesses the advantages of high power density and high energy density simultaneously in the stand-alone photovoltaic power generation system, this paper proposed a kind of control strategy of power fractional frequency with hybrid energy storage of microgrid to improve the stability of the system operation. A HESS for stand-alone photovoltaic power generation system was built by simulink. Via power fractional frequency, the system realized the optimal allocation of power output of supercapacitor and lithium ion battery, suppressing the power fluctuation caused by load change and maintaining the stable DC bus voltage. The simulation results show that this method improves the system stability and realizes the reliable power supply for direct current load.
Key words: stand-alone photovoltaic power generation; hybrid energy storage; lithium-ion battery; ultracapacitor
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