基于虚拟阻抗的孤岛交流微电网混合储能控制策略研究

刘瑞明; 王生铁; 刘广忱; 温素芳

刘瑞明,王生铁,刘广忱,温素芳.基于虚拟阻抗的孤岛交流微电网混合储能控制策略研究[J].电测与仪表,2019,56(14):116-123.
Liu Ruiming,Wang Shengtie,Liu Guangchen,Wen Sufang.Research on Control Strategy of Hybrid Energy Storage System in Islanded AC Microgrid Based on Virtual Impedance[J].Electrical Measurement & Instrumentation,2019,56(14):116-123.

基于虚拟阻抗的孤岛交流微电网混合储能控制策略研究

Research on Control Strategy of Hybrid Energy Storage System in Islanded AC Microgrid Based on Virtual Impedance

DOI：10.19753/j.issn1001-1390.2019.014.019

中文关键词: 混合储能虚拟阻抗动态功率分配分布式控制

英文关键词:hybrid energy storagesystem virtual impedance dynamic power sharing distributed control

基金项目:国家自然科学(51767019)(51867020)；内蒙古自治区自然科学(2016MS0504)；内蒙古自治区高等学校科学研究项目(NJZY18091).

作者中文名	作者英文名	单位
刘瑞明	Liu Ruiming	内蒙古工业大学能源与动力工程学院
王生铁	Wang Shengtie	内蒙古工业大学能源与动力工程学院
刘广忱	Liu Guangchen	内蒙古工业大学电力学院
温素芳	Wen Sufang	内蒙古工业大学电力学院

摘要点击次数: 1324

中文摘要:

为了实现孤岛交流微电网(AC-MG)混合储能系统(HESS)的分散控制,提出了一种基于虚拟阻抗的针对超级电容(SC)和蓄电池(Battery)构成的HESS功率动态分配方法。在不需要实时检测负载功率的情况下实现两种类型储能设备的功率实时动态分配。在分析虚拟阻抗基本原理并建立HESS等效电路模型的基础上,推导了HESS动态功率分配的理论原理。通过分析DC-AC变换器电压电流双环控制参数对于变换器输出阻抗和虚拟阻抗的影响,进而给出有益于功率分配的控制参数设置方法。在此基础上,建立了HESS的仿真模型,设计了2类典型的等效功率波动工况,深入分析HESS在各种工况下的运行特性。结果表明：在各种工况下,HESS都可以通过控制超级电容串联虚拟电容(VC)实现其补偿等效功率波动的高频部分；蓄电池串联虚拟电阻(VR)吸收功率波动的低频部分,动态功率自动分配有效实现,提高了系统的鲁棒性和可靠性。

英文摘要:

According to To realize the distributed control of the hybrid energy storage system (HESS) in an island AC microgrid (AC-MG), a dynamic HESS power sharing strategy based on the virtual impedance for the supercapacitor (SC) and the storage battery (Battery) is proposed. Dynamic power sharing of two kinds of energy storage devices can be realized without real-time measuring of load power. The theoretical principle of dynamic power sharing of HESS is derived based on the establishment of HESS equivalent circuit model. By analyzing the influence of the voltage and current double loop control parameters on the output impedance and the virtual impedance of the DC-AC converter, the method of setting the control parameters for power distribution is given. On this basis, a simulation model of HESS is established. Two typical equivalent power fluctuation conditions are designed, and the operation characteristics of HESS under various operating conditions are analyzed. The simulation results show that, under various working conditions, HESS can compensates the high frequency part of the equivalent power fluctuation by controlling the supercapacitor series virtual capacitor (VC), while the battery series virtual resistor (VR) absorbs the low frequency part of the power fluctuation, the dynamic power sharing is realized effectively, and the robustness and reliability of the system are improved.

查看全文查看/发表评论下载PDF阅读器

关闭