以光伏发电并网系统为研究对象,提出一种新型储能型开关升压并网变换器。通过建立小信号模型,对系统中的储能型开关升压网络进行分析,该系统共包含3个功率单元：光伏组件、储能型开关升压网络和并网逆变器。为最大程度地利用太阳电池能量,利用扰动观测法对最大功率点进行跟踪。同时建立能量管理策略,对3个功率单元的能量流动进行控制,可提高能量利用率、增强系统的稳定性。仿真和实验验证了该拓扑结构的优越性以及储能策略的可行性。
Abstract
Taking photovoltaic power generation grid-connected system as the research object, this paper proposes a new type of energy storage switched boost grid-connected converter. By establishing a small signal model, the energy storage switched boost network in the system is analyzed. The energy storage switched boost network has the advantages of high gain and no dead zone. At the same time, the energy storage battery can be charged/discharged by controlling the through duty cycle. The system includes three power units： photovoltaic cells, energy storage switched boost network and grid-connected inverter. In order to maximize the use of photovoltaic cell energy, the disturbance observation method is used to track the maximum power point. At the same time, an energy management strategy is established to control the energy flow of the three power units, which improves the energy utilization rate and enhances the stability of the system. Simulations and experiments verify the superiority of the topology and the feasibility of the energy storage strategy.
关键词
最大功率点跟踪 /
DC-DC变换器 /
储能 /
并网逆变器 /
光伏发电
Key words
maximum power point trackers /
DC-DC converters /
energy storage /
grid-connected inverters /
PV power generation
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 陈炜, 艾欣, 吴涛, 等. 光伏并网发电系统对电网的影响研究综述[J]. 电力自动化设备, 2013, 33(2): 26-32, 9.
CHEN W, AI X, WU T, et al.Review on the impact of photovoltaic grid connected power generation system on power grid[J]. Power automation equipment, 2013, 33(2): 26-32, 9.
[2] SUBUDHI B, PRADHAN R.A comparative study on maximum power point tracking techniques for photovoltaic power systems[J]. IEEE transactions on sustainable energy, 2013, 4(1): 89-98.
[3] 丁新平, 卢燕, 钱照明, 等. Z源逆变器光伏并网系统太阳电池MPPT和逆变器并网的单级控制[J]. 电工技术学报, 2010, 25(4): 122-128, 41.
DING X P, LU Y, QIAN Z M, et al.Z-source inverter photovoltaic grid-connected system photovoltaic cell MPPT and inverter grid-connected single-stage control[J]. Transactions of the China Electrotechnical Society, 2010, 25(4): 122-128, 41.
[4] FOROUZESH M, SIWAKOTI Y P, GORJI S A, et al.Step-Up DC-DC converters: a comprehensive review of voltage-boosting techniques, topologies, and applications[J]. IEEE transactions on power electronics, 2017, 32(12): 9143-9178.
[5] 童亦斌, 吴峂, 金新民, 等. 双向DC/DC变换器的拓扑研究[J]. 中国电机工程学报, 2007, 27(13): 81-86.
TONG Y B, WU G, JIN X M, et al.Research on the topology of bidirectional DC/DC converters[J]. Proceedings of the CSEE, 2007, 27(13): 81-86.
[6] GE B, ABURUB H, PENG F Z, et al.An energy-stored quasi-Z-source inverter for application to photovoltaic power system[J]. IEEE transactions on industrial electronics, 2013, 60(10): 4468-4481.
[7] PENG F Z.Z-source inverter[J]. IEEE transactions on industrial applications, 2003, 39(2): 504-510.
[8] 屈艾文, 陈道炼, 苏倩. 新颖的单级三相电压型准Z源光伏并网逆变器[J]. 中国电机工程学报, 2017, 37(7): 2091-2101.
QU A W, CHEN D L, SU Q.Novel single-stage three-phase voltage type quasi-Z source photovoltaic grid-connected inverter[J]. Proceedings of the CSEE, 2017, 37(7): 2091-2101.
[9] 刘硕, 王云昊, 杨立永. 开关升压变换器在光伏发电系统中应用的研究[J]. 太阳能学报, 2020, 41(6): 272-277.
LIU S, WANG Y H, YANG L Y.Research on the application of switching boost converter in photovoltaic power generation system[J]. Acta energiae solaris sinica, 2020, 41(6): 272-277.
[10] NAG S S, MISHRA S.Current-fed switched inverter[J]. IEEE transactions on industrial electronics, 2014, 61(9): 4680-4690.
[11] ESRAM T, CHAPMAN P L.Comparison of photovoltaic array maximum power point tracking techniques[J]. IEEE transactions on energy conversion, 2007, 22(2): 439-449.
[12] SAFARI A, MEKHILEF S.Simulation and hardware implementation of incremental conductance MPPT with direct control method using cuk converter[J]. IEEE transactions on industrial electronics, 2011, 58(4): 1154-1161.
[13] 李媛, 彭方正. Z源/准Z源逆变器在光伏并网系统中的电容电压恒压控制策略[J]. 电工技术学报, 2011, 26(5): 62-69.
LI Y, PENG F Z.Capacitor voltage constant voltage control strategy of Z-source/quasi-Z-source inverter in photovoltaic grid-connected system[J]. Transactions of the China Electrotechnical Society, 2011, 26(5): 62-69.
[14] INDU R B, SARAVANA I G, NAGAMANI C.Control strategy for power flow management in a PV system supplying DC loads[J]. IEEE transactions on industrial electronics, 2013, 60(8): 3185-3194.
[15] 邱培春, 葛宝明, 毕大强. 基于蓄电池储能的光伏并网发电功率平抑控制研究[J]. 电力系统保护与控制, 2011, 39(3): 29-33.
QIU P C, GE B M, BI D Q.Research on power stabilization control of photovoltaic grid-connected power generation based on battery energy storage[J]. Power system protection and control, 2011, 39(3): 29-33.
[16] 白志红, 阮新波, 徐林. 基于LCL滤波器的并网逆变器的控制策略[J]. 电工技术学报, 2011, 26(S1): 118-124.
BAI Z H, RUAN X B, XU L.Control strategy of grid-connected inverter based on LCL filter[J]. Transactions of China Electrotechnical Society, 2011, 26(S1): 118-124.
[17] LIU S, GE B, LIU Y, et al.Modeling, analysis, and parameters design of LC-filter-integrated quasi-Z-source indirect matrix converter[J]. IEEE transactions on power electronics, 2016, 31(11): 7544-7555.
基金
国家自然科学基金（51807001）; 北京市自然科学基金（21JC0026）; 北京市科技计划（Z201100004520016）
PDF(3104 KB)
