含扶贫式光伏农村配电网电能质量综合控制技术研究
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摘要
针对含扶贫式光伏的农村配电网运行特点,在逆变器功率控制基础上,提出了光储联合发电分时协调控制技术。分析了光伏电源接入农网后逆变器电压/无功控制原理,在某低压台区建立了光储联合发电系统。其中对逆变器设置死区控制环节保证无功调节优先性,同时分时对光伏电源和储能进行协调控制、平滑功率输出。最后结合Opendss软件对所提出的控制策略进行验证,仿真结果表明该控制策略能够有效提升农网电能质量运行水平。
Aiming at the operation characteristics of rural distribution network with photovoltaic for poverty alleviation,this paper presents a coordinative control technology of grid connected photovoltaic and energy storage system based on the power control of inverters. The voltage/reactive power control principle of the inverter was analyzed,and the system of photovoltaic and energy storage was established in a low voltage distribution network. The control of the dead zone of the inverter is set to guarantee the priority of reactive power adjusting,meanwhile,the power supply and energy storage can be controlled coordinately to smooth the output of power. Finally,the proposed control strategy is verified through the low voltage distribution network with Opendss software,and the simulation results show that the proposed control strategy can effectively improve the power quality of the rural grid.
Aiming at the operation characteristics of rural distribution network with photovoltaic for poverty alleviation,this paper presents a coordinative control technology of grid connected photovoltaic and energy storage system based on the power control of inverters. The voltage/reactive power control principle of the inverter was analyzed,and the system of photovoltaic and energy storage was established in a low voltage distribution network. The control of the dead zone of the inverter is set to guarantee the priority of reactive power adjusting,meanwhile,the power supply and energy storage can be controlled coordinately to smooth the output of power. Finally,the proposed control strategy is verified through the low voltage distribution network with Opendss software,and the simulation results show that the proposed control strategy can effectively improve the power quality of the rural grid.
引文
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[10]黑阳,张紫光,李春来,等.含光伏直流微电网的功率分散协同控制技术研究[J].电力科学与工程,2016,32(1):43-48.
[11]高峰.光伏并网系统的优化设计与协调控制技术展望[J].南方电网技术,2016,10(3):91-97.
[2]金炜,徐斌,丁津津,等.基于协同自治的光伏扶贫农网电能质量综合控制技术研究[J].电力电容器与无功补偿,2017,38(3):157-161.Jin Wei,Xu Bin,Ding Jinjin,et al. Research on Power Quality Integrated Control Technology for Photovoltaic Poverty Alleviation Rural Grid Based on Coordination and Autonomy[J]. Power Capacitor&Reactive Power Compensation,2017,38(3):157-161.
[3]韩富佳,王淳.基于Matlab的分布式光伏并网发电系统对配电网电能质量的影响[J].电测与仪表,2015,52(14):16-21.Han Fujia,Wang Chun. Influences of the distributed photovoltaic gridconnected generation system on the distribution network power quality based on Matlab[J]. Electrical Measurement&Instrumentation,2015,52(14):16-21.
[4] Nousiainen L,Puukko J,Messo T,et al. Photovoltaic generator as an input source for power electronic converters[J]. IEEE Transactions on Power Electronics,2013,28(6):3028-3038.
[5]苏文辉,林章岁,李喜兰,等.分布式电源对配电网静态电压稳定的影响研究[J].电测与仪表,2014,51(14):41-46.
[6]刘倩.并网分布式光伏对配电网电压影响研究[D].南京:东南大学,2016.
[7]秦睿,梁福波,智勇,等.基于逆变器的光伏电站无功电压控制技术研究[J].电力电子技术,2016,50(3):45-48.
[8]余谦,孙玉坤,张亮.基于PQ控制策略的光伏电源对电网电压的影响及改善[J].电测与仪表,2016,53(15):1-6.
[9]高志强,孟良,梁宾,等.光储联合发电系统控制策略[J].储能科学与技术,2013,2(3):300-306.
[10]黑阳,张紫光,李春来,等.含光伏直流微电网的功率分散协同控制技术研究[J].电力科学与工程,2016,32(1):43-48.
[11]高峰.光伏并网系统的优化设计与协调控制技术展望[J].南方电网技术,2016,10(3):91-97.