有源配电网混合型有源滤波技术研究
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摘要
提出了一种具有有源滤波功能的分布式电源控制方法。光伏逆变器不仅具备直流光伏电源能量变换和并网输出功能,也可运行至有源滤波工作模式。该控制方法可有效改善配电网电能质量,降低配电网电能质量调控费用。详述了光伏逆变器谐波补偿和功率变换控制方法;并提出了一种光伏最大功率追踪算法,可有效避免变换器过调制的情形。最后,通过仿真验证了所提方法的有效性和可行性。
An harmonic current compensation as active power filter of a distributed generation(DG) connected in a distribution network was studied.This compensation is performed by operating the three-phase grid-connected inverter,whose DC bus is connected to the photovoltaic(PV) generator,acting as active power filter and DG,which can improve the power quality and effectively reduce the cost of power quality management.A P&O algorithm is used for maximum power point tracking,along with a control algorithm for DC bus voltage regulation for avoiding over modulation.To validate the study,simulation results were obtained in an experimental setup.
An harmonic current compensation as active power filter of a distributed generation(DG) connected in a distribution network was studied.This compensation is performed by operating the three-phase grid-connected inverter,whose DC bus is connected to the photovoltaic(PV) generator,acting as active power filter and DG,which can improve the power quality and effectively reduce the cost of power quality management.A P&O algorithm is used for maximum power point tracking,along with a control algorithm for DC bus voltage regulation for avoiding over modulation.To validate the study,simulation results were obtained in an experimental setup.
引文
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[2] 赵晋泉,刘绪,林昌年,等.单相光伏大量接入的三相不平衡配电网无功优化[J].电力系统自动化,2016,40(13):13-18,70.
[3] 陈青恒,袁晓杰,何宇俊,等.投资开放模式下基于全寿命周期分析的离网型微网投资与优化[J].电网技术,2018,42(8):2448-2457.
[4] 王明深,穆云飞,贾宏杰,等.考虑电动汽车集群储能能力和风电接入的平抑控制策略[J].电力自动化设备,2018,38(5):211-219.
[5] 张宇帆,艾芊,肖斐,等.数据驱动电能质量分析现状及其支撑技术与展望[J].电力自动化设备,2018,38(11):187-196.
[6] 王守相,刘响,张颖.多DG不确定性建模及其对配电网谐波潮流的影响[J].电力自动化设备,2018,38(10):1-6.
[7] 原凯,宋毅,李敬如,等.分布式电源与电动汽车接入的谐波特征研究[J].中国电机工程学报,2018,38:53-57.
[8] 王凯,强健,同向前,等.基于谐波能量的配电网谐波溯源方法研究[J].电力电容器与无功补偿,2018,39(3):140-144.
[9] 黄晓明,范志华,苗世洪,等.含储能单元的统一电能质量调节器功率协调控制策略[J].高电压技术,2018,44(10):3390-3398.
[10] 张国荣,吴飞翔,解润生,等.LCL有源电力滤波器单电流反馈有源阻尼方法[J].电力电子技术,2018,52(9):112-115.
[11] 张国荣,吴一鸣,彭勃,等.三相四线制三电平变流器的优化调制策略[J].电力系统自动化,2018,42(22):187-193.
[12] 周武,乐健,杨金涛,等.中压动态电压恢复器的虚拟阻抗控制策略[J].电网技术,2016,40(8):2525-2532.
[13] 王宝安,商姣,陈豪.SVG用于单相负荷电能质量综合治理时相电流指令的计算[J].电力自动化设备,2016,36(2):57-64.