三相单级式LCL型逆变器光伏并网控制方法研究

doi:10.11985/2016.10.005

电气工程学报 ›› 2016, Vol. 11 ›› Issue (10): 24-30.doi: 10.11985/2016.10.005

三相单级式LCL型逆变器光伏并网控制方法研究

李萍,张利,祁鲲

北京信息科技大学自动化学院电气工程系北京 100192

收稿日期:2016-05-31 出版日期:2016-10-25 发布日期:2020-04-30
作者简介:李萍, 女 1971年生,硕士,主要从事电力电子变换器控制、电力传动等方面的研究。|张利, 女 1979年生,博士,主要从事电力系统分析与控制方面的研究。
基金资助:
北京市教育委员会科技计划项目(KM201311232007);北京市属高等学校高层次人才引进与培养计划项目资助(CIT&TCD201404126)

Research on PV Grid-Connected Control Methods of Single-Stage Three-Phase Inverter With LCL Filter

Ping Zhang Li,Qi Kun Li,Kun Qi

Beijing Information Science and Technology University Beijing 100192 China

Received:2016-05-31 Online:2016-10-25 Published:2020-04-30

摘要/Abstract

摘要：

可再生能源并网发电的可靠性、稳定性是微电网协调控制分布式发电系统实现能源综合梯级利用及大电网稳定运行的重要保障。针对交流微电网中太阳能光伏并网,采用单级式LCL型光伏并网逆变器拓扑结构并设计滤波器参数;采用有源阻尼消除LCL谐振尖峰,抑制逆变器输出电流的振荡;利用电压前馈控制削减并网公共节点电网电压对并网电流的影响;应用准比例谐振调节器实现电流跟踪控制。仿真结果表明,在光伏能源功率波动情况下,逆变器能实现能量以单位功率因数并网,以及系统快速稳定运行,证明控制方法可行、有效。

关键词: 光伏并网, 单级式LCL型逆变器, 准PR, 有源阻尼, 电网电压前馈

Abstract:

Reliability and stability of renewable energy grid-connected generation is base of micro-grids coordinating control distributed power generation system (DPGS) completing energy source comprehensive cascade use and making up grid power stable operation. Solar photovoltaic grid connected is applied in an AC micro-grid. Appropriate power control methods are designed. The topology of single-stage photovoltaic grid connected inverter with LCL filters and its references are designed. The scheme of active damping by filter capacitor current is applied to suppress the transient resonance of LCL filter.Control method of power grid voltage feed forward is used in protecting the grid connected current from voltage harmonics of the point of common coupling(PCC)of the power grid. Quasi-proportional-resonant (quasi-PR) method is applied in grid-connected current tracking demanded current. The simulation results show that system operation is fast and stable by grid-connected inverter under PV energy fluctuation and the methods are proved effective and feasible.

Key words: Photovoltaic grid-connection, single-stage inverter with LCL filter, quasi-proportional-resonant, active damping, power grid voltage feed forward

中图分类号:

TM464

李萍,张利,祁鲲. 三相单级式LCL型逆变器光伏并网控制方法研究[J]. 电气工程学报, 2016, 11(10): 24-30.

Ping Zhang Li,Qi Kun Li,Kun Qi. Research on PV Grid-Connected Control Methods of Single-Stage Three-Phase Inverter With LCL Filter[J]. Journal of Electrical Engineering, 2016, 11(10): 24-30.

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三相单级式LCL型逆变器光伏并网控制方法研究

Research on PV Grid-Connected Control Methods of Single-Stage Three-Phase Inverter With LCL Filter

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