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首页> 外文期刊>International journal of sustainable energy >Power quality improvement of solar photovoltaic transformer-less grid-connected system with maximum power point tracking control
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Power quality improvement of solar photovoltaic transformer-less grid-connected system with maximum power point tracking control

机译:具有最大功率点跟踪控制的无光伏太阳能并网系统的电能质量改善

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摘要

This paper presents a transformer-less single-stage grid-connected solar photovoltaic (PV) system with active reactive power control. In the absence of active input power, grid-tied voltage source converter (VSC) is operated in the reactive power generation mode, which powers control circuitry and maintains regulated DC voltage. Control scheme has been implemented so that the grid-connected converter continuously serves local load.Adata-based maximum power point tracking (MPPT) has been implemented at maximum power which performs power quality control by reducing total harmonic distortion (THD) in grid-injected current under varying environmental conditions. Standards (IEEE-519/1547) stipulates that current with THD greater than 5% cannot be injected into the grid by any distributed generation (DG) source. MPPT tracks actual variable DC link voltage while deriving maximum power from PV array and maintains DC link voltage constant by changing the converter modulation index. Simulation results with the PV model and MPPT technique validations demonstrate effectiveness of the proposed system.
机译:本文提出了一种具有无功功率控制的无变压器单级并网太阳能光伏(PV)系统。在没有有功输入功率的情况下,并网电压源转换器(VSC)工作在无功发电模式下,该模式为控制电路供电并保持稳定的DC电压。已实施控制方案,以使并网转换器连续为本地负载提供服务。已在最大功率下实现了基于数据的最大功率点跟踪(MPPT),该功能通过减少并网逆变器中的总谐波失真(THD)来执行功率质量控制在各种环境条件下的电流。标准(IEEE-519 / 1547)规定,任何分布式发电(DG)源均不能将THD大于5%的电流注入电网。 MPPT跟踪实际的可变直流母线电压,同时从PV阵列中获取最大功率,并通过更改转换器的调制指数来保持直流母线电压恒定。 PV模型和MPPT技术验证的仿真结果证明了所提出系统的有效性。

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